期刊
BIORESOURCE TECHNOLOGY
卷 136, 期 -, 页码 469-474出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.02.118
关键词
Cholinium amino acids ionic liquids; Basicity; Delignification; Enzymatic saccharification; Lignocellulosic biomass
资金
- Research Funds for Zhujiang Nova Program [2012J2200011]
- National Natural Science Foundation of China [20906032, 21072065]
- Fundamental Research Funds for the Central Universities, SCUT [2012ZP0009]
Pretreatment of rice straw by using renewable cholinium lysine ionic liquid ([Ch][Lys] IL)-water mixtures and subsequent enzymatic hydrolysis of the residues were conducted in this work. There is a clear correlation between the delignification capacity of the pretreatment solvent and its basicity. After pretreatment, surface area and pore volume of rice straw increased significantly, which substantially improved polysaccharides accessibility to enzymes and thus enhanced polysaccharides digestion. By carefully controlling the pretreatment severity (IL content, temperature and duration), loss of readily extractable xylan could be minimized. The sugar yields of 81% for glucose and 48% for xylose were achieved in the enzymatic hydrolysis of rice straw after pretreatment with 20% [Ch][Lys]-water mixture at 90 degrees C for 1 h. This pretreatment process is highly promising for industrial application because of high sugar yields, low energy input, short pretreatment time, and being environmentally benign and highly tolerant to moisture. (C) 2013 Elsevier Ltd. All rights reserved.
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