低温等离子体协同CuO/海泡石催化脱除NO

采用硝酸浸泡和硝酸铜改性海泡石并经高温煅烧,制得改性海泡石催化剂协同介质阻挡放电反应器产生的低温等离子体脱除NO。通过XRD分析发现海泡石原矿经硝酸洗涤可有效去除其中Mg以及其他以不同化合物形态出现的杂质,海泡石原矿经酸洗提纯、浸渍硝酸铜溶液、干燥、煅烧等工艺过程处理可在载体表面形成稳定的CuO物相,并且海泡石基本结构没有发生明显变化,证明海泡石结构稳定,是良好的催化剂载体。通过SEM测定表明酸洗可有效增加海泡石孔道截面和孔道数,增大其比表面积;并且活性组分均匀分布在催化剂表面及孔道中,在负载量适中时未发现较大聚集颗粒。证明改性海泡石催化剂协同低温等离子体对NO具有良好的脱除效果。

NO Removal by Non-thermal Plasma Combined with CuO/Sepiolite Catalyst

Nitric acid soak and copper nitrate modified sepiolite calcined at high temperatures,the modified catalyst combined with DBD plasma reactor to remove NO.XRD analysis showed that sepiolite ore by nitric acid washing can effectively remove Mg and other forms appear in different compounds,sepiolite ore by acid washing and purifing,soading copper nitrate solution,drying,calcinations technologies process can form a stable CuO phase in the surface,and the basic structure of sepiolite did not change significantly,proof the structure of sepiolite stability and sepiolite is a good catalyst carrier.Determined by SEM showed that acid washing can make sepiolite the cross-section and the number of channel can effectively increase,increasing its surface area;and the active component distributed uniformly in the catalyst surface and pores,in the moderate load large aggregation particles are not discovered.The investigation proved the modified sepiolite catalyst combined with non-thermal plasma had the good ability to remove NO.