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Vol. 27 No. 6 (2015): Vol 27 Issue 6

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Effects of Liquid-to-Solid Ratio and Reaction Time on Dilute Sulfuric Acid Pretreatment of Achnatherum splendens

https://doi.org/10.14233/ajchem.2015.17803
J. Ren
School of Environmental and Municipal Engineering, Institute of Environmental Ecology, Lanzhou Jiaotong University, Lanzhou 730070, P.R. China; Engineering Research Center for Cold and Arid Regions Water Resource Comprehensive Utilization, Ministry of Education, Lanzhou 730070, P.R. China
L. Tao
School of Environmental and Municipal Engineering, Institute of Environmental Ecology, Lanzhou Jiaotong University, Lanzhou 730070, P.R. China; Engineering Research Center for Cold and Arid Regions Water Resource Comprehensive Utilization, Ministry of Education, Lanzhou 730070, P.R. China
T.R. Ni
School of Environmental and Municipal Engineering, Institute of Environmental Ecology, Lanzhou Jiaotong University, Lanzhou 730070, P.R. China; School of Environmental Science and Engineering, Nankai University, Tianjin 300100, P.R. China

Corresponding Author(s) : J. Ren

renjun@mail.lzjtu.cn

Asian Journal of Chemistry, Vol. 27 No. 6 (2015): Vol 27 Issue 6

Abstract

In sulfuric acid pretreatment of Achnatherum splendens, the ground biomass was pretreated by 0.5-3 % (w/v) sulfuric acid with 8:1-20:1 (v/w) of liquid-to-solid ratio at 100 °C for 1-4 h. Increasing sulfuric acid concentration, liquid-to-solid ratio and reaction time had significant effects on hemicellulose solubilization. Increasing the sulfuric acid concentration, liquid-to-solid ratio and reaction time caused significant decrease in hemicellulose and significant increase in formation of cellulose and lignin. The optimum treatment conditions of sulfuric acid pretreatment for Achnatherum splendens were 2 % (w/v) sulfuric acid, 15:1(v/w) of liquid-to-solid ratio, 3 h of reaction time and temperature 100 °C. Under these conditions, 92.57 % hemicellulose was solubilized and the content of cellulose in pretreated solids increased to 66.79 %. This study can serve as a step towards the optimization of pretreatment of Achnatherum splendens.

Keywords

Sulfuric acid pretreatment Hemicellulose solubilization Hemicellulose Cellulose
Ren, J., Tao, L., & Ni, T. (2015). Effects of Liquid-to-Solid Ratio and Reaction Time on Dilute Sulfuric Acid Pretreatment of Achnatherum splendens. Asian Journal of Chemistry, 27(6), 2133–2136. https://doi.org/10.14233/ajchem.2015.17803
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