Pt surface kinetics for a PrOx reactor for fuel cell feedstream processing

被引：10

作者：

Bissett, EJ ^{[1
]}

Oh, SH ^{[1
]}

Sinkevitch, RM ^{[1
]}

机构：

[1] GM Corp, Ctr Res & Dev, Warren, MI 48090 USA

来源：

CHEMICAL ENGINEERING SCIENCE | 2005年 / 60卷 / 17期

关键词：

fuel cell; fuel processing; PrOx; kinetics; preferential oxidation; selective CO oxidation; Pt catalyst;

D O I：

10.1016/j.ces.2005.02.069

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Rate expressions for the oxidation of carbon monoxide and hydrogen over a Pt catalyst are achieved using a combination of surface modeling and experimental measurements. The conditions studied are those expected within a preferential oxidation (PrOx) reactor in a fuel processor for a fuel cell stack. Convenient rate expressions for subsequent reactor modeling in a companion paper are derived from a set of elementary rate expressions using the approximation of near saturation of the catalyst surface by carbon monoxide and near partial equilibrium of adsorption/desorption of carbon monoxide and hydrogen. These rate expressions require only two Arrhenius kinetic parameters and satisfactorily represent our measured rates over the nearly three orders of magnitude variation in carbon monoxide and oxygen concentrations between 80 and 200 degrees C. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：4709 / 4721

页数：13

共 26 条

[1]

Aris Rutherford, 1975, The Mathematical Theory of Diffusion and Reaction in Permeable Catalysts: The Theory of the Steady State, V1

[2] KINETICS OF CO OXIDATION ON SINGLE-CRYSTAL PD, PT, AND IR [J].