Kinetics of SO2-ethanol-water (AVAP®) fractionation of sugarcane straw

Xiang You, Adriaan van Heiningen, Herbert Sixta, Mikhail Iakovlev*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)


Kinetics of SO2-ethanol-water (AVAP®) fractionation was determined for sugarcane (SC) straw in terms of pulp composition (non-carbohydrate components, cellulose, hemicelluloses) and properties (kappa number, pulp intrinsic viscosity in CED and cellulose degree of polymerization). Effect of temperature (135-165 °C) and time (18-118 min) was studied at fixed liquor composition (SO2/ethanol/water = 12:22.5:65.5, w/w) and a liquor-to-solid ratio (4 L kg-1). Interpretation is given in terms of major fractionation reactions, removal of non-carbohydrate components and xylan, as well as acid hydrolysis of cellulose, and is compared to other lignocellulosic substrates (beech, spruce and wheat straw). Overall, SO2-ethanol-water process efficiently fractionates SC straw by separating cellulose from both non-carbohydrate components and xylan while reducing cellulose DP.

Original languageEnglish
Pages (from-to)111-119
Number of pages9
JournalBioresource Technology
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed


  • AVAP® process
  • Biofuels
  • Biorefinery
  • SO-ethanol-water fractionation
  • Sugarcane straw


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