Dehydrogenation-cracking synergistic pathway of n-pentane by core-shell MFI zeolite to produce light olefins

A core@shell MFI type zeolite supporting PtZn alloys catalyst was prepared by dry gel conversion method, which is used for catalytic cracking of n-pentane. The shell and core of catalyst is composed of nanosheet silicalite-1 and microporous ZSM-5, respectively. A proposed dehydrogenation-cracking pathway was demonstrated, which facilitate the generation of light olefins. At 600 degrees C with WHSV of 6.26 h-1, the yield of ethylene and propylene in the product attained up to 35.3 wt% and 33.4 wt%, respectively.

Automated summary

A core-shell PtZn catalyst was prepared for catalytic cracking of n-pentane, achieving high yields of ethylene and propylene. The catalyst consisted of nanosheet silicalite-1 and microporous ZSM-5, facilitating the generation of light olefins through a proposed dehydrogenation-cracking pathway.