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

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 th...

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Bibliographic Details
Published in:能源化学：英文版 2015, Vol.24 (2), p.219-224
Main Author: Feifei Sun Yue An Lecheng Lei Fuying Wu Jingke Zhu Xingwang Zhang
Format: Article
Language:English
Subjects:
N-乙基咔唑
一级反应动力学
动力学特性
氢化过程
温度范围
识别
起始位置
镍催化剂
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Summary: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.
ISSN:2095-4956