Sm_2O_3和La_2O_3对甲烷氧化偶联反应的促进作用

Promoter action of Sm_2O_3 and La_2O_3 on oxidative coupling reaction of methane

研究了在Li2 SO4/MgO催化剂中引入少量Sm2 O3 和La2 O3 对甲烷氧化偶联反应的影响 ,并考察了催化剂的稳定性能。结果发现 ,在Li2 SO4/MgO催化剂中引入少量Sm2 O3 可以提高催化剂活性和生成C2 烃的选择性 ,而加入少量La2 O3 会降低甲烷转化率。经 5 0 0h活性考察 ,Li2 SO4/Sm2 O3 ·MgO催化剂表现出良好的稳定性 ,具有深入研究的价值。

The effect of Sm_2O_3 and La_2O_3 on Li_2SO_4/MgO catalyst for oxidative coupling reaction of methane has been studied,while the stability of catalyst has also been tested.The results show that the activity of catalyst and the selectivity of C_2 hydrocarbons can be improved when a little Sm_2O_3 adds to Li_2SO_4/MgO catalyst,but the conversion of methane will be reduced when a little La_2O_3 adds to.The Li_2SO_4/Sm_2O_3MgO catalyst showed good stability during 500h countinous activity test,so it is worth being studied profoundly.