INCAPE   05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Efeito da adição de lantânio, praseodímio e samário na tiotolerância de catalisadores de platina suportada em zeólita KL
Autor/es:
L.P. GOMES; J.M. GRAU; J.L.G. FIERRO; M.C. RANGEL
Lugar:
Porto de Galinhas, Pernambuco, Brasil
Reunión:
Congreso; 14° Congresso Brasileiro de Catálise; 2007
Institución organizadora:
Sociedad Brasileira de Catálise
Resumen:
The KL zeolite-supported platinum catalysts are an attractive option for the dehydrociclization reaction. These catalysts possess low resistance against sulfur, even in low concentrations. The effect of lanthanum, praseodymium and samarium on the thiotolerance of Pt/KL catalyst was studied in order to find more efficient catalysts to produce ethylbenzene and o-xylene from naphtha reforming. It was found that the metals did not affect significantly the activity and the selectivity to ethylbenzene and o-xylene. However, samarium and praseodymium greatly increased the catalyst stability and also the thiotolerance, due to an interaction between platinum aggregates and the promoters. The samarium and praseodymium-promoted samples were the most promising ones, since they were the most thiotolerant catalysts.