Production of renewable aromatics from jatropha oil over multifunctional ZnCo/ZSM-5 catalysts

Omvir Singh, Ankit Agrawal, Neha Dhiman, Bhanu Prasad Vempatapu, Ken Chiang, Shailendra Tripathi and Bipul Sarkar

Renewable Energy, 2021, vol. 179, issue C, 2124-2135

Abstract: The transformation of jatropha oil into aromatics using bimetallic ZSM-5 catalyst was investigated in a continuous downflow reactor. The effect of change in surface acidity was observed closely concerning the formation of C6–C8 aromatics; a balance Lewis and Brønsted acidic sites showed a strong correlation with light aromatics. Ce as a promoter modify the surface acidity, which enhanced the dehydro-deoxygenation reaction and improved the aromatic selectivity. Hence, Ce-promoted ZnCo/Z catalysts showed better performance compared to La-promoted ZnCo/Z. The 10Zn5Co5Ce/Z catalyst showed 87.6% oil conversion, with 81.9% total aromatics. The selectivity toward C6–C8 aromatics found to be 71.8%, with the presence of 35.3% xylenes and ethylbenzene. The Normalized XANES spectra suggest that the Co resides in the tetrahedrally coordinated environment in the ZnCo2O4 catalyst and such intensity of the pre-edge feature evidence for incorporating Co into the material framework. The optimised catalyst, i.e.,10Zn5Co5Ce/Z shows negligible coke deposition, and it was calculated to be 1.33 × 10−3 (gcoke/gcat h); further, the catalyst was regenerated for three consecutive cycles.

Keywords: Surface acidity; Supported catalyst; Aromatisation; Jatropha oil; Bio-aromatics (search for similar items in EconPapers)
Date: 2021
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:179:y:2021:i:c:p:2124-2135

DOI: 10.1016/j.renene.2021.08.011

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