Sulfur balance of sulfur dioxide-ethanol-water fractionation of sugarcane straw

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

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)


The sulfur balance of SO2-ethanol-water (AVAP®) fractionation of sugarcane (SC) straw was investigated. Hydrogen sulfite and sulfite anions are nearly absent in the liquors, despite cations present in straw, whose effect is thus limited to neutralization of lignosulfonic acids decreasing the acidity. Higher degree of sulfonation was observed for dissolved straw lignin compared to wood lignin (0.8–0.9 vs. 0.25 S/C9). Sulfur dioxide amounts of 0.9–1.2, 4.1–4.3 and 44–49 g per o.d. kg straw were bound to pulp, precipitated lignin and lignosulfonic acid, respectively, while the rest of SO2 was recovered by distillation from the spent fractionation suspensions.

Original languageEnglish
Pages (from-to)998-1002
Number of pages5
JournalBioresource Technology
Publication statusPublished - 1 Oct 2017
MoE publication typeA1 Journal article-refereed


  • AVAP® process
  • Mass balance
  • SO recovery
  • SO-ethanol-water fractionation
  • Sugarcane straw

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