kinetic studies of propene oligomerization over hzsm-5 zeolites with different acidity

In the present study kinetic of propene oligomerization reaction over hzsm-5 zeolite was studied and kinetic parameters such as rate constant and activation energy were evaluated. initially a number of reaction were carried out over hzsm-5 zeolite with different si/al ratio (10-50) at atmospheric pressure, temperature in the range of 250-400 °c and ghsv=195-1170 h-1 and it was found that the highest quantity of c7+ hydrocarbons was obtained with hzsm-5 of si/al molar ratio=25. the zeolite with si/al ratio of 25 was then chosen for the kinetic study. the reaction rate was described by a power law kinetic model based on propene consumption. the reaction followed a first order type reaction and the activation energy obtained suggests that propene oligomerization was limited by mass transfer.