Integrated power generation and carbon capture using fuel cells

a fuel cell and power generation technology, applied in the direction of fuel cells, electrochemical generators, electrical equipment, etc., can solve the problems of reducing the overall efficiency of the power generation process and the net reduction of the power generation efficiency per unit of fuel consumed, and achieve the effect of reducing the emissions of co2

Inactive Publication Date: 2014-09-18
EXXON RES & ENG CO
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  • Claims
  • Application Information

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Benefits of technology

[0009]In various aspects, methods are provided for using a combination of a combustion-powered power generation system with molten carbonate fuel cells to allow for power generation with reduced emissions of CO2.

Problems solved by technology

The energy required for CO2 separation reduces the overall efficiency of the power generation process.
However, conventional combinations of a combustion powered turbine or generator with fuel cells for carbon separation have resulted in a net reduction in power generation efficiency per unit of fuel consumed.

Method used

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  • Integrated power generation and carbon capture using fuel cells
  • Integrated power generation and carbon capture using fuel cells
  • Integrated power generation and carbon capture using fuel cells

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[0171]A series of simulations were performed in order to demonstrate the benefits of using an improved configuration for using a fuel cell for CO2 separation. The simulations were based on empirical models for the various components in the power generation system. The simulations were based on determining steady state conditions within a system based on mass balance and energy balance considerations.

[0172]For the combustion reaction for the turbine, the model included an expected combustion energy value and expected combustion products for each fuel component in the feed to the combustion zone (such as C1-C4 hydrocarbon, H2, and / or CO). This was used to determine the combustion exhaust composition. An initial reforming zone prior to the anode can be operated using an “idealized” reforming reaction to convert CH4 to H2. The anode reaction was modeled to also operate to perform further reforming during anode operation. It is noted that the empirical model for the anode did not require...

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Abstract

Systems and methods are provided for capturing CO2 from a combustion source using molten carbonate fuel cells (MCFCs). The fuel cells can be operated to have a reduced anode fuel utilization. Optionally, at least a portion of the anode exhaust can be recycled for use as a fuel for the combustion source. Optionally, a second portion of the anode exhaust can be recycled for use as part of an anode input stream. This can allow for a reduction in the amount of fuel cell area required for separating CO2 from the combustion source exhaust and/or modifications in how the fuel cells are operated.

Description

CROSS-REFERENCE TO RELATE APPLICATIONS[0001]This application claims the benefit of U.S. Application Ser. Nos. 61 / 788,628, 61 / 787,587, 61 / 787,697, and 61 / 787,879, each filed on Mar. 15, 2013; which are each incorporated by reference herein in their entirety, as well as the three U.S. non-provisional applications filed on even date herewith and also claiming priority to the four provisional applications enumerated above, each of which non-provisional applications also being incorporated by reference herein in their entirety.FIELD OF THE INVENTION[0002]In various aspects, the invention is related to low emission power production with separation and / or capture of resulting emissions via integration of molten carbonate fuel cells with a combustion power source.BACKGROUND OF THE INVENTION[0003]Capture of gases emitted from power plants is an area of increasing interest. Power plants based on the combustion of fossil fuels (such as petroleum, natural gas, or coal) generate carbon dioxide a...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01M8/06
CPCH01M8/0668H01M8/04097H01M8/0662H01M2008/147Y02E20/16Y02E60/50
Inventor BERLOWITZ, PAUL J.BARCKHOLTZ, TIMOTHY ANDREWHERSHKOWITZ, FRANKFALDI, ALESSANDRO
Owner EXXON RES & ENG CO
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