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.
关键词
有机化学工程/催化裂解/正癸烷/低碳烯烃/芳烃/超临界状态
Key words
fine chemical engineering/catalytic cracking/n-decane/light olefins/aromatic hydrocarbons/supercritical state
维普
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