What is the difference between the various types of PEM fuel cells?

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What is the difference between the various types of PEM fuel cells?

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The differences in PEM fuel cells stem from how the hydrogen needed for the reaction is obtained. The hydrogen used in reformed hydrogen systems is obtained from methanol or a hydrocarbon such as methane or propane. The reason it is called reformed hydrogen is that the methanol or hydrocarbon is processed in a device known as a reformer to produce the hydrogen just upstream of the fuel cell. In a direct methanol fuel cell (DMFC) system, methanol is converted directly to hydrogen without the use of a reformer. Where are fuel cells used? Fuel cells have many applications today, and the list is growing fast. There are three basic market segments that fuel cells satisfy: • portable/battery substitution (laptops) • transportation (automobiles and buses) • distributed power. What is DuPont’s experience in fuel cells? From research to commercial product releases, DuPont has over 30 years of experience in fuel cell system development. We leverage high-level expertise in polymer chemistry, mate