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Sabatier Process

Named after its main investigator, Paul Sabatier, this Methanation process produces methane and water from hydrogen and carbon dioxide.

With the formula CO2 + 4H2 -- > CH4 +2H2O, this exothermic reaction occurs spontaneously in the presence of either nickel or ruthenium which act as catalysts.

This has been in use in industry for over a century, and forms the basis for the atmospheric fuel generators proposed for mars direct , and has also been suggested as a potential solution to the excess carbon dioxide emission involved with fossil fuel power generation.