Kinetic analysis of element evolution during low-temperature oxidation of coal

被引：0

作者：

He K. ^{[1
,3
]}

Zhang Y.-L. ^{[2
]}

Shi J.-W. ^{[1
]}

Wang F.-Y. ^{[1
]}

机构：

[1] School of Mechanical Electronic and Information Engineering, China University of Mining and Technology(Beijing), Beijing

[2] State Key Laboratory Breeding Base of Coal Science and Technology Co-founded by Shanxi Province and the Ministry of Science and Technology, Taiyuan University of Technology, Taiyuan

[3] Technical and Testing Section, Mining Products Safety Approval and Certification Center, Beijing

来源：

Meitan Xuebao/Journal of the China Coal Society | 2016年 / 41卷 / 06期

关键词：

Coal; Element evolution; Kinetics; Low-temperature oxidation;

D O I：

10.13225/j.cnki.jccs.2015.1745

中图分类号：

学科分类号：

摘要：

The complex macromolecular matrix of coal was divided into the elements of C, O, H, S and N, which were involved in the oxidation reaction. Based on the changes of element contents during coal oxidation process at low temperature, the three kinetic models, including pseudo-first-order kinetics model, Coats and Redfern's model, and Freeman and Carroll's model, were introduced to investigate the kinetic characteristics of coal oxidation at low temperature. Kinetic study reveals that the evolutions of these elements during coal oxidation at low temperature follow pseudo-first order kinetics and Coats and Redfern's model. The activation energies for these elements evolution in the oxidation process by using the pseudo-first order kinetics have been found to be almost similar to those calculated by applying the Coats and Redfern's equation. The reaction rates computed by the pseudo-first order kinetics are very low and have been found to be 10-5-10-6, suggesting a very low rate of successful collisions for the formation of activated complex. A kinetic compensation effect between the activation energy and exponential facto was also observed for the evolutions of these elements. © 2016, Editorial Office of Journal of China Coal Society. All right reserved.

引用

页码：1460 / 1466

页数：6

共 11 条

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