Promotional Effect on Selective Catalytic Reduction of NO_x with NH₃ over Overloaded W and Ce on V₂O₅/TiO₂ Catalysts

Table 1

conversion at 200°C and N₂O concentration at 400°C obtained on all the samples we tested in this study.

Sample	conversion (%) at 200°C	N2O concentration (ppm) at 400°C
1 wt% V2O5/TiO2	10	15.4
3 wt% V2O5/TiO2	55	41.3
5 wt% V2O5/TiO2	67	42.1
W/VT (9 : 3)^(a)	67	36.2
Ce/VT (9 : 3)	63	10.8
W/Ce/VT (9 : 9 : 3)	58	14.4
Ce/W/VT (9 : 9 : 3)	51	13.2
W/VT (9 : 1)	34	6.9
Ce/VT (9 : 1)	41	5.6
W/Ce/VT (9 : 9 : 1)	36	5.0
Ce/W/VT (9 : 9 : 1)	33	5.2
W/VT (15 : 1)	28	6.7
Ce/VT (15 : 1)	44	3.7
W/Ce/VT (15 : 15 : 1)^(b)	68	4.2
Ce/W/VT (15 : 15 : 1)^(c)	55	3.7

(a), (b), and (c) were chosen as the promising catalysts.