Preparation of Multicomponent mixed oxides by Gel-supported precipitation and their application as catalytic materials for flue gas clean up

The synthesis of Al2O3 and TiO2-Al2O3 mixed oxides or Ti-Al-based multicomponent oxides by gel-supported pptn. (GSP) is described, and the effect of the prepn. method on the mech. strength and structural, physicochem., and reactivity characteristics of these oxides as supports or catalysts for NOx and SO2 removal from flue gases is discussed. The GSP method allows the prepn. of catalyst microspheres in a wide particle size range, with mech. strength and fluidizability characteristics suitable for applications in fluidized-bed, mobile bed, and trickle-bed reactors; the prepn. of well-dispersed, homogeneous multicomponent mixed oxides with high and controlled surface area and porosity, resistance to sintering, and controlled surface reactivity properties; and the prepn. of high-surface-area supports without surface contamination. [on SciFinder(R)] CAPLUS AN 1993:197108(Conference)