Study of Methane Adsorption on Coal in an Electric Field
- Authors: Li C.1, Hu P.1, Lei D.2, Sun Y.1
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Affiliations:
- School of Resource and Safety Engineering, China University of Mining and Technology
- School of Safety science and Engineering, Henan University of science and technology
- Issue: Vol 53, No 3 (2017)
- Pages: 444-453
- Section: Article
- URL: https://journals.rcsi.science/0009-3092/article/view/235022
- DOI: https://doi.org/10.1007/s10553-017-0822-6
- ID: 235022
Cite item
Abstract
We have studied the influence of an electrostatic field on the process of methane adsorption on the surface of coal under various conditions. We have determined the values of the Langmuir adsorption constants for the coal samples and have analyzed the adsorption mechanism. We found that gas adsorption is intensified in an electric field. We established that one of the Langmuir constants for tectonically deformed coal is larger than for raw coal, while the other constant, which usually remains unchanged, tends to increase when exposed to the field. We estimated the surface free energy of the system and we established that it increases with an increase in the electric field intensity. According to the thermodynamics of spontaneous processes, usually the Gibbs free energy of a system tends to decrease as a result of intensification of adsorption, and therefore application of an electric field leads to its increase.
About the authors
Chengwu Li
School of Resource and Safety Engineering, China University of Mining and Technology
Author for correspondence.
Email: fslcw2000@163.com
China, Beijing
Po Hu
School of Resource and Safety Engineering, China University of Mining and Technology
Email: fslcw2000@163.com
China, Beijing
Dongji Lei
School of Safety science and Engineering, Henan University of science and technology
Email: fslcw2000@163.com
China, Jiaozuo
Yingfeng Sun
School of Resource and Safety Engineering, China University of Mining and Technology
Email: fslcw2000@163.com
China, Beijing
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