ZSM-5

Electron micrograph and structure of ZSM-5. Blue balls represent Si and red balls represent O.
The structure of ZSM-5 showing the coordination tetrahedra.

ZSM-5, Zeolite Socony Mobil–5 (framework type MFI from ZSM-5 (five)), is an aluminosilicate zeolite belonging to the pentasil family of zeolites. Its chemical formula is NanAlnSi96–nO192·16H2O (0<n<27). Patented by Mobil Oil Company in 1975,[1] it is widely used in the petroleum industry as a heterogeneous catalyst for hydrocarbon isomerization reactions.

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