INCAPE   05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Desempenho de catalisadores trimetálicos Pt-Re-Ge/Al2O3 na reforma de n-octano
Autor/es:
LUCIENE S. CARVALHO; KARLA C. S. CONCEIÇÃO; VANINA A. MAZZIERI; MARIA DO CARMO RANGEL; CARLOS L. PIECK
Lugar:
Armação dos Búzios, Rio de Janeiro, Brasil
Reunión:
Congreso; 15º Congresso Brasileiro de Catálise. 5º Congresso de Catálise do Mercosul; 2009
Institución organizadora:
Armação dos Búzios, Rio de Janeiro, Brasil
Resumen:
The performance of Pt-Re-Ge/Al2O3 trimetallic catalysts used in naphtha reforming was studied. It was found that the addition order of metallic precursors during the preparation of the catalysts affected the performance and properties of these systems. The metal function activity and strength of acid sites were increased when Re was added before Ge. The strong interaction between Pt and Re made the metallic function more active for hydrogenolysis reaction and weakened the Pt-C bond by the electronic donor effect of Re, which decreased the deposition of coke on the catalyst, increasing its stability. Moreover, when Re was added before Ge, the sites of medium acidity became more suitable for isomers production, important for improving the quality of gasoline. On the other hand, when Ge was added first, the interaction of germanium oxide with the support decreased the strength of the acid sites. In this case, the catalysts obtained were more active in noctane reforming and more selective to aromatics. The most selective catalyst for the production of aromatics was Ge-Re- Pt/Al2O3, while the best performance to obtain isomers was Re-Ge-Pt/Al2O3. addition order of metallic precursors during the preparation of the catalysts affected the performance and properties of these systems. The metal function activity and strength of acid sites were increased when Re was added before Ge. The strong interaction between Pt and Re made the metallic function more active for hydrogenolysis reaction and weakened the Pt-C bond by the electronic donor effect of Re, which decreased the deposition of coke on the catalyst, increasing its stability. Moreover, when Re was added before Ge, the sites of medium acidity became more suitable for isomers production, important for improving the quality of gasoline. On the other hand, when Ge was added first, the interaction of germanium oxide with the support decreased the strength of the acid sites. In this case, the catalysts obtained were more active in noctane reforming and more selective to aromatics. The most selective catalyst for the production of aromatics was Ge-Re- Pt/Al2O3, while the best performance to obtain isomers was Re-Ge-Pt/Al2O3. addition order of metallic precursors during the preparation of the catalysts affected the performance and properties of these systems. The metal function activity and strength of acid sites were increased when Re was added before Ge. The strong interaction between Pt and Re made the metallic function more active for hydrogenolysis reaction and weakened the Pt-C bond by the electronic donor effect of Re, which decreased the deposition of coke on the catalyst, increasing its stability. Moreover, when Re was added before Ge, the sites of medium acidity became more suitable for isomers production, important for improving the quality of gasoline. On the other hand, when Ge was added first, the interaction of germanium oxide with the support decreased the strength of the acid sites. In this case, the catalysts obtained were more active in noctane reforming and more selective to aromatics. The most selective catalyst for the production of aromatics was Ge-Re- Pt/Al2O3, while the best performance to obtain isomers was Re-Ge-Pt/Al2O3. 2O3 trimetallic catalysts used in naphtha reforming was studied. It was found that the addition order of metallic precursors during the preparation of the catalysts affected the performance and properties of these systems. The metal function activity and strength of acid sites were increased when Re was added before Ge. The strong interaction between Pt and Re made the metallic function more active for hydrogenolysis reaction and weakened the Pt-C bond by the electronic donor effect of Re, which decreased the deposition of coke on the catalyst, increasing its stability. Moreover, when Re was added before Ge, the sites of medium acidity became more suitable for isomers production, important for improving the quality of gasoline. On the other hand, when Ge was added first, the interaction of germanium oxide with the support decreased the strength of the acid sites. In this case, the catalysts obtained were more active in noctane reforming and more selective to aromatics. The most selective catalyst for the production of aromatics was Ge-Re- Pt/Al2O3, while the best performance to obtain isomers was Re-Ge-Pt/Al2O3.2O3, while the best performance to obtain isomers was Re-Ge-Pt/Al2O3.