1 March 1992 In-situ investigation of activated zeolites by diffuse-reflectance FTIR spectroscopy
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Proceedings Volume 1575, 8th Intl Conf on Fourier Transform Spectroscopy; (1992) https://doi.org/10.1117/12.56286
Event: Eighth International Conference on Fourier Transform Spectroscopy, 1991, Lubeck-Travemunde, Germany
Abstract
A new sample stage with minimal thermal expansion was used to investigate the activation process of zeolites. The results were displayed quasi-continuously by mapping the reflectance changes across the investigated spectral range. Such contour plots provide a more detailed insight into the sample behavior than individual difference spectra do. Long-term investigations were performed in the mid-infrared on glass-sealed activated samples. The solid state ion exchange between ZnO and H-ZSM-5 zeolite was studied at 450 degree(s)C. In erionites, the relation between the desorption of different ammonia species and the formation of OH groups during the activation has been studied up to 600 degree(s)C. The diffusion of water and the formation of hydroxonium ions was observed. In activated Y zeolite the intercrystalline diffusion of protons has been analyzed.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Reiner Salzer, "In-situ investigation of activated zeolites by diffuse-reflectance FTIR spectroscopy", Proc. SPIE 1575, 8th Intl Conf on Fourier Transform Spectroscopy, (1 March 1992); doi: 10.1117/12.56286; https://doi.org/10.1117/12.56286
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