Thermodynamics of hydrogen adsorption on the zeolite Ca-Y

Autor:	C. Otero Areán, M.R. Llop Carayol, G. Turnes Palomino
Rok vydání:	2008
Předmět:	Absorbance Hydrogen storage Adsorption Hydrogen chemistry Enthalpy chemistry.chemical_element Infrared spectroscopy Physical chemistry General Chemistry Zeolite Catalysis
Zdroj:	Catalysis Today. 138:249-252
ISSN:	0920-5861
DOI:	10.1016/j.cattod.2008.05.021
Popis:	Variable-temperature infrared spectroscopy was used for a thermodynamic study on hydrogen adsorption on the zeolite Ca-Y. Adsorption renders the H–H stretching mode infrared active, at 4078 cm −1 ; and simultaneous measurement of IR absorbance and hydrogen equilibrium pressure, over a range of temperature, allowed standard adsorption enthalpy and entropy to be determined. They resulted to be Δ H °= −15.0(±1.0) kJ mol −1 and Δ S ° = −127(±10) J mol −1 K −1 , respectively. These relatively high values of adsorption enthalpy and entropy are discussed in the broader context of corresponding data for other hydrogen adsorbents.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d396d6eba9e4ad23c30a19db0019c36a https://doi.org/10.1016/j.cattod.2008.05.021 Zobrazit plný text záznamu Full Text from ScienceDirect