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Cathode Combustion for Enhanced Fuel Cell Syngas Production

A fuel cell cathode, fuel cell technology, applied in fuel cells, battery electrodes, combined combustion mitigation, etc., can solve problems such as the electrical efficiency of fuel cells that are not described

Inactive Publication Date: 2018-03-23
EXXON RES & ENG CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The '183 publication does not appear to describe the electrical efficiency of the fuel cell independent of the system

Method used

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  • Cathode Combustion for Enhanced Fuel Cell Syngas Production
  • Cathode Combustion for Enhanced Fuel Cell Syngas Production
  • Cathode Combustion for Enhanced Fuel Cell Syngas Production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0138] Embodiment 1. A method of generating electricity comprising introducing an anode fuel stream comprising a reformable fuel into an anode of a molten carbonate fuel cell, an internal reforming element associated with the anode of the molten carbonate fuel cell or a combination thereof; will contain CO 2 , O 2 and a cathode inlet stream of one or more fuel compounds are introduced into the cathode of a molten carbonate fuel cell, wherein the one or more fuel compounds include H 2 , one or more carbon-containing fuel compounds or combinations thereof, the concentration of the one or more fuel compounds in the cathode inlet stream is at least about 0.01 volume percent, the concentration of the one or more fuel compounds in the cathode inlet stream is less than Autoignition concentration for operating conditions in fuel cell cathodes; electricity generation in molten carbonate fuel cells; generation containing H 2 , CO and CO 2 and producing an anode exhaust comprising at ...

Embodiment approach 2

[0139] Embodiment 2. The method of Embodiment 1, wherein the methylene equivalent volume percent of the one or more fuel compounds is at least about 0.02 volume percent.

Embodiment approach 3

[0140] Embodiment 3. The method of Embodiment 1 or 2, wherein the cathode of the molten carbonate fuel cell comprises an electrode surface and a second catalytic surface, the second catalytic surface comprising at least one Group VIII metal, and generating cathode exhaust comprises the step of At least a portion of the one or more fuel compounds are oxidized in the presence of two catalytic surfaces.

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PUM

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Abstract

Molten carbonate fuel cells operate with a cathode inlet stream containing a portion of the combustible gas, which may be hydrocarbons, hydrogen, or other gases that combine with oxygen to form heat on the catalytic surface of the cathode. The combustible gas may react in the cathode and / or in a section thermally integrated with the cathode. The heat generated by the combustion reaction in the cathode can be used, for example, to cause other endothermic reactions, such as reforming, to take place in the anode portion of the fuel cell, while still maintaining the desired temperature gradient across the fuel cell. Optionally, the cathode of the fuel cell can be modified to further enhance or control combustion within the cathode, for example by introducing additional catalytic surfaces in the cathode.

Description

field of invention [0001] In various aspects, the invention relates to methods of operating molten carbonate fuel cells. Background of the invention [0002] Molten carbonate fuel cells use hydrogen and / or other fuels to generate electricity. Hydrogen may be provided by reforming methane or other reformable fuels in a steam reformer upstream of or within the fuel cell. Reformable fuels may include hydrocarbonaceous materials that may react with steam and / or oxygen at elevated temperatures and / or pressures to produce gaseous products comprising hydrogen. Alternatively or additionally, the fuel may be reformed in the anode cell of a molten carbonate fuel cell which may be operated to create conditions suitable for reforming the fuel in the anode. Alternatively or additionally, reforming can be performed externally and internally to the fuel cell. [0003] Molten carbonate fuel cells have traditionally been operated to maximize the amount of electricity generated per unit of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/50H01M8/0612H01M8/0637H01M8/0668H01M4/86C01B3/38
CPCC01B3/38F01D13/00F02C3/22F02C6/00H01M8/0618H01M8/0625H01M8/0637H01M8/0668H01M8/145C01B2203/0233F05D2260/61F05D2260/611Y02E20/14Y02E20/16Y02P20/129Y02E60/50C01B3/50H01M4/8647C01B2203/1047C01B2203/0205H01M2008/147Y02P70/50
Inventor T·A·巴尔克霍尔兹P·J·贝洛维茨
Owner EXXON RES & ENG CO