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

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • University of Maine
  • American Process Inc.

Abstract

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.

Details

Original languageEnglish
Pages (from-to)998-1002
Number of pages5
JournalBioresource Technology
Volume241
Publication statusPublished - 1 Oct 2017
MoE publication typeA1 Journal article-refereed

    Research areas

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

ID: 14387395