Source: https://patents.google.com/patent/US8318131B2/en
Timestamp: 2019-04-24 15:21:28
Document Index: 221331936

Matched Legal Cases: ['Application No. 61', 'Application No. 61', 'Application No. 61', 'Application No. 61', 'Application No. 61', 'art 2010']

US8318131B2 - Chemical processes and reactors for efficiently producing hydrogen fuels and structural materials, and associated systems and methods - Google Patents
Chemical processes and reactors for efficiently producing hydrogen fuels and structural materials, and associated systems and methods Download PDF
US8318131B2
US8318131B2 US13/027,208 US201113027208A US8318131B2 US 8318131 B2 US8318131 B2 US 8318131B2 US 201113027208 A US201113027208 A US 201113027208A US 8318131 B2 US8318131 B2 US 8318131B2
US13/027,208
US20110226988A1 (en
2008-01-07 Priority to US12/006,774 priority Critical patent/US7628137B1/en
2011-02-14 Priority to US13/027,208 priority patent/US8318131B2/en
2011-09-22 Publication of US20110226988A1 publication Critical patent/US20110226988A1/en
2012-11-27 Publication of US8318131B2 publication Critical patent/US8318131B2/en
Chemical processes and reactors for efficiently producing hydrogen fuels and structural materials and associated systems and methods. A representative process includes dissociating a hydrogen donor into dissociation products by adding energy to the hydrogen donor, wherein the energy includes waste heat generated by a process other than dissociating the hydrogen donor. The process can further include providing, from the dissociation products, a structural building block and/or a hydrogen-based fuel, with the structural building block based on carbon, nitrogen, boron, silicon, sulfur, and/or a transition metal.
The present application is directed generally to chemical processes and reactors for efficiently producing hydrogen fuels and structural materials, and associated systems and methods. In particular embodiments, such processes can be used to produce clean-burning, hydrogen-based fuels from a wide variety of feedstocks, and can produce structural building blocks from carbon and/or other elements that are released when forming the hydrogen-based fuels.
FIG. 1 is a flow diagram illustrating a process for efficiently producing hydrogen-based fuels and constituents for building durable goods in accordance with an embodiment of the presently disclosed technology.
FIG. 2 is a partially schematic, partially cross-sectional illustration of a system that receives energy from waste heat and/or renewable energy sources in accordance with an embodiment of the presently disclosed technology.
FIG. 3 is a partially schematic illustration of a system that includes a reactor in combination with counter-flow heat exchangers in accordance with an embodiment of the presently disclosed technology.
FIG. 4 is a diagram showing an architectural construct having a molecular structure in accordance with an embodiment of the presently disclosed technology.
FIG. 5 an isometric view of an architectural construct configured as a solid mass in accordance with an embodiment of the presently disclosed technology.
FIG. 6 is a cross-sectional side view of an architectural construct having parallel layers in accordance with an embodiment of the presently disclosed technology.
FIG. 7 is a side view of an architectural construct having interconnected parallel layers in accordance with an embodiment of the presently disclosed technology.
FIG. 8 is a cross-sectional side view of an architectural construct having parallel layers in accordance with an embodiment of the presently disclosed technology.
FIG. 9 is a cross-sectional side view of an architectural construct having concentric tubular layers in accordance with an embodiment of the presently disclosed technology.
Several examples of devices, systems and methods for efficiently producing hydrogen fuels and structural materials are described below. The efficiencies can result from using waste heat produced by other processes, renewable energy sources, and/or internal heat exchangers (e.g., counterflow or counter-current heat exchangers). The processes can produce clean-burning fuel and can re-purpose carbon and/or other constituents for use in durable goods, including polymers and carbon composites. Although the following description provides many specific details of the following examples in a manner sufficient to enable a person skilled in the relevant art to practice, make and use them, several of the details and advantages described below may not be necessary to practice certain examples of the technology. Additionally, the technology may include other examples that are within the scope of the claims but are not described here in detail.
A method in accordance with a particular embodiment includes dissociating a hydrogen donor into dissociation products by adding energy to the hydrogen donor, with the energy including waste heat generated by a process other than dissociating the hydrogen donor. For example, the waste heat can be obtained from the products of a combustion process. The method can further include providing a hydrogen-based fuel and/or a structural building block that includes carbon, nitrogen, boron, silicon, sulfur, and/or a transition metal. The structural building block and the hydrogen-based fuel are provided from the dissociation products, and in particular embodiments, are formed from the dissociation products.
A method in accordance with another embodiment of the technology includes dissociating a first hydrogen donor mass into first dissociation products and, from the first dissociation products, providing a hydrogen-based fuel and/or a structural building block based on carbon, nitrogen, boron, silicon, sulfur, and/or a transition metal. The method can further include transferring heat from the structural building block, the dissociation products, and/or the hydrogen-based fuel to a second hydrogen donor mass, and dissociating the second hydrogen donor mass into second dissociation products. Transferring heat from the process of dissociating the first hydrogen donor to the process of dissociating the second hydrogen donor can reduce the amount of energy required to dissociate the second hydrogen donor and can accordingly improve the overall efficiency of the process.
FIG. 1 is a flow diagram illustrating a representative process in accordance with several embodiments of the present technology. FIGS. 2 and 3 illustrate representative reactors in which such processes can be conducted, and FIGS. 4-9 illustrate architectural constructs that can be formed using the methods described herein.
FIG. 1 is a flow diagram illustrating a chemical process 180 for forming hydrogen-based fuels and constituents (e.g., architectural constructs) for forming durable goods in accordance with an embodiment of the present technology. Process portion 181 includes dissociating a hydrogen donor into dissociation products by adding energy to the hydrogen donor. In many instances, the hydrogen donor includes a hydrocarbon, but in other embodiments, the hydrogen donor can include carbon-based compounds other than hydrocarbon fuels (e.g., carbohydrates, alcohols, esters, cellulose and/or others). In still further embodiments, the hydrogen donor can include hydrogen atoms in combination with elements other than carbon. For example, nitrogenous compounds (e.g., ammonia and/or urea) can serve a similar function. In any of these embodiments, the energy added to the hydrogen donor to produce the dissociation products can be obtained from waste heat generated by a process other than dissociating the hydrogen donor (process portion 182). For example, process portion 182 can include re-using waste heat from an internal combustion engine or other engine to drive the process of dissociating the hydrogen donor. In other embodiments, the heat can be obtained from fuel cells, regenerative braking or other sources. In general, the heat is available at a temperature high enough to readily transfer to a process or reaction zone, or, in cases of lower grade heat, the heat can be converted to a higher temperature output via another process.
In at least some of the foregoing embodiments, the waste heat identified in process portion 182 may be insufficient by itself to carry out the chemical dissociation identified in process portion 181. Accordingly, process portion 183 includes supplementing the waste heat with heat that is obtained from a sustainable, renewable energy source, if possible. As used herein, the terms “sustainable” and “renewable” in the context of energy sources refer generally to sources that do not require rapidly depleting energy stores that take a significantly longer time to replace. For example, these terms can include solar energy, wave energy, wind energy, geothermal energy, tidal energy, and falling water energy, but do not include fossil fuel energy.
Process portion 184 includes providing useful end products from the dissociation products formed in process portion 181. The end products can include a structural building block (as identified in process portion 185) and/or a hydrogen-based fuel (as identified in process portion 186). The structural building block includes compositions that may be further processed to produce architectural constructs. For example, the structural building blocks can include compounds or molecules resulting from the dissociation process and can include carbon, boron, nitrogen, silicon, sulfur, and/or transition metals. In general, the building block element does not include hydrogen. In a specific example, methane is dissociated to form hydrogen and carbon dioxide or carbon monoxide (structural building blocks). The carbon dioxide and/or carbon monoxide can be further processed to form polymers, graphene, carbon fiber, and/or another architectural construct. The architectural construct can include a self-organized structure (e.g., a crystal) formed from any of a variety of suitable elements, including the elements described above (carbon, nitrogen, boron, silicon, sulfur, and/or transition metals). In any of these embodiments, the architectural construct can form durable goods, e.g., graphene or carbon composites, and/or other structures described further with reference to FIGS. 4-9. In other embodiments, the structural building blocks can form polymer films or other durable goods.
The hydrogen-based fuel identified in process portion 186 can include diatomic hydrogen, or a hydrogen compound that is suitable for use as a fuel. In general, the hydrogen-based fuel will have a higher energy and/or provide improved combustion characteristics and/or prevent or reduce pollution, when compared to the hydrogen donor from which it is formed. For example, the hydrogen-based fuel can have a greater dissociation energy than the dissociation energy of the hydrogen donor, by virtue of the energy added to the constituents of the hydrogen-based fuel during dissociation (and in at least some cases), subsequent processes. Process portion 187 includes transferring heat from the dissociation products, the structural building block, and/or the hydrogen-based fuel to a subsequent hydrogen donor. For example, process portion 187 can include transferring heat from hot dissociation products (which were heated in an endothermic dissociation process) to an incoming mass or volume of a hydrogen donor. This arrangement of counter-current or counter-flow heat exchange makes use of heat which would otherwise be wasted when the relevant constituent is cooled for subsequent use, and accordingly improves the overall efficiency of the process. In particular embodiments, the process can include extracting work from the thermal and/or pressure potential energy of the dissociation products, the structural building block, and/or the hydrogen-based fuel prior to removing additional heat from these constituents for any of a variety of purposes including storage. The work can be performed by a turbine, heat engine, fuel cell or other suitable device.
In particular embodiments, the hydrogen donor identified in process portion 181 can include methane. The methane itself can be obtained from a variety of suitable sources. In at least some embodiments, the sources include renewable sources, for example, methane obtained from the anaerobic digestion of a renewable biomass, or from landfills. Equations 1-4, identified below, depict endothermic reactions in which methane is dissociated to form hydrogen and carbon or a carbon compound.
CH4+HEAT1→C+2H2 Equation 1
CH4+H2O+HEAT2→CO+3H2 Equation 2
CH4+CO2+HEAT3→2CO+2H2 Equation 3
C6H10O5+HEAT4→CH3OH+4CO+3H2+C Equation 4
In particular embodiments, the forgoing endothermic reactions may be used in conjunction with an exothermic reaction to further process the hydrogen-based fuel. For example, Equation 5 below represents an exothermic reaction that uses the dissociation products of Equation 2 or Equation 3 to form methanol.
2CO+2H2→CH3OH+HEAT Equation 5
In some instances, it is beneficial to produce methanol rather than diatomic hydrogen due to its enhanced versatility as a fuel, and the ability to store methanol in existing tanks currently used for liquid hydrocarbon fuels. Further details of combined exothermic and endothermic reactions and the associated heat exchange processes that can be exploited with such combinations are disclosed in co-pending U.S. application Ser. No. 13/027,060 titled “REACTOR VESSELS WITH PRESSURE AND HEAT TRANSFER FEATURES FOR PRODUCING HYDROGEN-BASED FUELS AND STRUCTURAL ELEMENTS, AND ASSOCIATED SYSTEMS AND METHODS” filed concurrently herewith and incorporated herein by reference.
Equation 6 below characterizes another methane conversion process that produces an alkene, e.g., ethylene or ethene.
CH4+C→C2H4 Equation 6
Ethene has widespread industrial and plant hormone applications. One aspect of the process represented by Equation 6 is that it may not include a hydrogen-based fuel as a product (e.g., unless the ethene is further processed to produce such a fuel). Accordingly, reactions in accordance with the present technology can produce architectural constructs, hydrogen-based fuels, or both.
In still further embodiments, the hydrogen donor can include elements other than carbon, e.g., nitrogen, as indicated by Equations 7 and 8 below.
2NH3+HEAT7→N2+3H2 Equation 7
NH3OH+CxHyOz+HEAT8→CO+N2+H2 Equation 8
The CxHyOz constituent can be provided by graphene or another architectural construct loaded with hydrogen.
The foregoing processes can be conducted in an autogenous manner. In particular, the carbon, nitrogen, and/or other constituents resulting from producing the hydrogen-based fuel can be controlled and reinvested in useful end products, rather than being released into the environment where they can accumulate to toxic levels. The result of this type of cycle can mimic naturally occurring carbon and nitrogen cycles. It is expected that implementing such cycles can result in a higher carrying capacity of the earth (e.g., a higher capacity for human population) without a decrease in the quality of living and in fact, with an expected increase in the quality of living. Accordingly, processes that deplete finite resources, toxify the environment, and/or waste or fail to reinvest or utilize output products are not considered autogenous. One aspect of the presently disclosed technology is to make forming hydrogen-based fuels more autogenous.
Representative Reactors
The foregoing reactions may be conducted in a wide variety of reactors described in several co-pending patent applications assigned to the assignee of the present application. Aspects of a representative reactor are described in general terms with respect to FIGS. 2 and 3 below, and are disclosed in greater detail in co-pending U.S. patent application Ser. No. 13/026,996 titled “REACTOR VESSELS WITH TRANSMISSIVE SURFACES FOR PRODUCING HYDROGEN-BASED FUELS AND STRUCTURAL ELEMENTS, AND ASSOCIATED SYSTEMS AND METHODS” filed concurrently herewith and incorporated herein by reference.
FIG. 2 is a partially schematic illustration of a representative system 100 that includes a reactor 110. The reactor 110 further includes a reactor vessel 111 that encloses or partially encloses a reaction zone 112. In at least some instances, the reactor vessel 111 has one or more transmissive surfaces positioned to facilitate the chemical reaction taking place within the reaction zone 112. In a representative example, the reactor vessel 111 receives a hydrogen donor provided by a donor source 130 to a donor entry port 113. For example, the hydrogen donor can include methane or another hydrocarbon. A donor distributor or manifold 115 within the reactor vessel 111 disperses or distributes the hydrogen donor into the reaction zone 112. The reactor vessel 111 also receives steam from a steam/water source 140 via a steam entry port 114. A steam distributor 116 in the reactor vessel 111 distributes the steam into the reaction zone 112. The reactor vessel 111 can further include a heater 123 that supplies heat to the reaction zone 112 to facilitate endothermic reactions. The power for the heater (e.g., electrical power) can be provided by a renewable energy source 165. As described above, the renewable energy source 165 can include a solar, wind, water and/or other suitable sustainable sources. The reactions performed at the reaction zone 112 can include dissociating methane or another hydrocarbon into hydrogen or a hydrogen compound, and carbon or a carbon compound, (as discussed above with reference to Equations 1-6), or nitrogen or a nitrogen compound (as discussed above with reference to Equations 7-8). The products of the reaction exit the reactor vessel 111 via an exit port 117 and are collected at a reaction product collector 160 a.
The system 100 can further include a source 150 of radiant energy (e.g., waste heat) and/or additional reactants, which provides constituents to a passage 118 within the reactor vessel 111. For example, the heat/reactant source 150 can include a combustion chamber 151 that provides hot combustion products 152 to the passage 118, as indicated by arrow A. The combustion products 152 and associated waste heat are produced by a process separate from the dissociation process (e.g., a power generation process). A combustion products collector 160 b collects combustion products exiting the reactor vessel 111 for further recycling and/or other uses. In a particular embodiment, the combustion products 152 can include hot carbon dioxide, carbon monoxide, water vapor, and/or other constituents. One or more transmissive surfaces 119 are positioned between the reaction zone 112 (which can be disposed annularly around the passage 118) and an interior region 120 of the passage 118. The transmissive surface 119 can accordingly allow radiant energy and/or a chemical constituent to pass radially outwardly from the passage 118 into the reaction zone 112, as indicated by arrows B. By delivering the radiant energy (e.g., heat) and/or chemical constituent(s) provided by the flow of combustion products 152, the system 100 can enhance the reaction taking place in the reaction zone 112, for example, by increasing the reaction zone temperature and/or pressure, and therefore the reaction rate, and/or the thermodynamic efficiency of the reaction. The foregoing process can accordingly recycle or reuse energy and/or constituents that would otherwise be wasted, in addition to facilitating the reaction at the reaction zone 112.
As noted above, the combustion products 152 can include steam and/or other constituents that may serve as reactants in the reaction zone 112. Accordingly, the transmissive surface 119 can be manufactured to selectively allow such constituents into the reaction zone 112, in addition to or in lieu of admitting radiant energy into the reaction zone 112. In a particular embodiment, the transmissive surface 119 can be formed from a carbon crystal structure, for example, a layered graphene structure. The carbon-based crystal structure can include spacings (e.g., between parallel layers oriented transverse to the flow direction A) that are deliberately selected to allow water molecules to pass through as a result of a pressure, temperature, impedance, and/or concentration gradient. At the same time, the spacings can be selected to prevent useful reaction products produced in the reaction zone 112 from passing out of the reaction zone. Accordingly, the transmissive surface 119 can be formed by using the same type of architectural constructs produced directly or indirectly by processes conducted in the reactor 110. This loop represents one example of an autogenous cycle in which a process is used to form a product that increases the efficiency of the process.
FIG. 3 is a partially schematic illustration of system 300 that includes a reactor 310 in combination with heat exchangers and separators configured to transfer heat and segregate reaction products in accordance with another embodiment of the disclosure. In a particular aspect of this embodiment, the system 300 includes a steam/water source 340 that provides steam to a reactor vessel 311 to facilitate product formation. Steam from the steam/water source 340 can be provided to the reactor 310 via one or more channels. In a particular embodiment, a first channel includes a first water path 341 a that passes through a first heat exchanger 370 a and into the reactor vessel 311 via a first steam distributor 316 a. Products removed from the reactor vessel 311 pass through a reactor product exit port 317 and along a products path 361. The products path 361 passes through the first heat exchanger 370 a in a counter-flow or counter-current manner to cool the products and heat the steam entering the reactor vessel 311. The products continue to a reaction product separator 380 a that segregates useful end products (e.g., hydrogen and carbon or carbon compounds) which are then collected at a products collector 360 a. Water remaining in the products path 361 can be separated at the reaction product separator 380 a and returned to the steam/water source 340.
A second channel via which the steam/water source 340 provides steam to the reactor 310 includes a second water path 341 b that passes through a second heat exchanger 370 b. Water proceeding along the second water path 341 b enters the reactor 310 in the form of steam via a second stream distributor 316 b. This water is heated by combustion products that have exited a radiant energy/reactant source 350 (e.g., exited a combustion chamber 351 at a combustion products outlet 353), and passed through the combustion product passage 318 (which includes a transmissive surface 319) along a combustion products path 354. The spent combustion products are collected at a combustion products collector 360 b and can include nitrogen compounds, phosphates, used illuminant additives (e.g., sources of sodium, magnesium and/or potassium), and/or other compositions that may be recycled or used for other purposes (e.g., agricultural purposes.)
In addition to heating water along the second water path 341 b and cooling the combustion products along the combustion products path 354, the second heat exchanger 370 b can heat the hydrogen donor passing along a donor path 331 to a donor distributor 315 located within the reactor vessel 311. In particular, the system 300 can include a donor vessel 330 that houses a hydrogen donor, e.g., a hydrocarbon such as methane, or a nitrogenous donor such as ammonia. The donor vessel 330 can include one or more heaters 332 (shown as first heater 332 a and a second heater 332 b) to vaporize and/or pressurize the hydrogen donor within. A three-way valve 333 and a regulator 334 control the amount of fluid and/or vapor that exits the donor vessel 330 and passes along the donor path 331 through the second heat exchanger 370 b and into the reactor vessel 311.
In the reactor vessel 311, the combustion products 152 pass through the combustion products passage 318 while delivering radiant energy and/or reactants through the transmissive surface 319 into the reaction zone 312. After passing through the second heat exchanger 370 b, the combustion products 152 can enter a combustion products separator 380 b that separates water from the combustion products. The water returns to the steam/water source 340 and the remaining combustion products are collected at a combustion products collector 360 b. In a particular embodiment, the separator 380 b can include a centrifugal separator that is driven by the kinetic energy of the combustion product stream. If the kinetic energy of the combustion product stream is insufficient to separate the water by centrifugal force, a motor/generator 381 can add energy to the separator 380 b to provide the necessary centrifugal force. If the kinetic energy of the combustion product stream is greater than is necessary to separate water, the motor/generator 381 can produce energy, e.g., to be used by other components of the system 300. The controller 190 receives inputs from the various elements of the system 300 and controls flow rates, pressures, temperatures, and/or other parameters.
One feature of at least some of the foregoing embodiments is that the reactor system can include internal heat exchangers that reduce internal losses by recycling heat. For example, such heat exchangers can be used to cool the combustion products and/or chemical reaction products, while heating the reaction zone, incoming steam, and/or other incoming chemical reactants. This arrangement can improve the efficiency with which hydrogen-based fuels and architectural constructs are formed, thus improving the cost-competitive position of these products.
Representative Architectural Constructs
The process 180 described above with reference to FIG. 1 can produce architectural constructs (or associated structural building block precursors) in addition to or in lieu of producing hydrogen-based fuels. Architectural constructs include configurable building block structures that are formed to exhibit useful properties. Architectural constructs can include a synthetic matrix and/or other self-organizing structure or arrangement of crystals. The construct can be carbon-based (e.g., in the case of graphene or graphite), or based on other elements or components (e.g., boron, nitrogen, or boron nitride). The construct can be configured as a solid mass, as layers that are as thin as an atom, or in other arrangements and variations. The configuration of the construct is largely responsible for determining its behavior under a variety of conditions. As a result, the architectural construct can be designed to perform highly specialized tasks in a wide range of applications. Five representative sets of properties are particularly amenable to technological uses: (i) thermal properties; (ii) electromagnetic, optical, and acoustic properties; (iii) catalytic properties; (iv) capillary properties; and (v) sorptive properties. Although they are grouped in the foregoing manner for purposes of discussion, properties from different categories are sometimes interrelated or associated with one another. Accordingly, an architectural construct can be configured to exhibit some or all of the properties discussed throughout this specification.
The behavior of the architectural construct depends on the composition, dopants, and coatings (including catalysts) that are applied to the construct. When configured as layers, the behavior of the construct also depends on the layer thickness, spacers between layers, the distances separating the layers, and the structures used to support and/or separate the layers. From a macroscopic standpoint, it can be configured to have a specific density, modulus of elasticity, and/or section modulus. From a microscopic standpoint, the construct can be designed to act as a molecular processor, charge processor, and/or bio processor.
FIGS. 4-9 illustrate representative architectural constructs. Further representative constructs are included in co-pending U.S. application Ser. No. 13/027,214 titled “ARCHITECTURAL CONSTRUCT HAVING FOR EXAMPLE A PLURALITY OF ARCHITECTURAL CRYSTALS”, filed concurrently herewith and incorporated herein by reference. FIG. 4 shows a molecular diagram of a layer 400 which can in turn form a matrix arrangement of crystals. The layer 400 can include graphene, which is an atom-thick planar sheet of carbon. FIG. 5 shows an isometric view of an architectural construct 500 that is configured as a solid mass. The architectural construct 500 can include, for example, graphite or boron nitride. Architectural constructs configured as a solid mass can include multiple, single-atom-thick layers stacked together. Representative architectural constructs configured as a solid mass are specialized, e.g., altered to behave in a specific way.
In some implementations, the solid mass is specialized by doping. For example, an architectural construct that includes graphene may have areas that are reacted with boron to form both stoichiometric and non-stoichiometric subsets. The graphene can be further combined with nitrogen and can include both graphene and boron nitride graphene with a nitrogen interface. In some implementations, compounds are built upon the architectural construct. For example, from a boron nitride interface, a designer can build magnesium-aluminum-boron compounds. By specializing an architectural construct in these ways, a designer can create a construct that exhibits different properties than would a construct composed of only one substance.
Although an atom-thick sheet and solid mass of crystals exhibit many of the properties discussed below, other configurations are capable of yielding a wider range of properties and achieving more useful outcomes. For example, FIG. 6 is a cross-sectional side view of an architectural construct 600 having parallel layers in accordance with an embodiment of the technology. Parallel layers of an architectural construct may be formed from any of a number of suitable substances, such as graphene, graphite, or boron nitride. Parallel layers may be rectangular, circular, or can have other shapes. In FIG. 6, the layers are circular and include a hole through which a support tube 610 supports the architectural construct 600. The layers are each separated by a distance 620, creating zones 630 between the layers.
Architectural constructs can be formed by machining a single crystal into a desired shape and exfoliating the single crystal into layers. U.S. Pat. No. 6,503,584 and pending U.S. patent application Ser. No. 12/857,515, filed on Aug. 16, 2010, entitled “APPARATUSES AND METHODS FOR STORING AND/OR FILTERING A SUBSTANCE,” both of which are incorporated herein by reference, describe this and other approaches. In other embodiments the architectural constructs can be built up on a seed material, e.g., using an epitaxial growth process, as disclosed in co-pending U.S. application Ser. No. 13/027,198 titled “COUPLED THERMOCHEMICAL REACTORS AND ENGINES, AND ASSOCIATED SYSTEMS AND METHODS”, filed concurrently herewith and incorporated herein by reference.
FIG. 7 is a side view of an architectural construct 700 that includes parallel layers that are each thicker than one atom. The layers can be supported relative to each other with intermittent spacers 710. The parallel layers can vary from only a few atoms thick to thicknesses of 20 atoms or more.
In some implementations, all of the layers have the same thickness, while in other implementations individual layers can have different thicknesses. FIG. 8 is a cross-sectional side view of an architectural construct 800 that has parallel layers with various different thicknesses. As discussed above, layers thicker than an atom or differing from each other in thicknesses may be exfoliated from a single crystal by controlling the depth that a fluid is diffused into the crystal to exfoliate the layers (e.g., by introducing impurities or dopants at the desired depth).
Architectural constructs can have parallel layers that are spaced an equal distance as shown in FIG. 6 or by unequal distances, as shown in FIG. 8. The distances between the layers of the architectural construct 800 vary in the arrangement shown in FIG. 8. For example, the distance between the layers of a first set 810 of layers is greater than the distance between the layers of a second set 820 of layers, meaning that the zones between layers of the first set 810 are larger than those of the second set 820.
FIG. 9 shows a cross-sectional side view of an architectural construct 900 consisting of concentric tubular layers of a matrix characterization of crystals. For example, a first layer 910 of the architectural construct is tubular and has a diameter greater than a second layer 920 of the architectural construct, and the second layer 620 is positioned within the first layer 910. An architectural construct consisting of concentric tubes can be formed in any of several suitable ways. One method, which is discussed generally in U.S. Pat. No. 6,503,584, is to dehydrogenate a gas (e.g., a hydrocarbon) within a frame to form the first layer 910 of the architectural construct 900, and to dehydrogenate a substance (e.g., titanium hydride) to form spacers on the inside surface of the first layer before dehydrogenating the gas to form the second layer 920 on the spacers. Subsequent layers can then be deposited in a similar fashion. In some implementations, each tubular layer is formed by dehydrogenating a gas in its own frame. The dehydrogenated layers are then configured within each other in the configuration shown in FIG. 9. Spacers can be deposited on either the inside or outside surfaces of the layers to space them apart by a particular distance.
One feature of the representative architectural constructs described above with reference to FIGS. 4-9 is that they can be formed using the carbon or other material resulting from dissociating a hydrogen donor molecule into products used for a hydrogen-based fuel. Accordingly, the process of forming the architectural constructs can be performed alongside and/or otherwise in conjunction with forming the hydrogen-based fuels. As described above with reference to FIG. 2, the architectural construct can be used to form components of a reactor that is in turn used to form more architectural constructs and hydrogen fuel. Other embodiments include other synergistic combinations of architectural constructs and hydrogen-based fuels. For example, carbon-based constructs including graphene can be packed with hydrogen (via adsorptive forces) and then formed into a powder that has a greater concentration of hydrogen atoms per unit volume than liquid hydrogen, and is simpler and more convenient to store. In another example, the hydrogen donor can include diesel fuel, and in the reaction, hydrogen that was previously dissociated from a hydrogen donor (diesel fuel or otherwise) can be added to the dissociation reaction to facilitate the dissociation reaction.
From the foregoing, it will appreciated that specific embodiments of the technology have been described herein for purposes of illustration, but that various modifications may be made without deviating from the technology. For example, certain embodiments of the processes described above were described in the context of methane. In other embodiments, other hydrocarbon fuels or non-carbon-containing hydrogen donors can undergo similar processes to form hydrogen-based fuels and architectural constructs. Other embodiments can use waste heat from sources other than combustion engines and/or can recycle heat internally or between sub-processes in manners other than those expressly described above.
Certain aspects of the technology described in the context of particular embodiments may be combined or eliminated in other embodiments. For example, certain embodiments were described above in the context of using waste heat as a source of energy for a dissociation process, as well as internal heat exchangers to conserve heat. In other embodiments, either one of the foregoing arrangements can be used individually. Further while advantages associated with certain embodiments of the technology have been described in the context of those embodiments, other embodiments may also exhibit such advantages, and not all embodiments need necessarily exhibit such advantages to fall within the scope of the present disclosure. Accordingly, the present disclosure and associated technology can encompass other embodiments not expressly shown or described herein.
To the extent not previously incorporated herein by reference, the present application incorporates by reference in their entirety the subject matter of each of the following materials: U.S. patent application Ser. No. 12/857,553, filed on Aug. 16, 2010 and titled SUSTAINABLE ECONOMIC DEVELOPMENT THROUGH INTEGRATED PRODUCTION OF RENEWABLE ENERGY, MATERIALS RESOURCES, AND NUTRIENT REGIMES; U.S. patent application Ser. No. 12/857,553, filed on Aug. 16, 2010 and titled SYSTEMS AND METHODS FOR SUSTAINABLE ECONOMIC DEVELOPMENT THROUGH INTEGRATED FULL SPECTRUM PRODUCTION OF RENEWABLE ENERGY; U.S. patent application Ser. No. 12/857,554, filed on Aug. 16, 2010 and titled SYSTEMS AND METHODS FOR SUSTAINABLE ECONOMIC DEVELOPMENT THROUGH INTEGRATED FULL SPECTRUM PRODUCTION OF RENEWABLE MATERIAL RESOURCES USING SOLAR THERMAL; U.S. patent application Ser. No. 12/857,502, filed on Aug. 16, 2010 and titled ENERGY SYSTEM FOR DWELLING SUPPORT; Ser. No. 13/027,235, filed on Feb. 14, 2011 and titled DELIVERY SYSTEMS WITH IN-LINE SELECTIVE EXTRACTION DEVICES AND ASSOCIATED METHODS OF OPERATION; U.S. Patent Application No. 61/401,699, filed on Aug. 16, 2010 and titled COMPREHENSIVE COST MODELING OF AUTOGENOUS SYSTEMS AND PROCESSES FOR THE PRODUCTION OF ENERGY, MATERIAL RESOURCES AND NUTRIENT REGIMES; Ser. No. 13/026,996, filed on Feb. 14, 2011 and titled REACTOR VESSELS WITH TRANSMISSIVE SURFACES FOR PRODUCING HYDROGEN-BASED FUELS AND STRUCTURAL ELEMENTS, AND ASSOCIATED SYSTEMS AND METHODS; Ser. No. 13/027,015, filed on Feb. 14, 2011 and titled CHEMICAL REACTORS WITH RE-RADIATING SURFACES AND ASSOCIATED SYSTEMS AND METHODS; Ser. No. 13/027,244, filed on Feb. 14, 2011 and titled THERMAL TRANSFER DEVICE AND ASSOCIATED SYSTEMS AND METHODS; Ser. No. 13/026,990, filed on Feb. 14, 2011 and titled CHEMICAL REACTORS WITH ANNULARLY POSITIONED DELIVERY AND REMOVAL DEVICES, AND ASSOCIATED SYSTEMS AND METHODS; Ser. No. 13/027,181, filed on Feb. 14, 2011 and titled REACTORS FOR CONDUCTING THERMOCHEMICAL PROCESSES WITH SOLAR HEAT INPUT, AND ASSOCIATED SYSTEMS AND METHODS; Ser. No. 13/027,215, filed on Feb. 14, 2011 and titled INDUCTION FOR THERMOCHEMICAL PROCESS, AND ASSOCIATED SYSTEMS AND METHODS; Ser. No. 13/027,198, filed on Feb. 14, 2011 and titled COUPLED THERMOCHEMICAL REACTORS AND ENGINES, AND ASSOCIATED SYSTEMS AND METHODS; U.S. Patent Application No. 61/385,508, filed on Sep. 22, 2010 and titled REDUCING AND HARVESTING DRAG ENERGY ON MOBILE ENGINES USING THERMAL CHEMICAL REGENERATION; Ser. No. 13/027,606, filed on Feb. 14, 2011 and titled REACTOR VESSELS WITH PRESSURE AND HEAT TRANSFER FEATURES FOR PRODUCING HYDROGEN-BASED FUELS AND STRUCTURAL ELEMENTS, AND ASSOCIATED SYSTEMS AND METHODS; Ser. No. 13/027,214, filed on Feb. 14, 2011 and titled ARCHITECTURAL CONSTRUCT HAVING FOR EXAMPLE A PLURALITY OF ARCHITECTURAL CRYSTALS; U.S. patent application Ser. No. 12/806,634, filed on Aug. 16, 2010 and titled METHODS AND APPARATUSES FOR DETECTION OF PROPERTIES OF FLUID CONVEYANCE SYSTEMS; Ser. No. 13/027,188, filed on Feb. 14, 2011 and titled METHODS, DEVICES, AND SYSTEMS FOR DETECTING PROPERTIES OF TARGET SAMPLES; Ser. No. 13/027,068, filed on Feb. 14, 2011 and titled SYSTEM FOR PROCESSING BIOMASS INTO HYDROCARBONS, ALCOHOL VAPORS, HYDROGEN, CARBON, ETC.; Ser. No. 13/027,195, filed on Feb. 14, 2011 and titled CARBON RECYCLING AND REINVESTMENT USING THERMOCHEMICAL REGENERATION; Ser. No. 13/027,195, filed on Feb. 14, 2011 and titled OXYGENATED FUEL; U.S. Patent Application No. 61/237,419, filed on Aug. 27, 2009 and titled CARBON SEQUESTRATION; U.S. Patent Application No. 61/237,425, filed on Aug. 27, 2009 and titled OXYGENATED FUEL PRODUCTION; Ser. No. 13/027,197, filed on Feb. 14, 2011 and titled MULTI-PURPOSE RENEWABLE FUEL FOR ISOLATING CONTAMINANTS AND STORING ENERGY; U.S. Patent Application No. 61/421,189, filed on Dec. 8, 2010 and titled LIQUID FUELS FROM HYDROGEN, OXIDES OF CARBON, AND/OR NITROGEN; AND PRODUCTION OF CARBON FOR MANUFACTURING DURABLE GOODS; and Ser. No. 13/027,185, filed on Feb. 14, 2011 and titled ENGINEERED FUEL STORAGE, RESPECIATION AND TRANSPORT.
1. A method for processing a hydrogen donor, comprising:
dissociating a hydrogen donor into dissociation products by adding energy to the hydrogen donor in a reactor vessel, wherein the energy includes waste heat generated by a combustion process carried out in a combustion chamber; and
(a) a structural building block based on at least one member selected from the group consisting of carbon, nitrogen, boron, silicon, sulfur and a transition metal; and
2. The method of claim 1, further comprising supplementing the waste heat with heat obtained from a sustainable, renewable energy source.
3. The method of claim 2 wherein supplementing the waste heat includes supplementing the waste heat with solar energy.
4. The method of claim 1 wherein the hydrogen donor has a first energy and the hydrogen-based fuel has a second energy greater than the first.
5. The method of claim 4 wherein the first energy includes a first dissociation energy and wherein the second energy includes a second dissociation energy.
6. The method of claim 1, further comprising forming the structural building block and the hydrogen-based fuel from the dissociation products.
7. The method of claim 1, further comprising forming an architectural construct from the structural building block.
8. The method of claim 7 wherein forming the architectural construct includes forming a graphene construct from dissociated carbon, and wherein the process further comprises:
adsorbing hydrogen to the graphene construct;
releasing the hydrogen from the graphene construct; and
combusting the hydrogen to provide energy for a subsequent process of dissociating a hydrogen donor into dissociation products.
9. The method of claim 1 wherein the hydrogen donor includes ammonia.
10. The method of claim 1 wherein the hydrogen donor includes a hydrocarbon.
11. The method of claim 1, further comprising adding steam to the hydrogen donor.
12. The method of claim 1 wherein dissociating a hydrogen donor includes,
dissociating a first hydrogen donor mass into first dissociation products;
from the first dissociation products, providing:
(a) the structural building block based on at least one member selected from the group consisting of carbon, nitrogen, boron, silicon, sulfur and a transition metal; and
(b) the hydrogen-based fuel; and wherein the method further comprises:
transferring heat from at least one component selected from the group consisting of the structural building block, the dissociation products, and the hydrogen-based fuel to a second hydrogen donor mass; and
dissociating the second hydrogen donor mass into second dissociation products.
13. The method of claim 12 wherein dissociating a first hydrogen donor mass includes dissociating a first hydrocarbon mass.
14. The method of claim 13 wherein dissociating a first hydrocarbon donor mass includes dissociating a first methane mass.
15. The method of claim 12 wherein the first hydrogen donor mass has a first dissociation energy and the hydrogen-based fuel has a second dissociation energy greater than the first.
16. The method of claim 12 wherein the first hydrogen donor mass includes a first mass of diesel fuel, and the second hydrogen donor mass includes a second mass of diesel fuel and wherein the method further comprises adding hydrogen obtained from dissociating the first mass of diesel fuel to the second mass of diesel fuel to aid in dissociating the second mass of diesel fuel.
17. A method for processing a hydrocarbon, comprising:
in a reactor vessel, dissociating a first hydrocarbon mass into first dissociation products by adding energy to the hydrocarbon mass, wherein the energy includes:
(a) waste heat generated by a combustion process carried out in a combustion chamber; and
(b) energy from a sustainable energy source, and wherein the first hydrocarbon mass has a first dissociation energy;
(a) a carbon-based structural building block; and
(b) a hydrogen-based fuel having a second dissociation energy greater than the first dissociation energy;
transferring heat from at least one component selected from the group consisting of the structural building block, the hydrogen-based fuel, and the dissociation products to a second hydrocarbon mass; and
dissociating the second hydrocarbon mass into second dissociation products.
dissociating a first hydrocarbon mass includes dissociating a first mass of methane;
dissociating a second hydrocarbon mass includes dissociating a second mass of methane; and
providing a hydrogen-based fuel includes providing hydrogen released by dissociating the first mass of methane; and wherein the method further comprises
forming graphene from carbon released by dissociating the first mass of methane.
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