Enhancing enzyme hydrolysis of Sorghum stalk by CO2‐pressurized liquid hot water pretreatment. Issue 1 (31st July 2016)

• Record Type: Journal Article
• Authors: Zhao, Meng‐Jiao; Xu, Qin‐Qin; Zhen, Meng‐Yuan; Li, Guo‐Min; Gang‐Xu, ; Yin, Jian‐Zhong
• Is Part Of: Environmental progress & sustainable energy. Volume 36:Issue 1(2017)
• Page Start: 208
• Page End: 213
• Publication Date: 2016-07-31
• Subjects: liquid hot water pretreatment -- carbonic acid pretreatment -- Sorghum stalk; Environmental engineering -- Periodicals; Sustainable engineering -- Periodicals; Environmental chemistry -- Periodicals; 333.7
• DOI: 10.1002/ep.12426
• Languages: English
• ISSNs: 1944-7442

Abstract

Abstract : 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