Clay honeycomb monoliths as support of manganese catalysts for VOCs oxidation

  1. J.M. Gatica 1
  2. J. Castiglioni 2
  3. C. de los Santos 2
  4. M.P. Yeste 1
  5. G.A. Cifredo 1
  6. M. Torres 2
  7. H. Vidal 1
  1. 1 Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Universidad de Cádiz, Puerto Real 11510, SPAIN.
  2. 2 LAFIDESU, DETEMA, Universidad de la República, Montevideo 11800, URUGUAY.
Actas:
4th International Renewable Energy and Environment Conference

ISSN: 2078-0737

Año de publicación: 2015

Volumen: 6

Páginas: 230-235

Tipo: Aportación congreso

GOOGLE SCHOLAR

Resumen

Integral honeycomb monoliths were prepared from a Spanish clay by extrusion without using additives. The resulting monoliths were employed as support of manganese catalysts deposited by impregnation method. The supported catalysts were characterized by means of different techniques such as chemical analysis, nitrogen physisorption, scanning electron microscopy, X-ray diffraction and Temperature-Programmed Reduction. Additionally, they were tested in the oxidation of both propane and acetone. The results obtained demonstrate that the active phase present (3 wt.%), being highly and homogeneously dispersed onto the surface of the clay support and consisting of MnO2, exhibits high efficiency to oxidize the two model volatile organic compounds (VOCs) investigated. In particular, light-off temperatures as low as 250 and 330 ºC were found for the oxidation of acetone and propane respectively, the catalytic activity being stable for 24 hours. This result combined with the advantages of the honeycomb monolithic design show the potential of the proposed formulation including clay as a more advantageous material in comparison to high-tech cordierites for a real application of interest in the environmental protection field.