文献类型：期刊文献

英文题名：Pyrolysis characteristics and kinetic analysis of coating pitch derived from ethylene tar using model-free and model-fitting methods

作者：Gao, Wei[1];Zhang, Yongzheng[1];Wang, Yanli[1];Zhan, Liang[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Green Chem Engn & Ind Catalysis, State Key Lab Chem Engn, Key Lab Specially Funct Polymer Mat & Related Tech, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2024

卷号：183

外文期刊名：JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS

收录：;EI(收录号：20244217186446);WOS:【SCI-EXPANDED(收录号:WOS:001335115300001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (No.22075081, 52372045 and U1710252) , the Fundamental Research Funds for the Central Universities (JKD01231701) , China Postdoctoral Science Foundation (No. 2023M731084) .

语种：英文

外文关键词：Coating pitch; Pyrolysis kinetics; Model-free; Model-fitting

摘要：This work conducted the pyrolysis of coating pitch derived from the ethylene tar through thermogravimetry analysis. The thermogravimetry-mass spectrometry and solid-state 13C nuclear magnetic resonance spectroscopy were performed to correlate the structural characteristics with the pyrolysis behavior. Meanwhile, the pyrolysis kinetics were estimated with model-free and model-fitting methods. The TG-DTG results showed that the pyrolysis process was generally divided into drying, fast pyrolysis, and polycondensation stages, accompanied by the decomposition of active functional groups like the aliphatic carbons bonded to oxygen (fOal), the pyrolysis of relatively stable groups like the non-protonated aromatic carbon (fHa ), and the condensation of high bondingenergy aromatic structure like aromatic bridgehead carbon (fBa). The activation energy obtained from modelfree analysis ranged from 78.12 to 150.92 kJ/mol with the increasing conversion, indicating the pyrolysis process as a multi-step reaction mechanism. Furthermore, the reaction model A1/3 (g(alpha) = [-ln(1 - alpha)]3) was identified as the most suitable model for the pyrolysis of coating pitch in the conversion range of 0.25-0.8. The modeling values matched well with the experimental data, indicating the accuracy and feasibility of the results.