Das, Rajasree and Gupta, Pavan K. and Gupta, Shubhi and Gupta, Goutam Kishore (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). ISSN 0002-7820
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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 remarkably positive effect on both bio-oil yield and optimum temperature. Optimum bio-oil yield for thermal pyrolysis was determined as 41.07 wt.% at 600 °C, while the bio-oil yield increased to 47.80 w.% at 550 °C in case of 10 wt.% Ni/CeO2 assisted pyrolysis. Furthermore, catalytic bio-oil showed superior properties than 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, 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-1 at 700 °C, Overall, tuned oxygen vacancies and surface redox properties of Ni-CeO2 has successfully modulated the devolatilization chemistry and selective vapor upgrading during GS pyrolysis. Keywords: Nickel-doped ceria (Ni-CeO2), Catalytic pyrolysis, Oxygen vacancies, Bio-oil, Biochar
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Nickel-doped ceria (Ni-CeO2), Catalytic pyrolysis, Oxygen vacancies, Bio-oil, Biochar |
| Subjects: | Environment and Pollution Ceramic-Metal Systems |
| Divisions: | Fuel Cell and Battery |
| Depositing User: | Ms Upasana Sahu |
| Date Deposited: | 22 Sep 2026 06:58 |
| Last Modified: | 22 Sep 2026 06:58 |
| URI: | https://cgcri.csircentral.net/id/eprint/5830 |
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