The Canadian Journal of Chemical Engineering · 1997 · 15 citations · 12 references
Natural SciencesChemical EngineeringChemistryChemical KineticsSurface ChemistrySurface ScienceChemical Reaction KineticsSurface AdsorptionSurface KineticsSurface PhysicsSurface Reaction KineticsSurface ReactionsAdsorption KineticsSurface CoverageSurface Hydrogenation ReactionsSurface IntermediatesSurface Reaction DynamicsSurface Reaction MechanismsSurface Turnover FrequencyTurnover Frequency
Abstract A method of estimating the lifetime of surface reaction intermediates by moment analysis of TAP reactor pulse response curves has been developed. The average surface lifetime of the adsorbed reaction intermediate in the hydrogenation of benzene to cyclohexane over Pt/SiO 2 at 140°C and 92 kPa of hydrogen is 38 ± 4 ms, as measured by a TAP pulse experiment. The steady‐state turnover frequency for this reaction under the same conditions is 1.0 ± 0.2 s −l . This implies that the surface coverage of Pt by benzene is low under the steady‐state conditions.
12