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...[power (physics)|power]] for locomotion. These vehicles generally use the hydrogen in one of two methods: [[combustion]] or [[fuel-cell]] conversion: * In combustion, the hydrogen is "burned" in engines in fundamentally the same method as traditional gaso

*''Reformate'', produced in a [[catalytic reformer]] with a high octane and high [[aromatic]]s content, and very low olefins ( ...and [[thiophene]]s. Some contaminants, in particular [[mercaptans]] and [[hydrogen sulfide]] must be removed because they cause corrosion in engines.