Carbon Nanofiber Supported Transition-Metal Carbide Catalysts for the Hydrodeoxygenation of Guaiacol

Hydrodeoxygenation (HDO) studies over carbon nanofiber‐supported (CNF) W2C and Mo2C catalysts were performed on guaiacol, a prototypical substrate to evaluate the potential of a catalyst for valorization of depolymerized lignin streams. Typical reactions were executed at 55 bar hydrogen pressure ove...

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Vydáno v:ChemCatChem Ročník 5; číslo 10; s. 2964 - 2972
Hlavní autoři: Jongerius, Anna L., Gosselink, Robert W., Dijkstra, Jelmer, Bitter, Johannes H., Bruijnincx, Pieter C. A., Weckhuysen, Bert M.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Weinheim WILEY-VCH Verlag 01.10.2013
WILEY‐VCH Verlag
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Témata:
aromatic chemicals
carbides
conversion
depolymerization
fast pyrolysis
guaiacol
hydrodeoxygenation
hydrogenolysis
lignin
lignin model compounds
molybdenum nitride catalysts
organosolv lignin
phenols
reaction network
vegetable-oils
ISSN:1867-3880, 1867-3899
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Shrnutí:Hydrodeoxygenation (HDO) studies over carbon nanofiber‐supported (CNF) W2C and Mo2C catalysts were performed on guaiacol, a prototypical substrate to evaluate the potential of a catalyst for valorization of depolymerized lignin streams. Typical reactions were executed at 55 bar hydrogen pressure over a temperature range of 300–375 °C for 4 h in dodecane, using a batch autoclave system. Combined selectivities of up to 87 and 69 % to phenol and methylated phenolics were obtained at 375 °C for W2C/CNF and Mo2C/CNF at >99 % conversion, respectively. The molybdenum carbide‐based catalyst showed a higher activity than W2C/CNF and yielded more completely deoxygenated aromatic products, such as benzene and toluene. Catalyst recycling experiments, performed with and without regeneration of the carbide phase, showed that the Mo2C/CNF catalyst was stable during reusability experiments. The most promising results were obtained with the Mo2C/CNF catalyst, as it showed a much higher activity and higher selectivity to phenolics compared to W2C/CNF. Get off O′Me: Hydrodeoxygenation of guaiacol over W2C and Mo2C supported on carbon nanofibers was studied. These catalysts display high activities and selectivities towards phenol and cresols in comparison to previously reported CoMo/Al2O3 catalysts. Catalyst recycling experiments showed that the Mo2C/CNF catalyst is stable under reaction conditions and can be reused without further treatment (CNF=carbon nanofiber).
Bibliografie:Netherlands Ministry of Education, Culture and Science
ArticleID:CCTC201300280
Netherlands Ministry of Economic Affairs
istex:B909B1BB2276E05E0365A9FC1BD435AB9D222C7B
ark:/67375/WNG-H7JC2W7B-X
These authors contributed equally to this work.
ObjectType-Article-1
SourceType-Scholarly Journals-1
content type line 14
ISSN:1867-3880
1867-3899
DOI:10.1002/cctc.201300280