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bce ›› 2014, Vol. 48 ›› Issue (1): 44-50.doi: 10.3969/j.issn.1673-5854.2014.01.008

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A Review of Biomass Pretreatment Technologies and Their Influences on Pyrolysis Products

HU Hai-tao, LI Yun-chao, WANG Xian-hua, ZHANG Shuai, YANG Hai-ping, CHEN Han-ping   

  1. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2013-01-01 Online:2014-01-30 Published:2014-02-11

Abstract: In this study, the research status of various biomass pretreatment technologies at home and abroad, and their effects on pyrolysis products were reviewed. The advantages and drawbacks of various pretreatment methods were summarized. It was found that microwave drying pretreatment could be an efficient way for drying biomass. The de-ash pretreatment could increase the reaction rate of biomass pyrolysis, and also enrich the carbohydrate content in bio-oils. The torrefaction pretreatment could increase the heating value of bio-oils. In addition, some other new pretreatment technologies for biomass were also reviewed, for example, the ionic liquid pretreatment could reduce the cracking time during pyrolysis, thus enhance the yield of bio-oils. The hydrothermal pretreatment could increase the sugar content (mainly levoglucosan) in bio-oils.

Key words: biomass, pyrolysis, pretreatment, bio-oil

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