Pd/C catalysts doped with Fe, Sn and Ca for the selective hydrogenation of 2,4-dinitrotoluene (2,4-DNT) have been characterized by CO chemisorption, X-ray diffraction (XRD) and electron microscopy techniques (TEM-EDX). The promoters modify the microstructural and chemisorption properties of the noble metal particles with respect the undoped-Pd/C catalyst depending on the promoter nature and loading. Particles smaller than those observed on the monometallic catalysts were detected on Fe- and Sn-doped catalysts whereas larger particles were observed on the Ca-promoted samples. The promoters are located on the palladium particles, covering them and/or forming alloys with palladium. The role of the promoters in the selective hydrogenation of 2,4-DNT is discussed on the basis of the characterization results.

“Microstructural characterization of doped-Pd/C catalysts for the selective hydrogenation of 2,4-dinitrotoluene to arylhydroxylamines”

MUSOLINO, Maria Grazia
2003

Abstract

Pd/C catalysts doped with Fe, Sn and Ca for the selective hydrogenation of 2,4-dinitrotoluene (2,4-DNT) have been characterized by CO chemisorption, X-ray diffraction (XRD) and electron microscopy techniques (TEM-EDX). The promoters modify the microstructural and chemisorption properties of the noble metal particles with respect the undoped-Pd/C catalyst depending on the promoter nature and loading. Particles smaller than those observed on the monometallic catalysts were detected on Fe- and Sn-doped catalysts whereas larger particles were observed on the Ca-promoted samples. The promoters are located on the palladium particles, covering them and/or forming alloys with palladium. The role of the promoters in the selective hydrogenation of 2,4-DNT is discussed on the basis of the characterization results.
2,4-Dinitrotoluene; Arylhydroxylamines synthesis; Selective hydrogenation; TEM-EDX
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.12318/293
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