“…Ion exchange for improvement of zeolite adsorption [35][36][37][38][39][40][41][42][43] and separation capability [37,[44][45][46][47] or for catalyst production [48,49]. The aim of the investigations is to determine how the ion exchange could change the total pore volume [37,41,49] and pore size so that the zeolite could then adsorb molecules with various kinetic diameters [40,41], i.e.…”