The Fractionation of Corn Stalk Components by Hydrothermal Treatment Followed by Ultrasonic Ethanol Extraction

Nianze Zhang, Chunyan Tian, Peng Fu, Qiaoxia Yuan, Yuchun Zhang, Zhiyu Li and Weiming Yi
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Nianze Zhang: School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
Chunyan Tian: School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
Peng Fu: School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
Qiaoxia Yuan: College of Engineering, Huazhong Agricultural University, Wuhan 430070, China
Yuchun Zhang: School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
Zhiyu Li: School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
Weiming Yi: Shandong Research Center of Engineering and Technology for Clean Energy, Zibo 255000, China

Energies, 2022, vol. 15, issue 7, 1-15

Abstract: The fractionation of components of lignocellulosic biomass is important to be able to take advantage of biomass resources. The hydrothermal–ethanol method has significant advantages for fraction separation. The first step of hydrothermal treatment can separate hemicellulose efficiently, but hydrothermal treatment affects the efficiency of ethanol treatment to delignify lignin. In this study, the efficiency of lignin removal was improved by an ultrasonic-assisted second-step ethanol treatment. The effects of ultrasonic time, ultrasonic temperature, and ultrasonic power on the ultrasonic ethanol treatment of hydrothermal straw were investigated. The separated lignin was characterized by solid product composition analysis, FT-IR, and XRD. The hydrolysate was characterized by GC-MS to investigate the advantage on the products obtained by ethanol treatment. The results showed that an appropriate sonication time (15 min) could improve the delignification efficiency. A proper sonication temperature (180 °C) can improve the lignin removal efficiency with a better retention of cellulose. However, a high sonication power 70% (840 W) favored the retention of cellulose and lignin removal.

Keywords: ultrasonic; components fractionation; lignocellulose; ethanol treatment (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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