Enhancing H2 yield through NiO loading and process optimization in CO2–CH4 reforming over fibrous silica-ceria catalysts

M.B. Bahari and A.A. Jalil and M.Y.S. Hamid and C.H. Sheng and N.S. Hassan and A.H. Hatta and N.M. Izzudin and M.H. Sawal and A.F.I. Ja’afar and M.A. Aziz (2025) Enhancing H2 yield through NiO loading and process optimization in CO2–CH4 reforming over fibrous silica-ceria catalysts. Elsevier International Journal of Hydrogen Energy, 164. pp. 1-11. ISSN 0360-3199

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Abstract

The emerging global concern over climate change and the need for sustainable energy has led to extensive investigations into CO2–CH4 reforming as an efficient strategy for H2 generation. Due to numerous challenges related to catalytic activity, this study focuses on the synthesis of NiO-impregnated fibrous silica–ceria (FSCe) support, generated through a microemulsion technique. The tests revealed that the 10 %Ni/FSCe catalyst exhibited the highest CO2 (81.9–93.6 %) and CH4 (92.9–99.6 %) conversion, as well as H2 yield (46.7–58.9 %) across a temperature range of 500–800 °C, superior to the 5 %Ni/FSCe and 15 %Ni/FSCe. This is attributed to the great distribution of NiO on the FSCe support, preserving its fibrous morphology and maximizing the availability of active sites. XRD and FESEM confirm that NiO particles are well-dispersed, with no significant particle growth. CO2-TPD analysis reveals that the 10 %Ni/FSCe catalyst has a favorable distribution of basic sites, particularly Lewis basic sites, which are crucial for CO2 activation during the reforming process. Additionally, response surface methodology (RSM) was applied to the outperformed catalyst to optimize reaction conditions, identifying the ideal parameters for maximum H2 yield (41.3 %). The experimental results closely match predicted values, thus validating the optimization model and confirming the high potential for sustainable H2 production via CO2–CH4 reforming.

Item Type:	Article
Keyword:	CO2–CH4 reforming, Hydrogen, Ni-based catalyst, CeO2, Lewis basic
Subjects:	H Social Sciences > HD Industries. Land use. Labor > HD28-9999 Industries. Land use. Labor > HD2350.8-2356 Large industry. Factory system. Big business > HD3611-4730.9 Industrial policy. The state and industrial organization Including licensing of occupations and professions, subsidies, inspection, government ownership, municipal services T Technology > TA Engineering (General). Civil engineering (General) > TA1-2040 Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Department:	FACULTY > Faculty of Engineering
Depositing User:	JUNAINE JASNI -
Date Deposited:	07 Nov 2025 10:07
Last Modified:	07 Nov 2025 10:07
URI:	https://eprints.ums.edu.my/id/eprint/45639

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