在ThO_2－SrCO_3／BaSO_4催化剂中甲烷氧化偶联反应的研究

研究了ＴｈＯ２－ＳｒＣＯ３／ＢａＳＯ４催化剂在甲烷氧化偶联反应中的催化作用，发现在ＳｒＣＯ３／ＢａＳＯ４中添加ＴｈＯ２可明显提高催化剂的活性，其Ｃ２选择性及Ｃ２收率可达６１．３１％和１８．１７％，而且经过３００ｈ的连续考察，活性稳定。用ＸＲＤ方法研究了３组份催化剂的物相组成，推测结构与催化性能的关系。用ＴＰＤ方法研究３组份催化剂的酸碱性与活性的关系。

Study of OCM for ThO 2 SrCO 3/BaSO 4

he catalysis of ThO 2 SrCO 3/BaSO 4 catalyst for oxidative coupling of methane (OCM) was studied. It is found that the activity could be improved by adding ThO 2 to SrCO 3/BaSO 4, and kept steady after a 300 h continuous test, with C 2 selectivity and yield being 61.31% and 18.17% respectively. Using XRD, the phase composition of the three component catalyst was studied and the effect of structure on activity inferred. The relation between activity and acid base property of the catalyst was also investigated by TPD.