Chemical Physics Letters, Vol.342, No.1-2, 148-154, 2001
Monte Carlo simulations of sorption and diffusion of isobutane in silicalite
We report kinetic Monte Carlo (KMC) and configurational-biased Monte Carlo (CBMC) simulations of isobutane adsorbed in zeolite silicalite. The CBMC simulations provide evidence for the presence of repulsive interactions between molecules adsorbed at adjacent intersection and straight-channel sites. KMC simulations show that even weak repulsive interactions have a strong influence on the diffusivities at higher loadings and therefore could serve as a possible explanation for the experimentally observed change of the apparent activation energy of self- and Maxwell-Stefan diffusion coefficients in this regime.