High–performance of gas hydrates confined in nanoporous solids for CH4 and CO2 storage
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2023-10-11 21:52
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CASCO, Mirian Elizabeth, CUADRADO-COLLADOS, Carlos, MARTÍNEZ-ESCANDELL, Manuel, SILVESTRE-ALBERO, Joaquin. High–performance of gas hydrates confined in nanoporous solids for CH4 and CO2 storage. In: Achievements and perspectives of modern chemistry, 9-11 octombrie 2019, Chişinău. Chisinau, Republic of Moldova: Tipografia Academiei de Ştiinţe a Moldovei, 2019, p. 25. ISBN 978-9975-62-428-2.
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Achievements and perspectives of modern chemistry 2019
Conferința "International Conference "Achievements and perspectives of modern chemistry""
Chişinău, Moldova, 9-11 octombrie 2019

High–performance of gas hydrates confined in nanoporous solids for CH4 and CO2 storage


Pag. 25-25

Casco Mirian Elizabeth, Cuadrado-Collados Carlos, Martínez-Escandell Manuel, Silvestre-Albero Joaquin
 
Universitario de Materiales, Universidad de Alicante
 
 
Disponibil în IBN: 31 octombrie 2019


Rezumat

The discovery of sediments deep under sea and in the permafrost containing methane molecules in the form of gas hydrate has opened a wide range of potential applications for energy storage. Gas hydrates are crystalline inclusion compounds that are formed when small guest molecules contact water in specific pressure and temperature conditions (below 10ºC, above 3.5 MPa) [1]. In the specific case of methane (the main component of natural gas), sI hydrates can store one molecule of methane for every six molecules of water, i.e. a maximum of 180 volumes (STP) per volume. Hence, artificial methane hydrates can be anticipated as a feasible alternative for storage and transportation of natural gas at much lower cost and safer than the current technologies, e.g. liquid natural gas and compressed natural gas. Despite the promising performance of gas hydrates, their nucleation and growth is an interfacial phenomena associated with very slow kinetics. However, recent studies from our research group have shown that activated carbons with a widely developed porous structure and a proper surface chemistry can be promote the nucleate and growth of gas hydrates (methane) under milder conditions than nature (2ºC and 4-6 MPa), with faster kinetics (within minutes) and with a stoichiometry that mimics natural hydrates [2]. Similar experiments using MOFs have shown that besides the porous structure, the surface chemistry (hydrophobic/hydrophilic character) is of paramount importance to define the water-framework interactions, and consequently, the water-to-hydrate yield [3].