묽은 황산을 사용하여 볏짚으로부터 헤미셀룰로오스 회수

Abstract

Rice straw was pretreated using dilute sulfuric acid at reaction conditions covering two levels of reaction temperature (140, 150℃) and five levels of acid concentrations (1.0~3.0 %wt). The production and decomposition rates of major components of rice straw indicating glucose, xylose,galactose and arabinose were investigated. The production rate of arabinose and the decomposition rate of xylose were greatest among them. The maximum attainable hemicellulose (xylose+galactose+arabinose) yield was about 80%. High acid concentration appears to favor the maximum yield but high temperature does not. The optimum condition was found to be 140℃, 2.5% and 20 minutes. The maximum glucose yields were almost same, around 16~18%, regardless of reaction conditions.