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The Sabatier reaction or Sabatier process was discovered by the French chemist Paul Sabatier in the 1910s. It involves the reaction of hydrogen with carbon dioxide at elevated temperatures (optimally 300–400 °C) and pressures in the presence of a nickel catalyst to produce methane and water. Optionally, ruthenium on alumina (aluminium oxide) makes a more efficient catalyst. It is described by the following exothermic reaction: :CO2 + 4 H2 → CH4 + 2 H2O + energy :∆H = −165.0 kJ/mol :(some initial energy/heat is required to start the reaction) == Energy storage == (詳細は),〕〔''scénario négaWatt 2011 (France)'', (),〕 In contrast to a direct usage of hydrogen for transport or energy storage applications,〔 〕 the methane can be injected into the existing gas network, which in many countries has one or two years of gas storage capacity. The methane can then be used on demand to generate electricity (and heat—combined heat and power) overcoming low points of renewable energy production. The process is electrolysis of water by electricity to create hydrogen (which can partly be used directly in fuel cells) and the addition of carbon dioxide CO2 (Sabatier process) to create methane. The CO2 can be extracted from the air or fossil fuel waste gases by the amine process, amongst many others. It is a low-CO2 system, and has similar efficiencies of today's energy system. A 250 kW demonstration plant was ready in 2012 in Germany. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sabatier reaction」の詳細全文を読む スポンサード リンク
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