Cellulose–hemicellulose and cellulose–lignin interactions in wood pyrolysis at gasification temperature

✍ Scribed by T. Hosoya; H. Kawamoto; S. Saka

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 644 KB
• Volume: 80
• Category: Article
• ISSN: 0165-2370
• DOI: 10.1016/j.jaap.2007.01.006

✦ Synopsis

Cellulose-hemicellulose and cellulose-lignin interactions during pyrolysis at gasification temperature (800 8C) were investigated with various cellulose samples mixed with hemicellulose (glucomannan or xylan) or milled wood lignin. Significant interactions were observed in celluloselignin pyrolysis; lignin inhibited the thermal polymerization of levoglucosan formed from cellulose and enhanced the formation of the low molecular weight products from cellulose with reduced yield of char fraction; cellulose reduced the secondary char formation from lignin and enhanced the formation of some lignin-derived products including guaiacol, 4-methyl-guaiacol and 4-vinyl-guaiacol. Comparatively weak interactions were also observed in cellulose-hemicellulose pyrolysis. Finally, factors influencing the wood pyrolysis at gasification temperature are discussed.