Abstract
A special biomass waste, Chinese herb residues (CHR) was considered to be disposed of by the (co-) pyrolysis and the steam gasification with anthracitic coal (AC) through TGA and horizontal tubular furnace reactor (HTFR) coupled with gas chromatography (GC). TGA results showed that the interaction effects between CHR and AC during co-pyrolysis were negligible at the low CHR blending ratio, but there existed an inhibiting effect at the high CHR blending ratio. Co-pyrolysis kinetics results showed that the activation energies rose with the reaction proceeding. The HTFR pyrolysis showed that, with the temperature growing, the contents of CO and H2 increased, but the content of CO2 and CH4 decreased. In the steam gasification tests, the main product in the syngas was H2, and the gasification performances were influenced by the temperature and steam flow rate. FTIR results showed that the absorption peaks of functional groups in the residues from the HTFR pyrolysis reduced with the temperature increasing. For the steam gasification of the 50CHR/50AC blend, the contents of CO and H2 increased obviously as compared to those from the gasification of CHR. The syngas yield of 50CHR/50AC increased with the gasification temperatures increasing, and the value was clearly higher than that from CHR.
Graphical Abstract
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Acknowledgements
This work was financially supported by the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (21KJB470004) and the Open Project of Yunnan Provincial Key Laboratory of Metal-Organic Molecular Materials and Devices (YNMOMDKF2204).
Funding
Financial support for this work has been provided by the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (21KJB470004) and the Open Project of Yunnan Provincial Key Laboratory of Metal-Organic Molecular Materials and Devices (YNMOMDKF2204).
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Chuanzhong Zhou: investigation, writing, and draft preparation; Meng Sun: data analysis and revising; Hairui Qiao: investigation, and data analysis; Ziyang Gan: original draft preparation, and data analysis; Mingche **n: writing, software, and data analysis; Zheng Gong: investigation, and writing; Jianbiao Chen: conceptualization, writing, editing, funding acquisition, supervision; **aoyuan Wang: data analysis, revising, and editing; Haojie Gao: revising, and editing; Kai Guo: original draft preparation, and revision; Yuezhao Zhu: supervision.
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Highlights
• Pyrolysis and steam gasification characteristics of Chinese herb residues were studied.
• Co-pyrolysis kinetic parameters were calculated from an improved Coats-Redfern method.
• Gasification efficiency of CHR increased from 45.74 to 91.75% as temperature boosted.
• Gasification was affected by the steam flow rate, clearly improved by the introduction of steam.
• Compared to single CHR, the steam gasification performances of CHR and AC were better.
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Zhou, C., Qiao, H., Gan, Z. et al. (Co-) pyrolysis/steam gasification of Chinese herb residues and anthracitic coal: interaction effects, kinetic parameters, and products evaluation. Biomass Conv. Bioref. (2023). https://doi.org/10.1007/s13399-023-04584-0
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DOI: https://doi.org/10.1007/s13399-023-04584-0