金属负载型催化剂对烟气脱硫性能的影响

Performance of metal supported catalysts on flue gas desulphurization

介绍了国内外烟气脱硫催化剂的研究现状,研究了金属氧化物负载型催化剂对烟气脱硫性能的影响。以活性炭(AC)为载体,选用8种不同的金属硝酸盐作为浸渍液,采用等体积浸渍法制备金属氧化物负载型催化剂。以脱硫效果较好的Fe2O3/AC为例,研究了不同焙烧温度、金属负载量以及焙烧时间对催化剂脱硫性能的影响。实验结果表明,Fe2O3/AC催化剂脱硫率随着金属负载量的增加呈递增趋势,最优金属负载量为10.0%(质量分数);脱硫率随着焙烧温度的增加显著提高,最优焙烧温度为350℃;脱硫率随着焙烧时间的增加而提高,最优焙烧时间为3.0h。

The current research status of catalyst used for catalytic desulfurization of flue gas was introduced in this paper, and the performance of metal supported catalyst was specifically researched. With active carbon as the car- rier, metal nitrate as pickling liquid, 8 kinds of metal supported catalyst was prepared through equivalent volume im- pregnation method. Among the 8 metal supported catalysts, Fe203/AC presented the best catalytic activity. The in- fluence of the calcination temperature, metal loadings quantity and calcination time on desulfurization performance of Fe2 03/AC was further investigated. The results showed that the desulfurization rate of Fe2 03/AC was increased with increasing the Fe loadings quantity, the optimal Fe loading quantity was 10 % （mass ratio）. The desulfurization rate of Fez O3/AC was positive correlated the calcination temperature and time, and the best operating conditions was calcina- tion at 350 ℃ for 3.0 h.