Frontiers of Chemical Science and Engineering, Year (2020-5)

Title : ( Fischer-Tropsch synthesis by reduced graphene oxide nanosheets supported cobalt catalysts: Role of support and metal nanoparticle size on catalyst activity and products selectivity )

Authors: Hasan Oliaei Torshizi , Ali Nakhaei Pour , Ali Mohammadi , Yahya Zamani , Seyed Mehdi Kamali Shahri ,

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Abstract

In this paper, a series of cobalt catalysts supported on reduced graphene oxide (rGO) nanosheets with the loading of 5, 15 and 30 wt-% were provided by the impregnation method. The activity of the prepared catalysts is evaluated in the Fischer-Tropsch synthesis (FTS). The prepared catalysts were carefully characterized by nitrogen adsorption-desorption, hydrogen chemisorption, X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, temperature programmed reduction, transmission electron microscopy, and field emission scanning electron Microscopy techniques to confirm that cobalt particles were greatly dispersed on the rGO nanosheets. The results showed that with increasing the cobalt loading on the rGO support, the carbon defects are increased and as a consequence, the reduction of cobalt is decreased. The FTS activity results showed that the cobalt-time yield and turnover frequency passed from a maximum for catalyst with the Co0 average particle size of 15 nm due to the synergetic effect of cobalt reducibility and particle size. The products selectivity results indicated that the methane selectivity decreases, whereas the C5 + selectivity raises with the increasing of the cobalt particle size, which can be explained by chain propagation in the primary chain growth reactions.

Keywords

, cobalt catalyst, cobalt particle size, Fischer-Tropsch synthesis, reduced graphene oxide, supported catalyst
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@article{paperid:1079462,
author = {Oliaei Torshizi, Hasan and Nakhaei Pour, Ali and علی محمدی and یحیی زمانی and سید مهدی کمالی شهری},
title = {Fischer-Tropsch synthesis by reduced graphene oxide nanosheets supported cobalt catalysts: Role of support and metal nanoparticle size on catalyst activity and products selectivity},
journal = {Frontiers of Chemical Science and Engineering},
year = {2020},
month = {May},
issn = {2095-0179},
keywords = {cobalt catalyst; cobalt particle size; Fischer-Tropsch synthesis; reduced graphene oxide; supported catalyst},
}

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%0 Journal Article
%T Fischer-Tropsch synthesis by reduced graphene oxide nanosheets supported cobalt catalysts: Role of support and metal nanoparticle size on catalyst activity and products selectivity
%A Oliaei Torshizi, Hasan
%A Nakhaei Pour, Ali
%A علی محمدی
%A یحیی زمانی
%A سید مهدی کمالی شهری
%J Frontiers of Chemical Science and Engineering
%@ 2095-0179
%D 2020

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