| http://www.w3.org/ns/prov#value | - CH4 + ???O2 -> CO + 2H2 If a mixture of a hydrogen containing gas and a non-hydrocarbon carbon containing gas, such as carbon monoxide, is used as a fuel, then some of the carbon monoxide is converted to carbon dioxide in the fuel cell stack 110 and a gas mixture including carbon monoxide, carbon dioxide and unutilized hydrogen is provided from the fuel cell stack 110.
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