Activity Evaluation of CoMo Nanoparticles Supported on Meso-microporous Composites in Dibenzothiophene Hydrodesulphurization

*Nastaran Parsafard  -  Department of Applied Chemistry, Kosar University of Bojnord, Iran, Islamic Republic of
Mohammad Hasan Peyrovi  -  Department of Physical Chemistry, Faculty of Chemistry Science and Petroleum, University of Shahid Beheshti, Iran, Islamic Republic of
Zahra Mohammadian  -  Department of Physical Chemistry, Faculty of Chemistry Science and Petroleum, University of Shahid Beheshti, Iran, Islamic Republic of
Niloofar Atashi  -  Faculty of Chemistry Science and Petroleum, Department of Physical Chemistry, University of Shahid Beheshti, Iran, Islamic Republic of
Received: 3 Aug 2019; Revised: 21 Oct 2019; Accepted: 24 Oct 2019; Published: 1 Apr 2020; Available online: 28 Feb 2020.
Open Access Copyright (c) 2020 Bulletin of Chemical Reaction Engineering & Catalysis
License URL: http://creativecommons.org/licenses/by-sa/4.0

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Abstract

CoMo-supported mesoporous catalysts were synthesized by 50 wt% of HZSM-5 and 50 wt% of FSM-16, KIT-6, and MCM-48. These catalysts were prepared by the wet-impregnation method and pre-sulfided with CS2. The catalytic performance was evaluated for HDS reaction of dibenzothiophene over a temperature range of 250-400 °C in a micro fixed-bed reactor under atmospheric pressure. The supported CoMo bimetallic catalysts were characterized by XRD, XRF, FT-IR, N2 adsorption-desorption, and SEM. The CoMo/KIT-6/HZSM-5 indicate higher activity than other catalysts at 400 °C for dibenzothiophene hydrodesulphurization. Also, the best selectivity to cyclohexylbenzene (CHB) is related to CoMo/FSM-16/HZSM-5. The activation energy was also calculated for all prepared catalysts for the conversions of less than 10%; according to which, the activation energy for CoMo/KIT-6/HZSM-5 is less than other catalysts (~21 kJ/mol) which can be related to the appropriate pore size and high surface area of the support. Copyright © 2020 BCREC Group. All rights reserved

 

Keywords: Wet-impregnation; Hydrodesulphurization; Dibenzothiophene; Bimetallic catalysts; Activity.

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