离子液体和酶法两步预处理稻壳制备稻壳炭  

Rice husk charcoal was prepared by two-step rice husk pretreatment by ionic liquid and enzyme method

作　　者：干建松[1,2] 陈家云 GAN Jiansong;CHENG Jiayun(School of Grain and Food&Pharmacy,Jiangsu Vocational College of Finance&Economics,Huai'an 223003,China;College of Chemical Engineering,China University of Mining and Technology,Xuzhou 221116,China;College of Life Science and Food Engineering,Huaiyin Institute of Technology,Huai'an 223003,China)

机构地区：[1]江苏财经职业技术学院粮食与食品药品学院,江苏淮安223003 [2]中国矿业大学化工学院,江苏徐州221116 [3]淮阴工学院生命科学与食品学院,江苏淮安223003

出　　处：《扬州大学学报（农业与生命科学版）》2021年第6期131-137,共7页Journal of Yangzhou University：Agricultural and Life Science Edition

基　　金：国家自然科学基金青年基金项目(21606097);淮安市重大成果转化项目(HAN201803),淮安市自然科学研究计划项目(HAB202068)。

摘　　要：采用离子液体和酶法两步处理稻壳,可提高稻壳表面微孔结构。第1步,采用离子液体1-己基-3-甲基咪唑六氟磷酸盐在50℃、pH 4.5的条件下处理稻壳36 h,稻壳降解率达11.66%;第2步,在第1步处理的基础上采用酶活性为10 U的木质素酶在40℃、pH 4.5的条件下再处理36 h,接着用酶活性比为4.5:8.5的半纤维素酶与纤维素酶在30℃、pH 4.5的件下处理24 h,木质素、纤维素和半纤维素总降解率达38.89%。将两步处理后的稻壳,炭化制备成稻壳炭,经扫描电镜观察,稻壳炭表面的微孔结构得到较大的改善。In this study,ionic liquid and enzymatic two-step treatment of rice husk was used to improve the surface microporous structure of rice husk.The first step,the ionic liquid 1-hexyl-3-methylimidazolium hexafluorophosphate was used to degrade rice husks at 50℃,pH 4.5 for 36 h with the degradation rate of 11.66%.The second step,rice husks were further degraded by ligninase with 10 U at 40℃,pH 4.5 for 36 h,and hemicellulase and cellulase with enzyme activity ratio of 4.5:8.5 at 30℃,pH 4.5 for 24 h,the total degradation rate of lignin,cellulose and semimellulose reached 38.89%.Rice husk was carbonized after two steps of degradation.The microporous structure of rice husk charcoal surface was greatly improved by SEM.

关 键 词：稻壳 离子液体 木质素酶 半纤维素酶 纤维素酶 稻壳炭 

分 类 号：TQ920.1[轻工技术与工程—发酵工程]