板式脱硝催化剂的再生研究

Research on regeneration of plate denitration catalyst

以某电厂失效的板式脱硝催化剂为研究对象,通过浸泡清洗、微孔清洗和活性植入等试验方法,探讨了有效的板式脱硝催化剂再生工艺。采用XRD、BET等表征手段研究了再生前后催化剂结构和性能的变化。结果表明,再生处理后失活催化剂活性组分的负载量提高了165%;K、Na等碱金属清除率较高,分别为63.85%和73.94%,基本接近新催化剂的水平;催化剂脱硝活性提高19%以上,微孔中的堵塞和中毒清除效果明显,BET和孔容提高,微孔结构得到恢复。XRD表明再生后V2O5等活性成分仍然以高分散的形态分布在钛白粉载体表面上。

Using of waste plate deNO, catalyst in a power plant as material,the effective plate deN（） catalyst re- generation process was developed by cleaning of soak, micro porous and reloading active substance. Through the characteriation such as XRD and BET, the influences of structure and performance of before and after re- generation catalyst were investigated. The results showed that the catalyst regenerated had a 165% increase of reloading active substance. K, Na were effective removed, ,63.85% and 73.94% respectively, which basic ap- proach of new catalyst. The catalysts deNO, activity was increased at least 19%. Pore clogging and poisoning were effective scavenged, BET and pore volume were improved,the micro porous structure was recovered. XRD patterns proved that V2O5 highly disperse in titanium dioxide on the surface of carrier after regeneration.