INVESTIGADORES
PIERELLA Liliana Beatriz
artículos
Título:
Alkaline niobates ANbO3 (A ¼ Li, Na, K) as heterogeneous catalysts for dipropyl sulfide oxidation
Autor/es:
CANDELARIA LEAL MARCHENA; CLARA SAUX; ROBINSON DINAMARCA; GINA PECCHI; LILIANA PIERELLA
Revista:
RSC Advances
Editorial:
Royal Society of Chemistry
Referencias:
Año: 2016
ISSN:
2046-2069
Resumen:
Alkaline ANbO3 (A ¼ Li, Na, K) niobates with perovskite-type structure were prepared by a sol gel method,characterized by XRD, BET, TG/DTA, O2-TPD, DRS UV-Vis and FTIR and evaluated as heterogeneouscatalysts for the selective oxidation of dipropyl sulfide (DPS) to its corresponding sulfoxide. The effects ofdifferent reaction parameters were evaluated, such as catalyst weight, the solvent and oxidant nature,reaction temperature and reuse. In order to gain better knowledge of the oxidation process, a kinetic studyof the reaction was carried out. The global pseudo first order constant, the initial reaction rate and theapparent activation energy were calculated, and simplified reaction steps are proposed. KNbO3 showed thehighest catalytic activity and sulfoxide selectivity with a periodic trend of KNbO3 > NaNbO3 LiNbO3.
