The effect of reaction pressure on the catalytic performance of HZSM-5 for n-decane catalytic cracking
In this paper,microporous-mesoporous HZSM-5/MCM-41 composites with micro and nano-sized were prepared using HZSM-5 as raw material.The effects of the reaction pressure on the conversion and products selectivity in n-decane catalytic cracking reaction were investigated.It is found that when the system pressure is low,the density of the reaction fluid increases with the increase of the system pressure,promoting the aromatization of light olefins into aromatics and decreasing the selectivity of light olefins.When the pressure further increases,most of the cracking products are in a near critical or supercritical state,which reduces the aromatization degree of light olefins and increases light alkanes content.
fine chemical engineeringcatalytic crackingn-decanelight olefinsaromatic hydrocarbonssupercritical state