Hydrodeoxygenation of vanillin over carbon supported metal catalysts
2018; Elsevier BV; Volume: 561; Linguagem: Inglês
10.1016/j.apcata.2018.05.010
ISSN1873-3875
AutoresJosé Santos, Moldir Alda‐Onggar, Viacheslav Fedorov, Markus Peurla, Kari Eränen, Päivi Mäki‐Arvela, M.Á. Centeno, Dmitry Yu. Murzin,
Tópico(s)Lignin and Wood Chemistry
ResumoDifferent carbon supported metal catalysts were synthesized, and characterized with various physico-chemical methods and tested in vanillin hydrodeoxygenation under 30 bar total pressure in water as a solvent at 100 °C. The catalysts exhibited high specific surface area and the metal dispersion decreased in following order: Pt/C > Pd/C > Au/C > Rh/C > Ru/C. The most active catalyst was Pd/C followed by Ru/C. Vanillin hydrodeoxygenation proceeded via hydrogenation forming vanillyl alcohol further to its hydrogenolysis forming p-creosol. Both hydrogenation and hydrogenolysis were promoted by Pd/C, which exhibited rather high dispersion. The highest selectivity to p-creosol, 95% at complete vanillin conversion, was obtained with Pd/C. Kinetic modelling of vanillyl alcohol selectivity as a function of vanillin conversion was performed.
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