稻草秸秆硫酸水解研究

Study on the Sulfuric Acid Hydrolysis of Rice Straw

[目的]优化稻草秸秆浓硫酸水解法的条件。[方法]在单因素试验的基础上,固定稻草秸秆粒度为20~40目,以液固比（V/W）、硫酸质量分数、反应温度和反应时间4个因素进行正交试验。[结果]4个因素对稻草秸秆水解率的影响程度为：硫酸质量分数〉液固比〉反应温度〉反应时间。稻草秸秆的最佳水解条件为：硫酸质量分数70%,液固比（V/W）12∶1,反应温度70℃,反应时间为3 h。在此条件下,稻草秸秆水解率达77%以上。[结论]该研究为综合开发利用稻草秸秆奠定了基础。

[Objective] The research aimed to optimize the concentrated sulfuric acid hydrolysis conditions of rice straw.[Method] Based on the single factor test,the liquid-solid ratio（V/W）,the mass fraction of sulfuric acid,the reaction temperature and the reaction time were selected to do the orthogonal experiment when the particle size of rice straw was during 20-40 screen mesh.[Result] The effect degree of four factors on the hydrolytic ratio was the mass fraction of sulfuric acid liquid-solid ratio reaction time reaction temperature.The optimum hydrolysis condition of rice straw was： mass fraction of sulfuric acid 70%,liquid-solid ratio12∶ 1,reaction time 3 h and reaction temperature 70 ℃.The hydrolytic ratio of rice straw reached above 77% in the condition.[Conclusion] The research provided the basis for the comprehensive exploitation and utilization of rice straw.