Calorimetric and IR-spectroscopic study of adsorption of methanol on zeolite-like aluminophosphates

Electrostatic properties of zeolite-like aluminophosphates are intermediate between those of zeolites and zeolite-like silica modifications. The adsorption measurements and IR spectroscopic investigations of the framework vibrations demonstrate that the number of the adsorption complexes of CH₃OH with Al atoms increases in the following order: AlPO₄-5 < AlPO₄-17 AlPO₄-18.The OH vibrations of methanol molecules in the first coordination sphere of the Al atoms are reflected in the IR spectra as an absorption band at 3200 cm^–1, which is not observed for the adsorption of CH₃OH on zeolites.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 1937–1942, October, 1995.