Influence of Pore Size on Ethylene Hydrate Formation in Carbon Materials

• Main Authors: Wei, Yajuan, Sun, Yan, Su, Wei, Liu, Jia
• Other Authors: Liu, J (reprint author), Peking Univ, Coll Engn, Beijing 100086, Peoples R China., Tianjin Univ, Sch Sci, Dept Chem, Tianjin 300072, Peoples R China., Tianjin Univ, Sch Chem Engn & Technol, High Pressure Adsorpt Lab, Tianjin 300072, Peoples R China., Peking Univ, Coll Engn, Beijing 100086, Peoples R China.
• Format: Journal/Newspaper
• Language: English
• Published: adsorption science technology 2014
• Subjects: POROUS-MEDIA; PHASE-EQUILIBRIA; METHANE HYDRATE; SILICA-GELS; MESOPOROUS SILICA; ACTIVATED CARBON; WATER; STORAGE; TEMPERATURES; SYSTEM; Methane hydrate
• Online Access: https://hdl.handle.net/20.500.11897/388476

The formation of gas hydrates in porous carbon materials is highly dependent on the potential field in the pores. The formation of ethylene hydrate from water and ethylene in carbon materials with different pore-size distributions was investigated at 303 K. The potential field in the pores was favourable for the formation of gas hydrate when the pores were less than 1.2 nm. By comparison, when the pores were larger than 6 nm, little ethylene hydrate was formed. When the pore sizes were less than 2.35 nm, the ethylene molecules occupied both the large (L) and small (S) cavities simultaneously. However, when the pore sizes were greater than 2.82 nm, only the L cavities were occupied. This was proven by measuring the molar ratio of the water to ethylene at equilibrium. Chemistry, Applied Chemistry, Physical Engineering, Chemical SCI(E) EI 1 ARTICLE [e-mail] 9 717-724 32