The Sabatier reaction or Sabatier process involves the reaction of hydrogen with carbon dioxide at elevated temperatures (optimal 300-400 °C) and pressures in the presence of a nickel catalyst to produce methane and water. Optionally ruthenium on alumina (aluminum oxide) makes a more efficient catalyst. It is described by the following reaction:
- CO2 + 4H2 → CH4 + 2H2O
It was discovered by the French chemist Paul Sabatier.
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“The excessive increase of anything often causes a reaction in the opposite direction.”
—Plato (c. 427–347 B.C.)