Chemical kinetics of hydroxylation of phenol catalyzed by TS-1/diatomite in fixed-bed reactor

被引：0
|
作者：
Liu, Hong [1 ,2 ]
Lu, Guanzhong [1 ]
Guo, Yanglong [1 ]
Guo, Yun [1 ]
Wang, Junsong [1 ]
机构：
[1] Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China
[2] College of Environmental and Chemical Engineering, Shanghai University, Shanghai 200072, China
来源：
Chemical Engineering Journal | 2006年 / 116卷 / 03期
关键词：
The chemical kinetics of hydroxylation of phenol with 30% H 2O2 over the TS-1/diatomite catalyst in a fixed-bed reactor system was studied at 50-90°C. The rate of hydroxylation of phenol was found to increase with increase in temperature; phenol and hydrogen peroxide concentrations. Simultaneously; the rate of decomposition of hydrogen peroxide also increased with increase in temperature and hydrogen peroxide concentration. Based on our analysis; the consuming rate of phenol; formation rate of catechol and hydroquinone and the rate of decomposition of hydrogen peroxide can be described as: rP=7.18×103 e-(42.0/RT)CP1.06CH2O20.34; rCAT=3.92×103; e-(42.1/RT)CP1.09CH2O20.33; rHQ=3.13×103 e-(41.9/RT)CP1.04CH2O20.35 and rH2O2=1.75×107 e-(57.8/RT)CH2O20.75; respectively. Based on the Eley-Rideal mechanism for an adsorption of single molecule; the reaction kinetic model of hydroxylation of phenol has been founded; that is r=(kK1CH2O2CP)/ (1+K1CH2O2+K2CP+K3CProd); which is in agreement with the experimental data. © 2005 Elsevier B.V. All rights reserved;
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页码：179 / 186
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