How do gas hydrates spread on a substrate?
International audience Growth of gas hydrates as fast-growing polycrystalline crusts at interfaces between water and guest phases is well documented, but the mechanisms of hydrate growth on solid substrates are much less known. We report here on cyclopentane (CP) hydrate spreading on glass (fused si...
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ftunivnantes:oai:HAL:hal-01498748v1 2023-05-15T17:12:06+02:00 How do gas hydrates spread on a substrate? de Banos, M.L.M. Hobeika, N. Bouriat, Patrick Broseta, Daniel Enciso, E. Clement, Franck Brown, Ross Laboratoire des Fluides Complexes et leurs Réservoirs (LFCR) TOTAL FINA ELF-Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS) Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM) Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) 2016 https://hal.archives-ouvertes.fr/hal-01498748 https://doi.org/10.1021/acs.cgd.6b00471 en eng HAL CCSD American Chemical Society info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.cgd.6b00471 hal-01498748 https://hal.archives-ouvertes.fr/hal-01498748 doi:10.1021/acs.cgd.6b00471 ISSN: 1528-7483 EISSN: 1528-7505 Crystal Growth & Design https://hal.archives-ouvertes.fr/hal-01498748 Crystal Growth & Design, American Chemical Society, 2016, 16 (8), pp.4360-4373. ⟨10.1021/acs.cgd.6b00471⟩ [CHIM]Chemical Sciences info:eu-repo/semantics/article Journal articles 2016 ftunivnantes https://doi.org/10.1021/acs.cgd.6b00471 2022-11-09T02:06:12Z International audience Growth of gas hydrates as fast-growing polycrystalline crusts at interfaces between water and guest phases is well documented, but the mechanisms of hydrate growth on solid substrates are much less known. We report here on cyclopentane (CP) hydrate spreading on glass (fused silica) under CP. As seen for methane hydrate by Beltrán and Servio (Cryst. Growth Des. 2010, 10, 4339-4347), CP hydrate grows on glass as a "halo" radiating from the contact line of a "primary" drop. Complementary optical microscopies at micron resolution here allow identification of the mechanisms of halo growth and melting. We conclude that forms of water on the substrate control halo spreading, namely, a precursor film near the contact line and a breath figure (dew) condensed from the CP (halo spreading at ≤2 μm s-1 at T 0 °C or subcooling ∼7 °C), and "leap-frogging" (at ∼10 μm s-1) over "secondary" drops left behind by melting a previous halo. Halo thickening, about 5 nm s-1, is attributed to water condensation, either incorporation of water dissolved in CP (like ablimation) or settling of water "fog" from the CP. Halos spread slower on untreated, compared to hydrophilic, glass, an effect attributed to the quantity of water present on the substrate; a similar trend is noted when the CP phase is not pre-equilibrated with water prior to the experiment. No hydrate halo was detected on hydrophobized (silane-treated) glass, where the breath figure is absent. Article in Journal/Newspaper Methane hydrate Université de Nantes: HAL-UNIV-NANTES Crystal Growth & Design 16 8 4360 4373 |
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Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
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English |
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[CHIM]Chemical Sciences |
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[CHIM]Chemical Sciences de Banos, M.L.M. Hobeika, N. Bouriat, Patrick Broseta, Daniel Enciso, E. Clement, Franck Brown, Ross How do gas hydrates spread on a substrate? |
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[CHIM]Chemical Sciences |
description |
International audience Growth of gas hydrates as fast-growing polycrystalline crusts at interfaces between water and guest phases is well documented, but the mechanisms of hydrate growth on solid substrates are much less known. We report here on cyclopentane (CP) hydrate spreading on glass (fused silica) under CP. As seen for methane hydrate by Beltrán and Servio (Cryst. Growth Des. 2010, 10, 4339-4347), CP hydrate grows on glass as a "halo" radiating from the contact line of a "primary" drop. Complementary optical microscopies at micron resolution here allow identification of the mechanisms of halo growth and melting. We conclude that forms of water on the substrate control halo spreading, namely, a precursor film near the contact line and a breath figure (dew) condensed from the CP (halo spreading at ≤2 μm s-1 at T 0 °C or subcooling ∼7 °C), and "leap-frogging" (at ∼10 μm s-1) over "secondary" drops left behind by melting a previous halo. Halo thickening, about 5 nm s-1, is attributed to water condensation, either incorporation of water dissolved in CP (like ablimation) or settling of water "fog" from the CP. Halos spread slower on untreated, compared to hydrophilic, glass, an effect attributed to the quantity of water present on the substrate; a similar trend is noted when the CP phase is not pre-equilibrated with water prior to the experiment. No hydrate halo was detected on hydrophobized (silane-treated) glass, where the breath figure is absent. |
author2 |
Laboratoire des Fluides Complexes et leurs Réservoirs (LFCR) TOTAL FINA ELF-Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS) Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM) Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
de Banos, M.L.M. Hobeika, N. Bouriat, Patrick Broseta, Daniel Enciso, E. Clement, Franck Brown, Ross |
author_facet |
de Banos, M.L.M. Hobeika, N. Bouriat, Patrick Broseta, Daniel Enciso, E. Clement, Franck Brown, Ross |
author_sort |
de Banos, M.L.M. |
title |
How do gas hydrates spread on a substrate? |
title_short |
How do gas hydrates spread on a substrate? |
title_full |
How do gas hydrates spread on a substrate? |
title_fullStr |
How do gas hydrates spread on a substrate? |
title_full_unstemmed |
How do gas hydrates spread on a substrate? |
title_sort |
how do gas hydrates spread on a substrate? |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.archives-ouvertes.fr/hal-01498748 https://doi.org/10.1021/acs.cgd.6b00471 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
ISSN: 1528-7483 EISSN: 1528-7505 Crystal Growth & Design https://hal.archives-ouvertes.fr/hal-01498748 Crystal Growth & Design, American Chemical Society, 2016, 16 (8), pp.4360-4373. ⟨10.1021/acs.cgd.6b00471⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.cgd.6b00471 hal-01498748 https://hal.archives-ouvertes.fr/hal-01498748 doi:10.1021/acs.cgd.6b00471 |
op_doi |
https://doi.org/10.1021/acs.cgd.6b00471 |
container_title |
Crystal Growth & Design |
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16 |
container_issue |
8 |
container_start_page |
4360 |
op_container_end_page |
4373 |
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