Two methods for using hydrogen-doped natural gas in fuel cells are introduced.Applica-tions of hydrogen-doped natural gas in fuel cells in-clude direct supply of feed gas and separation of hydro-gen as fuel.The direct supply of raw gas is suitable for solid oxide fuel cell(SOFC)system.Hydrogen-doped natural gas is used as the feed gas for SOFC system,the SOFC system not only shows good stability,but also im-proves the total efficiency of cogeneration.The proton exchange membrane fuel cell(PEMFC)system,which separates hydrogen gas as fuel,can obtain hydrogen gas with purity that meets the requirements of PEMFC based on a combination of membrane separation and pressure swing adsorption processes.
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