Fractionation of barley straw with dilute sulfuric acid for improving hemicellulose recovery

Kyung Yoen Won, Byung Hwan Um, Seung Wook Kim, Kyeong Keun Oh

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14 Citations (Scopus)


Dilute acid fractionation of barley straw improves dissolving hemicellulose fraction of the straw, while leaving the cellulose more reactive and accessible to enzyme as a strategy of pretreatment. To characterize the fractionation process, the effects of the acid concentration, temperature and reaction time on the hemicellulose removal as well as on the formation of by-products (furfural, 5-hydroxymethylfurfural and acetic acid) were investigated. The optimum fractionation conditions of barley straw were 1% (w/v) concentration of sulfuric acid, 158 °C of reaction temperature and 15 min of reaction time. Under the optimum conditions, 87% of xylan was hydrolyzed and recovered in liquid hydrolyzate, which was 7% higher than that of the predicted yield. The hydrolyzate contained glucose 2.44 g/L, arabinose 1.70 g/L, xylose 13.41 g/L, acetic acid 1.55 g/L, levulinic acid 0.03 g/L, 5-HMF 0.03 g/L and furfural 0.75 g/L.

Original languageEnglish
Pages (from-to)614-620
Number of pages7
JournalKorean Journal of Chemical Engineering
Issue number5
Publication statusPublished - 2012 May

Bibliographical note

Funding Information:
This study was supported by the Technology Development Program (# 309016-5) for the Agriculture and Forestry units of the Ministry of Food, Agriculture, Forestry, and Fisheries of Korea.


  • Barley Straw
  • Hemicellulose
  • Pretreatment
  • Response Surface Methodology (RSM)
  • Sugar Decompositions

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)


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