화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.28, No.11, 2156-2162, November, 2011
DOI10.1007/s11814-011-0093-6  Export Citation
Sequential hydrolysis of hemicellulose and lignin in lignocellulosic biomass by two-stage percolation process using dilute sulfuric acid and ammonium hydroxide
Tae Hyun Kim1, 2, †
  • 1Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA 50011, United States, USA
  • 2Department of Natural Resource Ecology and Management, Iowa State University, Ames, IA 50011, United States, USA
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To obtain the total fractionation and pretreatment of the corn stover, two-stage percolation process was investigated. This process consists of two steps: use of 0.07 wt% sulfuric acid for hemicellulose recovery in first stage and ARP (ammonia recycled percolation) in the following stage for lignin recovery. Among tested conditions, the best conditions of two-stage process were as follows: 1st stage; 170 ℃, 2.5 ml/min, 30 minutes using 0.07 wt% sulfuric acid and 2nd stage; 170 ℃, 5.0 ml/min, 60minutes using 15 wt% ammonium hydroxide. At above two-stage treatment conditions, the hemicellulose in corn stover was easily hydrolyzed (95%) and recovered with high yields (86%) and the extent of the lignin removal was 81%. After two-stage process, the treated biomass contained nearly pure glucan (85%). Two-stage treatment brought about enzymatic digestibility of 90% and 89% with 60 and 15 FPU/g glucan cellulase enzyme loadings, respectively.
Keywords:Corn Stover;Enzymatic Hydrolysis;Lignin;Xylooligosaccharides;Bioethanol
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