Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9610408 | Catalysis Today | 2005 | 8 Pages |
Abstract
The selectivity of partial hydrogenation reactions of unsaturated substrates was studied in a membrane reactor operating at 323Â K and 40Â bar hydrogen pressure. The reactor system was constructed as a loop of a saturation vessel and a membrane module in which the reaction mixture was resaturated with hydrogen up to 100 times. In a porous membrane made from cross-linked polyacrylic acid palladium nanoparticles were incorporated as catalysts. A well-defined residence time within the membrane was achieved due to a defined pore structure of the membrane and a convective mass flow of the reaction mixture through the membrane. The selectivity for the partially hydrogenated products was investigated as a function of the pore size of the PAA membrane and was compared to commercially available catalysts. Compared to experiments with supported catalysts (Pd/C and Pd/Al2O3) in a slurry and a fixed bed reactor the selectivity for the desired products could be increased by 3% (1-octyne) up to 40% (geraniol).
Keywords
1-OctynePhaCCOAFBRPAACyclooctene1,5-CyclooctadieneSelectivityConversionreaction rate constantGeraniolMinweight percentminuteTemperatureFixed bed reactorMembrane reactorSlurry reactorCatalytic membrane reactorHourCyclooctaneInitial concentrationPressurePhenylacetyleneNanoparticlesflow rateCoewt.%Polyacrylic AcidCod
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Andrea Schmidt, Rami Haidar, Reinhard Schomäcker,