Tailoring nickel precursors on red mud supports for catalytic hydrodeoxygenation of palmitic acid towards green diesel production

Jinyi Duan, Sicheng Chen, Quan Yao, Kaiyue Wu, Fenqiang Luo, Dechao Wang, Peng Liu, Jianchun Jiang and Zhifeng Zheng

Renewable Energy, 2025, vol. 241, issue C

Abstract: Active metals, especially nickel, play a crucial role in the hydrodeoxygenation (HDO) reaction for green diesel production. However, the choice of nickel precursor significantly impacts the catalytic effect. This study investigates the catalytic performance of six nickel precursors (nickel acetylacetonate, nickel acetate, nickel chloride, nickel carbonate, nickel nitrate, and nickel oxide) supported on red mud (RM) using palmitic acid as a model compound. The results demonstrate that nickel nitrate RM catalyst (Ni-N/RM) and nickel carbonate RM catalyst (Ni-C/RM) exhibit distinct behaviors. Ni-N/RM favors the HDO pathway, yielding cetane, while Ni-C/RM prefers the decarbonylation (DCO) and decarboxylation (DCO₂) pathways, producing pentadecane. Ni-N/RM also shows high stability, with an 81 % conversion rate after six cycles. These findings emphasize the significance of selecting the appropriate nickel precursor in determining the catalytic behavior and product distribution in green diesel production.

Keywords: Green diesel; Hydrodeoxygenation; Red mud; Nickel precursor (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:241:y:2025:i:c:s0960148124023474

DOI: 10.1016/j.renene.2024.122279

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