Kinetic insight on CO2 hydrate formation and dissociation in quartz sand in presence of brine

•NaCl reduces CO2 hydrate formation and storage capacity.•Particle size, porosity, surface area, and pore size affect the CO2 storage capacity.•Quartz sand properties control the thermal stability of hydrates.•The maximum CO2 storage capacity achieved was over 50%.•Porosity-motivated capillary pressure controls CO2 hydrate formation mechanism.