烯烃加氢担载铁催化剂物相变化的考察  

EFFECT OF THE SPECIES ON HYDROGENATION OF OLEFINS ON SUPPORTED IRON CATALYSTS

作　　者：卢振举[1] 梁东白[1] 冯喜云[1] 罗洪原[1] 林励吾[1] 

机构地区：[1]中国科学院大连化学物理研究所

出　　处：《石油学报（石油加工）》1993年第3期35-40,共6页Acta Petrolei Sinica(Petroleum Processing Section)

摘　　要：经过H_2和H_2S处理的担载铁催化剂,对于烯烃和二烯烃的加氢有着不同的活性相.通过对催化剂的程序升温还原谱和穆斯堡尔谱以及加氢反应,考察了催化剂的物相及其对烯烃加氢反应的影响;提出了铁催化剂加氢活性相的形态和生成方式.The iron catalyst was prepared by impregnating some carrier with aqueous solution of Fe(NO_3)_3. After reduction by hydrogen,the activity of iron catalysts for hydrogenation of olefins was excellent. When reduced by hydrogen sulfide, the catalyst showed high activity for hydrogenation of diolefins. The catalyst was characterized by M?ssbauer Spectroscopy. The results indicated that before reduction the iron on the support is Fe_2O_3 phase. After the catalyst is reduced by hydrogen, Fe_2O_3 phase changes into Fe^(2+). When reduced by hydrogen sulfide, Fe_2O_3 phase changes into Fe_(1-x)S(0<x<1)pyrrhotites. After reaction of hydrogenation of olefins and diolefins, Fe^(2+) and Fe_(1-x)S phase change into Fe_3C and FeS phase. The active centers of supported iron catalyst for hydrogenation of olefins and diolefins is different. The Change of iron species on hydrogenation of olefins and diolefins are: Hydrogenation of olefins Fe_2O_3→Fe^(2+)→Fe_3C Hydrogenation of diolefins i. Fe_2O_3→Fe_(1-x)S→FeS→Fe_3C

关 键 词：烯烃 加氢催化剂 担载铁催化剂 

分 类 号：TQ426.94[化学工程]