Semiclathrate hydrates of methane + tetraalkylammonium hydroxides
Clathrate hydrate crystallisation is a promising method for the capture, storage and transport of methane, but one of its major technical barriers is the high pressure required for hydrate formation. In search of suitable and cost-effective promoters for hydrate-based gas processing and handling, th...
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:590980 2023-05-15T17:11:46+02:00 Semiclathrate hydrates of methane + tetraalkylammonium hydroxides Su, Yuan Searles, Debra J. Wang, Liguang 2017-09-01 https://espace.library.uq.edu.au/view/UQ:590980 eng eng Elsevier doi:10.1016/j.fuel.2017.05.005 issn:0016-2361 issn:1873-7153 orcid:0000-0003-1346-8318 orcid:0000-0002-6153-2209 1092846 Not set Methane hydrate Semiclathrate hydrate Phase equilibrium Gas uptake Organic salt Gas hydrate promotion 1500 Chemical Engineering 1605 Organic Chemistry 2102 Energy Engineering and Power Technology 2103 Fuel Technology Journal Article 2017 ftunivqespace https://doi.org/10.1016/j.fuel.2017.05.005 2020-12-08T01:38:08Z Clathrate hydrate crystallisation is a promising method for the capture, storage and transport of methane, but one of its major technical barriers is the high pressure required for hydrate formation. In search of suitable and cost-effective promoters for hydrate-based gas processing and handling, this paper reports the pressures required for the formation of clathrate hydrates of methane in the presence of one of the following three quaternary ammonium salts with the same anion (OH) but different carbon chain lengths: tetrapropylammonium hydroxide (TPrAOH), tetrabutylammonium hydroxide (TBAOH), and tetrapentylammonium hydroxide (TPeAOH). The phase boundary between hydrate–liquid–vapor (H-L-V) phases and liquid–vapor (L-V) phases in the temperature range of 281.81–301.91 K and pressure range of 4.46–16.05 MPa was determined using an isochoric equilibrium step-heating pressure search method. The results show that TBAOH is a strong thermodynamic promoter for methane hydrate formation whereas TPrAOH and TPeAOH are weak hydrate inhibitors. We then compared the phase equilibrium conditions and gas storage capacities of TBAOH and a widely studied hydrate promoter, tetrabutylammoium bromide (TBAB). It was found that at a given dosage, TBAOH substantially outperformed TBAB in thermodynamically promoting methane hydrate formation and with an appropriate driving force TBAOH gave only slightly lower methane storage capacity than TBAB. These features make TBAOH a prospective promoter for hydrate-based methane storage and transport. Article in Journal/Newspaper Methane hydrate The University of Queensland: UQ eSpace Fuel 203 618 626 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Methane hydrate Semiclathrate hydrate Phase equilibrium Gas uptake Organic salt Gas hydrate promotion 1500 Chemical Engineering 1605 Organic Chemistry 2102 Energy Engineering and Power Technology 2103 Fuel Technology |
spellingShingle |
Methane hydrate Semiclathrate hydrate Phase equilibrium Gas uptake Organic salt Gas hydrate promotion 1500 Chemical Engineering 1605 Organic Chemistry 2102 Energy Engineering and Power Technology 2103 Fuel Technology Su, Yuan Searles, Debra J. Wang, Liguang Semiclathrate hydrates of methane + tetraalkylammonium hydroxides |
topic_facet |
Methane hydrate Semiclathrate hydrate Phase equilibrium Gas uptake Organic salt Gas hydrate promotion 1500 Chemical Engineering 1605 Organic Chemistry 2102 Energy Engineering and Power Technology 2103 Fuel Technology |
description |
Clathrate hydrate crystallisation is a promising method for the capture, storage and transport of methane, but one of its major technical barriers is the high pressure required for hydrate formation. In search of suitable and cost-effective promoters for hydrate-based gas processing and handling, this paper reports the pressures required for the formation of clathrate hydrates of methane in the presence of one of the following three quaternary ammonium salts with the same anion (OH) but different carbon chain lengths: tetrapropylammonium hydroxide (TPrAOH), tetrabutylammonium hydroxide (TBAOH), and tetrapentylammonium hydroxide (TPeAOH). The phase boundary between hydrate–liquid–vapor (H-L-V) phases and liquid–vapor (L-V) phases in the temperature range of 281.81–301.91 K and pressure range of 4.46–16.05 MPa was determined using an isochoric equilibrium step-heating pressure search method. The results show that TBAOH is a strong thermodynamic promoter for methane hydrate formation whereas TPrAOH and TPeAOH are weak hydrate inhibitors. We then compared the phase equilibrium conditions and gas storage capacities of TBAOH and a widely studied hydrate promoter, tetrabutylammoium bromide (TBAB). It was found that at a given dosage, TBAOH substantially outperformed TBAB in thermodynamically promoting methane hydrate formation and with an appropriate driving force TBAOH gave only slightly lower methane storage capacity than TBAB. These features make TBAOH a prospective promoter for hydrate-based methane storage and transport. |
format |
Article in Journal/Newspaper |
author |
Su, Yuan Searles, Debra J. Wang, Liguang |
author_facet |
Su, Yuan Searles, Debra J. Wang, Liguang |
author_sort |
Su, Yuan |
title |
Semiclathrate hydrates of methane + tetraalkylammonium hydroxides |
title_short |
Semiclathrate hydrates of methane + tetraalkylammonium hydroxides |
title_full |
Semiclathrate hydrates of methane + tetraalkylammonium hydroxides |
title_fullStr |
Semiclathrate hydrates of methane + tetraalkylammonium hydroxides |
title_full_unstemmed |
Semiclathrate hydrates of methane + tetraalkylammonium hydroxides |
title_sort |
semiclathrate hydrates of methane + tetraalkylammonium hydroxides |
publisher |
Elsevier |
publishDate |
2017 |
url |
https://espace.library.uq.edu.au/view/UQ:590980 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
doi:10.1016/j.fuel.2017.05.005 issn:0016-2361 issn:1873-7153 orcid:0000-0003-1346-8318 orcid:0000-0002-6153-2209 1092846 Not set |
op_doi |
https://doi.org/10.1016/j.fuel.2017.05.005 |
container_title |
Fuel |
container_volume |
203 |
container_start_page |
618 |
op_container_end_page |
626 |
_version_ |
1766068532973404160 |