| DOI | Trouver le DOI : https://doi.org/10.1002/anie.201403638 |
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| Auteur | Rechercher : McLaurin, Graham1; Rechercher : Shin, Kyuchul; Rechercher : Alavi, Saman2; Rechercher : Ripmeester, John A.3 |
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| Affiliation | - Conseil national de recherches du Canada. Bureaux de la haute direction
- Conseil national de recherches du Canada
- Conseil national de recherches du Canada. Technologies de sécurité et de rupture
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| Format | Texte, Article |
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| Sujet | Methanol; Molecular dynamics; Gas uptake; Methane hydrates; Powder X ray diffraction; Hydrates |
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| Résumé | Contrary to the thermodynamic inhibiting effect of methanol on methane hydrate formation from aqueous phases, hydrate forms quickly at high yield by exposing frozen water-methanol mixtures with methanol concentrations ranging from 0.6-10 wt% to methane gas at pressures from 125 bars at 253 K. Formation rates are some two orders of magnitude greater than those obtained for samples without methanol and conversion of ice is essentially complete. Ammonia has a similar catalytic effect when used in concentrations of 0.3-2.7 wt%. The structure I methane hydrate formed in this manner was characterized by powder X-ray diffraction and Raman spectroscopy. Steps in the possible mechanism of action of methanol were studied with molecular dynamics simulations of the Ih (0001) basal plane exposed to methanol and methane gas. Simulations show that methanol from a surface aqueous layer slowly migrates into the ice lattice. Methane gas is preferentially adsorbed into the aqueous methanol surface layer. Possible consequences of the catalytic methane hydrate formation on hydrate plug formation in gas pipelines, on large scale energy-efficient gas hydrate formation, and in planetary science are discussed. |
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| Date de publication | 2014-09-24 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 21272664 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 946fcd26-4c59-4998-b55d-0413c180e5d5 |
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| Enregistrement créé | 2014-12-03 |
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| Enregistrement modifié | 2020-04-22 |
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