✍ Scribed by Maria Ziółek; Zdzisław Dudzik
No coin nor oath required. For personal study only.
The influence of the basicity and acidity of faujasite-type zeolites on their catalytic activity in the H2S + 02 reaction was investigated. The catalytic activity increases with the increase in the zeolite basicity. Br6nsted-type acidity retarded the catalyst activity. Oxygen anions bound to aluminium cations in the zeolite framework play the role of catalytically active basic sites. In the sodium form series (Na-X, Na-Y, Na-Y deal.) the direct correlation between the number of alumina tetrahedra per unit celt and the catalytic activity was observed. The catalytic activity of faujasites modified with K +, Li +, and Ca 2+ cations was found to be inversely proportional to the electrostatic potential of the exchanging cation.
📜 SIMILAR VOLUMES
Cr-containing derivatives of PW, ,O& heteropolyanion (PW, ,Cr) were synthesized under variation of precursors and procedure (increasing temperature, prolonged keeping of solution, varying molar ratio of starting reagents and acidity) and characterized by elemental analysis, UV-Vis and IR spectroscop