Ⅰ.CO2加氢选择合成甲醇的主要反应如下:
①CO2(g)+3H2(g)⇌CH3OH(g)+H2O(g)ΔH1(298K)
②CO2(g)+H2(g)⇌CO(g)+H2O(g)ΔH2(298K)
③CO(g)+2H2(g)⇌CH3OH(g)ΔH3(298K)