Ceria thin film as palladium support for application in capillary microreactor was developed for the first time from freshly prepared cerium isopropoxide precursor using sol-gel approach. The thin film was characterized using powder XRD, FESEM, TEM, FTIR and Raman spectroscopy. Film thickness was measured to be approximately 200 nm from the capillary SEM. Mean particle size and dispersion of Pd nanoparticles was determined from the TEM images. The Pd/CeO2 immobilized capillary was tested for hydrogenation of phenylacetylene in a microreactor. Higher conversion and selectivity towards ethylbenzene were recorded at higher temperature, while selectivity towards styrene was favored at higher phenylacetylene concentration and hydrogen flow rate. Catalyst turn over frequency of 0.733 s-1 was obtained for 158 ppm phenylacetylene hydrogenation at 60 oC and 0.5 ml.min-1 hydrogen flow rate.

Design of ceria thin-film catalyst support for capillary microreactor application

251st National Meeting (2016)

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