High-Temperature Cracking of Pentene to Ethylene and Propylene over H-ZSM-5 Zeolites: Effect of Reaction Conditions and Mechanistic Insights

The effects of reaction conditions on the yield ethylene and propylene from pentene cracking were investigated in a fixed-bed reactor at 500–750 °C for weight hourly space velocity (WHSV) 15–83 h−1. total reached maximum (67.8 wt%) 700 57 In order to explore mechanism high temperatures, thermal/catalytic proportion model was established. It found that feed chemically adsorbed with acid sites cracked through catalytic above 88.4%, even 750 °C. Ethylene products mainly derived rather than thermal 650–750 addition, suitable network deduced estimated. results showed monomolecular increased 1% 500 95% selectivity temperatures due intensification reaction. After 20 times regeneration, acidity pore structure zeolite had hardly changed, conversion remained 80% 650