Experimental study on the microscopic characteristics affecting methane adsorption on anthracite coal treated with high-voltage electrical pulses

Chuan Jie Zhu, Ximiao Lu, Bai Quan Lin, Fa Zhi Yan, Chang Guo, Yi Du Hong, Xiang Liang Zhang

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The low gas permeability of coal formations with limited coal pores and fractures leads to difficulty in coalbed methane exploration. High-voltage electrical pulse has a potential application in enhanced coalbed methane recovery. In this study, we discuss the microscopic characteristics of anthracite coals treated by high-voltage electrical pulse. We find that C, O, and other coal elements constituting oxygenic groups, which mainly account for gas adsorption, decreased slightly after high-voltage electrical pulse treatment, indicating that elemental variation may have little influence on gas adsorption. The scanning electron microscopy and low-pressure nitrogen gas adsorption (LP-N2GA) results show that the cumulative micropore volumes of high-voltage electrical pulse-treated coals were much larger than those of original coals. The mercury intrusion porosimetry results show that the cumulative macropore volumes, which act as gas migration channels in coal increased. Additionally, high-voltage electrical pulse-treated coals were found to have smaller entrapment areas, indicating that gas migration was enhanced.
Original languageEnglish (US)
Pages (from-to)170-181
Number of pages12
JournalAdsorption Science and Technology
Volume36
Issue number1-2
DOIs
StatePublished - Feb 1 2018
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-09-20

Fingerprint

Dive into the research topics of 'Experimental study on the microscopic characteristics affecting methane adsorption on anthracite coal treated with high-voltage electrical pulses'. Together they form a unique fingerprint.

Cite this