氧化镁基催化吸附剂的制备及脱硝性能研究

Magnesia base catalyst-sorbent for denitrification of flue gas

采用共混合法制备氧化镁基催化吸附剂,通过正交实验设计找出其组分的最佳配比。利用该催化吸附剂对烟气进行脱硝实验,考察了焙烧温度、焙烧时间和床层温度对氧化镁基催化吸附剂去除NO的影响。结果表明,利用氧化镁基催化吸附剂可以对烟气进行直接催化分解脱硝,其最佳的焙烧温度和时间分别为350～500℃和3～4h,脱硝率可达85%～95%。利用红外光谱(FT-IR)、X射线衍射(XRD)对脱硝处理前后的氧化镁基催化吸附剂进行了分析,探讨其脱硝的机制。

New magnesia base catalyst-sorbent were prepared by co-mixed method. The best match of ingredient were found out through orthogonal design. The denitrification efficiency of magnesia base catalyst-sorbent were researched, and the effects of calcination temperature and time, denitrification bed temperature on removal rate of NO were determined. The results showed that magnesia base catalyst-sorbent was available to denitrification of flue gas by direct catalytic decomposition method the best calcinations time and temperature was 3-4 h and 350-500 ℃ ,and the denitrification rate was 85%- 95%. The structure and shape of magnesia base catalyst-sorbent before and after denitrification were characterized by XRD and FT-IR. Its mechanism of denitrification was analyzed.