砷中毒脱硝催化剂再生技术研究

A Study on the Regeneration Technology of the Arsenic Poisoned De-NO_(x) Catalyst

本文提出了通过超声波+水浴加热和水浴加热两种方法在碱性溶液中对砷中毒脱硝催化剂进行深度清洗,并通过负载的方式将清洗后催化剂活性组分增加至与新鲜催化剂相当的水平,实现了砷中毒催化剂再生。借助XRF、BET、XRD的表征手段,发现该再生技术对砷中毒催化剂中砷的去除率高达94%以上,且可将催化剂比表面积恢复至新鲜催化剂水平,最终实现催化剂活性100%恢复的技术。

Ultra-sonic wave plus water bath heating or water bath heating,these two methods can be used in an alkaline solution to deeply clean the arsenic poisoned De-NO x catalyst.The active components of the cleaned sample can be increased to the level of the fresh catalyst by dipping to realize the regeneration of the catalyst.The XRF,BET and XRD can be employed to characterize the physical and chemical properties of the catalyst.The results show that the regeneration technology can reach a arsenic removal rate of 94%in the arsenic poisoned catalyst.In addition,the technology can restore the specific surface area of the arsenic poisoned catalyst to the level of the fresh catalyst and achieve complete recovery of the activity of the catalyst.