Characteristics of CO2 Hydrate Formation and Dissociation in Glass Beads and Silica Gel

Energies

Mingjun Yang¹  Yongchen Song¹  Xuke Ruan¹  Yu Liu¹  Jiafei Zhao¹ 

[1] Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, China; E-Mails:

关键词: CO₂ hydrate;    porous medium;    equilibrium condition;   

DOI  :  10.3390/en5040925

来源: mdpi

【 摘 要 】

CO₂ hydrate formation and dissociation is crucial for hydrate-based CO₂ capture and storage. Experimental and calculated phase equilibrium conditions of carbon dioxide (CO₂) hydrate in porous medium were investigated in this study. Glass beads were used to form the porous medium. The experimental data were generated using a graphical method. The results indicated the decrease of pore size resulted in the increase of the equilibrium pressure of CO₂ hydrate. Magnetic resonance imaging (MRI) was used to investigate the priority formation site of CO₂ hydrate in different porous media, and the results showed that the hydrate form firstly in BZ-02 glass beads under the same pressure and temperature. An improved model was used to predict CO₂ hydrate equilibrium conditions, and the predictions showed good agreement with experimental measurements.

【 授权许可】

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