Effect of gas-pressurized torrefaction on the upgrading and pyrolysis characteristics of corn stalk

GAO Pan; ZHAO Ze-heng; LIU Yu-tong; GUO De-zhong; YANG Shao-xia

doi:10.1016/S1872-5813(21)60190-1

Volume 50 Issue 6

Jun. 2022

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Article Navigation > Journal of Fuel Chemistry and Technology > 2022 > 50(6): 735-746

GAO Pan, ZHAO Ze-heng, LIU Yu-tong, GUO De-zhong, YANG Shao-xia. Effect of gas-pressurized torrefaction on the upgrading and pyrolysis characteristics of corn stalk[J]. Journal of Fuel Chemistry and Technology, 2022, 50(6): 735-746. doi: 10.1016/S1872-5813(21)60190-1

Citation:

GAO Pan, ZHAO Ze-heng, LIU Yu-tong, GUO De-zhong, YANG Shao-xia. Effect of gas-pressurized torrefaction on the upgrading and pyrolysis characteristics of corn stalk[J]. Journal of Fuel Chemistry and Technology, 2022, 50(6): 735-746. doi: 10.1016/S1872-5813(21)60190-1

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Effect of gas-pressurized torrefaction on the upgrading and pyrolysis characteristics of corn stalk

doi: 10.1016/S1872-5813(21)60190-1

1.
School of New Energy, North China Electric Power University, Beijing 102206, China
2.
State Grid Gansu Liujiaxia Hydropower Plant, Linxia 731100, China
3.
School of water conservancy and Hydropower Engineering, North China Electric Power University, Beijing 102206, China

Funds: The project was supported by the National Natural Science Foundation of China (51776070, 51206045) and the Fundamental Research Funds for Central Universities (2018MS033)

Received Date: 2021-10-19
Accepted Date: 2021-12-29
Rev Recd Date: 2021-12-06

Available Online: 2022-01-11

Publish Date: 2022-06-25

Abstract

Abstract

Corn straw was torrefied under at different temperatures and the torrefied products were characterized by proximate analysis, ultimate analysis, FT-IR, TGA and pyrolysis experiments; the effect of gas-pressurized torrefaction on the upgrading and pyrolysis characteristics of corn stalk was investigated. The results indicate that the deoxidation efficiency and energy density of torrefied products under both atmospheric pressure (AP) and gas pressured (GP) conditions increase with the increase of torrefaction temperature. The temperature required for GP torrefaction is almost 40 °C lower than that for AP torrefaction to obtain the same mass yield. The energy yield, carbon yield, deoxidation efficiency and the energy density of GP-torrefied corn straw are 1.125, 1.142, 1.539 and 1.131 times higher than those of AP-torrefied one, respectively. The GP-torrefied corn straw shows better hydrophobicity and is easier to dehydrate. In addition, the pyrolysis of GP-torrefied corn straw produces significantly higher fractions of CH₄ and H₂ in the gaseous product than the pyrolysis of AP-torrefied one; meanwhile, the relative content of phenols in the liquid products for the pyrolysis of GP-torrefied samples also increases up to 51.11%, whereas the contents of furans and acids decrease considerably. All these suggest that GP torrefaction performs better in biofuel upgrading than AP torrefaction under the same temperature.
- corn stalk,
- gas-pressurized torrefaction,
- upgrading,
- pyrolysis characteristics

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References(35)

References

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