Reaction Pathways of Gamma-Valerolactone Hydroconversion over Co/SiO2 Catalyst

Novodárszki, Gyula; Lónyi, Ferenc; Mihályi, Magdolna R.; Vikár, Anna; Barthos, Róbert; Szabó, Blanka; Valyon, József; Solt, Hanna E.

doi:10.3390/catal13071144

Open AccessArticle

Reaction Pathways of Gamma-Valerolactone Hydroconversion over Co/SiO₂ Catalyst

by

Gyula Novodárszki

,

Ferenc Lónyi

^*,

Magdolna R. Mihályi

,

Anna Vikár

,

Róbert Barthos

,

Blanka Szabó

,

József Valyon

and

Hanna E. Solt

Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok Körútja 2, 1117 Budapest, Hungary

^*

Author to whom correspondence should be addressed.

Catalysts 2023, 13(7), 1144; https://doi.org/10.3390/catal13071144

Submission received: 28 June 2023 / Revised: 14 July 2023 / Accepted: 20 July 2023 / Published: 23 July 2023

(This article belongs to the Special Issue Heterogeneous Catalytic Materials: Synthesis, Characterization and Applications for Energetic Purposes, 2nd Edition)

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Abstract

The hydroconversion of γ-valerolactone (GVL) over Co/SiO₂ catalyst proceeds in a complex reaction network, resulting in 2-methyltetrahydrofuran (2-MTHF) as the main product, and C₄–C₅ alcohol and alkane side-products. The catalyst was shown to contain Co⁰ sites and Lewis acid (Co²⁺ ion)/Lewis base (O²⁻ ion) pair sites, active for hydrogenation/dehydrogenation and dehydration reactions, respectively. The initial reaction step was confirmed to be the hydrogenation of GVL to key intermediate 1,4-pentanediol (1,4-PD). Cyclodehydration of 1,4-PD led to the main product 2-MTHF, whereas its dehydration/hydrogenation gave 1-pentanol and 2-pentanol side-products, with about the same yield. In contrast, 2-pentanol was the favored alcohol product of 2-MTHF hydrogenolysis. 2-Butanol was formed by decarbonylation of 4-hydroxypentanal intermediate. The latter was the product of 1,4-PD dehydrogenation. Alkanes were formed from the alcohol side-products via dehydration/hydrogenation reactions.

Keywords: GVL hydroconversion; Co/SiO₂ catalyst; 1,4-pentanediol intermediate; 2-methyltetrahydrofuran; C₄–C₅ alcohols; reaction network

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MDPI and ACS Style

Novodárszki, G.; Lónyi, F.; Mihályi, M.R.; Vikár, A.; Barthos, R.; Szabó, B.; Valyon, J.; Solt, H.E. Reaction Pathways of Gamma-Valerolactone Hydroconversion over Co/SiO₂ Catalyst. Catalysts 2023, 13, 1144. https://doi.org/10.3390/catal13071144

AMA Style

Novodárszki G, Lónyi F, Mihályi MR, Vikár A, Barthos R, Szabó B, Valyon J, Solt HE. Reaction Pathways of Gamma-Valerolactone Hydroconversion over Co/SiO₂ Catalyst. Catalysts. 2023; 13(7):1144. https://doi.org/10.3390/catal13071144

Chicago/Turabian Style

Novodárszki, Gyula, Ferenc Lónyi, Magdolna R. Mihályi, Anna Vikár, Róbert Barthos, Blanka Szabó, József Valyon, and Hanna E. Solt. 2023. "Reaction Pathways of Gamma-Valerolactone Hydroconversion over Co/SiO₂ Catalyst" Catalysts 13, no. 7: 1144. https://doi.org/10.3390/catal13071144

APA Style

Novodárszki, G., Lónyi, F., Mihályi, M. R., Vikár, A., Barthos, R., Szabó, B., Valyon, J., & Solt, H. E. (2023). Reaction Pathways of Gamma-Valerolactone Hydroconversion over Co/SiO₂ Catalyst. Catalysts, 13(7), 1144. https://doi.org/10.3390/catal13071144

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Reaction Pathways of Gamma-Valerolactone Hydroconversion over Co/SiO₂ Catalyst

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