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The Role of Carbon-Containing Materials as Carriers for KCoMoS2 Active Phase on Synthesis of Alcohols from Syngas
* 1, 2 , 2 , 1 , 3 , 4 , 5 , * 2
1  Peoples’ Friendship University of Russia, Moscow 117198, Russia
2  N.D. Zelinsky Institute of Organic Chemistry RAS, Moscow 119991, Russia
3  University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa
4  A.A. Baikov Institute of Metallurgy and Materials RAS, Moscow, 119991, Russia
5  ENPO “Neorganika”, JSC, Electrostal 144001, Moscow region, Russia

Abstract:

A comparison study of the effect of different carbon-containing materials used as carriers on transition metal sulfide (TMS) catalyst behavior in the synthesis gas conversion has been conducted. Supports used for the synthesis of alcohols from syngas via KCoMoS2, in this project are γ-Al2O3, Carbon-Coated Alumina (CCA), Graphene coated Alumina (GCA), NiAl2O3.CuO, and different types of low-cost commercial activated carbons such as fabric active sorption (TCA), non-woven activated material (AHM), AG-3, OBC-1, DAC, and BAW. Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray Fluorescence (XRF), and N2 physisorption were used to characterize the carriers and catalysts. The obtained results have shown that GCA is more effective than alumina and CCA to increase the yield ratio between alcohol and hydrocarbons (YROH/HCs), besides it has shown low selectivity for CO2. The graphene ribbons have played a role in decreasing the interaction between alumina and the active phase which decreased the hydrogenation reaction. The used types of carbon materials showed different supporting efficiency to synthesis of alcohol from syngas. The activities depend on the support nature have shown trends to increase in the following order: Al2O3 < CCA < BAW < TCA < Ag3 < AHM > GCA.

Keywords: Syngas conversion, KCoMoS2, CCA, Activated carbon, Supported transition metal sulfide catalysts.
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