Figure 10.
Adsorption of CH4 in MFI-type zeolite at 300 K: (a) dual-Langmuir–Freundlich isotherm fitted to grand-canonical MC simulation data and the two individual contributions of the sites, (b) enthalpy of adsorption from the (local-) energy slope method, showing the framework–adsorbate and adsorbate–adsorbate separately, (c) total enthalpy of adsorption and the individual contributions per site for the dual-Langmuir–Freundlich model using explicit simulation to obtain the temperature dependence of the model parameters, and (d) similar to (c) but showing the enthalpy, entropy, and Gibbs free energy as a function of loading.