Silicon based microreactors for catalytic reduction of nitrite contaminants in aqueous phase: use of carbon nanofiber supported palladium catalyst

Thakur, D.B. and Tiggelaar, R.M. and Gardeniers, J.G.E. and Lefferts, L. and Seshan, K. (2012) Silicon based microreactors for catalytic reduction of nitrite contaminants in aqueous phase: use of carbon nanofiber supported palladium catalyst. Chemical Engineering Journal . ISSN 1385-8947

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Abstract:	Carbon nanofiber layers containing palladium particles were synthesized inside the channels of a silicon based microreactor. Pd catalyst was prepared via dry impregnation using palladium acetylacetonate precursor solution in toluene. Several catalyst loadings were impregnated on five different CNF-layer thicknesses in the range 10–20 μm: for all loadings a relatively large average Pd particle size of ∼8 nm was obtained. The lateral and axial distribution of these metallic nanoparticles was uniform across the support for CNF-layer thicknesses up to 13 μm. For larger thicknesses, the presence of a dense carbonaceous layer underneath the open CNF-layer negatively affects the accessibility for Pd nanoparticles, resulting in a less good lateral distribution. External and internal mass transfer properties were evaluated, by carrying out hydrogenation of nitrite ions in aqueous phase. For sufficiently thin CNF-layers (⩽13 μm) hydrogenation was under kinetic control, indicating absence of mass transfer limitations and thus good accessibility and performance of the Pd containing CNF layers for reactant species
Item Type:	Article
Copyright:	© Elsevier
Faculty:	Science and Technology (TNW)
Research Group:	Catalytic Processes and Materials (CPM) Mesoscale Chemical Systems (MCS)
Link to this item:	http://purl.utwente.nl/publications/81090
Official URL:	http://dx.doi.org/10.1016/j.cej.2012.08.067
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