COMPARISON OF HYDROTHERMAL,ORGANOSOLV AND HYDROTROPIC PRETREATMENTS OF EUCALYPTUS FOR ENHANCING ENZYMATIC SACCHARIFICATION
In this work,effects of hydrothermal,organosolv and hydrotropic pretreatments on improving enzymatic hydrolysis of bamboo were comprehensively compared.Hydrotropic pretreatment was more effective in removal lignin and xylose from bamboo fiber cell wall.However,the surface coverage by lignin and extractives were dramatically displaced during organosolv pretreatment as investigation by X-ray photoelectron spectroscopy(XPS).After pretreatments,the crystallinity of cellulose in pretreated substrates has a significant reduction,and pores were exposed on fiber surface.The residual content of acetyl and phenolic groups in hydrotropic pretreated substrates is lower than organosolv pretreated substrates.In order to deeply assess the delignification of pretreatments,the isolated lignins obtaining from pretreatments process were characterized by Fourier transform infrared spectroscopy(FTIR)also.It was revealed that hydrotropic lignin contained more phenolic hydroxyl group and syringyl units than organosolv lignin.Compared to hydrothermal and organosolv pretreatment,cellulase adsorption capacity of pretreated substrates was notably improved by hydrotropic pretreatment,which indicating the better enzyme accessibility of cellulose.Eventually,the maximum glucose yield was obtained from hydrotropic pretreated substrates.
Hongyan Mou Shubin Wu
State Kay Laboratory of Pulp and Paper Engineering,South China University of Technology Guangzhou,510640,China
国际会议
第五届制浆造纸新技术国际研讨会(ISETPP)暨第三届国际造纸与环境学术大会(IPEC)
广州
英文
1-5
2016-11-07（万方平台首次上网日期，不代表论文的发表时间）