Thermodynamics of binary gas adsorption in nanopores

Sujeet Dutta (1) , Ronan Lefort (1) , Denis Morineau (1) , Ramona Mhanna (1) , O. Merdrignac-Conanec (2) , Arnaud Saint-Jalmes (1) , T. Leclercq (1)

1 IPR - Institut de Physique de Rennes
2 ISCR - Institut des Sciences Chimiques de Rennes

MCM-41 nanoporous silicas show a very high selectivity for monoalcohols over aprotic molecules during adsorption of a binary mixture in the gas phase. We present here an original use of gravimetric vapour sorption isotherms to characterize the role played by the alcohol hydrogen-bonding network in the adsorption process. Beyond simple selectivity, vapour sorption isotherms measured for various compositions help to completely unravel at the molecular level the step by step adsorption mechanism of the binary system in the nanoporous solid, from the first monolayers to the complete liquid condensation. © 2016 the Owner Societies.

Domaines: Chimie; Physique [physics]

Sujeet Dutta, Ronan Lefort, Denis Morineau, Ramona Mhanna, O. Merdrignac-Conanec, et al.. Thermodynamics of binary gas adsorption in nanopores. Physical Chemistry Chemical Physics, 2016, 18 (35), pp.24361--24369. ⟨10.1039/c6cp01587e⟩. ⟨hal-01367211⟩