Abstract
Analogies were drawn between the properties of zeolites and of solutions, including the accessibility of atoms, cation and proton mobility, framework atom mobility, ionizing and electrolyte properties, formation of transition metal complexes, acidity, and activity coefficients in ion exchange. The properties of solutions, including properties connected with acidity (solvent, structure, and concentration effects), electrode potential, collective interactions, and solubility product, were extended to zeolites. The analysis shows that for dealuminated zeolites and oxyacids of the TO/sub n/(OH)m formula, the acid strength increases with increasing number of oxygens; that defining the activity coefficients for the ions and atoms of the zeolite framework might elucidate zeolite adsorption and catalytic activity; and that the behavior of transition metal cations in zeolites is related to electrode phenomena.
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