what is ZSM-5 ?

Dear Abhay

ZSM-5 - Zeolite Socony Mobil – 5, (structure type MFI – mordenite framework inverted) is an aluminosilicate zeolite mineral belonging to the pentasil family of zeolites. Itschemical formula is Na_nAl_nSi_96–nO₁₉₂·16H₂O (0<n<27). Patented by Mobil Oil Company in 1975, it is widely used in the petroleum industry as a heterogeneous catalyst forhydrocarbon isomerization reactions.

Synthesis

ZSM-5 is a synthetic zeolite, closely related to ZSM-11. There are many ways to synthesize ZSM-5, a common method is as follows:^[6]

SiO₂ + NaAlO₂ + NaOH + N(CH₂CH₂CH₃)₄Br + H₂O → ZSM-5 + analcime + alpha-quartz

ZSM-5 is typically prepared at high temperature and high pressure in a Teflon-coated autoclave and can be prepared using varying ratios of SiO₂ and Al containing compounds.

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