载体预处理对蜂窝状V2O5/ACH低温脱硫脱硝活性的影响

V2O5/activated carbon honeycomb (ACH) catalysts were prepared by impregnation of pretreated ACH with an aqueous solution of ammonium metavanadate (NH4VO3) in oxalic acid. The effect of steam activation of ACH on simultaneous SO2 and NO removal over V2O5/ACH was studied. Results indicate that the catalyst has high SO2 and NO removal activities at 200℃ and the steam activation has little effect on the activities. For the 2% V2O5/ACH catalyst, steam activation at 850℃ shows good SO2 removal activity. The steam concentration, ranging from 28% to 80%, shows only a small effect on the catalyst's activity. Regeneration of the used catalyst in NH3 significantly improves the NO removal activity and increases the SO2 removal activity. Under the conditions used, the optimum pretreatment results in a 2% V2O5/ACH catalyst with SO2 capacity of 4.9% and NO conversion of 93% while SO2 conversion decreases to 80%.