| http://www.w3.org/ns/prov#value | - The impurities which have to be removed from the gas mixtures containing carbon monoxide and hydrogen produced by gassification or cleavage of solid, liquid or gaseous fuels with water vapor and in some cases oxygen are carbon dioxide, hydrogen sulfide, organic sulfur compounds including carbon oxysulfide, methane in a few cases and even the carbon monoxide itself in the ca
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