高温液态水法水解稻秆的试验研究  

EXPERIMENTAL STUDY ON RICE STRAW HYDROLYSIS BY HOT LIQUID WATER

作　　者：徐明忠[1,2] 庄新姝[1] 袁振宏[1] 吴创之[1] 马隆龙[1] 

机构地区：[1]中国科学院广州能源研究所,中国科学院可再生能源与天然气水合物重点实验室,广州510640 [2]中国科学院研究生院,北京100039

出　　处：《太阳能学报》2009年第8期1145-1149,共5页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(50776093);中国科学院知识创新工程项目(KSCX2-YW-G-063;KSCX1-YW-11-A3)

摘　　要：以广州郊区的稻秆为原料,利用自行设计的小型反应器,以高温液态水的预处理方法,考查了反应时间、温度、压力、液固比、搅拌转速以及预热时间对稻秆水解的影响。实验结果发现:在200℃,压力为4.0MPa,液固比为20∶1,搅拌转速500r/min,预热时间为40min时还原糖浓度达到最大值,还原糖转化率为51.85%,原料转化率达到48.18%。通过范氏分析及扫描电镜对此工况下的水解残渣进行了分析,发现半纤维素水解率达到88.90%,预处理后的原料疏松,孔隙增加,因而能够较大程度地提高后续纤维素酶水解的效率。Rice straw is one of the most abundant agricultural residues in south China without effective utilization yet. The local rice straw of Guangzhou was chosen as raw materials, the influence factors including reaction temperature, reaction time, pressure, liquid solid ratio, rotate speed and preheating time were investigated with hot liquid water method. The experimental results indicate that the optimal conditions are： 200℃, 10minutes, 4.0MPa, 20：1, 500r/min and preheat- ing 40minutes, in which the reducing sugars yield reaches to 51.85 % and the conversion ratio of raw material is 48. 18%. Then the residue was explored by SEM and van Soest method. It was concluded that the hot liquid water method could be an available way to pretreat the rice straw for downstream enzymy hydrolysis.

关 键 词：高温液态水 稻秆 水解 预处理 

分 类 号：TK513.5[动力工程及工程热物理—热能工程]