Semiclathrate hydrate phase behaviour and structure for CH4 in the presence of tetrabutylammonium fluoride (TBAF)
Phase behaviour including phase equilibria and dissociation enthalpies and structure of double semiclathrate hydrates formed with tetrabutylammonium fluoride (TBAF) + CH4 were measured to evaluate the performance of TBAF for hydrate based industrial applications. The phase equilibria and the dissoci...
Published in: | The Journal of Chemical Thermodynamics |
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ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
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Online Access: | http://ir.gig.ac.cn/handle/344008/50524 https://doi.org/10.1016/j.jct.2019.04.004 |
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ftchacadscgigcas:oai:ir.gig.ac.cn:344008/50524 2023-05-15T17:12:03+02:00 Semiclathrate hydrate phase behaviour and structure for CH4 in the presence of tetrabutylammonium fluoride (TBAF) Shi, Lingli Liang, Deqing 2019-08-01 http://ir.gig.ac.cn/handle/344008/50524 https://doi.org/10.1016/j.jct.2019.04.004 英语 eng ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD JOURNAL OF CHEMICAL THERMODYNAMICS http://ir.gig.ac.cn/handle/344008/50524 doi:10.1016/j.jct.2019.04.004 Thermodynamics Chemistry Tetrabutylammonium fluoride Methane hydrate Phase equilibria Dissociation enthalpies Raman spectra Physical N-BUTYLAMMONIUM BROMIDE PLUS CARBON-DIOXIDE EQUILIBRIUM CONDITIONS DISSOCIATION CONDITIONS GAS-MIXTURES AQUEOUS-SOLUTIONS HALIDE BROMIDE COLD-STORAGE CO2 CAPTURE 期刊论文 2019 ftchacadscgigcas https://doi.org/10.1016/j.jct.2019.04.004 2020-12-22T07:22:33Z Phase behaviour including phase equilibria and dissociation enthalpies and structure of double semiclathrate hydrates formed with tetrabutylammonium fluoride (TBAF) + CH4 were measured to evaluate the performance of TBAF for hydrate based industrial applications. The phase equilibria and the dissociation enthalpies for TBAF + CH4 semiclathrate hydrate (SCH) with (0.02-0.15) salt mass fraction were obtained by employing the isochoric pressure-search method and calculated from the experimental data with Clausius-Clapeyron equation, respectively. A confocal Raman spectrometer was applied to analyze the structure of (TBAF + CH4) SCHs. Data showed that TBAF strongly enhanced the stability of CH4 hydrates by increasing the equilibrium temperature at a given pressure. The Raman spectra revealed that small 5(12) cages of TBAF hydrates could trap CH4 molecules. In particular, the Raman spectra of double TBAF + CH4 SCHs, as compared with those of pure TBAF SCHs, indicated that the large cages which already trapped the cation of TBAF also had the possibility of encaging CH4 molecules at low salt concentrations (<0.12 mass fraction). (C) 2019 Elsevier Ltd. Report Methane hydrate Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences) The Journal of Chemical Thermodynamics 135 252 259 |
institution |
Open Polar |
collection |
Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchacadscgigcas |
language |
English |
topic |
Thermodynamics Chemistry Tetrabutylammonium fluoride Methane hydrate Phase equilibria Dissociation enthalpies Raman spectra Physical N-BUTYLAMMONIUM BROMIDE PLUS CARBON-DIOXIDE EQUILIBRIUM CONDITIONS DISSOCIATION CONDITIONS GAS-MIXTURES AQUEOUS-SOLUTIONS HALIDE BROMIDE COLD-STORAGE CO2 CAPTURE |
spellingShingle |
Thermodynamics Chemistry Tetrabutylammonium fluoride Methane hydrate Phase equilibria Dissociation enthalpies Raman spectra Physical N-BUTYLAMMONIUM BROMIDE PLUS CARBON-DIOXIDE EQUILIBRIUM CONDITIONS DISSOCIATION CONDITIONS GAS-MIXTURES AQUEOUS-SOLUTIONS HALIDE BROMIDE COLD-STORAGE CO2 CAPTURE Shi, Lingli Liang, Deqing Semiclathrate hydrate phase behaviour and structure for CH4 in the presence of tetrabutylammonium fluoride (TBAF) |
topic_facet |
Thermodynamics Chemistry Tetrabutylammonium fluoride Methane hydrate Phase equilibria Dissociation enthalpies Raman spectra Physical N-BUTYLAMMONIUM BROMIDE PLUS CARBON-DIOXIDE EQUILIBRIUM CONDITIONS DISSOCIATION CONDITIONS GAS-MIXTURES AQUEOUS-SOLUTIONS HALIDE BROMIDE COLD-STORAGE CO2 CAPTURE |
description |
Phase behaviour including phase equilibria and dissociation enthalpies and structure of double semiclathrate hydrates formed with tetrabutylammonium fluoride (TBAF) + CH4 were measured to evaluate the performance of TBAF for hydrate based industrial applications. The phase equilibria and the dissociation enthalpies for TBAF + CH4 semiclathrate hydrate (SCH) with (0.02-0.15) salt mass fraction were obtained by employing the isochoric pressure-search method and calculated from the experimental data with Clausius-Clapeyron equation, respectively. A confocal Raman spectrometer was applied to analyze the structure of (TBAF + CH4) SCHs. Data showed that TBAF strongly enhanced the stability of CH4 hydrates by increasing the equilibrium temperature at a given pressure. The Raman spectra revealed that small 5(12) cages of TBAF hydrates could trap CH4 molecules. In particular, the Raman spectra of double TBAF + CH4 SCHs, as compared with those of pure TBAF SCHs, indicated that the large cages which already trapped the cation of TBAF also had the possibility of encaging CH4 molecules at low salt concentrations (<0.12 mass fraction). (C) 2019 Elsevier Ltd. |
format |
Report |
author |
Shi, Lingli Liang, Deqing |
author_facet |
Shi, Lingli Liang, Deqing |
author_sort |
Shi, Lingli |
title |
Semiclathrate hydrate phase behaviour and structure for CH4 in the presence of tetrabutylammonium fluoride (TBAF) |
title_short |
Semiclathrate hydrate phase behaviour and structure for CH4 in the presence of tetrabutylammonium fluoride (TBAF) |
title_full |
Semiclathrate hydrate phase behaviour and structure for CH4 in the presence of tetrabutylammonium fluoride (TBAF) |
title_fullStr |
Semiclathrate hydrate phase behaviour and structure for CH4 in the presence of tetrabutylammonium fluoride (TBAF) |
title_full_unstemmed |
Semiclathrate hydrate phase behaviour and structure for CH4 in the presence of tetrabutylammonium fluoride (TBAF) |
title_sort |
semiclathrate hydrate phase behaviour and structure for ch4 in the presence of tetrabutylammonium fluoride (tbaf) |
publisher |
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD |
publishDate |
2019 |
url |
http://ir.gig.ac.cn/handle/344008/50524 https://doi.org/10.1016/j.jct.2019.04.004 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
JOURNAL OF CHEMICAL THERMODYNAMICS http://ir.gig.ac.cn/handle/344008/50524 doi:10.1016/j.jct.2019.04.004 |
op_doi |
https://doi.org/10.1016/j.jct.2019.04.004 |
container_title |
The Journal of Chemical Thermodynamics |
container_volume |
135 |
container_start_page |
252 |
op_container_end_page |
259 |
_version_ |
1766068804405690368 |