Enhancing enzyme hydrolysis of Sorghum stalk by CO2‐pressurized liquid hot water pretreatment
Enhancing enzyme hydrolysis of Sorghum stalk by CO2‐pressurized liquid hot water pretreatment
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DOI：
10.1002/ep.12426
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发表时间：
2017
影响因子：
2.8
通讯作者：
Meng-Jiao Zhao;Qin‐Qin Xu;Meng-Yuan Zhen;Guo-min Li;Gang-Xu;Jianzhong Yin
中科院分区：
文献类型：
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作者：
Meng-Jiao Zhao;Qin‐Qin Xu;Meng-Yuan Zhen;Guo-min Li;Gang-Xu;Jianzhong Yin
采用CO2加压液态热水对高粱秸秆进行预处理，以提高其酶解的可及性。预处理温度为180 ~ 220°C，反应时间为10 ~ 30 min。在200°C和20 min条件下预处理的样品总还原糖产率最高，为81.54%。与N2加压液态热水工艺不同，CO2加压法中生成的碳酸在预处理过程中起到催化剂的作用。结果表明，在较低的温度和较短的反应时间，添加CO2的还原糖产率显着增加。最后，利用X射线衍射和扫描电子显微镜分析了预处理前后高粱秆的微观结构。© 2016美国化学工程师学会环境规划，36：208-213，2017
CO2‐pressurized liquid hot water was applied to pretreat Sorghum stalk to increase its accessibility for enzyme hydrolysis. Pretreatment temperatures tested ranged from 180 to 220°C, and reaction times varied between 10 and 30 min. The highest total reducing sugar yield of 81.54% was obtained for the sample pretreated at 200°C and 20 min. Different from the N2‐pressurized liquid hot water process, the generated carbonic acid in the CO2‐pressurized method acted as catalyst in the pretreatment process. It was found that the reducing sugar yield increased significantly at lower temperature and shorter reaction time with the addition of CO2. Finally, X‐ray diffraction and scanning electron microscope analysis were used to investigate the microstructure of the Sorghum stalk before and after the pretreatment. © 2016 American Institute of Chemical Engineers Environ Prog, 36: 208–213, 2017