TPR-TPO联用技术表征Cu/SiO_2及其甘油催化氢解性能的考察  

Characterization of Cu/SiO_2 by TPR-TPO technology and its performance for catalytic hydrogenolysis of glycerol

作　　者：王爽[1] 梁宝臣[1] 陈慧[1] 

机构地区：[1]天津理工大学化学化工学院,天津300384

出　　处：《工业催化》2011年第11期80-83,共4页Industrial Catalysis

摘　　要：采用TPR-TPO联用技术对溶胶-凝胶法制备的Cu/SiO_2催化剂进行表征,计算出催化剂的还原活化能E_a=55.04 kJ·mol^(-1),指前因子A=4.24×10~6s^(-1)。在反应压力4.0 MPa,空速0.46 h^(-1)、n(H_1):n(甘油)=10:1和催化剂用量5.0g的条件下,考察温度对甘油催化氢解性能的影响,220℃时,1,2-丙二醇收率最高,达96%。同时,根据TPR-TPO表征结果,将经历一次还原过程和还原-氧化-再还原过程活化的催化剂分别用于甘油催化氢解反应,还原-氧化-再还原过程较还原过程活化的催化剂收率提高11%。Cu/SiO2 catalyst prepared by sol-gel method was characterized by using TPR-TPO technology. The reduction activation energy and pre-exponential factor were calculated,which were E, = 55.04 kJ ~ mol- and A = 4.24 106 S - 1 , respectively. The effects of temperature on catalytic hydrogenolysis of glycerol were studied under the reaction condition of （ 180 -240） ℃ ,4.0 MPa,space velocity 0.46 h^-0 ,n（ H2 ）： n（ glycerol） = 10： 1. 1,2-Propanediol yield of 96% was attained at 220 ℃. Meanwhile,the catalysts of undergoing once reduction process and reduction-oxidation-reduction process were used in glycerol hydro- genation respectively. The results showed that the yield Of latter reaction increased by 11% compared with the former one.

关 键 词：催化化学 TPR—TPO联用技术 铜系催化剂 甘油催化氢解 

分 类 号：O643.36[理学—物理化学] O623.413[理学—化学]