Zeolite layer on geopolymeric support

Reference Presenter Authors
06-168 Wlodzimierz Mozgawa Mozgawa, W.(Faculty of Materials Science and Ceramics, AGH University of Science and Technology); Król, M.(Faculty of Materials Science and Ceramics, AGH University of Science and Technology);

The aim of this work was to develop and optimize the method for geopolymeric materials preparation, which can be potentially used as membranes in gas or liquids separation processes. The used method involved hydrothermal growth of zeolite layers on geopolymeric support – the compatibility of spatial structure of supports with zeolite should encourage the formation of layers consistent with the supports (partial recrystallization of the support is also observed).

Geopolymeric support was obtained by alkali-activation of metakaolinite. It is possible to obtain supports with satisfactory useful properties: metakaolinite by reaction with NaOH solution at 80°C and 24 h solidifies into durable sample. Zeolite membranes were synthesized by crystallization of a zeolite layer during the hydrothermal treatment. For comparison, layers on other ceramic support media – corundum – were also prepared.

Among many research methods used to describe the structure of zeolites and zeolite-like materials, vibrational spectroscopy occupies one of the main places. In this work is demonstrated that the structure of obtained materials can be described on a basis of vibrational spectroscopy, and consequently it is possible to control parameters of the process of preparation as well as their quality.

Acknowledgments: This work was financially supported by the National Science Centre in Poland under grant no. 2015/17/B/ST8/01200.

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