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Berlin 2008 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 33: SYM Hydrogen in Materials: New Developments I

MM 33.2: Talk

Thursday, February 28, 2008, 10:45–11:05, H 1058

Isosteric heat of adsorption for hydrogen in microporous materials — •Barbara Schmitz1,2 and Michael Hirscher11Max-Planck-Institut für Metallforschung, Stuttgart, Germany — 2Universität Bonn, Germany

The adsorption of hydrogen in activated carbon and metal organic frameworks is measured with an automated Sieverts apparatus. The pressure dependent hydrogen uptake is investigated at several temperatures above 77K and pressures up to 20bar. The total uptake is correlated to the specific surface area. From the adsorption isotherms the isosteric heat of adsorption is evaluated within a wide range of surface coverage between 0.2 and 0.8. The results are related to the structure of the different materials.

Acknowledgment: Partial funding by the European Commission DG Research (contract SES6-2006-518271/ NESSHY) is gratefully acknowledged by the authors.

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