Kinetics and dynamics of heterogeneous hydroformylation Rh catalyst
- Univ. of Akron, OH (United States)
Heterogeneous CO/H{sub 2}/C{sub 2}H{sub 4} reaction of 4 wt% Rh/SiO{sub 2} catalyst was studied using steady-state pulse transient method coupled with in situ infrared spectroscopy. The dynamic responses measured at various partial pressures of reactants show that the CO/H{sub 2}/C{sub 2}H{sub 4} reaction can accurately be described by a Langmuir-Hinshelwood-Hougen-Watson (LHHW) model with the hydrogenation of adsorbed C{sub 2}H{sub 5}CO as the rate-determining step for propionaldehyde formation and the hydrogenation of adsorbed C{sub 2}H{sub 5} as the rate-determining step for ethane formation. The kinetic model also accurately describes the adsorption isotherm OF acyl intermediates measured by the pulse isotopic transient and adsorption isotherm of CO measured by IR spectroscopy. This study also demonstrates that the measurement of coverage of adsorbates by isotopic tracer pulsing and in situ infrared spectroscopy provides direct experimental evidence to confirm a postulated mechanism and rate law.
- OSTI ID:
- 433263
- Report Number(s):
- CONF-950402--
- Journal Information:
- Preprints of Papers, American Chemical Society, Division of Fuel Chemistry, Journal Name: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry Journal Issue: 1 Vol. 40; ISSN 0569-3772; ISSN ACFPAI
- Country of Publication:
- United States
- Language:
- English
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