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Title: THE EFFECT OF USING A DIFFERENT POROUS MEDIUM FOR GAS HYDRATE PRODUCTION: A COMPARISON BETWEEN PURE QUARTZ SAND AND A NATURAL PRODUCT COMING FROM THE MEDITERRANEAN SEABED.
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THE EFFECT OF USING A DIFFERENT POROUS MEDIUM FOR GAS HYDRATE PRODUCTION: A COMPARISON BETWEEN PURE QUARTZ SAND AND A NATURAL PRODUCT COMING FROM THE MEDITERRANEAN SEABED.
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1314-2704
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English
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20
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1.3
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The gas hydrate formation is a non-stoichiometric process, which may be affected by a great number of variables, rather than thermodynamic conditions. Several chemical additives were found to act as inhibitors or promoters (or both together under specific situations) for gas hydrate. The most known chemical inhibitor is sodium chloride, whose effects needs to be widely investigated, due to its presence in about 97% of discovered hydrate reservoirs. However, other elements may intervene on the formation process and cause a delay or an acceleration of its occurrence. The present work focused on effect associated to the use of different porous medium to host gas hydrate formation. Gas hydrate are widespread in world oceans and are also present in the Mediterranean Sea. While thermodynamic conditions are often similar, seabed characteristics strongly vary among all reservoirs. The way in which a specific sand affects the hydrate formation might be extremely useful to forecast the feasibility of a CO2/CH4 exchange process into natural gas hydrate reservoirs. Here two different typologies of sand were tested: a classical quartz sand, which is often used for its neutrality as concerns the formation process and a silica-based sand containing several compounds known as potential inhibitors or promoters. This second product comes from the Tunisian costs (Mediterranean Sea) and its characteristics (composition, granulometry, porosity and so on) were not thought to favour hydrate formation. Two different guests were tested: methane and carbon dioxide. For both compounds three tests were made in quartz sand and three others in the other medium. Results in terms of hydrate formation and time duration of the process were finally compared.
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conference
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20th International Multidisciplinary Scientific GeoConference SGEM 2020, SCIENCE AND TECHNOLOGIES IN GEOLOGY, OIL AND GAS EXPLORATION, WATER RESOURCES, FOREST ECOSYSTEMS
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20th International Multidisciplinary Scientific GeoConference SGEM 2020, 8-11 December, 2020
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Proceedings Paper
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STEF92 Technology
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SGEM International Multidisciplinary Scientific GeoConference
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SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts & Letters; Acad Fine Arts Zagreb Croatia; C
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33-44
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8-11 December, 2020
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website
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cdrom
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7612
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gas hydrate formation;pure quartz sand;natural seafloor sand;CO2 CH4 replacement improvement
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