在锰镧氧化物上进行甲烷偶联反应

OXIDATIVE COUPLING OF METHANE OVER MANGANESE LANTHANUM OXIDE

研究了系列锰镧氧化物的甲烷氧化偶联催化反应。制备中添加柠檬酸、乙酸铵、草酸等有机物有利于形成大比表面无定形配合物,其中以添加草酸样品的耐热性最好,在焙烧中较易生成Mn_2O_3。当Mn/La比为0.2/9.8时,有利于催化反应性能的提高。

Oxidative dehydrogenation and coupling of methane for the production of hydrocarbons (C_2H_6,C_6H_4) has been studied over a series of lanthanum manganese oxide under CH_4/air=l,W/F=400g·s/l, 750℃. The catalyst obtained by coprecipitation with the addition of oxalic acid and followed by calcination,gives the best thermal stability and is easier in forming Mn_2O_3. A Mn/La ratio at 0.2/9.8 is beneficial for higher conversion and selectivity of methane.