The PEMFC-integrated CO oxidation - a novel method of simplifying the fuel cell plant

被引：70

作者：

Rohland, B ^{[1
]}

Plzak, V ^{[1
]}

机构：

[1] ZSW, Ctr Solar Energy & Hydrogen Res Baden Wurttemberg, Dept Electrochem Hydrogen Technol, D-89081 Ulm, Germany

来源：

JOURNAL OF POWER SOURCES | 1999年 / 84卷 / 02期

关键词：

fuel cell; PEMFC; H-2-cleaning; catalyst; PROX; CO;

D O I：

10.1016/S0378-7753(99)00315-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Natural gas and methanol are the most economical fuels for residential fuel cell power generators as well as for mobile PEM-fuel cells. However, they have to be reformed with steam into hydrogen, which is to be cleaned from CO by shift-reaction and by partial oxidation to a level of no more than 30 ppm CO. This level is set by the Pt/Ru-C-anode of the PEMFC. A higher partial oxidation reaction rate for CO than those of Pt/Ru-C can be achieved in an oxidic An-catalyst system. In the Fe2O3-Au system, a reaction rate of 2.10(-3) mol CO/s g An at 1000 ppm CO and 5% "air bleed" at 80 degrees C is achieved. This high rate allows to construct a catalyst-sheet for each cell within a PEMFC-stack. Practical and theoretical current/voltage characteristics of PEMFCs with catalyst-sheet are presented at 1000 ppm CO in hydrogen with 5% "air bleed". This gives the possibility of simplifying the gas processor of the plant. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：183 / 186

页数：4