Experimental study of carbon dioxide gas hydrate formation in the presence of zwitterionic compounds
| Autor: | Hamed Hashemi, Marta Królikowska, Paramespri Naidoo, Deresh Ramjugernath, Marek Królikowski, Urszula Domańska |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Carbon dioxide clathrate Aqueous solution Chemistry Thermodynamic equilibrium Clathrate hydrate 02 engineering and technology Atmospheric temperature range 010402 general chemistry 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences chemistry.chemical_compound 020401 chemical engineering Carbon dioxide Physical chemistry General Materials Science 0204 chemical engineering Physical and Theoretical Chemistry Mass fraction Alkyl |
| Zdroj: | The Journal of Chemical Thermodynamics. 137:94-100 |
| ISSN: | 0021-9614 |
| Popis: | In this work, the effect of a series of zwitterionic compounds (ZIs) aqueous solutions on the thermodynamic equilibrium and kinetic conditions of carbon dioxide hydrate formation is investigated. The hydrate dissociation conditions for (CO2 + ZI + water) systems are studied at different concentrations of ZI, viz. (0.10; 0.20, 0.30) mass fraction. The experiment was performed over a temperature range of T = (272–282) K and pressures range of p = (1.27–4.31 MPa) using a high pressure equilibrium cell. In this work the following ZIs: 4-(triethylammonio)butane-1-sulfonate [N222C4S], 4-(tributylammonio)-butane-1-sulfonate [N444C4S] and 4-(tributylphosphonio) butane-1-sulfonate [P444C4S] were investigated, therefore it was possible to determine the influence of alkyl chain length and the structure of the core atom on the kinetic behaviour of carbon dioxide gas hydrate formation. The results show that the gas hydrate phase equilibrium in the presence of zwitterionic compounds is shifted to higher pressures and lower temperatures so that the ZIs act slightly as a thermodynamic inhibitor of hydrate formation. |
| Databáze: | OpenAIRE |
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