Gupta, Pavan K. (2026) Ni-Doped CeO2 as Ceramic Catalyst for Gamhar Sawdust Pyrolysis: Product Distribution and Enriched Bio-Oil Production. Journal of the American Ceramic Society , 109 (5).

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Abstract

The current study investigated the effect of Ni-CeO2 catalysts on the product distribution and bio-oil enrichment during catalytic upgrading of gamhar sawdust (GS) pyrolysis. Structural characterization of Ni-CeO2 catalysts confirmed CeO2 lattice retained the cubic fluorite structure. The average crystallite size was ∼43 nm, and XPS analysis confirmed defect redistribution. Catalyst addition showed a remarkably positive effect on both bio-oil yield and optimum temperature. Optimum bio-oil yield for thermal pyrolysis was determined to be 41.07 wt% at 600°C, while the bio-oil yield increased to 47.80 wt% at 550°C in the case of 10 wt% Ni/CeO2-assisted pyrolysis. Furthermore, catalytic bio-oil showed superior properties to the thermal pyrolysis-derived bio-oil. GC–MS and FTIR confirmed that catalytic upgrading redirected the bio-oil selectivity from oxygen-rich furans and carbonyl compounds to more aromatic hydrocarbons and partially deoxygenated phenolics. Unlike thermal pyrolysis, the catalytic process reduced the oxygenated functionalities and changed the pathways of vapor-phase cracking, without major structural collapse of ceria support. BET surface area of solid residue was further estimated as 393 m2/g at 700°C, Overall, tuned oxygen vacancies and surface redox properties of Ni-CeO2 have successfully modulated the devolatilization chemistry and selective vapor upgrading during GS pyrolysis.

Item Type:	Article
Subjects:	Coal Characterisation
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	07 Jul 2026 04:56
Last Modified:	07 Jul 2026 04:56
URI:	https://cimfr.csircentral.net/id/eprint/3039

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