a four-lumped kinetic model to study propene oligomerization over HZSM-5 Zeolite

In this paper study kinetic of propene oligomerization reaction over HZSM-5 zeolite is studied and kinetic parameters such as rate constant and activation energy are evaluated. Initially, a number of reactions are carried out over HZSM-5 zeolite with different Si/Al ratios (10-50) at atmospheric pressure, with temperature in the range of 250 - 400 °C and GHSV = 195-1170 h"1; this leads to the conclusion that the highest quantity of C7+ hydrocarbons is obtained for HZSM-5 of Si/Al molar ratio = 25. The zeolite with Si/Al ratio of 25 is then chosen for the kinetic study. A four-lumped kinetic model based on reactant and the reaction products is used to describe the propene oligomerization. The kinetic parameters of this model are fully determined by using a non-linear regression on experimental data. Products yield predicted by this model is in agreement with experimental data.