摘要
采用常规加热和微波辐射加热两种方式,比较了不同加热方式对废纸预处理效果的影响。结果表明,微波辐射加热联合酸性溶剂的预处理方式最有利于废纸的水解糖化。经预处理的影响因素考察后,确定最佳预处理条件为:溶剂为H2SO4、浓度5%、微波功率80W,预处理时间40min,固液比3g∶100mL,该条件下对废纸预处理后,与常规加热方式相比还原糖得率提高20%,是去离子水浸泡微波辐射下的88倍。扫描电镜分析结果表明废纸在酸性溶剂中经微波加热处理后,纤维素之间的大分子链断裂,有利于水解过程的进行。
In order to improve the using efficiency of cellulose in waste paper during the preparation of bioethanol,the influence of pretreatment on hydrolysis of waste paper was studied.The influence of different heating on the pretreatment of waste paper was studied.The results proved that microwave pretreatment in acid was most beneficial to hydrolysis and saccharification of the waste paper.Moreover,the influence factors of microwave combined dilute acid on pretreatment were examined,and the crucial factors of microwave pretreatment in acid were determined.The optimum conditions were obtained as follows：H2SO4as solvent,concentration 5%,microwave power 80 W,heating for 40 min,and ratio of solid to liquid 3g∶100mL.The corresponding sugar production rate of waste paper increased about 20%,compared to that in conventional heat way,and 88 times than the rate of waste paper in deionized water heated under microwave.SEM analysis results indicated that macromolecular chain between cellulose of waste paper was broken after microwave pretreatment in acid solution,which was advantageous to the hydrolysis process.
出处
《化工新型材料》
CAS
CSCD
北大核心
2016年第7期55-57,60,共4页
New Chemical Materials
基金
国家“863”项目(2009AA032802/2009AA032803)
关键词
废纸
纤维素
预处理
糖化
waste paper
cellulose
pretreatment
saccharification
