Production of Xylose from Diluted Sulfuric Acid Hydrolysis of Wheat Straw
Production of Xylose from Diluted Sulfuric Acid Hydrolysis of Wheat Straw
复制标题
麦秆稀硫酸水解生产木糖
DOI：
10.15376/biores.12.4.7084-7095
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发表时间：
2017-01-01
期刊：
影响因子：
1.5
通讯作者：
Saeed, Haroon A. M.
中科院分区：
文献类型：
--
作者：
Ji, Xingxiang;Ma, Hao;Saeed, Haroon A. M.
以小麦秸秆为原料，采用硫酸水解法制备可发酵木糖，并研究半纤维素去除对未水解固体残渣（USR）理化性质的影响。考察了硫酸浓度、反应温度、反应时间等反应条件对木糖产率和USR的影响。木糖的最佳水解条件为：在140 ℃下，COS用量为0.5%，水解时间为90 min，木糖得率为0.185 g/g麦草。傅里叶变换红外光谱（FTIR）和X射线衍射（XRD）分析表明，在温和条件下，酸水解仅引起麦草官能团和晶型的轻微变化，而较高的温度或较高的COS会加剧这些变化。
The objectives of this study were to generate fermentable xylose by sulfuric acid hydrolysis of wheat straw and investigate the effect of hemicellulose removal on the physical and chemical properties of the unhydrolyzed solid residue (USR). Different reaction conditions, including concentration of sulfuric acid (COS), temperature, and time, were tested for their effects on the yield of xylose and the USR. The ideal hydrolysis conditions for xylose production were 0.5% of COS at 140 degrees C for 90 min, with the xylose yield of 0.185 g/g wheat straw. The Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) analyses showed that the acid hydrolysis only caused slight changes in the functional groups and the crystal form of wheat straw at mild conditions, while higher temperature or higher COS exacerbated these changes.