Data/hora: 09/06/2024 07:37:48

Provedor de dados: | 5
País: | France
Título: | Experimental Study of Mixed Gas Hydrates from Gas Feed Containing CH4, CO2 and N2: Phase Equilibrium in the Presence of Excess Water and Gas Exchange
Autores: | Legoix, Ludovic; Ruffine, Livio; Deusner, Christian; Haeckel, Matthias.
Data: | 2018-08
Ano: | 2018
Palavras-chave: | Gas hydrates; CH4; CO2; N-2; High-pressure experiments; Phase equilibrium; Gas exchange.
Resumo: | This article presents gas hydrate experimental measurements for mixtures containing methane (CH 4 ), carbon dioxide (CO 2 ) and nitrogen (N 2 ) with the aim to better understand the impact of water (H 2 O) on the phase equilibrium. Some of these phase equilibrium experiments were carried out with a very high water-to-gas ratio that shifts the gas hydrate dissociation points to higher pressures. This is due to the significantly different solubilities of the different guest molecules in liquid H 2 O. A second experiment focused on CH 4 -CO 2 exchange between the hydrate and the vapor phases at moderate pressures. The results show a high retention of CO 2 in the gas hydrate phase with small pressure variations within the first hours. However, for our system containing 10.2 g of H 2 O full conversion of the CH 4 hydrate grains to CO 2 hydrate is estimated to require 40 days. This delay is attributed to the shrinking core effect, where initially an outer layer of CO 2 -rich hydrate is formed that effectively slows down the further gas exchange between the vapor phase and the inner core of the CH 4 -rich hydrate grain.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00452/56345/57935.pdf

DOI:10.3390/en11081984

https://archimer.ifremer.fr/doc/00452/56345/

Editor: | Mdpi
Formato: | application/pdf
Fonte: | Energies (1996-1073) (Mdpi), 2018-08 , Vol. 11 , N. 8 , P. 1984 (12p.)

Fonte:

2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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