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Kinetic and Thermodynamic Influence of NaCl on Methane Hydrate in an Oil-Dominated System
[Image: see text] This experimental study reports the kinetic and thermodynamic inhibition influence of sodium chloride (NaCl) on methane (CH(4)) hydrate in an oil-dominated system. To thoroughly examine the inhibition effect of NaCl on CH(4) hydrate formation, kinetically by the induction time and...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2023
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10687932/ https://www.ncbi.nlm.nih.gov/pubmed/38046291 http://dx.doi.org/10.1021/acsomega.3c05866 |
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author | Almashwali, Abdulrab Abdulwahab Idress, Mazlin Lal, Bhajan Salem, Akram Jin, Quah Chong |
author_facet | Almashwali, Abdulrab Abdulwahab Idress, Mazlin Lal, Bhajan Salem, Akram Jin, Quah Chong |
author_sort | Almashwali, Abdulrab Abdulwahab |
collection | PubMed |
description | [Image: see text] This experimental study reports the kinetic and thermodynamic inhibition influence of sodium chloride (NaCl) on methane (CH(4)) hydrate in an oil-dominated system. To thoroughly examine the inhibition effect of NaCl on CH(4) hydrate formation, kinetically by the induction time and relative inhibition performance and thermodynamically by the hydrate liquid–vapor equilibrium (HL(w)VE) curve, enthalpy (ΔH(diss)) and suppression temperature are used to measure the NaCl inhibition performance through this experimental study. All kinetic experiments are performed at a concentration of 1 wt % under a pressure and temperature of 8 MPa and 274.15K, respectively, whereby for the thermodynamic study, the concentration was 3 wt % by using the isochoric T-cycle technique at the selected range of pressures and temperatures of 4.0–9.0 MPa and 276.5–286.0K, respectively; both studies were conducted using a high-pressure reactor cell. Results show that kinetically, NaCl offers slightly to no inhibition in both systems with/without oil; however, the presence of drilling oil contributes positively by increasing the induction time; thermodynamically, NaCl contributes significantly in shifting the equilibrium curve to higher pressures and lower temperatures in both systems. In the oil system, the contribution of the THI to the equilibrium curve increases the pressure with a range of 0.04–0.15 MPa and reduces the temperature with a range of 1–3 K, which is due to the NaCl presence in the systems that reduces the activity of water molecules by increasing the ionic strength of the solution. At a high pressure of 9 MPa, the NaCl inhibition performance was greater than that at lower pressures <5.5 MPa because, at the high pressure, NaCl increases the activity of water, which means that more water molecules are available to form hydrate cages around gas molecules. |
format | Online Article Text |
id | pubmed-10687932 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-106879322023-12-01 Kinetic and Thermodynamic Influence of NaCl on Methane Hydrate in an Oil-Dominated System Almashwali, Abdulrab Abdulwahab Idress, Mazlin Lal, Bhajan Salem, Akram Jin, Quah Chong ACS Omega [Image: see text] This experimental study reports the kinetic and thermodynamic inhibition influence of sodium chloride (NaCl) on methane (CH(4)) hydrate in an oil-dominated system. To thoroughly examine the inhibition effect of NaCl on CH(4) hydrate formation, kinetically by the induction time and relative inhibition performance and thermodynamically by the hydrate liquid–vapor equilibrium (HL(w)VE) curve, enthalpy (ΔH(diss)) and suppression temperature are used to measure the NaCl inhibition performance through this experimental study. All kinetic experiments are performed at a concentration of 1 wt % under a pressure and temperature of 8 MPa and 274.15K, respectively, whereby for the thermodynamic study, the concentration was 3 wt % by using the isochoric T-cycle technique at the selected range of pressures and temperatures of 4.0–9.0 MPa and 276.5–286.0K, respectively; both studies were conducted using a high-pressure reactor cell. Results show that kinetically, NaCl offers slightly to no inhibition in both systems with/without oil; however, the presence of drilling oil contributes positively by increasing the induction time; thermodynamically, NaCl contributes significantly in shifting the equilibrium curve to higher pressures and lower temperatures in both systems. In the oil system, the contribution of the THI to the equilibrium curve increases the pressure with a range of 0.04–0.15 MPa and reduces the temperature with a range of 1–3 K, which is due to the NaCl presence in the systems that reduces the activity of water molecules by increasing the ionic strength of the solution. At a high pressure of 9 MPa, the NaCl inhibition performance was greater than that at lower pressures <5.5 MPa because, at the high pressure, NaCl increases the activity of water, which means that more water molecules are available to form hydrate cages around gas molecules. American Chemical Society 2023-11-14 /pmc/articles/PMC10687932/ /pubmed/38046291 http://dx.doi.org/10.1021/acsomega.3c05866 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Almashwali, Abdulrab Abdulwahab Idress, Mazlin Lal, Bhajan Salem, Akram Jin, Quah Chong Kinetic and Thermodynamic Influence of NaCl on Methane Hydrate in an Oil-Dominated System |
title | Kinetic and Thermodynamic
Influence of NaCl on Methane
Hydrate in an Oil-Dominated System |
title_full | Kinetic and Thermodynamic
Influence of NaCl on Methane
Hydrate in an Oil-Dominated System |
title_fullStr | Kinetic and Thermodynamic
Influence of NaCl on Methane
Hydrate in an Oil-Dominated System |
title_full_unstemmed | Kinetic and Thermodynamic
Influence of NaCl on Methane
Hydrate in an Oil-Dominated System |
title_short | Kinetic and Thermodynamic
Influence of NaCl on Methane
Hydrate in an Oil-Dominated System |
title_sort | kinetic and thermodynamic
influence of nacl on methane
hydrate in an oil-dominated system |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10687932/ https://www.ncbi.nlm.nih.gov/pubmed/38046291 http://dx.doi.org/10.1021/acsomega.3c05866 |
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