After optimization of preparation methods and catalyst slurry recipes, the correlation among the solid content of slurries, catalyst loading and catalytic performance were researched. The results showed that the catalytic filter with 4.2%(?) catalyst loading was obtained by being immersed a practical cordierite ceramic filter into the 10% (?, TiO2) aqueous catalyst slurry under vacuum condition, followed by drying and calcination process. The slurry was composed of metatitanic acid, ammonium metavanadate and ammonium metatungstate with mass ratios of V2O5/TiO2=0.1 and WO3/TiO2=0.08. The resulting catalytic filter was evaluated for NH3-SCR reaction at filtration velocity of 1 cm/s and NH3/NO=1(?) at standard conditons. It exhibited that the NO conversion rate was beyond 90%, N2O escape is less than 25?10?6(?) and pressure drop was lower than 650 Pa at the temperature of 250?350℃. The catalytic filter also showed a excellent performance for resistance to steam and SO2 poisoning, which meets well the request of industrial application.
Yusheng ZHANG Changming LI Hong ZENG Chao YU Jian YU Yunquan YANG Guangwen XU Shiqiu GAO
. Preparation of V2O5-WO3-TiO2/Cordierite Based Catalytic Filter for Removal of NOx from Flue Gas[J]. The Chinese Journal of Process Engineering, 2017
, 17(6)
: 1249
-1256
.
DOI: 10.12034/j.issn.1009-606X.217172
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