Deactivation of Ferrierite during the 1-butene skeletal isomerization

COMELLI, R.A.; FINELLI, Z.R.; FIGOLI, N.S.; QUERINI, C.A.

STUDIES IN SURFACE SCIENCE AND CATALYSIS

Año: 1997 vol. 111 p. 139 - 144

0167-2991

The influence of temperature, 1-butene partial pressure, weight hourly space velocity (WHSV), and pretreatment conditions over the activity, selectivity and stability of ferrierite during the 1-butene skeletal isomerization has been studied in order to understand the process of coke formation. Coke is characterized by temperature-programmed oxidation (TPO) and Fourier transform-infrared diffuse reflectance spectroscopy (DRIFTS). The catalytic behavior is strongly affected by intrinsic properties of the zeolite, showing a significant deactivation associated with coke formation. The operational conditions, such as temperature, 1-butene partial pressure and WHSV, play an important role in the amount of coke produced, being the temperature the most important factor affecting the amount of coke. These conditions also modify the nature of the coke. An important fraction of the coke burns at high temperature, well above 600°C