Identification of the starting reaction position in the hydrogenation of (N-ethyl)carbazole over Raney-Ni  

作　　者：Feifei Sun Yue An Lecheng Lei Fuying Wu Jingke Zhu Xingwang Zhang 

机构地区：[1]Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Department of Chemical and Biological Engineering,Zhejiang University

出　　处：《Journal of Energy Chemistry》2015年第2期219-224,共6页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(U1162127,U1462201,21076189,21476202 and 21276231)

摘　　要：Hydrogenation of carbazole and N-ethylcarbazole over Raney-Ni catalyst were realized in the temperature range of 393-503 K. 4[H] adduct dominated the hydrogenation products and the formation of 2[H] adduct was the rate-limiting step during the period, in which the conversion of carbazole was less than 40%. The hydrogenation process followed pseudo-first-order kinetics and the hydrogenation activation energies of carbazole and N-ethylcarbazole were 90 kJ/mol and 115 kJ/mol, respectively. The reaction starting position as well as the pathway of the hydrogenation of （N-ethyl）carbazole were investigated by comparing the kinetic characteristics of hydrogen uptake of carbazole and N- ethylcarbazole. The results showed that the reaction was a stepwise hydrogenation process and the first H_2 was added to the C1 = C10 double bond in the hydrogenation.Hydrogenation of carbazole and N-ethylcarbazole over Raney-Ni catalyst were realized in the temperature range of 393-503 K. 4[H] adduct dominated the hydrogenation products and the formation of 2[H] adduct was the rate-limiting step during the period, in which the conversion of carbazole was less than 40%. The hydrogenation process followed pseudo-first-order kinetics and the hydrogenation activation energies of carbazole and N-ethylcarbazole were 90 kJ/mol and 115 kJ/mol, respectively. The reaction starting position as well as the pathway of the hydrogenation of （N-ethyl）carbazole were investigated by comparing the kinetic characteristics of hydrogen uptake of carbazole and N- ethylcarbazole. The results showed that the reaction was a stepwise hydrogenation process and the first H_2 was added to the C1 = C10 double bond in the hydrogenation.

关 键 词：（N-ethyl）carbazole hydrogen storage Raney-Ni catalyst reaction kinetics first reaction position 

分 类 号：O626[理学—有机化学]