KINETICS STUDY OF 2nd HYDROLYSIS IN CONCENTRATED H2SO4 HYDROLYSIS PROCESS BY 1H-NMR SPECTROSCOPY
Lignocellulosic biomass resources are abundant, renewable, and inexpensive energy sources. Those are mainly composed of cellulose, hemicellulose, and lignin; the contents vary according to plant species. To make this structure suitable for conversion in fermenting process, cellulose and hemicellulose must be hydrolyzed. When hydrolyzed, these lignocellulosic materials produce sugars (D-glucose, D-galactose, Dmanose, D-xylose, and L-arabinose) and several compounds derived from sugar and lignin degradation (furfural, hydroxymethylfurfural (HMF), acetic acid, syringic acid,p-hydroxybenzoic acid, vanillin, and other compounds). Those lignocellulosic hydrolyzates can be used as fermentation media to obtain xylitol, ethanol, and other useful products. However, the byproducts produced during hydrolysis negatively affect not only fermentation efficiency, but also quantitative analysis of reaction products and kinetic studies. In this study, authors tried to apply 1H-NMR spectroscopy for quantitative analysis of reaction products and its kinetics without hydrolyzates neutralization. As increasing the 2nd stage acid hydrolysis temperature from 100 to 110 or 120°C, significant amounts of xylose were converted to furfural or other condensation products.
kinetic study acid hydrolysis 1H-NMR spectroscopy formic acid furfural
S.-J. Shin D.-H. Cho Y.-H. Kim Y.-J. Sung B.-R. Kim Nam-Seok Cho
Department of Wood and Paper Science, Chungbuk National University, Chungbuk 361-763, Korea Department of Chemical Engineering, Kwangwoon University, Seoul 139-701, Korea Department of Biobased Materials, Chungnam National University, Daejun, 305-764, Korea
国际会议
16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)
天津
英文
885-888
2011-06-08（万方平台首次上网日期，不代表论文的发表时间）