Effects of mass transfer limitation on the reaction rate and induction period observed during 1-octene hydroformylation: An in situ infrared (IR) study

I&EC 155

Hong Jin, bsubramaniam@ku.edu, Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Center for Environmental Beneficially Catalysis, Lawrence, KS 66045 and Bala Subramaniam, bsubramaniam@ku.edu, Department of Chemical & Petroleum Engineering, University of Kansas, Center for Environmentally Beneficial Catalysis, 1501 Wakarusa Drive, Lawrence, KS 66047.
Recently we have demonstrated CO2-expanded liquids (CXLs) are promising media for catalytic hydroformylation. In reactions performed in batch-mode, turnover frequencies obtained in CXLs were several-fold higher than in organic solvents. Temporal concentration data are needed for extracting kinetic parameters in CXLs. Due to its multiphase nature, catalytic hydroformylation is affected by both mass transfer and solubility of the gaseous reactant, syngas (H2/CO) in the liquid phase. In the present work, hydroformylation of 1-octene was investigated under various mixing conditions with an in situ IR probe, placed at the bottom of a high-pressure autoclave reactor, to monitor concentrations of the reacting species. The use of in situ IR technique significantly simplified the collection and analysis of compressed liquid samples, and reduced the sample collection interval to the order of seconds. Effects of syngas mass transfer on the rate of 1-octene hydroformylation and an observed induction period will be discussed.
 

In Situ Spectroscopic Monitoring in Process Development and Production, Sponsored by Novel Chemistry with Industrial Applications Sub-Division
8:30 AM-12:00 PM, Wednesday, 13 September 2006 Moscone Center -- Room 252/254, Oral

Division of Industrial & Engineering Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006