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

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

n-Heptane isomerization activities of Pt catalyst supported on micro/mesoporous composites

“…The mesoporous MCM-48 had synthesized by the following method [ 15 ]. Two point four g cetrimonium bromide (CTAB) had added to 50 g of DI water and then dissolved in it.…”

n-Heptane Isomerization Activities of Pt Catalyst Supported On Micro/Mesoporous Composites

“…The mesoporous MCM-48 was synthesized by the following method [12]. 2.4 g CTAB was added to 50 g of DI water and then dissolved in it.…”

Bimetallic CoMo Nanoparticles Supported over Carbon-Zeolite Composites as Dibenzothiophene Hydrodesulfurization Catalyst

“…These composites are symbolized as AC-Z (x:y) that x and y are the weight ratio of activated carbon and zeolite. Next, to prepare catalysts with 10 wt% molybdenum and 3 wt% cobalt, a solution of ammonium heptamolybdate at the specified concentration was prepared and a certain amount of cobalt nitrate salt was weighed and added to the desired composites [16]. Subsequently, by adding distilled water the final solution was stirred until the gel formed.…”

“…Also Zhang et al illustrated that nickel-molybdenum supported on ZSM-5-FDU-12 performs better than Ni-Mo/FDU-12 [15]. Parsafard et al investigated the activity of cobalt-molybdenum impregnated on silicates-HZSM-5 composites, which found CoMo/Kit-6-HZSM-5 have the acceptable performance in the HDS process due to its structural properties [16].…”