Xylene isomers in zeolite catalyst

Xylene isomers in zeolite catalyst

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Credit: CLIVE FREEMAN, THE ROYAL INSTITUTION/ SCIENCE PHOTO LIBRARY

Caption: Computer graphics space-filling representation of the m- (left) and p- (right) isomers of xylene in the zeolite catalyst ZSM-5. Zeolites are a group of materials, based on silicon, aluminium, phosphorus & oxygen, that have structures based on interconnecting cavities & channels which form an ideal environment for shape-selective catalysis. Industrial applications include the cracking of petroleum, isomerisation & hydrocarbon synthesis reactions. In this image, the proximity of methyl groups in m-xylene (left), prevent its free diffusion along ZSM-5's straight channel. In contrast p-xylene (left) is able to move freely.

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Keywords: artwork, catalysis, catalyst, catalytic, catalytic isomerisation, chemical, chemistry, isomerisation, molecular graphic, molecule, xylene, zeolite, zsm-5

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