表面活性剂耦合离子液体对稻秆酶解糖化的影响

酶解糖化是木质纤维素材料制备生物质乙醇的关键环节,因此提高稻秆等木质纤维素材料的酶解糖化效率具有重要意义。以稻秆为原料,采用表面活性剂耦合离子液体为预处理方法,考察预处理温度、时间、表面活性剂的添加比例对稻秆酶解的影响。结果表明,预处理温度为110℃、时间为60 min、表面活性剂添加比例为1%,稻秆的酶解效果最佳,与单独离子液体处理的稻秆相比,纤维转化率可提高8%～15%。同时分别通过稻秆成分分析、FTIR、XRD、SEM等对预处理前后的稻秆结构进行表征,证实预处理后酶解效率提高的合理性。

Effect of surfactant-assisted ionic liquid pretreatment on enzymatic hydrolysis of rice straw

The enzymatic hydrolysis of lignocellulosic materials is a key stage for fuel ethanol production. Therefore, the pretreatment of lignocellulosic materials (as rice straw) is important to enhance the enzymatic hydrolysis saccharification. In this study, the rice straw was used as raw material and pretreatment by surfactant-assisted ionic liquid. Effects of pretreatment temperature and time, and adding proportion of surfactants on the enzymatic hydrolysis of rice straw were investigated. According to the result, the optimal condition for enzymatic hydrolysis of rice straw was at 110℃ for 60 min with 1% surfactants. To compare with the ionic liquid pretreatment of rice straw, cellulose conversion was increased by 8%—15%. The improvement of enzymatic hydrolysis was confirmed by rice straw composition analysis, FTIR, XRD, SEM of untreated and pretreated rice straw.