Fuel Cell System Design

Operating Principle

Fuel cell systems have three main sections:

1. The fuel processing section, is where a steam reformer and a shift converter or reactor, are used to convert fuel into the hydrogen-rich gas required to sustain an electrochemical reaction in the power section. The steam reformer converts the fuel gas (e.g., methane) to hydrogen (H2) and carbon monoxide (CO) over a nickel catalyst by the reaction:

In some fuel cell systems, in the reactor, the CO is reacted with steam over an iron-chrome catalyst at a lower temperature to produce more hydrogen and reduce the CO content to less than 1 ppm:

Guide to Alternative Fuels

Guide to Alternative Fuels

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