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Fuel cell system

A fuel cell and fuel technology, applied in the direction of fuel cells, solid electrolyte fuel cells, circuits, etc., can solve the problem of overcooling of fuel cell stacks, achieve the effect of reducing carbon deposition and low price

Inactive Publication Date: 2002-09-18
CHAOZHOU THREE CIRCLE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the endothermic nature of the methane steam reforming reaction, too much methane in the fuel stream will cause the fuel cell stack to overcool

Method used

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  • Fuel cell system
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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0042] Propane was steam pre-reformed using a commercially available catalyst at two different maximum temperatures, 378°C and 328°C, at various S / C ratios using a steam pre-reforming process that produces a high content of methane. The catalyst was a nickel-based pre-reforming catalyst C11-PR supplied by United Catalysts Corporation. The measured conversions given in Table 3 show that they are at least close to those predicted by the thermodynamic calculations given above. Steam reforming is performed adiabatically in a microreactor system and the gas composition is analyzed online. Note that the experimental setup was not ideal and it is believed to indicate incomplete conversion. A total conversion of at least 97.5% is generally desired, and to ensure this, a suitable residence time on the catalyst is used. All percentages are % by volume, given on a dry basis.

[0043] temperature

example 2-4

[0045] A methane-enriched fuel oil product was further tested for internal reforming of LPG obtained from Victorian, Australia ("Victorian LPG") on SOFC anodes in a typical steam pre-reformer. The composition of Victorian LPG varies from 100% propane to a mixture of propane, butane and / or ethane. The LPG composition used in this work is 93% propane and 7% ethane.

[0046] The test was conducted in a typical fuel processor with 0.6 L of the aforementioned commercial pre-reforming catalyst C11-PR. Select operating conditions so that the methane content of the reformed gas is higher than that traditionally produced by propane and ethane pre-reforming, and remain on the catalyst for a sufficient time to achieve 100% propane and ethane transform. The experimental results are given below, together with the operating conditions. It should be noted that the results are given by the dry weight method.

example 2

[0048] Temperature: 353-380°C, steam / carbon = 1.5

[0049] CH 4 : 48.3

[0050] h 2 : 30.6

[0051] CO 2 : 21.1

[0052] CO: 0.0

[0053] C 3 h 8 : 0.0

[0054] C 2 h 6 : 0.0

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Abstract

A method for generating electricity in a fuel cell (14), which comprises combining high-grade carbon (C2+) hydrocarbon fuels with steam pre-reforming furnace (10) under the condition that the temperature in the pre-reforming furnace is not higher than 500°C The vapor reacts to produce a fuel stream comprising hydrogen and not less than about 20% methane by volume as measured by the wet method, and the fuel stream and oxidant are delivered to a high temperature fuel cell (14) where the methane is reformed, And electricity is generated by reacting the fuel stream at the anode of the fuel cell and the oxidant at the cathode of the fuel cell.

Description

technical field [0001] The present invention relates to a fuel cell, in particular to fuel supply to a fuel cell electric energy generating system. Background technique [0002] Fuel cells convert gaseous fuels (such as hydrogen, natural gas, and gaseous coal) directly into electricity through an electrochemical process. Fuel cells can continuously generate electricity when supplied with fuel and an oxidant (usually air). A typical fuel cell consists of an electrolyte (ionic conductor, H + , O 2- , CO 3 2- etc.) composition. When the battery is shorted by an external load, the fuel is oxidized at the anode, causing the release of electrons, which flow through the external load and reduce oxygen at the cathode. The charge flow in the external circuit is balanced by the ionic current in the electrolyte. As a result, oxygen from air or other oxidants is split at the cathode and converted to oxygen ions, which migrate through the electrolyte membrane and react with the fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/38H01M8/0612H01M8/12H01M8/124
CPCC01B3/38C01B2203/0233C01B2203/066C01B2203/0838C01B2203/1035C01B2203/1058C01B2203/1064C01B2203/1082C01B2203/1094C01B2203/1241C01B2203/1247C01B2203/142H01M8/0612H01M8/12H01M2008/1293H01M2300/0074Y02P20/129Y02E60/50
Inventor 卡尔·弗杰卡里克·阿麦德
Owner CHAOZHOU THREE CIRCLE GRP
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