Journal
FUEL PROCESSING TECHNOLOGY
Volume 134, Issue -, Pages 46-51Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.fuproc.2014.12.017
Keywords
Lignin; Tungsten carbide; MCM-41; Monocyclic arenes; Catalytic fast pyrolysis
Funding
- Chinese Academy of Sciences [KGZD-EW-304-3]
- National Basic Research Program of China [2013CB228103]
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W2C/MCM-41-catalyzed upgrading of vapors from fast pyrolysis of lignin was investigated with the aim of arene production. The experiments were conducted in a micro pyrolyzer-gas chromatography/mass spectrometer (P-GC/MS). A series of W2C/MCM-41 catalysts with different catalyst loading amount (Si/W) were prepared and the activity, selectivity, and stability of the catalysts were investigated. Associated with the analysis results of P-GC/MS for the pyrolysis vapors, the optimal condition for producing arenes was found. Besides, possible mechanisms for lignin conversion with the as-prepared catalysts were discussed. In the presence of W2C/MCM-41 (Si/W = 50), the arenes yield is about 20% of volatile product and the selectivity for monocyclic arenes is over 85% at 750 degrees C. The yield of arenes increases significantly with the increase of catalyst-to-lignin mass ratio (C/L). According to the run tests, the conversion of arenes decreases slightly by 1% or 2% after each run, indicating that the catalyst features good stability under the experimental conditions. Thus, W2C/MCM-41 catalysts effectively catalyzed the formation of monocyclic arenes in the fast pyrolysis process. (C) 2014 Elsevier B.V. All rights reserved.
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