Influencia del Re, Sn y Ge sobre las propiedades catalítica de Pt/Al2O3 usado en el reformado de naftas

VANINA A. MAZZIERI; JAVIER M. GRAU; JUAN C. YORI; CARLOS VERA; CARLOS PIECK

Porto de Galinhas, Pernambuco, Brasil

Congreso; 14º Congresso Brasileiro de Catálise; 2007

Sociedad Brasileira de Catálise

Alumina supported bimetallic Pt-Re, Pt-Sn and Pt-Ge naphtha reforming catalysts were studied. The experimental results showed that the addition of a second metal (Re, Sn, Ge) to the Pt catalyst produced a modification of the metal and acid functions. Sn and Ge produce a marked decrease of the dehydrogenation and hydrogenolytic capacity of Pt. The addition of Re modifies the dehydrogenation capacity to a lesser extent than the addition of Sn or Ge. The hydrogenolytic capacity is increased upon Re addition. The changes on the acid function are different depending on which metal is added. Re and Ge modify the acid strength distribution; they favor the formation of sites of lower acid strength but they keep the total concentration of acid sites almost constant. Conversely Sn addition not only produces a change in the acid strength distribution but also a decrease of the total acidity of the catalyst.