Kinetics of the Formation and Dissociation of Gas Hydrates from CO2-CH4 Mixtures

Energies

Kristine Horvat¹  Prasad Kerkar¹  Keith Jones¹ 

[1] Materials Science and Engineering Department, Stony Brook University, Stony Brook, New York, NY 11794, USA; E-Mails:

关键词: methane hydrate;    carbon dioxide hydrate;    mixed gas hydrate;    carbon sequestration;    sodium dodecyl sulfate;   

DOI  :  10.3390/en5072248

来源: mdpi

【 摘 要 】

Sequestration of carbon dioxide (CO₂) in the form of its hydrates in natural methane (CH₄) hydrate reservoirs, via CO₂/CH₄ exchange, is an attractive pathway that also yields valuable CH₄ gas as product. In this paper, we describe a macroscale experiment to form CO₂ and CH₄-CO₂ hydrates, under seafloor-mimic conditions, in a vessel fitted with glass windows that provides visualization of hydrates throughout formation and dissociation processes. Time resolved pressure and temperature data as well as images of hydrates are presented. Quantitative gas conversions with pure CO₂, calculated from gas chromatographic measurements yielded values that range from 23 – 59% that correspond to the extent of formed hydrates. In CH₄-rich CH₄-CO₂ mixed gas systems, CH₄ hydrates were found to form preferentially.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.