2007
DOI: 10.1007/s10562-007-9056-2
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Deactivation of CeO2 catalyst in the hydrogenation of benzoic acid to benzaldehyde

Abstract: The CeO 2 catalyst has been investigated for hydrogenation of benzoic acid to benzaldehyde and shows little deactivation in stability test. BET results indicate that no significant sinter was observed on the used catalyst. SEM images show few changes taking place in surface feature of the used catalyst. Element analysis confirms that some coke is formed which leads to catalyst deactivation. XRD analysis reveals that crystalline size of catalyst is not relevant to the catalytic behavior in the range from 14.3 n… Show more

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Cited by 14 publications
(11 citation statements)
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“…After the reduction of catalysts, the ratio increases further, which results from the formation of hydroxyl groups on the catalyst surface in the reduction with hydrogen [16,17]. According to our previous work [14], the coke formation leads to the template deactivation of catalysts. The XPS results of used catalysts also confirm this conclusion.…”
Section: Resultsmentioning
confidence: 97%
See 2 more Smart Citations
“…After the reduction of catalysts, the ratio increases further, which results from the formation of hydroxyl groups on the catalyst surface in the reduction with hydrogen [16,17]. According to our previous work [14], the coke formation leads to the template deactivation of catalysts. The XPS results of used catalysts also confirm this conclusion.…”
Section: Resultsmentioning
confidence: 97%
“…The catalysts preparation was reported previously [14]. Briefly, CeO 2 catalyst was prepared by calcinating ammonium cerium nitrate (Sinopharm Chemical Reagent Co.) at 300°C for 2 h followed by 600°C for 4 h. The obtained sample is thus referred to Ce600.…”
Section: Catalyst Preparation and Catalytic Measurementsmentioning
confidence: 99%
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“…[129][130][131][132][133] The hydrogenation of benzoic acid over CeO 2 proceeds at up to 350 8C in gas phase; the selectivity to benzaldehyde was more than 95 % and the activity was controlled by the number of oxygen vacancies that are produced under the reaction conditions. The carboxylic acid deoxygenates with the help of an oxygen vacancy according to the Mars-Van Krevelen mechanism, forming an acylium ion that is hydrogenated to aldehydes.…”
Section: Hydrogenation Of Carboxylic Acids To Aldehydesmentioning
confidence: 99%
“…[130] However, ceria catalysts show little deactivation in stability test owing to coke formation and the valence changes of Ce over the catalyst. [132,133] To limit the use of CeO 2 , owing to its high cost, some authors have used mixed CeO 2 -Al 2 O 3 oxides for the hydrogenation of benzoic acid to benzaldehyde. To improve their performances, the simultaneous addition of Mn and K to theses oxides is necessary.…”
Section: Hydrogenation Of Carboxylic Acids To Aldehydesmentioning
confidence: 99%