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Journal of Catalysis

Journal of Catalysis

IF: 6.5
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Evaluation of anisole hydrodeoxygenation reaction pathways over a Ni/Al2O3 catalyst

Published:17 May 2024 DOI: 10.1016/j.jcat.2024.115553
Snehasis Dutta , Bogdan Shumeiko , Jaroslav Aubrecht , Kate?ina Karásková , Dagmar Fridrichová , Kate?ina Pacultová , Tomá? Hlin?ík , David Kubi?ka

Abstract

Anisole is a model molecule for studying hydrodeoxygenation (HDO) of lignin-derived oxygenates. Here we elucidate its HDO pathway over 10?% Ni/Al2O3 catalyst. Adsorption experiments showed that anisole is adsorbed on the acidic sites of the Al2O3. Anisole adsorption at 200–300?°C is reactive in nature, and results in its demethylation. The catalyst was tested at 100–300?°C, 5–40?bar H2 pressure. Conversion of 78?% was obtained at 5?bar and 300?°C, restricted by hydrogenation-dehydrogenation equilibrium. HDO mainly starts through the ring-hydrogenation pathway. This is followed by demethoxylation beyond 180?°C. At 5–12?bar, cyclohexane dehydrogenates to benzene. This was confirmed by conducting an HDO experiment with methoxycyclohexane. At lower pressure deoxygenation is favored; and demethylation is accompanied with methylation of the aromatic ring, for temperature >260?°C. Investigation of the initial reaction stages showed that anisole HDO on Ni/Al2O3 catalyst proceeds via two independent pathways i.e., reactive adsorption/(de)methylation and ?aromatic ring hydrogenation.

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Related products
Procduct Name CAS Molecular Formula Supplier Price
Cyclohexane 110-82-7 C6H12 841 suppliers $10.00-$8580.00
Benzene 71-43-2 C6H6 745 suppliers $11.20-$4420.00
Anisole 100-66-3 C7H8O 597 suppliers $7.62-$6444.90
Hydrogen 1333-74-0 H2 129 suppliers $190.00-$6551.74
Cyclohexyl methyl ether 931-56-6 C7H14O 68 suppliers $12.00-$2060.00

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