Shan Xian-Kang, Zhao Shuai-Li, Ma Ya-Ya, Mo Wenlong, Wei Xian-Yong
State Key Laboratory of Chemistry and Utilization of Carbon-Based Energy Resources and Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), College of Chemical Engineering, Xinjiang University, Ürümqi, Xinjiang 830046, China.
Jiangsu Province Engineering Research Center of Fine Utilization of Carbon Resources, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China.
ACS Omega. 2022 Mar 1;7(10):8547-8557. doi: 10.1021/acsomega.1c06350. eCollection 2022 Mar 15.
Taking five coal samples (FCSs) in Xinjiang as the research object, characterizations such as proximate analysis, ultimate analysis, Fourier transform infrared (FTIR), and thermogravimetry-differential thermal analysis (TG-DTG) were carried out. The Coats-Redfern model was used to simulate pyrolysis kinetics of FCSs under different reaction orders (ROs). The results showed that except for HSBC, the of the other four coal samples are all higher than 0.9, which showed a good correlation effect. FCSs present similar reaction activation energy in the same RO and temperature range. Results of FTIR showed that the hydroxyl groups of FCSs, in the range of 3100-3600 cm, were mainly self-associated hydroxyl hydrogen bonds and hydroxyl π bonds, and they occupied over 63%. Among them, the pyrolysis characteristic index () of XBC was 4.139 × 10, higher than those of other samples, and it showed good pyrolysis performance. Moreover, by reducing the temperature range appropriately, the fitting results showed a better correlation effect.
以新疆的五个煤样（FCSs）为研究对象，进行了元素分析、终极分析、傅里叶变换红外光谱（FTIR）和热重-差热分析（TG-DTG）等表征。采用Coats-Redfern模型模拟了不同反应级数（ROs）下FCSs的热解动力学。结果表明，除HSBC外，其他四个煤样的 均高于0.9，显示出良好的相关效果。FCSs在相同的反应级数和温度范围内呈现出相似的反应活化能。FTIR结果表明，FCSs在3100-3600 cm范围内的羟基主要是自缔合羟基氢键和羟基π键，且它们占比超过63%。其中，XBC的热解特征指数（）为4.139×10，高于其他样品，表现出良好的热解性能。此外，适当降低温度范围，拟合结果显示出更好的相关效果。
