离子液体预处理生物质提高糖化产率

Pretreatment of Biomass with Ionic Liquid to Improve Saccharification Yield

采用酶解糖化法检测离子液体EmimAc和AmimCl对生物质(甘蔗渣和桉木)的预处理效果,考察了温度、时间和固/液质量比对离子液体预处理效果的影响。结果表明,2种离子液体对2种生物质的最佳预处理温度均为140℃,固液质量比均为1∶15,EmimAc对桉木和甘蔗渣的预处理时间分别是12和4 h,而AmimCl所需的时间分别是14和8 h,EmimAc对桉木和甘蔗渣的预处理效果分别是传统方法的13.931和3.886倍,而AmimCl对这2种生物质分别是传统方法的4.665和2.835倍。可见EmimAc的预处理效果优于AmimCl。

The effect of pretreating biomass （bagasse/eucalyptus） with ionic liquids （ILs） EmimAc and AmimC1 has been explored by assessing the saccharification yield. Factors including temperature, time and solid-to-liquid ratio have been investigated. The results indicate that two ILs produce the best results for the two kinds of biomass at 140 ℃ when the solid-to-liquid ratio is 1 ： 15. For EmimAc, the optimum pretreatment time is 12 h for eucalyptus, and 4 h for bagasse, respectively. For AmimCl, the optimum pretreatment time is 14 h for eucalyptus, and 8 h for bagasse, respectively. The saccharification yields of EminAc pretreated eucalyptus and bagasse are 13. 931 and 3.886 times those of traditional methods, respectively. For AmimC1, the saccharification yields ars imoroved to 4. 665 and 2. 835 times, respectively. The results show that EmimAc exhibits a better pretreatment effect than AmimCl.