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Volume 15
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10.3390/catal15050498
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Catalytic Hydrodeoxygenation of Pyrolysis Volatiles from Pine Nut Shell over Ni-V Bimetallic Catalysts Supported on Zeolites

by
Yujian Wu
1,
Xiwei Xu
2,
Xudong Fan
2,
Yan Sun
2,
Ren Tu
2,
Enchen Jiang
2,*,
Qing Xu
1,* and
Chunbao Charles Xu
3,*
1
College of Ocean Engineering and Energy, Guangdong Ocean University, Zhanjiang 524088, China
2
College of Engineering, South China Agricultural University, Guangzhou 510640, China
3
School of Energy and Environment, City University of Hong Kong, Kowloon, Hong Kong, China
*
Authors to whom correspondence should be addressed.
Catalysts 2025, 15(5), 498; https://doi.org/10.3390/catal15050498
Submission received: 20 April 2025 / Revised: 15 May 2025 / Accepted: 19 May 2025 / Published: 20 May 2025
(This article belongs to the Topic Advanced Bioenergy and Biofuel Technologies)
Versions Notes

Abstract

Bio-oil is a potential source for the production of alternative fuels and chemicals. In this work, Ni-V bimetallic zeolite catalysts were synthesized and evaluated in in situ catalytic hydrodeoxygenation (HDO) of pyrolysis volatiles of pine nut shell for upgraded bio-oil products. The pH and lower heating value (LHV) of the upgraded bio-oil products were improved by in situ catalytic HDO, while the moisture content and density of the oil decreased. The O/C ratio of the upgraded bio-oil products decreased significantly, and the oxygenated compounds in the pyrolysis volatiles were converted efficiently via deoxygenation over Ni-V zeolite catalysts. The highest HDO activity was obtained with NiV/MesoY, where the obtained bio-oil had the lowest O/C atomic ratio (0.27), a higher LHV (27.03 MJ/kg) and the highest selectivity (19.6%) towards target arenes. Owing to the more appropriate pore size distribution and better dispersion of metal active sites, NiV/MesoY enhanced the transformation of reacting intermediates, obtaining the dominant products of phenols and arenes. A higher HDO temperature improved the catalytic activity of pyrolysis volatiles to form more deoxygenated arenes. Higher Ni loading could generate more metal active sites, thus promoting the catalyst’s HDO activity for pyrolysis volatiles. This study contributes to the development of cost-efficient and eco-friendly HDO catalysts, which are required for producing high-quality biofuel products.
Keywords: pyrolysis volatiles; pine nut shell; catalytic hydrodeoxygenation; Ni-V composites; zeolites pyrolysis volatiles; pine nut shell; catalytic hydrodeoxygenation; Ni-V composites; zeolites

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MDPI and ACS Style

Wu, Y.; Xu, X.; Fan, X.; Sun, Y.; Tu, R.; Jiang, E.; Xu, Q.; Xu, C.C. Catalytic Hydrodeoxygenation of Pyrolysis Volatiles from Pine Nut Shell over Ni-V Bimetallic Catalysts Supported on Zeolites. Catalysts 2025, 15, 498. https://doi.org/10.3390/catal15050498

AMA Style

Wu Y, Xu X, Fan X, Sun Y, Tu R, Jiang E, Xu Q, Xu CC. Catalytic Hydrodeoxygenation of Pyrolysis Volatiles from Pine Nut Shell over Ni-V Bimetallic Catalysts Supported on Zeolites. Catalysts. 2025; 15(5):498. https://doi.org/10.3390/catal15050498

Chicago/Turabian Style

Wu, Yujian, Xiwei Xu, Xudong Fan, Yan Sun, Ren Tu, Enchen Jiang, Qing Xu, and Chunbao Charles Xu. 2025. "Catalytic Hydrodeoxygenation of Pyrolysis Volatiles from Pine Nut Shell over Ni-V Bimetallic Catalysts Supported on Zeolites" Catalysts 15, no. 5: 498. https://doi.org/10.3390/catal15050498

APA Style

Wu, Y., Xu, X., Fan, X., Sun, Y., Tu, R., Jiang, E., Xu, Q., & Xu, C. C. (2025). Catalytic Hydrodeoxygenation of Pyrolysis Volatiles from Pine Nut Shell over Ni-V Bimetallic Catalysts Supported on Zeolites. Catalysts, 15(5), 498. https://doi.org/10.3390/catal15050498

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