The influence of combined pretreatment with surfactant/ultrasonic and hydrothermal carbonization on fuel properties, pyrolysis and combustion behavior of corn stalk

被引：43
作者：
Xu, Xiwei [1 ]
Tu, Ren [1 ]
Sun, Yan [1 ]
Wu, Yujian [1 ]
Jiang, Enchen [1 ]
Zhen, Jinrong [1 ]
机构：
[1] South China Agr Univ, Coll Mat & Energy, Guangzhou 510640, Guangdong, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2019年 / 271卷
基金：
中国国家自然科学基金;
关键词：
Hydrothermal carbonization; Surfactant/ultrasonic; Hydrochar; Fuel properties; Pyrolysis and combustion behavior; Pseudo-lignin; BIO-OIL; SOLID-FUEL; LIGNOCELLULOSIC BIOMASS; HYDROCHAR FUEL; WHEAT-STRAW; ACETIC-ACID; TORREFACTION; CONVERSION; CELLULOSE; TEMPERATURE;
D O I：
10.1016/j.biortech.2018.09.066
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The surfactant/ultrasonic combined with hydrothermal carbonization (HTC) were performed to investigate the effect on fuel properties, pyrolysis and combustion behavior of hydrochar under different condition. The results showed that the C/H and O/C ratio of corn stalk (CS)+ H2SO4 + tween was 1.1 and 0.29, which were close to coal, and the heat value reached 28.89 MJ/kg. HTC combined with ultrasonic/surfactant realized the complete separation of lignin with cellulose and hemicellulose in CS. Ultrasonic restricted the hydrolysis of lignin under alkaline condition and pseudo-lignin formation under acidic condition. Tween inhibited the formation and deposition of "pseudo-lignin". The thermogravimetric (TG) experiments displayed the tween combined with HTC improved the pyrolysis temperature and decreased activation energy as well as the combustion ignition temperature which showed better pyrolysis and combustion characteristics. The nth-order kinetic mode was fit with the TG datas. The mechanism of tween combined with HTC was also analyzed.
引用
收藏
页码：427 / 438
页数：12
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