Investigation of the hydrogen spillover on zeolites by Fourier transform infrared microscopy

Reiner Salzer; U. Roland; S. Stolle

doi:10.1117/12.166688

31 January 1994 Investigation of the hydrogen spillover on zeolites by Fourier transform infrared microscopy

Reiner Salzer, U. Roland, S. Stolle

Proceedings Volume 2089, 9th International Conference on Fourier Transform Spectroscopy; (1994) https://doi.org/10.1117/12.166688
Event: Fourier Transform Spectroscopy: Ninth International Conference, 1993, Calgary, Canada

Abstract

The hydrogen spillover was investigated by FT-IR microscopy using two-component samples of Pt/NaY-HNaY zeolite. The evaluation of the intensities of the OH and OD stretching bands as a function of time lead to the conclusion that the diffusion as well as the H-D exchange of the hydroxyls are the rate determining steps in the spillover process. The H-D exchange occurred only in the presence of a platinum-containing component in the sample in contact with the platinum-free HNaY component. The exchange behavior could only be explained by deuterium spillover, i.e., the adsorption and activation of deuterium on the remote platinum catalyst, the transfer of the activated particles onto the zeolitic support, and the diffusion on the solid surface to the OH groups. All zeolitic OH groups are involved in the exchange process. The exchange kinetics indicate a storage capacity of the zeolite framework for activated spilt-over deuterium species.

Citation Download Citation

Reiner Salzer, U. Roland, and S. Stolle "Investigation of the hydrogen spillover on zeolites by Fourier transform infrared microscopy", Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); https://doi.org/10.1117/12.166688

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