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What is meant by 'shape selective catalysis’?

What is meant by 'shape selective catalysis’?

Grade:

1 Answers

Aarti Gupta
askIITians Faculty 300 Points
7 years ago
Catalysis is a phenomenon in which a substance called the catalyst increases the rate of a reaction without being used in that reaction by lowering the free energy of activation of the raection.
Selectivity is one of the characteristics of catalyts which refers to the ability of catalyts to direct reaction to yield particular products.Nowdays most imporatnt oxide catalysts used are Zeolites.Their remarkable feature is shape-selectivity.Shape-selective catalysis depends on the pore size.The pore size in zeolites generally varies between 260pm to 740pm.Depending on the size of the cages or pores of the zeolite,reactions proceed in a specific manner.This is shape-selectivity.Zeolites are widely used in petrochemical industries for cracking of hydrocarbons and isomerization.

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