STUDY ON CHEMICAL STRUCTURE EVOLUTION AND REACTIVE MECHANISM OF BIOMASS CHAR PREPARED IN CO<sub>2</sub>/H<sub>2</sub>O ATMOSPHERE

LIU Liang; LI Wenhao; LIU Zenghui; QING Mengxia; ZHAO Guangmin; LIU Wenbin

doi:10.13205/j.hjgc.202304015

Volume 41 Issue 4

Apr. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(4): 108-115

LIU Liang, LI Wenhao, LIU Zenghui, QING Mengxia, ZHAO Guangmin, LIU Wenbin. STUDY ON CHEMICAL STRUCTURE EVOLUTION AND REACTIVE MECHANISM OF BIOMASS CHAR PREPARED IN CO2/H2O ATMOSPHERE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(4): 108-115. doi: 10.13205/j.hjgc.202304015

Citation:

LIU Liang, LI Wenhao, LIU Zenghui, QING Mengxia, ZHAO Guangmin, LIU Wenbin. STUDY ON CHEMICAL STRUCTURE EVOLUTION AND REACTIVE MECHANISM OF BIOMASS CHAR PREPARED IN CO₂/H₂O ATMOSPHERE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(4): 108-115. doi: 10.13205/j.hjgc.202304015

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STUDY ON CHEMICAL STRUCTURE EVOLUTION AND REACTIVE MECHANISM OF BIOMASS CHAR PREPARED IN CO₂/H₂O ATMOSPHERE

doi: 10.13205/j.hjgc.202304015

1. School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha 410114, China;
2. Key Laboratory of Renewable Energy Electric-Technology of Hunan Province, Changsha 410114, China

Received Date: 2022-08-30
Available Online: 2023-05-26
Publish Date: 2023-04-01

Abstract

Abstract

With rice straw(RS) as the research object, the effects of CO₂/H₂O atmosphere on biomass yield, structure and reactivity of RS in the process of volatilization were investigated. Fourier transform infrared spectroscopy (FTIR)and Raman spectroscopy (Raman) were used to characterize the RS char, and the evolution law of the microchemical structure of RS char under different reaction atmospheres was investigated. The combustion reactivity of RS char was analyzed by a thermogravimetric analyzer (TGA), and the effects of CO₂ atmosphere, H₂O atmosphere and CO₂/H₂O mixture atmosphere on the microstructure evolution and reaction mechanism of RS char were revealed. The results showed that the yield of biomass char decreased with the increase of final reaction temperature in CO₂/H₂O atmosphere, and the difference of yield of biomass char was obvious when the reaction temperature was above 700 ℃. CO₂/H₂O mixture atmosphere was more conducive to the consumption and condensation of the small aromatic ring system of biomass char. CO₂ atmosphere and H₂O atmosphere had a synergistic effect and competitive relation in the reaction of biomass char at high temperature. CO₂/H₂O atmosphere could improve the combustion characteristics of biomass char when the char-making temperature was 700 ℃ above.
- rice straw,
- oxy-fuel combustion,
- biomass char,
- chemical structure,
- reactivity

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References(34)

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