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- W1998731657 abstract "Abstract The experiments for diphenylamine (DPA) synthesis over HCl-Al 2 O 3 carried out combining a FID gas chromatography and a temperature programmed desorption (TPD) technique which was adopted by Amenomiya and Cvetanovic. The desorption components from the catalyst surface are plotted against the desorption temperature which was raised linearly with time. The curves thus obtained are expediently called “TPD analytical curves.” From the curves, it was found that two different kinds of the sites for DPA formation were present on the Al 2 O 3 and HCl-Al 2 O 3 catalysts; one was found to be active in the range of 100–300 °C, and the other was active at above 400 °C. While the former was found unstable under the reaction conditions, the latter was stable and active under the same conditions. Therefore, it has been concluded that the latter is relevant to the active sites of the actual process. From the kinetic studies on the previous work and the present data, the reaction mechanism included a Rideal mechanism has been induced for the DPA synthesis over HCl-Al 2 O 3 catalyst." @default.
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- W1998731657 date "1973-04-01" @default.
- W1998731657 modified "2023-09-27" @default.
- W1998731657 title "The nature of adsorbed sites on catalysts I. Active sites and reaction mechanism for diphenylamine synthesis over HCl$z.sbnd;Al2O3 catalyst" @default.
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- W1998731657 doi "https://doi.org/10.1016/0021-9517(73)90203-0" @default.
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