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Chemcial Industry and Engineering 2025, Vol. 42 Issue (2) :116-124    DOI: 10.13353/j.issn.1004.9533.20230511
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Pyrolysis behavior and product characteristics of apple branches
YIN Ning1, SONG Yonghui1, WU Lei2, DONG Ping1, WANG Chaofan2, ZHANG Xinwei1
1. School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China

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Abstract Pyrolysis technology is one of the most important means for the efficient utilization of biomass resources, and research on the pyrolysis process and its products is of great significance. The pyrolysis behavior of apple tree branches (AB) and its product properties were investigated based on thermogravimetric-infrared spectroscopy (TG-FTIR), pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS), Fourier transform infrared spectroscopy (FTIR), and Raman spectroscopy (Raman) techniques. The results showed that the volatile compounds of AB pyrolysis were mainly released within the range of 178.6—459.9 ℃, and the weight loss rate was 53.12%. The gaseous products produced by AB pyrolysis corresponded to TG-DTG curves and were dominated by CO, CO2, and C=O-containing substances, while the absorption intensity of aliphatic and aromatic hydrocarbons was extremely weak. The volatile products consisted of substances with C≤10, accounting for 86.57%. The liquid products were mainly aldehydes and ketones, alkanes, acids, and aromatics, with 27.66%, 22.79%, 14.75%, and 12.50%, respectively. Among them, the aldehydes and ketones were mainly 4,4-dimethyl-2-oxetane and acetone. Alkanes were mainly cyclopropane and long-chain alkanes. The acid components were mainly acetic acid. The aromatic components were benzene, toluene and 2-methylindene. AB pyrolysis process is mainly the decomposition of oxygen-containing functional groups, in which the intensity of the vibrations decreases with the increase in pyrolysis temperature. Raman spectra showed that the proportion of aromatic side chains in ABC decreased, the concentration of aromatic rings with a benzene ring number greater than 6 increased, and the graphitization degree increased.
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YIN Ning
SONG Yonghui
WU Lei
DONG Ping
WANG Chaofan
ZHANG Xinwei
Keywordsapple tree branch   pyrolysis behavior   product characteristics   TG-FTIR   Py-GC/MS     
Received 2023-05-31;
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YIN Ning, SONG Yonghui, WU Lei, DONG Ping, WANG Chaofan, ZHANG Xinwei.Pyrolysis behavior and product characteristics of apple branches[J]  Chemcial Industry and Engineering, 2025,V42(2): 116-124
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