PtSn/g-Al2O3 isobutane dehydrogenation catalysts: the effect of alkaline metals addition

GUILLERMO J. SIRI; GUILLERMO R. BERTOLINI; MÓNICA L. CASELLA; OSMAR A. FERRETTI

MATERIALS LETTERS

Elsevier

Lugar: Amsterdam; Año: 2005 vol. 59 p. 2319 - 2324

0167-577X

In this work, the modifying effect of alkaline metals (Li, Na and K) is studied on the acid properties of the support and on the behavior of PtSn/gamma-Al2O3 catalytic systems, in the isobutane dehydrogenation. The isopropyl alcohol transformation rate decreases sharply with the addition of alkaline metals, according to the sequence Li<Na<K. For the dehydrogenation reaction, the addition of K improves the stability level of the catalyst, and, as a result, PtSnK1.7 catalyst presents the best performance activity/selectivity/stability.