Green Diesel Production Catalyzed by MoNi Catalysts Supported on Rice Husk Biochar

Kordouli, Eleana; Vourtsani, Panagiota-Iliana; Mourgkogiannis, Nikolaos; Zafeiropoulos, John; Bourikas, Kyriakos; Kordulis, Christos

doi:10.3390/catal14120865

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Open AccessArticle

Green Diesel Production Catalyzed by MoNi Catalysts Supported on Rice Husk Biochar

by

Eleana Kordouli

^1,2,*

,

Panagiota-Iliana Vourtsani

¹,

Nikolaos Mourgkogiannis

¹,

John Zafeiropoulos

²,

Kyriakos Bourikas

²

and

Christos Kordulis

^1,3,*

¹

Department of Chemistry, University of Patras, GR-26504 Patras, Greece

²

School of Science and Technology, Hellenic Open University Parodos Aristotelous 18, GR-26335 Patras, Greece

³

Institute of Chemical Engineering Science, Foundation for Research and Technology (FORTH/ICE-HT), Stadiou Str., Platani, P.O. Box 1414, GR-26500 Patras, Greece

^*

Authors to whom correspondence should be addressed.

Catalysts 2024, 14(12), 865; https://doi.org/10.3390/catal14120865 (registering DOI)

Submission received: 9 November 2024 / Revised: 20 November 2024 / Accepted: 25 November 2024 / Published: 26 November 2024

(This article belongs to the Special Issue Editorial Board Members' Collection Series: Catalysts and Processes for Synthesis of Green Fuels)

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Abstract

Nickel-based catalysts promoted by Mo-oxo species have been proven to be quite promising for transformation of triglycerides into green diesel. The selection of the support for such catalysts is crucial. In the present study, pyrolyzed rice husk subjected to acid and/or alkaline post-treatment was studied as support for the aforementioned catalysts. Biochar produced by slow pyrolysis of raw material at 850 °C for 5 h under limited-oxygen conditions exhibited the most promising textural characteristics. These were substantially improved by alkaline post-treatment. Thus, the corresponding MoNi catalysts proved the most efficient for upgrading used cooking oil (UCO) to green diesel via a solvent-free hydrotreatment process, performed in a semi-batch reactor (at 310 °C, 40 bar, 100 mL/min H₂, 100 mL UCO and 1 g of catalyst). The enhanced catalytic performance (complete conversion of UCO and 32 wt.% green diesel yield) of MoNi catalysts supported on biochar subjected at least to an alkaline post-treatment step has been attributed to their high SSA, suitable pore size distribution (enhanced mesoporosity), and acidity (enhanced population of acid sites with moderate strength), as well as to the high dispersion of the active phase.

Keywords: green diesel; biochar; Ni based catalysts; hydrotreatment; HVO; rice husk

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MDPI and ACS Style

Kordouli, E.; Vourtsani, P.-I.; Mourgkogiannis, N.; Zafeiropoulos, J.; Bourikas, K.; Kordulis, C. Green Diesel Production Catalyzed by MoNi Catalysts Supported on Rice Husk Biochar. Catalysts 2024, 14, 865. https://doi.org/10.3390/catal14120865

AMA Style

Kordouli E, Vourtsani P-I, Mourgkogiannis N, Zafeiropoulos J, Bourikas K, Kordulis C. Green Diesel Production Catalyzed by MoNi Catalysts Supported on Rice Husk Biochar. Catalysts. 2024; 14(12):865. https://doi.org/10.3390/catal14120865

Chicago/Turabian Style

Kordouli, Eleana, Panagiota-Iliana Vourtsani, Nikolaos Mourgkogiannis, John Zafeiropoulos, Kyriakos Bourikas, and Christos Kordulis. 2024. "Green Diesel Production Catalyzed by MoNi Catalysts Supported on Rice Husk Biochar" Catalysts 14, no. 12: 865. https://doi.org/10.3390/catal14120865

APA Style

Kordouli, E., Vourtsani, P. -I., Mourgkogiannis, N., Zafeiropoulos, J., Bourikas, K., & Kordulis, C. (2024). Green Diesel Production Catalyzed by MoNi Catalysts Supported on Rice Husk Biochar. Catalysts, 14(12), 865. https://doi.org/10.3390/catal14120865

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Green Diesel Production Catalyzed by MoNi Catalysts Supported on Rice Husk Biochar

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