Isomerization-cracking of N-octane on catalysts based on heteropolyacid H3PW12O40 and heteropolyacid supported on zirconia and promoted with Pt and Cs

DEBORA MANUALE; GERARDO TORRES; VIVIANA BENITEZ; JUAN M. BADANO; JUAN YORI; JORGE SEPÚLVEDA

QUíMICA NOVA

SOC BRASILEIRA QUIMICA

Lugar: San Pablo; Año: 2013 vol. 36 p. 960 - 966

0100-4042

Isomerization-cracking of n-octane was studied using H3PW12O40 (HPA) and HPA supported on zirconia and promoted with Pt and Cs. The addition of Pt and Cs to the supported HPA did not modify the Keggin structure. The Pt addition to the supported HPA did not substantially modify the total acidity; however, the Brönsted acidity increased significantly. Cs increased the total acidity and Brönsted acidity. A linear relation was observed between the n-C8 total conversion and Brönsted acidity. The most adequate catalysts for performing isomerization and cracking to yield high research octane number (RON) are those with higher values of Brönsted acidity.