Improving bio-oil stability by fractional condensation and solvent addition

被引：22

作者：

Yi, Wei ^{[1
]}

Wang, Xianhua ^{[1
]}

Zeng, Kuo ^{[1
]}

Yang, Haiping ^{[1
]}

Shao, Jingai ^{[1
]}

Zhang, Shihong ^{[1
]}

Chen, Hanping ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Peoples R China

来源：

FUEL | 2021年 / 290卷

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Bio-oil; Stability; Condensing temperature; Aging mechanism; Mixed additive; FAST PYROLYSIS; VAPORS; CHARCOAL; MANURE;

D O I：

10.1016/j.fuel.2020.119929

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

A three-stage condensation system was employed in this study to investigate the improvement effect of fractional condensation on the stability of bio-oil obtained through the pyrolysis of rice husk. The fractional bio-oil obtained from the second condenser was selected for aging experiments and compared with crude bio-oil collected via one-stage condensation at 0 degrees C. The bio-oil viscosity, moisture content, and organic composition were recorded and analyzed as characteristic parameters of the aging process. The results demonstrate that the aging reactions of the fractional bio-oil were suppressed or delayed because the bio-oil components involved in the aging reactions were effectively separated in the other two condensers. Subsequently, the fractional bio-oil was further upgraded via the addition of ethanol, ethyl acetate, or mixtures of these two solvents. It was observed that the addition of ethanol and ethyl acetate at a mass ratio of 1:1 significantly improved the stability of the fractional bio-oil, and the resulting modified bio-oil was found to be rich in high value-added components, such as 2-methyl-3-buten-2-ol, furfural, and phenol. Overall, this research facilitates a better understanding of the bio-oil aging mechanism and provides a new method to improve bio-oil stability.

引用

页数：10

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