Study on gasification kinetics and product characteristics of typical lignin

LIU Su-min; YANG Hai-ping; HU Jun-hao; ZOU Jun; CHEN Han-ping; WANG Chen-guang

doi:10.19906/j.cnki.JFCT.2021087

Volume 50 Issue 4

Apr. 2022

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Article Navigation > Journal of Fuel Chemistry and Technology > 2022 > 50(4): 428-435

LIU Su-min, YANG Hai-ping, HU Jun-hao, ZOU Jun, CHEN Han-ping, WANG Chen-guang. Study on gasification kinetics and product characteristics of typical lignin[J]. Journal of Fuel Chemistry and Technology, 2022, 50(4): 428-435. doi: 10.19906/j.cnki.JFCT.2021087

Citation:

LIU Su-min, YANG Hai-ping, HU Jun-hao, ZOU Jun, CHEN Han-ping, WANG Chen-guang. Study on gasification kinetics and product characteristics of typical lignin[J]. Journal of Fuel Chemistry and Technology, 2022, 50(4): 428-435. doi: 10.19906/j.cnki.JFCT.2021087

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Study on gasification kinetics and product characteristics of typical lignin

doi: 10.19906/j.cnki.JFCT.2021087

1.
State Key Laboratory on Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China
2.
Biomass Heat Conversion Research Center, Guangzhou Energy Research Institute, Guangzhou 510640, China

Funds: The project was supported by the National Key Research and Development Program of China（2018YFB1501403）

Received Date: 2021-08-31
Rev Recd Date: 2021-10-09

Available Online: 2021-10-28

Publish Date: 2022-04-26

Abstract

Abstract

Four typical lignins: alkali lignin, lignosulfonate, hydrolyzed lignin and G-type lignin, were selected to study their gasification weight loss characteristics, kinetic mechanism and product characteristics on a thermogravimetric analyzer (TGA) and fixed bed experiments, in order to reveal the influence of lignin sources on their gasification characteristics. The results showed that the homogeneous model fit the gasification reaction process well. Alkali lignin had the highest pyrolytic activity, reacted at lower temperature, and had the lowest activation energy. However, the structure of pyrolytic coke was dense and the gasification reactivity was poor. G-lignin had similar gasification characteristics with alkali lignin. Lignosulfonate and hydrolyzed lignin had two pyrolysis stages, and their coke gasification reactivities were high. For products characteristics, H₂ and CO were the main gas products. Alkali lignin had the H₂ yield as high as 55 mmol/g, the highest carbon conversion rate (87%), and the minimum residual coke. However, hydrolyzed lignin and G-lignin had lower gas production, but tar and solid residue were relatively more, which was mainly related to the inorganic mineral content and composition.
- lignin,
- thermogravimetric analysis,
- gasification kinetics,
- product characteristics

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References(20)

References

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