New Strategies for Obtaining Inorganic-Organic Composite Catalysts for Selective Hydrogenation

NICOLÁS CARRARA; JUAN M. BADANO; CAROLINA BETTI; CECILIA R. LEDERHOS; MARIANA BUSTO; CARLOS VERA; MÓNICA E. QUIROGA

New Advances in Hydrogenation Processes - Fundamentals and Applications

Intech

Lugar: Rijeka; Año: 2017; p. 181 - 207

Pd/composites are catalysts in which the catalytically active metal phase is located in asmall layer on the support surface. The metal distribution obtained on these supportscorresponds to a structure commonly known as ?egg-shell?. This distribution is optimalfor reactions that have heat or mass transfer resistances. The small thickness of the metallayer is mainly attributed to the use of support pellets of mixed organic?inorganiccomposition, the special interaction between the hydrophobic?hydrophillic supportsurface and the metal species (Pd or Pt) present in the impregnating aqueous solution.Pd/composite catalysts are active and selective for the reactions of selective hydrogenationof styrene, 1-heptyne, 3-hexyne and 2,3-butanone, and enantioselective hydrogenationof ethyl pyruvate. These reactions are of interest in both academic and industrialaspects.