TG-FTIR study on escape behavior of products from co-pyrolysis of coal and residuum

被引：0

作者：

Zhou X. ^{[1
]}

Wu H. ^{[2
]}

Liu J. ^{[1
]}

Huang X. ^{[2
]}

Liu T. ^{[1
]}

Zhong M. ^{[2
]}

Ma F. ^{[2
]}

机构：

[1] College of Chemistry, Xinjiang University, State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, Xinjiang University, Urumqi

[2] Xinjiang Key Laboratory of Coal Clean Conversion & Chemical Engineering Process, School of Chemical Engineering and Technology, Xinjiang University, Urumqi

来源：

Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | 2024年 / 52卷 / 04期

基金：

中国国家自然科学基金;

关键词：

co-pyrolysis; Naomaohu coal; O-containing functional groups; promotion effect; Tahe residuum;

D O I：

10.1016/S1872-5813(23)60393-7

中图分类号：

学科分类号：

摘要：

Coal and residuum are first co-pyrolyzed, and then hydrogenated into small molecule products during co-liquefaction. Therefore, clarifying influence of residuum on coal pyrolysis performance is an important thermochemical basis for regulating the process. The co-pyrolysis behavior of atmospheric residuum (AR) and Naomaohu coal (NMH) were investigated by TG, TG-FTIR and distributed activation energy model. The results showed that the peak temperature of the maximum rate of weight loss for the co-pyrolysis process was reduced by 7 °C compared with the theoretical value calculated by weighted average of AR and NMH pyrolysis alone, while the weight loss increased by 3%, the average activation energy decreased by 23.6 kJ/mol. In addition, the peak area of alkyl O-containing functional groups such as alcohols and ethers increased, whereas those of CO and CO2 decreased, suggesting that AR had a positive effect on NMH pyrolysis. Meanwhile, alkyl radicals from AR decomposition would combine with O-containing radicals generated from coal pyrolysis, thus resulting in a decrease of CO and CO2 by inhibiting breakage of carboxyl groups. This work will provide a scientific evaluation basis for revealing the influence of residuum on composition of coal liquefaction product during co-liquefaction. © 2024 Science Press. All rights reserved.

引用

页码：525 / 535

页数：10

共 38 条

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