Journal
FUEL PROCESSING TECHNOLOGY
Volume 159, Issue -, Pages 19-26Publisher
ELSEVIER
DOI: 10.1016/j.fuproc.2017.01.025
Keywords
Biomass; Torrefaction; Catalytic pyrolysis; Aromatics; Olefins; Fluidized-bed
Funding
- National Natural Science Foundation of China [51676045]
- Sino-Thai Cooperation Project from the National Science Foundation of China for international academic exchanges [51561145010]
- Excellent Young Teachers Program of Southeast University [2242016R30005]
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Two-stage fast pyrolysis of pinewood, was investigated with and without catalysts in a fluidized-bed reactor. The method is using low-temperature pyrolysis (torrefaction) to remove unfasiorable compounds firstly and then using high-temperature catalytic pyrolysis to produce hydrocarbons. The effects of torrefaction temperature, residence time and atmosphere on product distribution were investigated. The results show that the acidity of produced liquids reduced with increasing torrefaction temperature and residence time. Torrefaction pretreatment of pinewood reduced the yields of acetic acid and guaiacol effectively during catalytic pyrolysis. The highest aromatic yield was obtained with torrefied pinewood at 250 degrees C, which was boasted 30% of that without torrefaction. Besides, torrefied biomass can obviously reduce coke deposition on ZSM-5 in the catalytic pyrolysis process compared with raw pinewood. Therefore, the two-step pyrolysis can be considered as a more effective and promising method for producing high-quality liquid fuels and chemicals. (C) 2017 Elsevier B.V. All rights reserved.
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