Gas storage in “dry water” and “dry gel” clathrates

Carter, B. O., Wang, W., Adams, D. J. and Cooper, A. I. (2010) Gas storage in “dry water” and “dry gel” clathrates. Langmuir, 26(5), pp. 3186-3193. (doi: 10.1021/la903120p) (PMID:19938804)

Abstract

“Dry water” (DW) is a free-flowing powder prepared by mixing water, hydrophobic silica particles, and air at high speeds. We demonstrated recently that DW can be used to dramatically enhance methane uptake rates in methane gas hydrate (MGH). Here, we expand on our initial work, demonstrating that DW can be used to increase the kinetics of formation of gas clathrates for gases other than methane, such as CO2 and Kr. We also show that the stability of the system toward coalescence can be increased via the inclusion of a gelling agent to form a “dry gel”, thus dramatically improving the recyclability of the material. For example, the addition of gellan gum allows effective reuse over at least eight clathration cycles without the need for reblending. DW and its “dry gel” modification may represent a potential platform for recyclable gas storage or gas separation on a practicable time scale in a static, unmixed system.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Adams, Dave
• Authors: Carter, B. O., Wang, W., Adams, D. J., and Cooper, A. I.
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: Langmuir
• Publisher: American Chemical Society
• ISSN: 0743-7463
• ISSN (Online): 1520-5827
• Published Online: 25 November 2009