Search query: metamaterial　CO2　capture

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abstract: This paper presents a miniaturized gas sensing platform for rapid and ultrasensitive optical detection of methane gas by integrating the state of the art complementary metal oxide semiconductor compatible meta material absorber with a smart, porous metal organic framework (MOF) The implementation of methane gas detection relies on the integration between meta materials and MOF, where MOF functions as a gas trap to capture more gas into the meta material absorber. We have experimentally demonstrated an approximately 1,000 fold sensitivity enhancement by using this method. Furthermore, the investigation of the geometry dependent characteristics provides a way to further expand the scope of application, such as CO2, CO and SO2, etc.
author_names: Hong Zhou

Dongxiao Li

Xindan Hui

Donglin Hu

Xiaolei Chen

Xianming He

Xiaojing Mu
title: Metamaterial Gas Sensing Platform Based on Surface Enhanced Infrared Absorption
venue: 2020 IEEE 33rd International Conference on Micro Electro Mechanical Systems (MEMS)
year: 2020

abstract: The presence of an excessive concentration of CO2 in the atmosphere needs to be curbed with suitable measures including the reduction of CO2 emissions at stationary point sources such as power plants through carbon capture technologies and subsequent conversion of the captured CO2 into non polluting clean fuels/chemicals using photo and/or electrocatalytic pathways. Porous materials have attracted much attention for carbon capture and in the recent past; they have witnessed significant advancements in their design and implementation for CO2 capture and conversion. In this context, the emerging trends in major porous adsorbents such as MOFs, zeolites, POPs, porous carbons, and mesoporous materials for CO2 capture and conversion are discussed. Their surface texture and chemistry, and the influence of various other features on their efficiency, selectivity, and recyclability for CO2 capture and conversion are explained and compared thoroughly. The scientific and technical advances on the material structure versus CO2 capture and conversion provide deep insights into designing effective porous materials. The review concludes with a summary, which compiles the key challenges in the field, current trends and critical challenges in the development of porous materials, and future research directions combined with possible solutions for realising the deployment of porous materials in CO2 capture and conversion.
author_names: Gurwinder Singh

Jangmee Lee

Ajay S Karakoti

Rohan Bahadur

Jiabao Yi

Dongyuan Zhao

Khalid Albahily

Ajayan Vinu
title: Emerging trends in porous materials for CO2 capture and conversion.
venue: Chemical Society reviews
year: 2020

abstract: Abstract CO2 direct air capture (DAC) has been increasingly discussed as a climate change mitigation option. Despite technical advances in the past decade, there are still misconceptions about DAC's current and long term costs as well as energy, water and area demands. This could undermine DAC's anticipated role in a neutral or negative greenhouse gas emission energy system, and influence policy makers. In this study, a literature review and techno economic analyses of state of the art DAC technologies are performed, wherein, DAC technologies are categorised as high temperature aqueous solutions (HT DAC) and low temperature solid sorbent (LT DAC) systems, from an energy system perspective. DAC capital expenditures, energy demands and costs have been estimated under two scenarios for DAC capacities and financial learning rates in the period 2020 to 2050. DAC system costs could be lowered significantly with commercialisation in the 2020s followed by massive implementation in the 2040s and 2050s, making them cost competitive with point source carbon capture and an affordable climate change mitigation solution. It is concluded that LT DAC systems are favourable due to lower heat supply costs and the possibility of using waste heat from other systems. CO2 capture costs of LT DAC systems powered by hybrid PV Wind battery systems for Moroccan conditions and based on a conservative scenario, without/with utilisation of free waste heat are calculated at 222/133, 105/60, 69/40 and 54/32 EUR/tCO2 in 2020, 2030, 2040 and 2050, respectively. These new findings could enhance DAC's role in a successful climate change mitigation strategy.
author_names: Mahdi Fasihi

O V Efimova

Christian Breyer
title: Techno economic assessment of CO2 direct air capture plants
venue: Journal of Cleaner Production
year: 2019

abstract: Abstract The quest for producing cost effective and efficient adsorbents for CO2 capture has received enormous attention in recent times. Biomass derived porous carbons are considered to be the most preferred adsorbent materials for CO2 capture owing to their excellent textural properties, tunable porosity and low cost. Different type of activation processes including solid state activation possess generate appropriate morphology and other physico chemical properties in these materials which enable them to act as effective adsorbents for CO2 capture. In this review, the key scientific results from published literature have been consolidated and critical commentary has been provided to give a broad insight into the production of biochar and activated porous carbons and their application in CO2 capture. A thorough review of the mechanism of pyrolysis for cellulose, hemicellulose and lignin has been presented in detail. The ability of different activating agents to produce activated porous carbons has been discussed. A summary of the application of biochar and activated porous carbons for CO2 capture has been included. The review concludes with an overview of future outlook and potential research direction that could be undertaken for advancing the utilization of biomass derived porous carbon materials for applications including CO2 capture and energy storage.
author_names: Gurwinder Singh

Kripal Singh Lakhi

S Sil

Sheshanath V Bhosale

Khalid Al-Bahily

Ajayan Vinu
title: Biomass derived porous carbon for CO2 capture
venue: Carbon
year: 2019

abstract: Abstract Utilization is one of the prominent strategies for the management of hazardous industrial wastes like fly ash. As fossil based power is expected to remain a major source of global electricity supply in the coming years, the absence of effective management strategies will exacerbate the problem of fly ash waste in the environment. Global fly ash utilization rates remain low due to limited utilization opportunities outside the construction industry. This necessitates the development of new pathways for its utilization as a means of diverting it from landfills where it poses a significant threat to the environment. Carbon capture, utilization, and storage presents opportunities to utilize fly ash in various ways; as a capture material, as a medium for permanent CO2 storage via mineralization, and as a catalyst or catalyst support for CO2 utilization processes. This study reviews the different technologies through which fly ash and materials derived from fly ash are applied in the CO2 capture, utilization, and storage technology while highlighting some challenges and opportunities for further research and development.
author_names: Abdallah Dindi

Dang Viet Quang

Lourdes F Vega

Enas Nashef

Mohammad R M Abu-Zahra
title: Applications of fly ash for CO2 capture, utilization, and storage
year: 2019

abstract: CO2 capture, utilization and storage has been recognized as a primary option to mitigate the issue of climate change caused by the utilization of fossil fuels. Several CO2 capture strategies have b
author_names: Chunfeng Song

Qingling Liu

Shuai Deng

Hailong Li

Yutaka Kitamura
title: Cryogenic based CO2 capture technologies: State of the art developments and current challenges
venue: Renewable and Sustainable Energy Reviews
year: 2019

abstract: Abstract Carbon Capture and Storage is regarded as an important component in a portfolio of low carbon energy technologies for mitigating climate change. Absorption technologies are presently the most available and effective approach for post combustion CO2 capture. However, state of the art amine based absorption technologies incur intensive energy use, as high as 3 times the thermodynamic minimum, thus resulting in prohibitively high costs. Solvents are key to the performance of absorption technologies. Recently, a new class of solvents, phase change solvents, have attracted growing interest due to their potential to substantially reduce energy use for CO2 capture. Phase change solvents are homogeneous (single phase) solvents under normal conditions, but undergo a phase transition into a heterogenic (two phase) system, triggered by changes in polarity, hydrophilicity, ionic strength, or hydrogen bond strength to form a CO2 lean liquid phase and a CO2 enriched liquid or solid phase. This review paper first examines different mechanisms that trigger phase separations in solvents. A comprehensive list of phase change solvents reported in the recent literature, including those subject to chemically or thermally triggered phase changes, non aqueous or aqueous systems, and those forming either a CO2 enriched solid or a liquid phase are provided and their physiochemical properties for CO2 capture are discussed. Enabled by phase change solvents, different variants of CO2 absorption processes have been developed and tested in laboratory or pilot scales over the past ten years. The status of such emerging processes is summarized and their advantages and challenges for post combustion CO2 capture are reviewed and commented. Solvent properties such as CO2 loading capacity, lean and rich phase partition, desorption pressure, absorption kinetics, viscosity, stability, and volatility are critical for both CO2 capture performance and scalability. Gaps between state of the art and ideal solvents are analyzed, and insights into the research needs such as solvent structure property performance relations, computational solvent design, ideal vapor liquid equilibrium behavior, and integration of capture processes with post combustion emission sources are provided.
author_names: Shihan Zhang

Yao Shen

Lidong Wang

Jianmeng Chen

Yongqi Lu
title: Phase change solvents for post combustion CO2 capture: Principle, advances, and challenges
venue: Applied Energy
year: 2019

abstract: Abstract Dramatic increase of CO2 emissions to sate the global carbon demand for chemicals, goods, and fuels has been regarded as one of the main contributors triggering global warming. Note that CO2 emissions are over the Earth's full capacity to assimilate carbons via the natural carbon cycle. In these respects, CO2 capture and sequestration have been considered as one of the strategic principles to cancel out CO2 release from the anthropogenic activities in line with the use of fossil fuels. Thus, it is desirable to develop the efficient CO2 sorptive materials that are economically viable. Among CO2 sorptive materials, biochar (i.e. porous carbon based materials) has been considered as one of the promising candidates. Indeed, a great deal of researches on biomass has been performed. Based on these rationales, this review laid great emphasis on informing the recent studies of activated biochars for CO2 adsorption, which were fabricated from various biomasses. Also, this review offered the up to date knowledge on the physicochemical properties of activated biochars in line with their synthesis procedures. Lastly, the effects of biochar properties on CO2 capture and separation was summarized with in depth assessment of the activated biochars.
author_names: Sungyup Jung

Young-Kwon Park

Eilhann E Kwon
title: Strategic use of biochar for CO2 capture and sequestration
venue: Journal of CO2 Utilization
year: 2019

abstract: Abstract Calcium looping is regarded as an effective and viable way to address CO2 emissions. To overcome the loss in capacity problems of calcium based sorbents with the number of calcium looping cycles, a novel CaO/Ca12Al14O33 sorbent with a microtube like structure was prepared from carbide slag and Al(NO3)3*9H2O using paper fibre as a biotemplate. The CO2 capture performance and microstructure of the novel synthetic sorbent under calcium looping conditions were investigated. The results show that the utilization of the biotemplate is good to retain the high cyclic CO2 capture reactivity of the synthetic sorbent. Due to the unique hollow porous structure, the CO2 capture capacity of the synthetic sorbent containing 7.5 wt% Al2O3 retains 0.56 and 0.33 g/g after 30 cycles under mild and severe calcination conditions, respectively, which are 2.56 and 2.11 times higher than those of carbide slag under the same respective calcination conditions. With the presence of 10% steam in the carbonation atmosphere, the CO2 capture capacity of the synthetic sorbent retains 0.55 g/g under the severe calcination conditions after 10 cycles. The native hierarchical biostructure of paper fibre is preserved in the synthetic sorbent. CaO and Ca12Al14O33 are uniformly distributed in the synthetic sorbent, resulting in a high sintering resistance during multiple CO2 capture cycles. CO2 can penetrate through the microtube like structure of the synthetic sorbent from two directions, i.e. from the outer surface and inner surface. This phenomenon effectively enlarges the contact area between CO2 and CaO. The CaO/Ca12Al14O33 sorbent with a hollow porous structure by means of a biotemplate appears promising in the calcium looping technology for CO2 capture.
author_names: Xiaotong Ma

Yingjie Li

Xianyao Yan

Wan Zhang

Jianli Zhao

Zeyan Wang
title: Preparation of a morph genetic CaO based sorbent using paper fibre as a biotemplate for enhanced CO2 capture
venue: Chemical Engineering Journal
year: 2019

abstract: Abstract It is urgent to reduce the emission of carbon dioxide (CO2) into the atmosphere and thereby mitigate climate changes. To implement the industrial scenario of carbon capture and storage (CCS) there is a great need for the discovery or development of excellent solid CO2 sorbents with technological and economic feasibility. Lithium orthosilicate (Li4SiO4) has been identified as one of the most promising candidates for CO2 capture at high temperatures and has drawn worldwide research interests. In the last years, focusing on the ultimate goal of achieving a Li4SiO4 sorbent with excellent physicochemical performance for various industrial applications, extensive works have been conducted, including exploring suitable preparation methods, modeling analysis, various modifications for performance enhancement, optimization of operation conditions, granulation and their applications. This work summarizes the state of the art researches in the literature aiming at developments of Li4SiO4 sorbents for high temperature CO2 capture. The potential new development trends are also discussed in the current work.
author_names: Yingchao Hu

Wenqiang Liu

Yuandong Yang

Mingyu Qu

Hailong Li
title: CO2 capture by Li4SiO4 sorbents and their applications: Current developments and new trends
venue: Chemical Engineering Journal
year: 2019