The process of water intrusion in zeosils is the initial step for further probing electrolyte intrusion in these materials. We use the final configuration of zeosil-water system at 200 MPa for chabazite and faujasite where 13.25 and 211 water molecules are adsorbed per cell, respectively, while for silicalite-1, the final system containing 53 water molecules per cell at 400 MPa is considered. We also investigate electrolyte intrusion at other water loadings. For proof-of-concept, we do not perform GCMC simulations for these cases but relax systems of It is required to calibrate the chemical potential ∆µ CnAm (P ) as performed in our former work for a wide range of pressure to assess electrolyte intrusion at 200 MPa in chabazite and faujasite and at 400 MPa in silicalite-1. These calculations are computationally expensive so that we investigated only two representative monovalent electrolytes which are LiCl and CsCl since Li + is the smallest cation (σ Li + = 1.505 Å) while Cs + is the largest one (σ Cs + = 3.883 Å) among the alkali-chloride electrolytes. For similar reason, we chose two divalent electrolytes which are MgCl 2 and SrCl 2 . The evolution of ∆µ CnAm (P ) is reported in Figure .