Enhanced efficiency of salt removal from brine for cyclopentane hydrates by washing, centrifuging, and sweating

Experimental measurement and thermodynamic modeling of cyclopentane hydrates with NaCl, KCl, CaCl2, or NaCl‐KCl present

“…In comparison with literature, this value is totally identical to the data published by Dendy Sloan et al, Dirdal et al, Sefidroodi et al, Davidson et al and Palmer, while Han et al reported a small different value of 7.8°C. This comparison indicates that this value is popular in the community of researchers and can probably be considered as a benchmark for the equilibrium condition of CPH.…”

“…It can separate guest molecules, as well as remove water from an aqueous solution, or even water vapor. Consequently, better understanding, controlling, and or modifying the hydrate crystallization process may prove to be crucial for desalination processes, solute separation or purification, metal recovery, or even wastewater treatment . Moreover, some authors have suggested to use CP as large guest molecules for the hydrate‐based separation process.…”

“…Among the relevant articles on CPH in brine, the works of Kishimoto et al (morphology of CPH in presence of NaCl), Zylyftari et al (rheological and thermodynamic influences of NaCl on CPH), Corak et al (effect of subcooling and amount of hydrate former on formation of CPH in brine), Han et al (efficiency of salt removal from brine by CPH using three secondary treatment methods: washing, centrifuging, and sweating), Lv et al (desalination by forming hydrate from brine in CP dispersion systems) should be mentioned. Unfortunately, while Nakajima et al determined the heat of dissociation, as well as the equilibrium temperature of CPH formed from a mixture of CP‐in‐water emulsions, no salts were used.…”

Accurate measurement of phase equilibria and dissociation enthalpies of HFC-134a hydrates in the presence of NaCl for potential application in desalination

“…In desalination via gas hydrate formation, appropriate hydrateforming substances should be determined in order to operate the process in milder pressure and temperature conditions for economic competitiveness. Thermodynamic and kinetic studies have been conducted on possible guests such as SF 6 , hydrofluorocarbons, CO 2 , cyclopentane, and cyclohexane for hydrate-based desalination [5,8,[12][13][14][15].…”

“…Gas hydrates have been utilized in various fields: from exploitation of naturally occurring gas hydrates, natural gas storage and transportation, carbon dioxide capture and sequestration, to desalination [3][4][5][6][7][8][9][10]. Among their various applications, hydrate-based desalination has recently attracted significant attention because the need for desalination is increasing due to water shortages and the sources for desalination are not limited to seawater.…”