Formation of cyclopentane - methane hydrates in brine systems and characteristics of dissolved ions

Qiu-Nan Lv, Xiao-Sen Li and Zhao-Yang Chen

Applied Energy, 2016, vol. 184, issue C, 482-490

Abstract: Based on the hot brine in situ seafloor prepared for marine NGHs exploitation, the formation of hydrates and the characteristics of dissolved ions were investigated for the cyclopentane (CP)-methane-NaCl solution (3.5%) system. Both the gas consumption and the solution salinity influenced by two factors – the flow rate of gas (Qg) and the mass fraction of CP (MCP) -were discussed. On one hand, the gas consumption went up at a lower MCP (3.950wt%) while dropped down at a higher MCP (8.340 or 18.775wt%) with the increase of Qg. Nevertheless, higher mass fraction of CP behaved more favorable for the gas consumption. On the other hand, there would be a similar trend that the salinity of remaining liquid increased firstly and then decreased with the reaction time at any fixed Qg and MCP, which might be attributed to the adsorption of Na+ and Cl− on the surface of hydrate. Furthermore, PXRD analysis of the hydrate was conducted to confirm this explanation. And it was confirmed that the ion of Na+ or Cl− did not play any role in the construction of hydrate cages. Meanwhile, CP was enclosed in large cavities (51264) while CH4 was mainly enclosed in the small cavities (512).

Keywords: Cyclopentane-methane hydrate; Hot brine; Bubble; Salinity; PXRD (search for similar items in EconPapers)
Date: 2016
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/S030626191631474X
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:appene:v:184:y:2016:i:c:p:482-490

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

DOI: 10.1016/j.apenergy.2016.10.035

Access Statistics for this article

Applied Energy is currently edited by J. Yan

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