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Insights into CO2 Capture by Flue Gas Hydrate Formation: Gas Composition Evolution in Systems Containing Gas Hydrates and Gas Mixtures at Stable Pressures
- Hassanpouryouzband, Aliakbar, Yang, Jinhai, Tohidi, Bahman, Chuvilin, Evgeny, Istomin, Vladimir, Bukhanov, Boris, Cheremisin, Alexey
- ACS sustainable chemistry & engineering 2018 v.6 no.5 pp. 5732-5736
- carbon dioxide, flue gas, gas hydrate, power plants, temperature, thermodynamics
- Capturing CO₂ from power plant flue gas through hydrate formation is starting to be applied on an industrial scale. Several methods have been developed, and a large number of experiments have been conducted in order to investigate ways of increasing their efficiency. However, most of them suffer from a lack of detailed kinetic studies. In this Letter, we present a highly accurate method to investigate the kinetics of flue gas hydrate formation. Preliminary results are detailed at three different temperatures. It has been found that more than 40% of CO₂ capture in the form of hydrates occurs after reaching the final pressure. Therefore, statistically constant pressure cannot be used as a sign of thermodynamic equilibrium. The results obtained from this study are important for optimizing CO₂ separation operations thus maximizing efficiency and reducing economic barriers. In addition, they are also useful in studying the kinetics of hydrate formation in other gas mixture systems.