OXIDATIVE COUPLING OF METHANE OVER LA-BA- SN(SM, CE) CATALYSTS

The catalytic performance of La-Ba-Sn(Sm,Ce) system catalysts was inve stigated. The results showed that the addition of Sn, Sm and Ce compon ents significantly improved the catalytic activities and Ct selectivit ies for OCM, Furthermore, low calcination temperature was favorable fo r the low temperature OCM reaction, and high C-2 yields and selectivit ies were obtained at high calcination temperature and under optimum re action conditions. In combination with XRD, XPS analysis, it can he co ncluded that the third components are highly dispersed in the bulk of the catalysts, which is responsible for the OCM.