Study on the regulation mechanism of torrefaction pretreatment on fuel quality and pyrolysis characteristics of rice husk

WANG Zhuo-zhi; ZHANG Lei; XIONG Li-fu; XU Lian-fei; YANG Jian-cheng; SHEN Bo-xiong

doi:10.19906/j.cnki.JFCT.2022058

Volume 51 Issue 3

Mar. 2023

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Article Navigation > Journal of Fuel Chemistry and Technology > 2023 > 51(3): 320-329

WANG Zhuo-zhi, ZHANG Lei, XIONG Li-fu, XU Lian-fei, YANG Jian-cheng, SHEN Bo-xiong. Study on the regulation mechanism of torrefaction pretreatment on fuel quality and pyrolysis characteristics of rice husk[J]. Journal of Fuel Chemistry and Technology, 2023, 51(3): 320-329. doi: 10.19906/j.cnki.JFCT.2022058

Citation:

WANG Zhuo-zhi, ZHANG Lei, XIONG Li-fu, XU Lian-fei, YANG Jian-cheng, SHEN Bo-xiong. Study on the regulation mechanism of torrefaction pretreatment on fuel quality and pyrolysis characteristics of rice husk[J]. Journal of Fuel Chemistry and Technology, 2023, 51(3): 320-329. doi: 10.19906/j.cnki.JFCT.2022058

Citation:

WANG Zhuo-zhi, ZHANG Lei, XIONG Li-fu, XU Lian-fei, YANG Jian-cheng, SHEN Bo-xiong. Study on the regulation mechanism of torrefaction pretreatment on fuel quality and pyrolysis characteristics of rice husk[J]. Journal of Fuel Chemistry and Technology, 2023, 51(3): 320-329. doi: 10.19906/j.cnki.JFCT.2022058

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Study on the regulation mechanism of torrefaction pretreatment on fuel quality and pyrolysis characteristics of rice husk

doi: 10.19906/j.cnki.JFCT.2022058

1.
School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China
2.
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

Funds: The project was supported by the National Natural Science Foundation of China (52006052)

Received Date: 2022-05-21
Rev Recd Date: 2022-06-21

Available Online: 2022-07-11

Publish Date: 2023-03-15

Abstract

Abstract

Elemental distribution, compositional variation, microstructural feature, surface pore structure, pyrolysis characteristic and reactivity of samples derived from inert/oxidative torrefaction performed in 493–573 K were investigated. The results illustrated that reaction temperature was the dominant factor affecting fuel quality of torrefied sample, and the addition of oxidizing agents would strengthen the variations in fuel properties after undergoing torrefaction. Increasing reaction temperature would promote the decomposition of oxygen containing functional groups from the particles, when torrefaction performed in raw flue gas atmosphere at 573 K, the H/C and O/C reached the minimum values (0.188 and 0.259). Additional oxidizing agents would synergistically modify the surface functionality distribution, microstructure and surface physical structure of rice husk particles, and the increase of temperature was beneficial to this phenomenon. The critical values were obtained from the sample torrefied in raw flue gas atmosphere at 573 K, the minimum I_{(G_r + V_L + V_r)}/I_D value was 1.79 and the maximum specific surface area was 295.78 m²/g. By means of the utilization of Coats-Redfern approximation function, the pyrolysis kinetics (14.84 → 28.82 kJ/mol) and characteristic parameters would be determined via the TGA data for each sample. Flue gas seemed to be more energy-saving and efficient for improving fuel quality and storage stability of biomass.
- biomass,
- torrefaction,
- fuel quality,
- pyrolysis,
- reactivity

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References(37)

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