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Ammonium hydroxide ILs as dual-functional gas hydrate inhibitors for binary mixed gas (carbon dioxide and methane) hydrates

In this study the dual-functionality of four ammonium based Ionic Liquids (AILs) having hydroxide anion namely: tetramethyl ammonium hydroxide (TMAOH), tetraethyl ammonium hydroxide (TEAOH), tetrapropyl ammonium hydroxide (TPrAOH) and, tetrabutyl ammonium hydroxide (TBAOH) is investigated on binary...

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Main Authors: Khan, M.S., Lal, B., Shariff, A.M., Mukhtar, H.
Format: Article
Published: 2019
Online Access:http://scholars.utp.edu.my/id/eprint/22182/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85055154866&doi=10.1016%2fj.molliq.2018.10.076&partnerID=40&md5=35c3071ef15c41ab12ba265bf7b9f7c0
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spelling oai:scholars.utp.edu.my:221822023-04-11T04:14:36Z http://scholars.utp.edu.my/id/eprint/22182/ Ammonium hydroxide ILs as dual-functional gas hydrate inhibitors for binary mixed gas (carbon dioxide and methane) hydrates Khan, M.S. Lal, B. Shariff, A.M. Mukhtar, H. In this study the dual-functionality of four ammonium based Ionic Liquids (AILs) having hydroxide anion namely: tetramethyl ammonium hydroxide (TMAOH), tetraethyl ammonium hydroxide (TEAOH), tetrapropyl ammonium hydroxide (TPrAOH) and, tetrabutyl ammonium hydroxide (TBAOH) is investigated on binary mixed gas hydrates (50 mol-50 mol CO2-CH4). For thermodynamic behaviour, the hydrate liquid vapour equilibrium (HLVE) data are generated in the presence of 10 wt AILs solutions by the T-Cycle method at temperature and pressure conditions of 275.0�284.0 K and 2.0�6.50 MPa, respectively. THI results revealed that apart from TBAOH, all the considered AILs can shift HLVE curve towards higher pressure and lower temperature regions. Obtained results are further compared with commercial THI inhibitors. Average suppression temperature (Ŧ), Enthalpy of hydrate dissociation (�Hdiss) and Freezing point temperature (Tf) are also calculated for considered systems. The electrolyte based model is applied for validation of experimental HLVE data. Also, formation kinetics of studied AILs is reported for 1 wt aqueous AILs solutions at 6.50 MPa with different experimental temperatures (274.0 K and 277.0 K). Induction time, initial formation rate, Relative Inhibition Power (RIP) and total gas uptake are the reported parameters for kinetic study. Furthermore, kinetic results are compared with commercial kinetic inhibitor namely: polyvinyl pyrrolidinium (PVP) at 274.0 K condition. Kinetic data suggested that all the studied AILs can perform as KHI inhibitors. Therefore, the considered AILs (except TBAOH) are able to perform as dual-functional inhibitors which highlight the use of AILs as a potential dual-functional gas hydrate inhibitors for sustainable flow in gas transmission pipelines. © 2018 Elsevier B.V. 2019 Article PeerReviewed Khan, M.S. and Lal, B. and Shariff, A.M. and Mukhtar, H. (2019) Ammonium hydroxide ILs as dual-functional gas hydrate inhibitors for binary mixed gas (carbon dioxide and methane) hydrates. Journal of Molecular Liquids, 274. pp. 33-44. https://www.scopus.com/inward/record.uri?eid=2-s2.0-85055154866&doi=10.1016%2fj.molliq.2018.10.076&partnerID=40&md5=35c3071ef15c41ab12ba265bf7b9f7c0
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
description In this study the dual-functionality of four ammonium based Ionic Liquids (AILs) having hydroxide anion namely: tetramethyl ammonium hydroxide (TMAOH), tetraethyl ammonium hydroxide (TEAOH), tetrapropyl ammonium hydroxide (TPrAOH) and, tetrabutyl ammonium hydroxide (TBAOH) is investigated on binary mixed gas hydrates (50 mol-50 mol CO2-CH4). For thermodynamic behaviour, the hydrate liquid vapour equilibrium (HLVE) data are generated in the presence of 10 wt AILs solutions by the T-Cycle method at temperature and pressure conditions of 275.0�284.0 K and 2.0�6.50 MPa, respectively. THI results revealed that apart from TBAOH, all the considered AILs can shift HLVE curve towards higher pressure and lower temperature regions. Obtained results are further compared with commercial THI inhibitors. Average suppression temperature (Ŧ), Enthalpy of hydrate dissociation (�Hdiss) and Freezing point temperature (Tf) are also calculated for considered systems. The electrolyte based model is applied for validation of experimental HLVE data. Also, formation kinetics of studied AILs is reported for 1 wt aqueous AILs solutions at 6.50 MPa with different experimental temperatures (274.0 K and 277.0 K). Induction time, initial formation rate, Relative Inhibition Power (RIP) and total gas uptake are the reported parameters for kinetic study. Furthermore, kinetic results are compared with commercial kinetic inhibitor namely: polyvinyl pyrrolidinium (PVP) at 274.0 K condition. Kinetic data suggested that all the studied AILs can perform as KHI inhibitors. Therefore, the considered AILs (except TBAOH) are able to perform as dual-functional inhibitors which highlight the use of AILs as a potential dual-functional gas hydrate inhibitors for sustainable flow in gas transmission pipelines. © 2018 Elsevier B.V.
format Article
author Khan, M.S.
Lal, B.
Shariff, A.M.
Mukhtar, H.
spellingShingle Khan, M.S.
Lal, B.
Shariff, A.M.
Mukhtar, H.
Ammonium hydroxide ILs as dual-functional gas hydrate inhibitors for binary mixed gas (carbon dioxide and methane) hydrates
author_facet Khan, M.S.
Lal, B.
Shariff, A.M.
Mukhtar, H.
author_sort Khan, M.S.
title Ammonium hydroxide ILs as dual-functional gas hydrate inhibitors for binary mixed gas (carbon dioxide and methane) hydrates
title_short Ammonium hydroxide ILs as dual-functional gas hydrate inhibitors for binary mixed gas (carbon dioxide and methane) hydrates
title_full Ammonium hydroxide ILs as dual-functional gas hydrate inhibitors for binary mixed gas (carbon dioxide and methane) hydrates
title_fullStr Ammonium hydroxide ILs as dual-functional gas hydrate inhibitors for binary mixed gas (carbon dioxide and methane) hydrates
title_full_unstemmed Ammonium hydroxide ILs as dual-functional gas hydrate inhibitors for binary mixed gas (carbon dioxide and methane) hydrates
title_sort ammonium hydroxide ils as dual-functional gas hydrate inhibitors for binary mixed gas (carbon dioxide and methane) hydrates
publishDate 2019
url http://scholars.utp.edu.my/id/eprint/22182/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85055154866&doi=10.1016%2fj.molliq.2018.10.076&partnerID=40&md5=35c3071ef15c41ab12ba265bf7b9f7c0
_version_ 1762964045317537792
score 13.222552

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