DECRYSTALLIZATION OF CELLULOSE WITH PHOSPHORIC ACID FOLLOWING ENZYMATIC HYDROLYSIS TO PRODUCE FERMENTABLE SUGARS
Microcrystalline cellulose (MCC) was treated with phosphoric acid (>80％) in order to decompose its highly crystalline structure and enhance the following enzymatic hydrolysis procedure of MCC. FTIR, XRD and XPS were used to analyze the structural changes of MCC. It was found that the crystalline index (CrI) of MCC decreased greatly, from 91.23％ to 42.29％ during the decrystallization process. In the consequent enzymatic process in 120 hours, the yield rate of glucose was enhanced from 7.21％ to 24.10％, and the yield rate of total sugars increased from 20.37％ to 65.52％. Phosphoric acid was convenient, safe, inexpensive and efficient. Furthermore, it was easy to recycle and reuse. Thence, phosphoric acid was a potential choice for conversion of cellulosic biomass to fermentable sugars in order to produce bio-fuels and high value-added chemicals.
phosphoric acid decrystallization enzymatic hydrolysis
Zhang Jingqiang Lin Lu Li Qingchun Liu Shijie Ouyang Pingkai
Department of Chemistry & Biology, University of Electronic Science and Technology of China Zhongsha State Key Laboratory of Pulp and Paper Engineering,South China University of Technology, Guangzhou,5 Department of Paper and Bioprocess Engineering,State University of New York-College of Environmental College of Medicine and Life Science, Nanjing University of Technology, Nanjing, 210009, China
国际会议
广州
英文
1413-1416
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）