Thermodynamic effect of ammonium based ionic liquids on CO2 hydrates phase boundary

In this experimental study, the phase boundary behavior of CO2 hydrate is reported in the presence of 1, 5, and 10 wt of three aqueous ammonium based ionic liquids (AILs) solutions. The T-cycle technique is used to measure the hydrate equilibrium conditions of AILs + CO2 + H2O hydrate systems within...

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Main Authors: Khan, M.S., Bavoh, C.B., Partoon, B., Lal, B., Bustam, M.A., Shariff, A.M.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.19447 /
Published: Elsevier B.V. 2017
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85019403644&doi=10.1016%2fj.molliq.2017.05.045&partnerID=40&md5=7757eca7f9735c08c00a253b68859840
http://eprints.utp.edu.my/19447/
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spelling utp-eprints.194472018-04-20T05:57:23Z Thermodynamic effect of ammonium based ionic liquids on CO2 hydrates phase boundary Khan, M.S. Bavoh, C.B. Partoon, B. Lal, B. Bustam, M.A. Shariff, A.M. In this experimental study, the phase boundary behavior of CO2 hydrate is reported in the presence of 1, 5, and 10 wt of three aqueous ammonium based ionic liquids (AILs) solutions. The T-cycle technique is used to measure the hydrate equilibrium conditions of AILs + CO2 + H2O hydrate systems within the ranges of 274–283 K and 1.80–4.20 MPa. All studied AILs inhibited CO2 hydrate with the inhibition effect increasing with AILs concentration. The 10 wt, TEAOH showed the highest inhibition effect with an average suppression temperature (∆ Ŧ) of 1.7 K, followed by TMACl (∆ Ŧ = 1.6 K) and then TPrAOH (∆ Ŧ = 1.2 K). Furthermore, COSMO-RS analysis is performed to understand the molecular level inhibition mechanism of AILs. In addition, the enthalpies of hydrate dissociation for all studied systems are also determined. The calculated hydrate dissociation enthalpies revealed that all the studied AILs show insignificant participation in CO2 hydrate cage formation at all concentrations, hence, do not form semi-clathrate hydrates. © 2017 Elsevier B.V. Elsevier B.V. 2017 Article PeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85019403644&doi=10.1016%2fj.molliq.2017.05.045&partnerID=40&md5=7757eca7f9735c08c00a253b68859840 Khan, M.S. and Bavoh, C.B. and Partoon, B. and Lal, B. and Bustam, M.A. and Shariff, A.M. (2017) Thermodynamic effect of ammonium based ionic liquids on CO2 hydrates phase boundary. Journal of Molecular Liquids, 238 . pp. 533-539. http://eprints.utp.edu.my/19447/
institution Universiti Teknologi Petronas
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description In this experimental study, the phase boundary behavior of CO2 hydrate is reported in the presence of 1, 5, and 10 wt of three aqueous ammonium based ionic liquids (AILs) solutions. The T-cycle technique is used to measure the hydrate equilibrium conditions of AILs + CO2 + H2O hydrate systems within the ranges of 274–283 K and 1.80–4.20 MPa. All studied AILs inhibited CO2 hydrate with the inhibition effect increasing with AILs concentration. The 10 wt, TEAOH showed the highest inhibition effect with an average suppression temperature (∆ Ŧ) of 1.7 K, followed by TMACl (∆ Ŧ = 1.6 K) and then TPrAOH (∆ Ŧ = 1.2 K). Furthermore, COSMO-RS analysis is performed to understand the molecular level inhibition mechanism of AILs. In addition, the enthalpies of hydrate dissociation for all studied systems are also determined. The calculated hydrate dissociation enthalpies revealed that all the studied AILs show insignificant participation in CO2 hydrate cage formation at all concentrations, hence, do not form semi-clathrate hydrates. © 2017 Elsevier B.V.
format Article
author Khan, M.S.
Bavoh, C.B.
Partoon, B.
Lal, B.
Bustam, M.A.
Shariff, A.M.
spellingShingle Khan, M.S.
Bavoh, C.B.
Partoon, B.
Lal, B.
Bustam, M.A.
Shariff, A.M.
Thermodynamic effect of ammonium based ionic liquids on CO2 hydrates phase boundary
author_sort Khan, M.S.
title Thermodynamic effect of ammonium based ionic liquids on CO2 hydrates phase boundary
title_short Thermodynamic effect of ammonium based ionic liquids on CO2 hydrates phase boundary
title_full Thermodynamic effect of ammonium based ionic liquids on CO2 hydrates phase boundary
title_fullStr Thermodynamic effect of ammonium based ionic liquids on CO2 hydrates phase boundary
title_full_unstemmed Thermodynamic effect of ammonium based ionic liquids on CO2 hydrates phase boundary
title_sort thermodynamic effect of ammonium based ionic liquids on co2 hydrates phase boundary
publisher Elsevier B.V.
publishDate 2017
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85019403644&doi=10.1016%2fj.molliq.2017.05.045&partnerID=40&md5=7757eca7f9735c08c00a253b68859840
http://eprints.utp.edu.my/19447/
_version_ 1741196208193404928
score 11.62408

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