| 학회 |
한국공업화학회 |
| 학술대회 |
2016년 가을 (10/26 ~ 10/28, 제주국제컨벤션센터(ICCJEJU)) |
| 권호 |
20권 2호 |
| 발표분야 |
환경에너지_포스터 |
| 제목 |
The effect of operating gas pressure on CO2 gas hydrate-induced quick-freezing |
| 초록 |
Desalination using freezing has recently attracted attentions for less heat of fusion for water (333 kJ/kg) than evaporation (2,500 kJ/kg). CO2 gas hydrate-induced quick-freezing is a lately developed freezing method using the dissociation energy of CO2 gas hydrate at ventilation. CO2 gas hydrate is an ice-like form with CO2 guest molecule under pressurized condition. The object of this study is to investigate the effect of operating gas pressure on CO2 gas hydrate-induced quick-freezing. Internal temperature shift during the process was monitored to evaluate energy transfer. It was found that two major energies were involved in the process: decarbonation of CO2 gas and dissociation of gas hydrate. DSC (Differential scanning calorimetry) study showed the heat of dissociation (500.13 J/g) was the dominant driving force caused quick-freezing than decarbonation (34.48 J/g). With increasing operating gas pressure, more gas was captured in the solution and caused more drop of temperature. |
| 저자 |
김우정, 한상우, 전병문, 이형개, 권영남
|
| 소속 |
UNIST |
| 키워드 |
Carbon dioxide; Gas hydrate; Pressure; Heat of fusion
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| E-Mail |
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