Vanillin hydrodeoxygenation: Kinetic modelling and solvent effect

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Alexandrina Sulman, Päivi Mäki-Arvela, Louis Bomont, Vyacheslav Fedorov, Moldir Alda-Onggar, Annika Smeds, Jarl Hemming, Vincenzo Russo, Johan Wärnå, Mats Käldström, Dmitry Yu. Murzin
Publisher: Springer
Publication year: 2018
Journal: Catalysis Letters
Journal acronym: Catal. Lett.
Volume number: 148
Issue number: 9
Start page: 2856
End page: 2868
Number of pages: 13
ISSN: 1011-372X
eISSN: 1572-879X


Abstract

Vanillin hydrodeoxygenation was investigated using Pt/C catalyst in the temperature and total pressure ranges of 80-200 A degrees 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 A degrees 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 A degrees 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.


Keywords

Hydrodeoxygenation, Kinetic modelling, Vanillin

Last updated on 2019-14-12 at 03:16