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Hydrogen adsorption (physisorption) on the faujasite-type zeolite Mg–X was studied by means of variable-temperature (80–140K) FT-IR spectroscopy. Perturbation of the adsorbed H 2 molecules by the cationic adsorbing centres of the zeolite renders the H–H stretching mode IR active, at 4065cm −1 . Simultaneous measurement of IR absorbance and hydrogen equilibrium pressure, for a series...
Adsorption of carbon dioxide on a faujasite-type H-Y zeolite (Si:Al=2.6:1) was studied by variable-temperature (200–290K range) infrared spectroscopy. Adsorbed CO 2 molecules interact with the Brønsted acid Si(OH)Al groups located inside the zeolite supercage, bringing about a characteristic bathochromic shift of the O–H stretching mode from 3645cm −1 (free OH group) to 3540cm ...
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