期刊
APPLIED CATALYSIS A-GENERAL
卷 561, 期 -, 页码 137-149出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2018.05.010
关键词
Vanillin; HDO; Supported metals; Carbon
资金
- Spanish Ministerio de Economia y Competitividad (MINECO) - FEDER funds from the European Union [ENE2013-47880-C3-2-R]
- MINECO [BES-2014-068244]
Different 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 degrees 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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