Patent DE-102009055617-A1 (DE)
Title: Process for integrated pre-combustion of carbon dioxide separation in steam injected gas turbine process, comprises producing a water gas from fuel used first in an auto thermal steam gasification and transforming the carbon monoxide
Inventor: KIRCHNER HANS WALTER
IPC: C01B3/02
Filed: 2009-11-25
Abstract: The process for integrated pre-combustion of carbon dioxide separation in steam injected gas turbine process, comprises producing a water gas from fuel (3) used first in an autothermal steam gasification that exists as carbon monoxide, carbon dioxide, nitrogen gas and hydrogen gas, transforming the carbon monoxide existing in the water steam gasification under further supplement of water steam in a water gas-shift-reaction into carbon dioxide and hydrogen gas, and producing a synthesis gas (9) through the water gas-shift-reaction. The process for integrated pre-combustion of carbon dioxide separation in steam injected gas turbine process, comprises producing a water gas from fuel (3) used first in an autothermal steam gasification that exists as carbon monoxide, carbon dioxide, nitrogen gas and hydrogen gas, transforming the carbon monoxide existing in the water steam gasification under further supplement of water steam in a water gas-shift-reaction into carbon dioxide and hydrogen gas, producing a synthesis gas (9) through the water gas-shift-reaction, where the synthesis gas consists of carbon dioxide, nitrogen gas and hydrogen gas, supplying the latent heat of the hot water gas and the hot synthesis gas to the carburetor, and separating the carbon dioxide from the synthesis gas by any method, where the fuel gas consists of nitrogen- and hydrogen gas after the carbon dioxide separation. The fuel gas is burned in the combustion chamber of the gas turbine under the addition of water vapor with air. The working gas in the gas turbine consists of nitrogen and water vapor. The waste heat from the gas turbine in a waste heat boiler is used to generate the process steam for the process. The process steam in the waste heat boiler is produced at a high pressure level, and the process steam is first expanded prior to enter the process in a high-pressure steam turbine. The waste heat upcoming towards the waste heat boiler is used in a condensing heat exchanger (4), a low-pressure steam turbine cycle for power generation, organic-Rankin-cycle for power generation or Kalina process for power generation and is transferred to a heat supply network. The separation of carbon dioxide from the synthesis gas is carried out by means of a physical washing. The solution absorbed carbon dioxide is released into a desorber under supply of heat. The released carbon dioxide is cooled and is highly condensed for further transporting in a carbon dioxide reservoir. The weak solution is cooled after desorption and is used for washing carbon dioxide. The latent heat of the carbon dioxide after the compression of the transport pressure is used for heating the desorber. The heat transporting is carried out in a closed circuit with the help of a thermal fluid between the heat recovery from the compressed carbon dioxide and desorber heating. Independent claims are included for (1) a method for separating labeled carbon dioxide from synthesis gas; (2) a device for separating labeled carbon dioxide from synthesis gas; and (3) a device for combined steam gasification and shift reaction.