Durian shell biochar catalyst with excellent aromatic selectivity and deoxygenation performance: application in catalytic co-pyrolysis of pretreated Chlorella and waste vegetable oil

Qifan Ling, Sirong He, Chuan Yuan, Bin Cao, Cheng Pan, Xiaoxue Cheng, Yamin Hu, Sivakumar Esakkimuthu, Shuang Wang and Xun Hu

Renewable Energy, 2025, vol. 249, issue C

Abstract: In order to achieve catalytic co-pyrolysis of pretreated microalgae with waste vegetable oils for quality enhancement, durian shells, a typical fruit waste, were used to prepare biochar-based catalysts, and CaO, which is believed to possess high deoxygenation activity, was loaded onto the durian shell biochar (DSBC). The prepared catalyst xCaO-DSBC was found to possess a specific surface area of more than 1200 m2/g with a typical micro-mesoporous composite structure. When the catalyst was applied to catalytic pyrolysis of pretreated microalgae, the relative content of aromatics in the bio-oil was enhanced from less than 20 %–62.86 %. When the catalyst was used in the catalytic co-pyrolysis of microalgae and waste vegetable oil, 85.55 % of aromatics were achieved with a total relative content of 40.75 % of BTEXs, n-propylbenzene and naphthalene, while the relative content of oxygenated components was only 2.01 %. After the catalyst has been used four times, the total relative content of aromatics and hydrocarbons in the liquid product is still more than 73 %, while the relative content of oxygenated components is less than 5 %. Overall, the prepared durian shell biochar-based catalysts possessed excellent deoxygenation performance and aromatic selectivity.

Keywords: Durian shell; Biochar; Catalyst; Catalytic co-pyrolysis; Biomass; Aromatic (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:249:y:2025:i:c:s0960148125009668

DOI: 10.1016/j.renene.2025.123304

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