High-Performance of Gas Hydrates in Confined Nanospace for Reversible CH4 /CO2 Storage.
The molecular exchange of CH4 for CO2 in gas hydrates grown in confined nanospace has been evaluated for the first time using activated carbons as a host structure. The nano-confinement effects taking place inside the carbon cavities and the exceptional physicochemical properties of the carbon structure allows us to accelerate the formation and decomposition process of the gas hydrates from the conventional timescale of hours/days in artificial bulk systems to minutes in confined nanospace. The CH4 /CO2 exchange process is fully reversible with high efficiency at practical temperature and pressure conditions. Furthermore, these activated carbons can be envisaged as promising materials for long-distance natural gas and CO2 transportation because of the combination of a high storage capacity, a high reversibility, and most important, with extremely fast kinetics for gas hydrate formation and release.
Laboratorio de Materiales Avanzados, Instituto Universitario de Materiales-, Departamento de Química Inorgánica, Universidad de Alicante, Ctra. San Vicente-Alicante s/n, 03690, San Vicente del Raspeig, Spain.
Mirian E
ME
Casco
Instituto de Tecnología Química, Universidad Politécnica de Valencia-CSIC, Avda. de los Naranjos s/n, 46022, Valencia, Spain.
José L
JL
Jordá
Instituto de Tecnología Química, Universidad Politécnica de Valencia-CSIC, Avda. de los Naranjos s/n, 46022, Valencia, Spain.
Fernando
F
Rey
ALBA Light Source, 08290, Cerdanyola del Vallés, Barcelona, Spain.
François
F
Fauth
Laboratorio de Materiales Avanzados, Instituto Universitario de Materiales-, Departamento de Química Inorgánica, Universidad de Alicante, Ctra. San Vicente-Alicante s/n, 03690, San Vicente del Raspeig, Spain.
Manuel
M
Martinez-Escandell
Laboratorio de Materiales Avanzados, Instituto Universitario de Materiales-, Departamento de Química Inorgánica, Universidad de Alicante, Ctra. San Vicente-Alicante s/n, 03690, San Vicente del Raspeig, Spain.
Francisco
F
Rodríguez-Reinoso
Laboratorio de Materiales Avanzados, Instituto Universitario de Materiales-, Departamento de Química Inorgánica, Universidad de Alicante, Ctra. San Vicente-Alicante s/n, 03690, San Vicente del Raspeig, Spain.
Enrique V
EV
Ramos-Fernández
Laboratorio de Materiales Avanzados, Instituto Universitario de Materiales-, Departamento de Química Inorgánica, Universidad de Alicante, Ctra. San Vicente-Alicante s/n, 03690, San Vicente del Raspeig, Spain. joaquin.silvestre@ua.es.
Joaquín
http://orcid.org/0000-0002-0303-0817
J
Silvestre-Albero
activated carbon; confinement effects; gas hydrates; synchrotron X-ray diffraction; thermodynamics