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  4. The effect of catalysts of CO concentration on the methanol reformer for PEMFC
 
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The effect of catalysts of CO concentration on the methanol reformer for PEMFC

Date Issued
2006
Date
2006
Author(s)
Chen, Yan-Yi
DOI
zh-TW
URI
http://ntur.lib.ntu.edu.tw//handle/246246/61542
Abstract
With the advantages of zero pollution, high efficiency, low noise, low vibration, fast start, and long life, fuel cell converts the chemical energy within the fossil fuel directly to electrical energy without combustion. There are several different kinds of fuel cells. Among them, proton exchange membrane fuel cells (PEMFCs) with the advantages of low temperature of reaction and high density of energy, has drawn the most attention recently.It is essential to make hydrogen supplying units in order to apply PEMFC.We developed a small methanol reformer with using the CuO-ZnO-Al2O3 catalysts.The catalyst was able to process a methanol water mixture into a hydrogen-rich steam composed of 70.43% H2, 29.04%CO2, and 0.53% CO on a dry basis. It has been demonstrated that even traces of CO present in the hydrogen rich feed gas to proton exchange membrane fuel cells can poison the platinum anode electrode and reduce the power output.The tolerable level of CO is around 10ppm.We present the results of selective CO oxidation in reformate gas over single-step sol-gel prepared Pt/alumina, Ru/alumina, Ru-Fe/alumina and Ru-Co/alumina catalysts.The effect of CO and oxygen concentrations, temperature, Pt loading, and Ru loading on the activity are presented.Our results shows that a 5% Pt/alumina sol-gel catalyst can selective oxidize CO down to 10 ppm.
Subjects
甲醇重組器
優先氧化法
methanol reformer
preferential oxidation
Type
thesis
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