Facile and fast determination of Si/Al ratio of zeolites using FTIR spectroscopy technique

A facile quantitative determination of the Si/Al ratio (SAR) in zeolite frameworks using IR spectroscopy is reported. From linear regression analysis, SAR for medium-to-high Al content zeolites (1 < 5) correlates linearly to corresponding intensity band at wavenumbers (950-1090 cm?1). This model has been validated with 19 different and framework topologies (EDI, ABW, EMT, MER, LTL, LTJ, MOR, FAU, SOD, HEU, BRE, OFF, GIS, *BEA, MFI). The by shown be an alternative technique conventional ICP-OES XRF techniques.