Synthesis of a structured material based on compact spheres coated with Zn or Mg spinel

BOCANEGRA, SONIA A.; BALLARINI ADRIANA D.; SCELZA OSVALDO A.; DE MIGUEL, SERGIO

Procedia Materials Science

Elsevier

Lugar: ; Año: 2015 vol. 9 p. 69 - 78

In this work, a synthesis method of coating with thin layers of MgAl2O4 or ZnAl2O4 over alfa-Al2O3 spheres were developed.The method consisted in the deposition of a primer of bohemite on the spheres, followed by the impregnation with a solution ofMg or Zn nitrates, and further thermal treatments in order to obtain MAl2O4 (M: Mg or Zn). This method was modified toimprove the thickness and purity of the layer material. With this method, layers of uniform and adequate thickness and goodadhesion were achieved. Pt catalysts prepared with these materials as supports displayed good catalytic performances in the nbutanedehydrogenation reaction, especially those obtained with purified supports.