| http://www.w3.org/ns/prov#value | - Moreover, at each temperature increase, the sulfur dioxide content temporarily increases, probably as a result of the oxidation of cobalt (or nickel) and molybdenum sulfides present in the catalyst.It has also been found that the presence of CO.sub.2 in the gas to be treated did not result in methanation and that the higher hydrocarbons such as ethane, propane and butan
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