High pressure assist-alkali pretreatment of cotton stalk and physiochemical characterization of biomass
文献类型: 外文期刊
第一作者: Du, Shuang-kui
作者: Du, Shuang-kui;Zhu, Xinna;Wang, Hua;Zhou, Dayun;Yang, Weihua;Xu, Hongxia
作者机构:
关键词: Box-Behnken design;Cotton stalk;Enzymatic hydrolysis;High pressure assist-alkali pretreatment (HPAP)
期刊名称:BIORESOURCE TECHNOLOGY ( 影响因子:9.642; 五年影响因子:9.237 )
ISSN:
年卷期:
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收录情况: SCI
摘要: Ground cotton stalks were pretreated with sodium hydroxide (NaOH) at concentrations of 1-4% (w/v), pressures of 30-130. kPa, durations of 15-75. min, and liquid/solid ratios of 10:1-30:1. Modeling of the high pressure assist-alkali pretreatment (HPAP) of cotton stalk was attempted. The levels of NaOH concentration, pressure, and duration were optimized using a Box-Behnken design to enhance the cellulose content of treated solid residue. The optimum pretreatment conditions were as follows: liquid/solid ratio, 20:1; pressure, 130. kPa; NaOH concentration, 3.0%; duration, 40. min. During the conditions, cellulose content of pretreated cotton stalk residue was 64.07%. The maximum cellulose conversion of 45.82% and reducing sugar yield of 0.293. g/g upon hydrolysis were obtained. Significant differences were observed in biomass composition and physiochemical characteristics between native and alkali-treated biomass. High NaOH concentration and pressure were conducive to lignin dissolution and resulted in increased cellulose content and conversion.
分类号: Q
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