Citation: YIN Si-yuan, TIAN Chun-yan, LI Yan-mei, GAO Chuan-rui, ZHANG Nian-ze, CHOU Peng-tao, YI Wei-ming, LI Zhi-he. Effect of aqueous phase recirculation on characteristics of bio-crude oil formation during hydrothermal liquefaction of corn stalk[J]. Journal of Fuel Chemistry and Technology, ;2020, 48(3): 275-285. shu

Effect of aqueous phase recirculation on characteristics of bio-crude oil formation during hydrothermal liquefaction of corn stalk

YIN Si-yuan ^1,2 ,
TIAN Chun-yan ^1,2 ,
LI Yan-mei ^1,2 ,
GAO Chuan-rui ^1,2 ,
ZHANG Nian-ze ^1,2 ,
CHOU Peng-tao ^1,2 ,
YI Wei-ming ^1,2,, ,
LI Zhi-he ^1,2

1.
College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
2.
Shandong Research Center of Engineering & Technology for Clean Energy, Zibo 255000, China

Corresponding author: YI Wei-ming, yiweiming@sdut.edu.cn
Received Date: 6 January 2020
Revised Date: 11 February 2020

Fund Project: The project was supported by National Natural Science Foundation of Shandong Province (ZR2017BEE049), National Natural Science Foundation of China (51706126, 31872400, 51536009) and SDUT & Zibo City Integration Project (2019ZBXC380)The project was supported by National Natural Science Foundation of Shandong Province ZR2017BEE049SDUT & Zibo City Integration Project 2019ZBXC380National Natural Science Foundation of China 31872400National Natural Science Foundation of China 51706126National Natural Science Foundation of China 51536009

Figures(6)

The corn stalk was used as the raw material and the deionized water was used as the medium to study the effect of aqueous phase recirculation on characteristics of bio-crude oil formation during hydrothermal liquefaction of corn stalk. No additional deionized water was added during the recirculation. The results show that the aqueous phase recirculation can enrich the concentration of organic acids in aqueous phase and promote the conversion of ketophenols, which can improve the yield and quality of bio-crude oil and solid products. Specifically, the aqueous phase recirculation has little effect on the pH value of the aqueous phase (3.62-3.91), but the organic acids such as acetic acid and propionic acid are continuously accumulated and the content of ketones and phenols is gradually reduced. Also, the yield of bio-crude oil is gradually increased from 20.42% to 24.31%, the quality of bio-crude oil is slightly improved, and the carbon content of the solid product is increased from 60.94% to 61.74%.
- hydrothermal liquefaction,
- corn stalk,
- aqueous phase recirculation,
- characteristics of biocrude formation,
- bio-crude oil
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