Chinese Journal of Catalysis ›› 2016, Vol. 37 ›› Issue (11): 1982-1990.DOI: 10.1016/S1872-2067(16)62531-7

• Article • Previous Articles     Next Articles

Oxidation of glycerol with H2O2 on Pb-promoted Pd/γ-Al2O3 catalysts

María L. Faroppaa, Juan J. Muscia, María E. Chiossoa.b, Claudia G. Caggianoa, Hernán P. Bideberripeb,c, José L. García Fierrod, Guillermo J. Sirib,c, Mónica L. Casellaa,b   

  1. a CIBA (CIT UNNOBA, CONICET), Universidad Nacional del Noroeste de la Provincia de Buenos Aires, Newbery 261 (6000) Junín, Provincia de Buenos Aires, Argentina;
    b CINDECA (CCT La Plata-CONICET, UNLP), Universidad Nacional de La Plata, Facultad de Ciencias Exactas, 47 N·257, 1900 La Plata, Argentina;
    c PIDCAT Facultad de Ingeniería, Universidad Nacional de La Plata, 1 y 47, 1900 La Plata, Argentina;
    d Instituto de Catálisis y Petroleoquímica, CSIC, Canto Blanco, E-28049 Madrid, España
  • Received:2016-06-01 Revised:2016-08-20 Online:2016-11-25 Published:2016-11-25
  • Contact: Mónica L. Casella,Tel:+542214210711; E-mail:casella@quimica.unlp.edu.ar
  • Supported by:

    This work was supported by CONICET (PIP 0276), UNLP (Projects X 700), UNNOBA (SIB 2924/14), and Ministry of Education and Sports (Call "Jorge Sábato" Project 44-144-415), Argentina.

Abstract:

A series of bimetallic Pd-Pb catalysts with a constant Pd content of 1 wt% and Pb/Pd atomic ratio from 0 to 1.6 supported on γ-Al2O3 were prepared and used for glycerol oxidation with H2O2 as the oxidizing agent at atmospheric pressure, 45℃ and pH=11. The morphology and dispersion of the catalysts were characterized by scanning electron microscopy-energy dispersive X-ray spectrosco-py (SEM-EDX) and transmission electron microscopy (TEM). The presence of an alloy phase in the bimetallic catalyst was detected by X-ray photoelectron spectroscopy (XPS). Glycerol conversion obtained with the monometallic Pd catalyst was 19%, which was increased to 100% with the addi-tion of Pb. The four bimetallic PdPb catalysts were able to oxidize glycerol to dihydroxyacetone (DIHA) and the selectivity to DIHA reached 59%, 58%, 34% and 25% for PdPb0.25, PdPb0.50, PdPb1.00 and PdPb1.60 catalysts, respectively.

Key words: Palladium, Bimetallic palladium-lead catalyst, Hydrogen peroxide, Glycerol oxidation, Glyceric acid, Glycolic acid