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A pore‐flow‐through membrane reactor for partial hydrogenation of 1,5‐cyclooctadiene
Author(s) -
Schmidt A.,
Wolf A.,
Warsitz R.,
Dittmeyer R.,
Urbanczyk D.,
Voigt I.,
Fischer G.,
Schomäcker R.
Publication year - 2008
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.11379
Subject(s) - membrane reactor , selectivity , membrane , chemistry , catalysis , cyclooctene , chemical engineering , slurry , cyclooctadiene , volumetric flow rate , microreactor , mass transfer , plug flow reactor model , hydrogen , materials science , chromatography , continuous stirred tank reactor , organic chemistry , thermodynamics , composite material , engineering , biochemistry , physics
The partial hydrogenation of 1,5‐cyclooctadiene was performed in a pore‐flow‐through membrane reactor at 50°C and 1 MPa hydrogen pressure with single capillary membranes and a bundle of 27 capillaries for scale‐up studies. A preparation method for the catalytically active membranes and their characterization are described. Compared to millimeter‐sized spherical catalyst pellets in fixed‐bed or slurry reactors, mass transfer limitations could be successfully reduced in the membrane reactor. The conversion rate of 1,5‐cyclooctadiene in the membrane reactor was mainly affected by the Pd amount and the mass flow rate of the reaction mixture through the membrane. Under optimum conditions a selectivity of 95% for cyclooctene at complete conversion of 1,5‐cyclooctadiene was obtained. This value corresponds to the selectivity obtained with a powder catalyst with a particle size of approx. 25 μm in a slurry reactor for which microkinetic control of the reaction is expected to result in the highest possible selectivity. © 2007 American Institute of Chemical Engineers AIChE J, 2008