Zeolites are alumino-silicates that are micro-porous in nature. Zeolites have a honeycomblike structure, which makes them shape-selective catalysts. They have an extended 3Dnetwork of silicates in which some silicon atoms are replaced by aluminium atoms, giving them an Al−O−Si framework. The reactions taking place in zeolites are very sensitive to the pores and cavity size of the zeolites. Zeolites are commonly used in the petrochemical industry.
