甲烷氧化偶联CaF_2/Sm_2O_3催化剂的研究
Oxidative Coupling of Methane Over CaF_2/Sm_2O_3 Catalysts
Abstract
甲烷氧化偶联CAf_2/SM_2O_3催化剂的研究周水琴，龙瑞强，黄亚萍，万惠霖，蔡启瑞（厦门大学化学系，固体表面物理化学国家重点实验室，厦门，361005）关键词甲烷氧化偶联，氟化钙，三氧化二钐，离子交换，氧物种甲烷氧化偶联制乙烯是催化领域中最活跃的？.. The results showed that,with the addition of CaF2 to Sm2O3,the catalytic properties For OCM were apparently improved.XRD analysis of the Fresh catalysts revealed the existence of Smof in 20%-80%CaF2/Sm2O3.XPS and IR spectra of O2-pre adsorbed CaF2/Sm2O3 samples taken at room temperature indicated the presence of O and Ospecies.O species could also be detected over 20%CaF2/Sm2O3 at 500℃ in situ IR spectroscopy,but it vanished over the Sm2O3 at the same temperature.