Biochar Properties of Waste Vegetable Leaves by Isothermal Pyrolysis

doi:10.12068/j.issn.1005-3026.2023.03.016

Journal of Northeastern University(Natural Science) ›› 2023, Vol. 44 ›› Issue (3): 424-431.DOI: 10.12068/j.issn.1005-3026.2023.03.016

• Resources & Civil Engineering • Previous Articles Next Articles

Biochar Properties of Waste Vegetable Leaves by Isothermal Pyrolysis

ZHANG Yi-teng^1,2， CHENG Xing-xing^1,2， WANG Xue-tao³， WANG Zhi-qiang^1,2

1.School of Energy and Power Engineering， Shandong University， Jinan 250061， China; 2.National Engineering Laboratory for Reducing Emissions from Coal Combustion， Jinan 250061， China; 3.School of College of Vehicle and Traffic Engineering， Henan University of Science and Technology， Luoyang 471003， China.

Revised:2021-12-13 Accepted:2021-12-13 Published:2023-03-24
Contact: CHENG Xing-xing
About author:-
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Abstract

Abstract: The waste cabbage leave(WCL)was used as raw material to prepare biochars under various temperatures(420， 520， 620， 720℃). Biochars were comprehensively characterized by Fourier transform infrared spectroscopy(FTIR)， X-ray diffraction(XRD)and so on. Additionally， the relationship between pyrolysis gas and biochar properties was investigated. The results show that biomass energy recovery could concentrate on the process conditions， as pyrolysis gas is significantly correlated with the heating rate， while biochar production is influenced by the heat and retention time at the end of pyrolysis. Pyrolytic gases could be correlated with the changes of functional groups on biochar surface and the microstructure of carbon. High-temperature biochars have more ordered structures， but low-temperature biochars have more functional groups and their oxygen-containing functional groups can reach 55%. In addition， 520℃ may be the characteristic temperature point of bio-pyrolysis of WCL.

Key words: biochar; waste cabbage leave; TG-FTIR; isothermal pyrolysis; surface functional group

CLC Number:

TK019

ZHANG Yi-teng， CHENG Xing-xing， WANG Xue-tao， WANG Zhi-qiang. Biochar Properties of Waste Vegetable Leaves by Isothermal Pyrolysis[J]. Journal of Northeastern University(Natural Science), 2023, 44(3): 424-431.

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Biochar Properties of Waste Vegetable Leaves by Isothermal Pyrolysis

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