| 학회 |
한국화학공학회 |
| 학술대회 |
2015년 가을 (10/21 ~ 10/23, 일산 KINTEX) |
| 권호 |
21권 2호, p.1927 |
| 발표분야 |
열역학 |
| 제목 |
Thermodynamic and Spectroscopic Studies of Phase Equilibria of HFC-134a (1,1,1,2-Tetrafluoroethane) Hydrate in NaCl Aqueous Solutions |
| 초록 |
Gas hydrates can be applied to desalination because they exclude salts or ions from cage lattices during crystallization. However, gas hydrates normally require high-pressure and low-temperature conditions. For gas hydrate-based desalination to be competitive, guest gases which require low pressures for gas hydrate formation should be sought. In this study, HFC-134a, which is widely used as a refrigerant and forms gas hydrates at mild conditions, was used as a guest gas for desalination. Three-phase (hydrate (H)-liquid water(LW)-vapor (V)) equilibria of the HFC-134a + water mixture in NaCl solutions of 3.5 and 8.0wt% were measured to determine the inhibition effect of NaCl on gas hydrate stability conditions using both a conventional isochoric method and a step-wise differential scanning calorimeter (DSC) method. Heat of dissociation of HFC-134a hydrate was measured to be 147.3kJ/g-hydrate using a high pressure DSC. Furthermore, powder X-Ray diffraction (PXRD) revealed that HFC-134a forms a sII hydrate. The experimental results obtained in this study can be utilized as fundamental data for the hydrate-based desalination process. |
| 저자 |
서용원1, 이주동2, 강경찬2, 이승민2, 최원중1, 이요한1, 이동영1
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| 소속 |
1울산과학기술대, 2한국생산기술(연) |
| 키워드 |
Hydrate; Desalination; HFC-134a (1; 1; 1; 2-Tetrafluoroethane)
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| E-Mail |
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| 원문파일 |
초록 보기 |
