BROWSE

Related Researcher

Author

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

ITEM VIEW & DOWNLOAD

CO2 capture from simulated fuel gas mixtures using semiclathrate hydrates formed by quaternary ammonium salts

Cited 8 times inthomson ciCited 7 times inthomson ci
Title
CO2 capture from simulated fuel gas mixtures using semiclathrate hydrates formed by quaternary ammonium salts
Author
Park, SungwonLee, SeungminLee, YoungjunSeo, Yongwon
Keywords
Compositional analysis; Hydrate dissociation conditions; Pre-combustion co; Quaternary ammonium salt; Semi-clathrate hydrates; Spectroscopic studies; Stability condition; Structural transitions
Issue Date
201307
Publisher
AMER CHEMICAL SOC
Citation
ENVIRONMENTAL SCIENCE & TECHNOLOGY, v.47, no.13, pp.7571 - 7577
Abstract
In order to investigate the feasibility of semiclathrate hydrate-based precombustion CO2 capture, thermodynamic, kinetic, and spectroscopic studies were undertaken on the semiclathrate hydrates formed from a fuel gas mixture of H2 (60%) + CO2 (40%) in the presence of quaternary ammonium salts (QASs) such as tetra-n-butylammonium bromide (TBAB) and fluoride (TBAF). The inclusion of QASs demonstrated significantly stabilized hydrate dissociation conditions. This effect was greater for TBAF than TBAB. However, due to the presence of dodecahedral cages that are partially filled with water molecules, TBAF showed a relatively lower gas uptake than TBAB. From the stability condition measurements and compositional analyses, it was found that with only one step of semiclathrate hydrate formation with the fuel gas mixture from the IGCC plants, 95% CO2 can be enriched in the semiclathrate hydrate phase at room temperature. The enclathration of both CO2 and H2 in the cages of the QAS semiclathrate hydrates and the structural transition that results from the inclusion of QASs were confirmed through Raman and 1H NMR measurements. The experimental results obtained in this study provide the physicochemical background required for understanding selective partitioning and distributions of guest gases in the QAS semiclathrate hydrates and for investigating the feasibility of a semiclathrate hydrate-based precombustion CO2 capture process.
URI
Go to Link
DOI
http://dx.doi.org/10.1021/es400966x
ISSN
0013-936X
Appears in Collections:
UEE_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU