微波辅助预处理水稻秸秆纤维素的工艺研究VIP免费

微波辅助预处理稻秆纤维素地工艺研究摘要纤维素是地球上最丰富地多糖，全世界秸杆或木质纤维类生物质能约相当于 640亿吨石油，是目前世界上少数可预测地能够为人类持续提供能源地资源 .利用纤维素水解产物经发酵生产乙醇为纤维素资源化利用提供了很好地途径 .纤维素材料地预处理是生产可发酵还原糖地关键步骤，该步骤地优化可提高纤维素地水解率，进而提高还原糖产量.本文考察了水稻秸秆在微波作用下，不同微波功率、作用时间以及不同质量分数地 NaOH和催化剂 Na2S对预处理效果地影响，利用分光光度计对预处理过地稻秆滤液进行吸光度测定，扫描电镜（SEM）对未经任何处理、经 0.5%NaOH微波中火加热 5min后、经 0.5%NaOH和0.2%Na2S微波中火加热 5min后地水稻秸秆表面微观形貌进行观察，并对其进行了酶解及还原糖浓度测定 .结果表明：经 NaOH和Na2S溶液预处理以后地水稻秸秆，可发酵还原糖产量得到提高，SEM图片显示预处理后稻杆地表面结构受到不同程度地破坏 .在微波功率为中火，加热5min地条件下， NaOH质量分数为0.5%、催化剂 Na2S质量分数为 0.2%时，对水稻秸秆地预处理效果较好，还原糖浓度达到 51.52g/L.关键词微波；预处理；稻秆；还原糖Research on the processes of pretreatment to rice straw cellulose with microwave-assistedAbstractCellulose is the most abundant polysaccharide.The straw or lignocellulose translocated biomass energy, equivalent to about 64 million tons of oil, is the only predicted resource of the world which could continue providing human resources of energy at present. Cellulose hydrolysis used by fermentation way into ethanol production provides a good way for cellulose utilization. Fiber material pretreatment is a key process in the production of ethanol,cellulose hydrolysis can be increased through these steps of optimization, and then improve the fermentable reducing sugar production.Based on the study of rice straw pretreatment under different mass fraction of NaOH and catalyst Na2S with microwave.The absorbance of pretreated rice straw filtrate were determined by spectrophotometer. The...