MgF_2-AlF_3催化剂用于四氟乙烷裂解制备三氟乙烯  

Catalytic pyrolysis performance of MgF_2-AlF_3 catalysts for tetrafluoroethane to trifluoroethylene

作　　者：蔚辰刚[1] 谢冠群[1] 周强 王树华 罗孟飞[1] 

机构地区：[1]浙江师范大学物理化学研究所,浙江省固体表面反应化学重点实验室,浙江金华321004 [2]巨化集团技术中心,浙江衢州324004

出　　处：《工业催化》2012年第4期56-59,共4页Industrial Catalysis

基　　金：浙江省科技厅重大科技专项(2010C01035)资助项目

摘　　要：采用沉积沉淀法和浸渍法制备了MgF2-AlF3催化剂,应用XRD、NH3-TPD、BET和拉曼光谱等对催化剂进行表征,并将催化剂应用于四氟乙烷裂解制备三氟乙烯反应。结果表明,沉积沉淀法制备的MgF2-AlF3-D具有较高的活性和反应稳定性。反应温度450℃时,四氟乙烷转化率为33.4%,三氟乙烯选择性大于99%。催化剂表面酸性和积炭是影响催化剂活性和稳定性的主要因素。A series of MgF2-AlF3 catalysts were prepared by deposition precipitation method and impregnation method,and characterized by XRD,NH3-TPD,BET and Raman.The as-prepared catalysts were used in catalytic pyrolysis of tetrafluoroethane（HFC-134a） to trifluoroethylene（TrFE）.The results showed that MgF2-AlF3 catalysts prepared by deposition precipitation method exhibited higher activity and stability than those by impregnation method,and tetrafluoroethane conversion of 33.4% and the selectivity to trifluoroethylene of 99.8% were attained at reaction temperature 450 ℃.The strength of surface acid sites and carbon deposit on the catalyst surface were the main influencing factors of the catalyst activity and stability.

关 键 词：有机合成化学 催化裂解 四氟乙烷 三氟乙烯 沉积沉淀法 浸渍法 MgF2-AlF3 

分 类 号：O643.36[理学—物理化学] TQ222.423[理学—化学]