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Seo, Yongwon
Advanced Clean Energy Lab (ACE Lab)
Research Interests
  • Gas Hydrates, Greenhouse Gas, Clean Energy

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Semiclathrate-based CO2 capture from flue gas in the presence of tetra-n-butyl ammonium chloride (TBAC)

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Title
Semiclathrate-based CO2 capture from flue gas in the presence of tetra-n-butyl ammonium chloride (TBAC)
Author
Kim, SoyoungKang, Seong-PilSeo, Yongwon
Issue Date
2015-09
Publisher
ELSEVIER SCIENCE SA
Citation
CHEMICAL ENGINEERING JOURNAL, v.276, pp.205 - 212
Abstract
In this study, we investigated semiclathrate-based CO2 capture from the simulated flue gas mixture of fossil fuel-fired power plants in the presence of tetra-n-butyl ammonium chloride (TBAC), primarily focusing on thermodynamic, kinetic, and spectroscopic aspects. The semiclathrate phase equilibria of the quaternary CO2 (20%) + N-2 (80%) + TBAC (1.0, 3.3, and 5.0 mol%) + water mixtures showed that TBAC solutions form semiclathrates with guest gases at significantly stabilized pressure and temperature conditions. CO2 was found to be selectively captured and thus enriched to approximately 60% in the semiclathrate phase. CO2 selectivity in the semiclathrate phase was independent of TBAC concentrations, even though the 3.3 mol% TBAC solution yielded a higher gas uptake and a larger CO2 concentration change in the vapor phase during TBAC semiclathrate formation than the 1.0 mol% TBAC solution. In addition, Raman spectroscopic results demonstrated that both CO2 and N-2 are captured in the TBAC semiclathrate lattices and that there is no structural transition due to the enclathration of guest gases. The overall experimental results are very informative in understanding selective partitioning of flue gas mixtures and guest distributions in the TBAC semiclathrates, may thus be useful in the development of the CO2 capture process using semiclathrates. (C) 2015 Elsevier B.V. All rights reserved
URI
https://scholarworks.unist.ac.kr/handle/201301/17049
URL
http://www.sciencedirect.com/science/article/pii/S1385894715005732
DOI
10.1016/j.cej.2015.04.083
ISSN
1385-8947
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