کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
154202 456565 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Chemical kinetics of hydroxylation of phenol catalyzed by TS-1/diatomite in fixed-bed reactor
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Chemical kinetics of hydroxylation of phenol catalyzed by TS-1/diatomite in fixed-bed reactor
چکیده انگلیسی

The chemical kinetics of hydroxylation of phenol with 30% H2O2 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)r=(kK1CH2O2CP)/(1+K1CH2O2+K2CP+K3CProd), which is in agreement with the experimental data.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 116, Issue 3, 1 March 2006, Pages 179–186
نویسندگان
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