Adsorption of binary gas mixtures in the presence of ad-ad interactions is studied through grand canonical Monte Carlo simulation in the framework of the lattice-gas model. The disordered surface has been characterized by patches of shallow and deep sites, arranged in a chessboard-like topography. The adsorption process is monitored through partial and total isotherms, and differential heats of adsorption. Interesting behaviors have been observed depending on ad-ad interactions and energetic disorder.
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