Studies of physico-chemical properties of mixed adsorbent in the zeolite/SiO2 system

Author： Sternik D.   Staszczuk P.   Majdan M.   Gładysz-Płaska A.   Dąbrowska E.   Bigda K.  

Publisher： Springer Publishing Company

ISSN： 1388-6150

Source： Journal of Thermal Analysis and Calorimetry, Vol.86, Iss.1, 2006-09, pp. : 69-75

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Abstract

The paper presents physico-chemical properties of mixed adsorbents in the clinoptylolite (mordenite)/SiO2 system containing 30, 50, 80 mass% zeolite. Adsorption capacity towards polar (water, butanol) and non-polar (n-octane) substances as well as total surface heterogeneity (energetic and geometrical) were determined. Desorption energy distribution functions as well as fractal dimensions were also determined and compared with the low-temperature nitrogen adsorption data. Irregular shapes of the curves q=f(E d) as well as large values of volumetric fractal dimensions (D f~2.6) revealed heterogeneous properties of the zeolite/SiO2 system surfaces. Addition of zeolite increases total heterogeneity of the material.

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