Vanillin Hydrodeoxygenation: Kinetic Modelling and Solvent Effect

Vanillin hydrodeoxygenation was investigated using Pt/C catalyst in the temperature and total pressure ranges of 80–200 °C and 20–30 bar in several solvents, such as tetrahydrofuran, 2-propanol, water and in solventless conditions using 1:1 mass ratio of vanillin to guaiacol. The results revealed th...

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Published inCatalysis letters Vol. 148; no. 9; pp. 2856 - 2868
Main Authors Sulman, Alexandrina, Mäki-Arvela, Päivi, Bomont, Louis, Fedorov, Vyacheslav, Alda-Onggar, Moldir, Smeds, Annika, Hemming, Jarl, Russo, Vincenzo, Wärnå, Johan, Käldström, Mats, Murzin, Dmitry Yu
Format Journal Article
LanguageEnglish
Published New York Springer US 01.09.2018
Springer
Springer Nature B.V
Subjects
Catalysis
Catalysts
Chemistry
Chemistry and Materials Science
Conversion
Deoxygenation
Industrial Chemistry/Chemical Engineering
Modelling
Organometallic Chemistry
Physical Chemistry
Polarity
Selectivity
Solvent effect
Solvents
Tetrahydrofuran
Thermodynamics
Vanillin
Hydrodeoxygenation
Kinetic modelling
Vanillin
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Summary:Vanillin hydrodeoxygenation was investigated using Pt/C catalyst in the temperature and total pressure ranges of 80–200 °C and 20–30 bar in several solvents, such as tetrahydrofuran, 2-propanol, water and in solventless conditions using 1:1 mass ratio of vanillin to guaiacol. The results revealed that the rate increased with increasing solvent polarity as follows: tetrahydrofuran < 2-propanol < water. The main product was p -creosol with 66% selectivity at complete vanillin conversion in HDO under 30 bar total pressure at 100 °C after 4 h using water as a solvent. In a solventless experiment with 1:1 mass ratio of vanillin–guaiacol as a feedstock only vanillin was transformed to p -creosol with 91% conversion in 4 h at 200 °C under 30 bar total pressure, while guaiacol did not produce any HDO products. Both thermodynamic analysis and kinetic modelling were performed. Vanillin hydrodeoxygenation resulted in formation of p -creosol over Pt/C catalyst using an optimum vanillin initial concentration in water solution. From the industrial point of view vanillin hydrodeoxygenation proceeded rapidly giving high yields of p -creosol in solventless hydrodeoxygenation of vanillin-guaiacol mixture, while guaiacol was not deoxygenated. Graphical Abstract
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-018-2478-1