期刊
CHEMCATCHEM
卷 5, 期 10, 页码 2964-2972出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201300280
关键词
carbides; guaiacol; hydrodeoxygenation; lignin; phenols
资金
- Netherlands Ministry of Economic Affairs
- Netherlands Ministry of Education, Culture and Science
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 55bar hydrogen pressure over a temperature range of 300-375 degrees C for 4h in dodecane, using a batch autoclave system. Combined selectivities of up to 87 and 69% to phenol and methylated phenolics were obtained at 375 degrees 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.
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