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Why zeolites are treated as shape select...

Why zeolites are treated as shape selective catalysts ?

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`to` The catalytic reaction that,depends upon the pore structure of the catalyst and the size of the reactant and product molecules is called shape selective catalysts.
`to`Zeolites are shape selective catalysts because of their honey comb-like structure. They are microporous alumino silicates with 3-dimensional net work of silicates.
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