THERMAL SCIENCE

International Scientific Journal

SIMULATION OF CH4 RECOVERY FROM HYDRATE DEPOSITS BY INJECTION OF CO2

ABSTRACT
The paper presents a mathematical model of CH4 recovery from gas hydrate deposits via injection of liquid CO2. The process of CH4 recovery is supposed to occur on the moving frontal boundary separating the deposit into two domains. The near domain is saturated with liquid CO2 and its hydrate while the far one is saturated with CH4 and its hydrate. Self-similar solutions describing the temperature and pressure fields were obtained. The effect of main parameters on the dynamics of the process under study was explored. It was revealed that at low temperatures of the CO2 being injected the temperature in the far domain did not exceed that of equilibrium for decomposition of CH4 gas hydrate. It was also found that with increasing pressure at which CO2 was injected into the gas hydrate do-main, the extension of the region saturated with CO2 hydrate was increasing.
KEYWORDS
PAPER SUBMITTED: 2018-08-22
PAPER REVISED: 2018-11-22
PAPER ACCEPTED: 2018-12-02
PUBLISHED ONLINE: 2019-05-05
DOI REFERENCE: https://doi.org/10.2298/TSCI19S2447B
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Supplement 2, PAGES [S447 - S454]
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© 2019 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence