Methanation, the hydrogenation of carbon oxides to methane. has been the subject of a large number of catalytic studies during the past 70 years. In the earliest work. that of Sabatier and Senderens [l]. nickel was found to be a very efficient catalyst. Nickel is still the material of choice in most investigations of methanation, although ruthenium, cobalt, and iron are also active.
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Mills et al. (1974) studied this question.