Question

Write a note on shape selective catalyst Zeolite.

Answer 1

Explanation:

A catalytic reaction which depends upon the pore structure of the catalyst and on the size of the reactant and the product molecules is called shape-selective catalysis. For example, catalysis by zeolites is a shape-selective catalysis. The pore size present in the zeolites ranges from 260-740 pm

Answer 2

What is Zeolites?

A shape-selective catalyst having Honeycomb structure which permit only selective molecules.

Formula: Mx/n [(AlO₂)x (SiO₂)y].zH₂O

Application of Zeolites:

1. Acts as water softener & selective absorbents.
2. Used as "ions-exchanger" in softening of hard water.
3. For cracking of Hydrocarbons & Isomerization.