Kinetic modeling and optimization of n-heptane catalytic isomerization using Box-Behnken experimental design

Abstract

Abstract The statistical analysis using response surface methodology approach was conducted for optimization of the kinetic conditions of the n-heptane isomerization reaction over Pt-HZSM-5/HMS catalysts. The conditions of the kinetic experiments were as H2 flow rate of 20-45 cc min−1, n-C7 flow rate of 2-4.5 cc h−1, the reaction temperatures in the range of 200-350 °C, and the weight percent of HZSM-5 of 10-40. The results show that the amounts of HZSM-5 into Pt-HMS structure helps the rate of n-heptane isomerization reaction. The surface and contour plots confirm that the reaction rates do not considerably change versus temperature and flow rates of n-heptane and H2. 0.24 mol g−1s−1 is the highest reaction rate obtained in the 4.5 cc h−1 n-heptane flow rate and 45 cc min−1 H2 flow rate. The modelling results show both power-law and Langmuir–Hinshelwood model are in agreement with the experimental data.