摘要
芒草含有80%以上的可降解的纤维素和半纤维素,仅含有19%的不被酸降解的苯环化合物,木质素,适于作为生产燃料乙醇的原料。通过对芒草稀酸水解工艺的正交实验研究,探讨了反应时间、硫酸浓度、原料与硫酸的固液比等因素对纤维素、半纤维素降解为葡萄糖、木糖及总糖含量的影响。结果表明:在121℃条件下,对于纤维素,影响葡萄糖产量的主要因素是硫酸浓度;而对于半纤维素,1.5%的硫酸就可使之降解完全;但在酸浓度较高时,会产生葡萄糖、木糖以外的杂质。
Chinese silvergrass is suitable as materials for producing fuel ethanol due to its high content of decomposable cellulose and hemicellulose, totally more than 80 percent, only 19 percent is unmanageable materials, such as phenyl compounds, lignin. The effects of reaction time, the concentration of sulphuric acid and the rate of feed-stuff to dilute sulphuric acid （the rate of solid to liquid） on Chinese silvergrass hydrolysis were examined by an orthogonal experiment designed through the yield of glucose, xylose and total fermentable sugar from cellulose and hemicellulose. The results showed that when temperature was 121 ℃, the main factors influencing the yield of glucose was the concentration of sulphuric acid; hemicellulose could easily be decomposed with the help of 1.5% sulphuric acid; and some impurities would be produced when the concentration of sulphuric acid was too high.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2006年第6期631-634,共4页
Acta Energiae Solaris Sinica
基金
国家高科技研究发展计划(863)(2003AA514020)
广东省自然科学基金(032707)
关键词
芒草
两步水解
正交实验
Chinese silvergrass
two-step hydrolysis
orthogonal experiment
