Kinetic evaluation of the hydroformylation of the post-metathesis product 7-tetradecene using a heterobimetallic rhodium-ferrocenyl Schiff base derived precatalyst
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Reaction engineering kinetics for the hydroformylation of the post-metathesis product 7-tetradecene using a heterobimetallic rhodium-ferrocenyl Schiff base derived precatalyst was investigated with variation of reaction temperature (85–105 °C), precatalyst loading (0.25–0.52 mM), carbon monoxide partial pressures (20–40 bar) and hydrogen partial pressures (20–40 bar). The experimental product-time distributions for the parallel hydroformylation and isomerization reaction system are well described by four interdependent pseudo first-order differential mole balance equations. The effects of temperature in the Arrhenius equation, precatalyst concentration, carbon monoxide and hydrogen partial pressures have been incorporated into a phenomenological mechanism-based rate equation. The rate of hydroformylation is first order in alkene, carbon monoxide and hydrogen, with fractional dependence in precatalyst concentration. The activation energy for the hydroformylation reaction was calculated to be 62 kJ mol−1, which is comparable to that determined for the commercialized phosphorus-modified catalyst systems.
KeywordsHydroformylation Kinetics Heterobimetallic Rhodium Ferrocene Internal alkene
Sum of square errors
List of symbols
Concentration (mol L−1)
Activation energy (kJ mol−1)
Observed reaction rate constant (h−1)
Pre-exponential factor (Lx mol−x bar2 h−1/Lx mol−x h−1)
Equilibrium constant (bar−1)
Universal gas constant (J mol−1 K−1)
The support of the DST-NRF Centre of Excellence (CoE) in Catalysis towards this research is hereby acknowledged. Opinions expressed and conclusions arrived at, are those of the author and are not necessarily to be attributed to the CoE. The authors also wish to thank the University of Stellenbosch and University of Cape Town for additional financial support towards this research and Shepherd Siangwata for skilled guidance and assistance in preparing the precatalyst used for the study.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
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