An Experimental Study of the Performance on Reformer of Fuel Cell and Effect of Catalysts
Date Issued
2005
Date
2005
Author(s)
Chou, Chung-Yang
DOI
zh-TW
Abstract
Full 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, PEMFC with the advantages of low temperature of reaction and high density of energy, and can satisfy the requirements for the power supply of a portable electronics, has drawn the most attention recently.
Though the reforming process, a methanol could be converted into a hydrogen-rich gas for PEMFC. In this research, a heat exchanger has been designed to make the heat transfer from hydrogen-rich gas to methanol solution and take the place of condenser and evaporator. Effects of experimental parameters of the design methanol reformer, such as reacting temperature, methanol feeding rate, steam-to-methanol mole ratio (S/C) , kinds of catalysts, cell per square inch of catalyst supports and length of catalyst supports, are investigated and the performance of the methanol reformer is evaluated.
The experimental results show that the methanol conversion and hydrogen yield increase with reacting temperature and cell per square inch of catalyst supports. When the steam-to-methanol mole ratio is set at 1.18, reacting temperature 320℃, the maximum of methanol conversion rate obtained 83％, and when the steam-to-methanol mole ratio is set at 1.9, the maximum of methanol conversion rate only obtained 42％. The methanol conversion increase with methanol feeding rate, decrease with hydrogen yield.
The experimental results also show that the methanol conversion increase obviously with the length of catalyst supports. It has been discovered that the optimal conversion rate which occurs when the length of catalyst supports is set at 105 mm is 94％ and the hydrogen yield is around 0.19 mole/min.
Subjects
燃料電池
重組器
蒸汽重組
觸媒
熱交換器
fuel cell
reformer
steam reforming
catalysts
heat exchanger
Type
thesis
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