Steady-state multiplicity in the autohumidification polymer electrolyte membrane fuel cell

被引：49

作者：

Moxley, JF ^{[1
]}

Tulyani, S ^{[1
]}

Benziger, JB ^{[1
]}

机构：

[1] Princeton Univ, Dept Chem Engn, Princeton, NJ 08544 USA

来源：

CHEMICAL ENGINEERING SCIENCE | 2003年 / 58卷 / 20期

关键词：

reaction engineering; transient response; multiphase reactors; nonlinear dynamics;

D O I：

10.1016/S0009-2509(03)00345-2

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Ignition/extinction phenomena and steady-state multiplicity were discovered in an autohumidification polymer electrolyte membrane fuel cell. At steady state, the water produced by the fuel cell reaction is balanced by water removal by the flowing reactant gas streams. Ignition, corresponding to a high fuel cell current, arises from positive feedback between the water produced by the reaction and the transport of protons in the membrane. A critical level of membrane hydration is required for ignition; insufficient membrane hydration will extinguish the fuel cell current. This new autocatalytic mechanism has an interesting analogy to the autothermal reactor. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：4705 / 4708

页数：4

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