Products, Pathways, and Kinetics for Catalytic Hydrodenitrogenation of Quinoline in Hydrothermal Condition
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Products, Pathways, and Kinetics for Catalytic Hydrodenitrogenation of Quinoline in Hydrothermal Condition
- 发表刊物：
- The Journal of Supercritical Fluids
- 摘要：
- The purpose of this study is to investigate reaction mechanism and kinetics of catalytic hydrodenitrogenation (HDN) of quinoline under hydrothermal conditions (300°C, 350°C, and 400°C), using Ni-Ru/γ-Al2O3 catalyst and formic acid (FA) as hydrogen donor. 1,2,3,4-tetrahydroquinoline, decahydroquinoline, aniline, methyl aniline, 2-hexene, and toluene were primary products. Quinoline conversion fits a first-order kinetics, with an activation energy of 41.72 kJ/mol. A possible reaction network of HDN of quinoline was developed and the corresponding kinetic model captures nearly all the temporal variation of all major products’ concentration. The kinetic modelling results indicated that the dehydrogenation of 1,2,3,4-tetrahydroquinoline to quinoline is the rate-determining step with high energy barrier of 174.6 kJ/mol. Reaction rate analysis showed 2-hexene as the major denitrogenated product is mainly derived from hydrogenation of aniline and its formation rate from decahydroquinoline is higher than the path from aniline derivatives. Sensitivity study revealed that hydrogenation from quinoline to decahydroquinoline has a strong influence on the whole reaction process. Both catalyst durability test and catalyst characterizations demonstrated that the Ni-Ru bimetallic catalyst was relatively unstable under supercritical water conditions, probably due to the joint influences of partial agglomeration of active metal and hydrolysis of supporter γ-Al2O3.
- 合写作者：
- Dan Xie, Xu Liu, Lv heng, Yang Guo*
- 是否译文：
- 否
- 发表时间：
- 2021-12-21