Hydrogen Adsorption in Zeolite Studied with Sievert and Thermogravimetric Methods

Natural clinoptilolite (mixture from clinoptilolite, quartz and muscovite) is activated with palladium and tested for hydrogen adsorption capability at temperatures RT - 200°C. Thermogravimetric and volumetric methods showed that zeolite activated with palladium (1.25%wt) shows markedly high hydroge...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2012-01, Vol.38 (1), p.12060-6
Main Authors: Lesnicenoks, P, Sivars, A, Grinberga, L, Kleperis, J
Format: Article
Language:English
Subjects:
Activated
Adsorption
Argon
Hydrogen
Mica
Muscovite
Palladium
Quartz
Room temperature
Temperature
Zeolites
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Summary:Natural clinoptilolite (mixture from clinoptilolite, quartz and muscovite) is activated with palladium and tested for hydrogen adsorption capability at temperatures RT - 200°C. Thermogravimetric and volumetric methods showed that zeolite activated with palladium (1.25%wt) shows markedly high hydrogen adsorption capacity - up to 3 wt%. Lower amount of adsorbed hydrogen (~1.5 wt%) was found for raw zeolite and activated with higher amount of palladium sample. Hypothesis is proposed that the heating of zeolite in argon atmosphere forms and activates the pore structure in zeolite material, where hydrogen encapsulation (trapping) is believed to occur when cooling down to room temperature. An effect of catalyst (Pd) on hydrogen sorption capability is explained by spillover phenomena were less-porous fractions of natural clinoptilolite sample (quartz and muscovite) are involved.
ISSN:1757-899X
1757-8981
1757-899X
DOI:10.1088/1757-899X/38/1/012060