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- W2349534236 abstract "The change of crystal phases of Cr3+-modified ZrO2 catalysts under different calcination temperatureand the effect of the different catalysts with monoclinic and tetragonal structures on the hydrogenation ofbenzoic acid to benzaldehyde are studied. m-ZrO2 is easily prepared under 600℃, which is the major factor ofselectivity of benzaldehyde. Moreover, the catalytic reaction is also studied with catalysts of Cr3+-modified ZrO2prepared in 25% concentrated ammonia water adjusting the different concentration of solution and the differentmolar ratio of Cr3+ and Zr4+. Every reaction time is half an hour. The best one of these catalysts is selected.Theresults of the reaction with the selected catalyst show that the activity of the catalyst decreases when the time ofusing catalyst increases ,but their selectivity is about 95%.The deactivited catalysts can be reactivated undercalcination, during which the activity is higher and after which the selectivity remains about 90%." @default.
- W2349534236 created "2016-06-24" @default.
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- W2349534236 date "2003-01-01" @default.
- W2349534236 modified "2023-09-26" @default.
- W2349534236 title "Hydrogenation of Benzoic Acid to Benzaldehyde over Cr~(3+)-modified ZrO_2" @default.
- W2349534236 hasPublicationYear "2003" @default.
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