2007
DOI: 10.1007/s11144-007-5072-x
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A kinetic study of the liquid-phase hydrogenation of phenylpropanal over alumina-supported Ir catalysts

Abstract: Hydrogenation of phenylpropanal over Ir was investigated under mild conditions. An LH-kinetic model is presented that describes successfully experimental results specially the negative effects of temperature and initial concentrations.

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Cited by 1 publication
(3 citation statements)
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“…In these studies, satisfactory results were obtained only in models based on the Langmuir- Hinshelwood mechanism with hydrogen being adsorbed on sites different from those on which the organic molecules involved in the reaction (cinnamyl alcohol amongst others) do adsorb. This is, however, in contradiction to our results regarding the hydrogenation of cinnamyl alcohol (this study), phenylpropanal [5] and cinnammaldehyde [21] where competitive adsorption is observed to take place. Another discrepancy between our work and these studies is that the adsorption of cinnamyl alcohol was assumed to take place on a single adsorption site there while this study shows that upon adsorption cinnamyl alcohol requires two adsorption sites.…”
Section: Resultscontrasting
confidence: 99%
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“…In these studies, satisfactory results were obtained only in models based on the Langmuir- Hinshelwood mechanism with hydrogen being adsorbed on sites different from those on which the organic molecules involved in the reaction (cinnamyl alcohol amongst others) do adsorb. This is, however, in contradiction to our results regarding the hydrogenation of cinnamyl alcohol (this study), phenylpropanal [5] and cinnammaldehyde [21] where competitive adsorption is observed to take place. Another discrepancy between our work and these studies is that the adsorption of cinnamyl alcohol was assumed to take place on a single adsorption site there while this study shows that upon adsorption cinnamyl alcohol requires two adsorption sites.…”
Section: Resultscontrasting
confidence: 99%
“…This result agrees with a previous study of the hydrogenation of phenylpropanal (II) to phenylpropanol (IV) over Ir/Al 2 O 3 catalyst under similar reaction conditions [5]. Our investigation of cinnamaldehyde hydrogenation over Pd catalysts also led to the same conclusion [8].…”
Section: Resultssupporting
confidence: 93%
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