Reaction Pathway of 1-Decene Cracking to Produce Light Olefins over H-ZSM-5 at Ultrahigh Temperature

Abstract

The effect of reaction temperature and weight hourly space velocity (WHSV) on the reaction of 1-decene cracking to ethylene and propylene over H-ZSM-5 zeolite was investigated. Also, the thermal cracking reaction of 1-decene was studied by cracking over quartz sand as blank. It was observed that 1-decene undergoes a significant thermal cracking reaction above 600 °C over quartz sand. In the range of 500−750 °C, the conversion remained above 99% for 1-decene cracking over H-ZSM-5, and the catalytic cracking dominated even at 750 °C. With the increase in temperature, the yields of ethylene and propylene gradually increased, and the yields of alkanes and aromatics also increased. The low WHSV was favorable for the yield of light olefins. With the increase of the WHSV, the yields of ethylene and propylene decrease. However, at low WHSV, secondary reactions were accelerated, and the yields of alkanes and aromatics increased significantly. In addition, the possible main and side reaction routes of the 1-decene cracking reaction were proposed based on product distribution.

Influence of temperatures and loadings on olefin diffusion in MFI-type zeolites in one- to three-dimensions

“…11,12 Zeolite catalysts are vital for numerous of these catalytic conversion processes. [13][14][15][16][17][18] The ongoing quest for adaptability adjustments to zeolite topological structures remains a longterm goal for fine-tuning the performance of these technologies. 19 The three-dimensional (3D) zeolite structure is a network consisting of silicon-oxygen and aluminiumoxygen tetrahedra.…”