ANALYSIS OF THE PERFORMANCE OF PLATE-TYPE MONOLITHIC CATALYSTS FOR SELECTIVE CATALYTIC REDUCTION DENO(X) APPLICATIONS

An approach to the analysis of the plate-type catalysts for high-dust selective catalytic reduction (SCR) applications is herein presented. Commercial systems were studied in the form of slabs. NOx reduction an d SO2 oxidation runs were performed spanning a wide range of operating conditions. The results were analyzed on the basis of a 1D model. The estimates of the intrinsic activity parameters and of the effectivene ss factors were found to differ significantly among the catalysts unde r study. Aspects related to scale-up were also addressed on a prelimin ary basis. Concerning the SO2 oxidation reaction, the lab-scale analys is of the catalysts can be directly exploited for reactor design. On t he contrary, the evaluation of the DeNO(x) performance of the industri al plate-type monolith requires the study of the interphase mass trans fer in the real scale; the NO conversion data collected in the slab-re actor were estimated as not conservative in relation to design applica tions.