Experimental study of gas recovery behaviors from methane hydrate-bearing sediments by CO2 replacement below freezing point

Xuemin Zhang, Shanling Zhang, Qingqing Liu, Tingting Huang, Huijie Yang, Jinping Li, Yingmei Wang, Qingbai Wu and Chen Chen

Energy, 2024, vol. 288, issue C

Abstract: Natural gas hydrate (NGH) is one of the most promising clean energy sources in the future because of its huge reserves and cleanliness, and the CO2 replacement method can realize the safe extraction of NGH and the underground storage of greenhouse gases. This study investigates the influence of quartz sand size and ice content on hydrate replacement characteristics below freezing point conditions. Results indicate that, at a temperature of 271.65 K, when particle sizes range from 250 μm to 500 μm, there is an observed increase in CH4 recovery alongside a concurrent decrease in CO2 sequestration as particle size decreases. Additionally, when maintaining a fixed 500 μm particle size, the proportion of quartz sand positively correlates with CH4 recovery. Furthermore, the presence of quartz sand grains in an ice powder system can improve the replacement effect. By contrast, the presence of quartz sand significantly enhances the CO2 sequestration ratio more than the CH4 recovery ratio. In mixed ice-sand porous media, CO2 sequestration can be enhanced from 0.0496 mol to 0.1012 mol, representing a 104 % increase in CO2 sequestration molarity when compared to the pure ice conditions.

Keywords: Natural gas hydrate; Porous media; Below freezing point; CH4 recovery; CO2 sequestration (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544223032309
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:288:y:2024:i:c:s0360544223032309

DOI: 10.1016/j.energy.2023.129836

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().