What is meant by ‘shape selective catalysis’?

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Nazia Khanum

Shape-selective catalysis refers to a type of catalysis in which the structure of the catalyst selectively allows only certain reactant molecules to access the active sites, while excluding others based on their size and shape. This selectivity arises from the specific pore structure or cavities within...
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Shape-selective catalysis refers to a type of catalysis in which the structure of the catalyst selectively allows only certain reactant molecules to access the active sites, while excluding others based on their size and shape. This selectivity arises from the specific pore structure or cavities within the catalyst material, which can accommodate molecules of certain sizes and shapes while restricting the entry of larger or differently shaped molecules. In shape-selective catalysis, the catalyst acts as a molecular sieve, enabling the preferential conversion of certain reactants into desired products while minimizing side reactions or undesired products. This property is particularly valuable in catalytic processes where multiple reactants or products are involved, and where controlling selectivity is crucial for achieving high yields and desired reaction outcomes. Zeolites are a prominent example of shape-selective catalysts, known for their well-defined pore structures and ability to selectively catalyze reactions based on the size and shape of the molecules involved. These catalysts find applications in various industrial processes, including petrochemical refining, environmental remediation, and synthesis of fine chemicals. read less
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