Kinetics of hydrodesulfurization of dibenzothiophene over NiO-MoO3/γ-Al2O3 catalyst期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Kinetics of hydrodesulfurization of dibenzothiophene over NiO-MoO3/γ-Al2O3 catalyst

Authors:	Kyung-Lim Kim Ki-Sup Choi

Affiliation:	(1) Department of Chemical Engineering, Yonsei University, 12C-749 Seoul, Korea;(2) Material Devices Research Center, Samsung Advanced Institute of Technology, Korea

Abstract:	The kinetics of the hydrodesulfurization(HDS) of dibenzothiophene (DBT) has been studied over a NiO-MoO₃/γ-Al₂O₃ catalyst in the temperature range of 473-673 K for partial pressures of DBT from 20 x 10⁵Pa to 70 x 10⁵Pa. A form of the Langmuir-Hinshelwood type rate equation was used to describe the kinetics of the reaction. The reaction was carried out at low conversion level to obtain initial reaction rate data. From this study the rate equation giving the best fit to the data was $r = frac{{k_D P_D P_H }}{{left[ {1 + K_D P_D + left( {K_H P_H } right)^{1/2} } right]^2 }}$ , which suggests that DBT and hydrogen adsorb on the same type of active sites and that hydrogen adsorbs dissociatively.

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