含砷SCR脱硝催化剂再生处理实验研究

EXPERIMENTAL STUDY ON REGENERATION OF ARSENIC-CONTAINING SCR DENITRATION CATALYST

通过空气清灰、筛分、碱浸、酸洗、活性组分补充等方式对砷中毒的SCR脱硝催化剂进行再生处理。采用BET、XRD、XRF、ICP等检测方法对再生催化剂进行了表征,对再生后催化剂的脱硝性能进行测试并与新鲜催化剂对比。结果表明:再生催化剂的砷去除率可达99%,脱硝效率在150℃～450℃范围内与新鲜催化剂脱硝效率基本一致;中毒和再生均不改变催化剂的载体结构,经再生后其活性组分负载均匀。

Arsenic poisoned SCR denitration catalyst was regenerated by air cleaning,sieving,alkali leaching,picklingand active component replenishment.The regenerated catalyst was characterized by BET,XRD,XRF,ICP,etc.The denitration performance of the regenerated catalyst was tested and compared with fresh catalyst.The results showed that the arsenic removal rate of regenerated catalyst could reach 99%.The activity of regenerated catalyst was almost the same as that of fresh catalyst in the temperature range of 150°C^450°C.The characterization results showed that poisoning and regeneration did not change the carrier structure of the catalyst,and the active components were loaded evenly after regeneration.