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- W2120818990 abstract "The relationship between the concentration of surface hydroxyl groups, acidic sites, and the turnover number (TON) for the isomerization of ortho-xylene over HZSM5 zeolite has been investigated. Results from the temperature-programmed desorption of NH3 from HZSM5 samples calcined at different temperatures reveal the existence of three types (weak, medium, and strong) of acid sites. A linear relationship (passing through the origin) was found between the TON and the concentration of the strong acid sites. Results from the adsorption of ortho-xylene on the same samples suggest that strong acid sites at channel intersections are the active sites for the isomerization reaction." @default.
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- W2120818990 date "1983-06-01" @default.
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- W2120818990 title "Active centres over HZSM5 zeolites *1I. Xylene isomerization" @default.
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- W2120818990 doi "https://doi.org/10.1016/0021-9517(83)90185-9" @default.
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