Selective hydrogenation of phenylacetylene to styrene on a Pd/TiO2 coating in a microreactor

E.V. Rebrov, A. Berenguer-Murcia, H.E. Skelton, B.F.G. Johnson, J.C. Schouten

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Samenvatting

The selective hydrogenation of phenylacetylene to styrene by hydrogen was studied in the 25-50 oC temperature range in a continuous flow microchannel of 250 µm i.d. with a Pd supported on mesoporous TiO2 catalyst. The inner wall of the microreactor was dip-coated with a prehydrolyzed titania precursor solution containing an EOxPOyEOx amphiphilic triblock copolymer (EO = ethylene oxide, PO = propylene oxide, x = 106, y = 70) and suspended palladium nanoparticles with an average diameter of 4 nm. Solvent was withdrawn from the channel at a rate of 1 cm/s yielding a 120 nm continuous titania layer with a cubic mesostructure after drying and calcination. The organic copolymer was removed by calcination at 300oC under a residual pressure of 15 mbar. The coating porosity was 0.4, resulting in overall coating mass of 1.32 mg with a 1 wt.% Pd content. The liquid flow was varied between 1 and 10 µL/min and the hydrogen flow between 250 and 550 µL/min (STP). This corresponds to superficial velocities of 0.034-0.34 cm/s and 8-18 cm/s for liquid and gas, respectively. The maximum selectivity to styrene of 95 % was observed at a phenylacetylene conversion of 88%. The reaction rate in terms of TOF was found to be up to 2 s-1.
Originele taal-2Engels
TitelProceedings of the 10th International Conference on Microreaction Technology (IMRET-10), April, 06-10 2008, New Orleans, La
Plaats van productieNew York, NY
UitgeverijAmerican Institute of Chemical Engineers (AIChE)
Pagina's83n-1/14
ISBN van geprinte versie978-0-8169-1023-6
StatusGepubliceerd - 2008
Evenement10th International Conference on Microreaction Technology, IMRET 2008 - Topical Conference at the 2008 AIChE Spring National Meeting - New Orleans, LA, Verenigde Staten van Amerika
Duur: 1 apr 20084 apr 2008
Congresnummer: 410

Congres

Congres10th International Conference on Microreaction Technology, IMRET 2008 - Topical Conference at the 2008 AIChE Spring National Meeting
Verkorte titelIMRET 2008
Land/RegioVerenigde Staten van Amerika
StadNew Orleans, LA
Periode1/04/084/04/08
AnderAIChE spring national meeting ; (New Orleans, La.) : 2008.04.06-10

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