Investigation of the adsorption behaviour of acetone at the surface of ice. A grand canonical Monte Carlo simulation study - Archive ouverte HAL
Article Dans Une Revue Physical Chemistry Chemical Physics Année : 2008

Investigation of the adsorption behaviour of acetone at the surface of ice. A grand canonical Monte Carlo simulation study

Résumé

The adsorption isotherm of acetone at the surface of Ih ice has been determined by a set of grand canonical Monte Carlo simulations at 200 K, by varying the chemical potential of acetone in the simulations. The obtained isotherm can be described by the Langmuir theory up to a certain relative pressure value (i.e., about 0.07); above which the isotherm increasingly deviates from the Langmuir form. This deviation mainly originates from the increasing importance of the lateral dipolar interactions. Further, above this pressure the adsorption sites are no longer equivalent: the adsorbed acetone molecules are aligned in three different ways. In one of these orientations the acetone molecule forms two, while in another one it forms one hydrogen bond with the surface waters, whereas in the third preferred orientation no hydrogen bonding occurs between the adsorbed molecule and the ice surface.
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Dates et versions

hal-00337030 , version 1 (27-08-2018)

Identifiants

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György Hantal, Pál Jedlovszky, Paul N.M. Hoang, Sylvain Picaud. Investigation of the adsorption behaviour of acetone at the surface of ice. A grand canonical Monte Carlo simulation study. Physical Chemistry Chemical Physics, 2008, 10 (42), pp.6369-6380. ⟨10.1039/B808466A⟩. ⟨hal-00337030⟩
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