Powder Technology, Vol.327, 282-290, 2018
Development of high performance catalytic filter of V2O5-WO3TiO2 supported-SiC for NOx reduction
Fabrication of V2O5-WO3/TiO2 supported-SiC catalytic filters has been developed by using rotational coating method and discussed their NO conversion performances at different reaction temperature (150-380 degrees C). M3C catalytic filter (coated with the grinded catalyst solution of catalyst with particle size of 1.0 mu m) showed the 99.9% NO conversion with the N-x-slip concentration below 15 ppm with the optimal temperature range from 230-350 degrees C, which is very satisfactory with the value approaching to the case of powder catalyst. The concentration of the catalyst coating solution optimized to 10 wff, (M310) to achieve the better NO conversion >99.5%. An effect of ball milling on the catalytic coating solution has investigated to achieve the 99.9% NO conversion. The effect of varied V2O5 content on NO conversion has been studied. The activation temperature for >99% conversion of 700 ppm NO gas shifted towards the lower one with the increase of the V2O5 content of V2O5-WO3/TiO2 supported SiC filter. M3V3 (3 wt% V2O5) is the best catalyst composition showed 100% NO conversion with the reaction temperature window 280-320 degrees C with less N2O formation below 20 ppm. However, M3V6 (6 wt% V2O5) showed the lowest reaction temperature as 240 degrees C for >99% NO conversion. (C) 2017 Published by Elsevier B.V.