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CO2 hydrate slurry as a secondary refrigerant.

Number: pap. n. 119

Author(s) : CHOI J. W., JUNG C. W., KANG Y. T.

Summary

CO2 emission from the burning of fossil fuels have been confirmed as the main cause of greenhouse gas emission, which results in global warming and subsequent climate change. To mitigate the problem, many researchers have worked in the field of CO2 capture. There are different ways to capture CO2, such as SimTeche (CO2 hydrate slurry formation), Amine, Selexol, etc. In particular, the simteche process is less expensive compared to other processes. Besides, CO2 hydrate slurry can be used in a lot of practical applications such as separation processes, CO2 storage-transportation and CO2 sequestration. However, CO2 hydrate slurry is formed at low temperature and high pressure. For this reason, it requires a high energy consumption cost. In this study, we use THF (Tetrahydrofuran) and Al2O3 (Aluminum oxide) as surfactants to analyze the effects on the CO2 hydrate slurry formation. For instance, the addition of THF reduces the required CO2 hydrate slurry formation pressure (from 1.5 MPa to 0.1 MPa at 0oC), which is important for reducing high compression costs. Moreover, the presence of THF decreases the CO2 hydrate slurry nucleation time. In this study, it is found that the amount of CO2 hydrate slurry is produced more in DI-water. These surfactants not only enhance the CO2 hydrate slurry formation at atmospheric pressure but also increase the amount of the CO2 hydrate slurry. As a result, CO2 hydrate slurry might be more cost-effective for further use as a secondary refrigerant or in CO2 absorption applications.

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Pages: 5 p.

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Details

  • Original title: CO2 hydrate slurry as a secondary refrigerant.
  • Record ID : 30013714
  • Languages: English
  • Source: International sorption heat pump conference (ISHPC2014), College Park, United States, March 31-April 2, 2014.
  • Publication date: 2014/03/02

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