CATALYST DEACTIVATION DURING a-PINENE ISOMERIZATION REACTION. Fe-Mn-PROMOTED SULFATED ZIRCONIUM OXIDE

NORA COMELLI, LILIANA GRZONA, OMAR MASINI, ESTHER N. PONZI, MARTA I. PONZI

REACTION KINETICS AND CATALYSIS LETTERS

Lugar: Budapest; Año: 2000 vol. 71 p. 27 - 32

0133-1736

This works studies the deactivation of zirconium oxide, promoted by iron and manganese catalysts (SZFM), during the a-pinene isomerization. Experiments were done in liquid phase by using a batch reactor, and the solid crystalline structure was studied by XRD while the acidity by FTIR. The deactivated catalyst exhibited coke deposits and lost its Brönsted acidity, though it still kept its crystalline structure. The nature of the coke deposit formed was analysed by Infra red spectroscopy (FTIR) as well as by Temperature Programmed Oxidation (TPO). Regeneration was done in air flow were the temperature required to restore Brönsted acidity and to totally eliminate the coke deposits was of about 873 K.