Changes in Pore Structure of Coal Caused by CS2 Treatment and Its Methane Adsorption Response
Joint Authors
Chen, Run
Qin, Yong
Zhang, Pengfei
Wang, Youyang
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-08-06
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
The pore structure and gas adsorption are two key issues that affect the coal bed methane recovery process significantly.
To change pore structure and gas adsorption, 5 coals with different ranks were treated by CS2 for 3 h using a Soxhlet extractor under ultrasonic oscillation conditions; the evolutions of pore structure and methane adsorption were examined using a high-pressure mercury intrusion porosimeter (MIP) with an AutoPore IV 9310 series mercury instrument.
The results show that the cumulative pore volume and specific surface area (SSA) were increased after CS2 treatment, and the incremental micropore volume and SSA were increased and decreased before and after Ro,max=1.3%, respectively; the incremental big pore (greater than 10 nm in diameter) volumes were increased and SSA was decreased for all coals, and pore connectivity was improved.
Methane adsorption capacity on coal before and after Ro,max=1.3% also was increased and decreased, respectively.
There is a positive correlation between the changes in the micropore SSA and the Langmuir volume.
It confirms that the changes in pore structure and methane adsorption capacity due to CS2 treatment are controlled by the rank, and the change in methane adsorption is impacted by the change of micropore SSA and suggests that the changes in pore structure are better for gas migration; the alteration in methane adsorption capacity is worse and better for methane recovery before and after Ro,max=1.3%.
A conceptual mechanism of pore structure is proposed to explain methane adsorption capacity on CS2 treated coal around the Ro,max=1.3%.
American Psychological Association (APA)
Chen, Run& Qin, Yong& Zhang, Pengfei& Wang, Youyang. 2018. Changes in Pore Structure of Coal Caused by CS2 Treatment and Its Methane Adsorption Response. Geofluids،Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1158476
Modern Language Association (MLA)
Chen, Run…[et al.]. Changes in Pore Structure of Coal Caused by CS2 Treatment and Its Methane Adsorption Response. Geofluids No. 2018 (2018), pp.1-11.
https://search.emarefa.net/detail/BIM-1158476
American Medical Association (AMA)
Chen, Run& Qin, Yong& Zhang, Pengfei& Wang, Youyang. Changes in Pore Structure of Coal Caused by CS2 Treatment and Its Methane Adsorption Response. Geofluids. 2018. Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1158476
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1158476