The role of catalyst synthesis on the enhancement of nickel praseodymium (III) oxide for the conversion of greenhouse gases to syngas

Osazuwa, Osarieme Uyi and Sumaiya, Zainal Abidin and Nurul Asmawati, Roslan and Fan, Xiaolei and Herma Dina, Setiabudi and Vo, Dai Viet N. and Onwudili, Jude Azubuike (2023) The role of catalyst synthesis on the enhancement of nickel praseodymium (III) oxide for the conversion of greenhouse gases to syngas. Clean Technologies and Environmental Policy, 25 (5). pp. 1569-1587. ISSN 1618-954X. (Published)

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DOI/Official URL: https://doi.org/10.1007/s10098-022-02455-2

Abstract

Catalytic methane (CH4) dry reforming (MDR) reaction proceeds with the formation of carbon; hence the effects of the catalyst preparation method on the type of carbon are worth investigating. This study investigated the performance of 20 wt% nickel praseodymium (III) oxide (20 wt% Ni/Pr2O3) catalysts prepared by incipient wetness impregnation (IWI), ultrasonic wet impregnation (US-WI), and Pechini sol–gel (PSG) methods. The catalysts crystallite size was approximately 21.3 nm, 21.3 nm, and 10.6 nm, for IWI, US-WI, and PSG catalysts, respectively. Study of the temperature effecton the MDR system showed that higher temperatures favored the MDR reaction with the side reaction playing vital roles. The catalyst synthesized by the PSG method showd higher carbon gasification rate with the stability up to 24 h, whereas catalysts from other synthesis methods were only active for less than 2 h, which could be due to the formation of higher amount of filamentous carbon, balance in oxygen species, and the smaller crystallite size of the PSG-20 wt% Ni/Pr2O3. The PSG-20 wt% Ni/Pr2O3 catalyst accumulated more filamentous carbon than graphitic carbon. In contrast, the IWI and US-WI catalysts accumulated mainly graphitic carbon which encapsulated the Ni0 sites, resulting in excess carbon deposition and reactor clogging within 2 h on stream.

Item Type:	Article
Additional Information:	Indexed by Scopus
Uncontrolled Keywords:	Carbon species; Greenhouse gases; Methane dry reforming; Nickel catalyst; Oxygen species; Synthesis method
Subjects:	Q Science > QD Chemistry T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology
Faculty/Division:	Institute of Postgraduate Studies Faculty of Chemical and Process Engineering Technology
Depositing User:	Mr Muhamad Firdaus Janih@Jaini
Date Deposited:	28 May 2024 08:02
Last Modified:	28 May 2024 08:02
URI:	http://umpir.ump.edu.my/id/eprint/40827
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