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Biomass Chemical Engineering ›› 2021, Vol. 55 ›› Issue (3): 1-9.doi: 10.3969/j.issn.1673-5854.2021.03.001

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Effect of Pyrolysis Temperature on Structures of Chars Forming from Cellulose and Lignin

Dichao WU1,2(), Chao CHEN1, Xinglong HOU1, Kang SUN1,*()   

  1. 1. Institute of Chemical Industry of Forest Products, CAF; National Engineering Lab. for Biomass Chemical Utilization; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China
    2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
  • Received:2020-05-18 Online:2021-05-30 Published:2021-05-20
  • Contact: Kang SUN E-mail:18739563802@163.com;sunkang0226@163.com


This work focused with the assistance of the mechanism of pyrolysis carbonization of cellulose, lignin and hemicellulose were analysed by TG, TEM, Raman, XRD, and FT-IR based on the molecular restructuring behavior of three major components of cellulose, lignin and hemicellulose during pyrolysis. The results showed that hemicellulose was completely decomposed during pyrolysis; molecular rearrangement occurred during the pyrolysis of cellulose, forming crystallized areas in biomass char; lignin had a very complex cross-linked structure, melted during pyrolysis, forming amorphous carbon areas in biomass char. During the charring process, cellulose undergone mainly dehydration reactions when the temperature was lower than 200 ℃, and the temperature range of 200 to 400 ℃ was the main stage of pyrolysis; lignin was relatively structurally stable in the studied temperature range(200-500 ℃), with only partial structural transformation occurring while softening and melting.

Key words: cellulose, lignin, pyrolysis mechanism, carbon microcrystallines, amorphous carbon

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