采用超临界 CO2 预处理甘蔗渣，然后用碱性过氧化氢。
Innovative pretreatment of sugarcane bagasse using supercritical CO2 followed by alkaline hydrogen peroxide.
机构信息
Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, ROC.
Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, ROC.
出版信息
Bioresour Technol. 2014 Sep;167:192-7. doi: 10.1016/j.biortech.2014.06.006. Epub 2014 Jun 12.
An innovative method for pretreatment of sugarcane bagasse using sequential combination of supercritical CO2 (scCO2) and alkaline hydrogen peroxide (H2O2) at mild conditions is proposed. This method was found to be superior to the individual pretreatment with scCO2, ultrasound, or H2O2 and the sequential combination of scCO2 and ultrasound regarding the yield of cellulose and hemicellulose, almost twice the yield was observed. Pretreatment with scCO2 could obtain higher amount of cellulose and hemicellulose but also acid-insoluble lignin. Pretreatment with ultrasound or H2O2 could partly depolymerize lignin, however, could not separate cellulose from lignin. The analysis of liquid products via enzymatic hydrolysis by HPLC and the characterization of the solid residues by SEM revealed strong synergetic effects in the sequential combination of scCO2 and H2O2.
提出了一种在温和条件下，使用超临界 CO2（scCO2）和碱性过氧化氢（H2O2）顺序组合预处理甘蔗渣的创新方法。与单独使用 scCO2、超声或 H2O2 预处理以及 scCO2 和超声顺序组合预处理相比，该方法在纤维素和半纤维素的收率方面表现优异，几乎提高了一倍。scCO2 预处理可以获得更多的纤维素和半纤维素，但也会得到更多的酸不溶性木质素。超声或 H2O2 预处理可以部分解聚木质素，但不能将纤维素与木质素分离。通过 HPLC 对酶解液体产物的分析和 SEM 对固体残渣的表征揭示了 scCO2 和 H2O2 顺序组合中的强协同效应。
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