实验通过溶胶-凝胶法制备了MnOx/TiO2脱硝催化剂,以KNO3作为K2O的前驱物模拟催化剂钾中毒,通过SEM,XRD,BET,XPS,NH3-TPD,DRIFTS方法对催化剂微观结构及性能进行表征.在SCR活性试验仪上研究不同含量的K2O对催化剂脱硝活性的影响,结果发现:K2O对于催化剂的毒性较强,随着添加量的增大,催化剂脱硝活性急剧下降,比表面积和孔容逐渐下降.NH3-TPD及DRIFTS结果表明K2O中毒后催化剂表面酸量大大减少,主要原因是K2O的K+与催化剂的活性酸性位结合从而阻碍了NH3在催化剂上的吸附,导致催化剂脱硝率大大下降.
参考文献
| [1] | 朱崇兵,金保升,仲兆平,李锋,陈玲霞,翟俊霞.K2O对V2O5-WO3/TiO2催化剂的中毒作用[J].东南大学学报（自然科学版）,2008(01):101-105. |
| [2] | 邢新艳,肖勇,郭彦霞,杨建丽,刘振宇.添加金属氧化物的V2O5/AC在烟气脱SO2及脱SO2后H2再生制备硫磺的活性研究[J].燃料化学学报,2008(03):349-353. |
| [3] | Raziyeh Khodayari;C. U. Ingemar Odenbrand .Deactivating Effects of Lead on the Selective Catalytic Reduction of Nitric Oxide with Ammonia over a V_2O_5/WO_3/TiO_2 Catalyst for Waste Incineration Applications[J].Industrial & Engineering Chemistry Research,1998(4):1196-1202. |
| [4] | Huang HY.;Yang RT. .Removal of NO by reversible adsorption on Fe-Mn based transition metal oxides[J].Langmuir: The ACS Journal of Surfaces and Colloids,2001(16):4997-5003. |
| [5] | Saleh M. Saqer;Dimitris I. Kondarides;Xenophon E. Verykios .Catalytic oxidation of toluene over binary mixtures of copper, manganese and cerium oxides supported on γ-Al2O3[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2011(3/4):275-286. |
| [6] | Larachi F.;Pierre J.;Adnot A.;Bernis A. .Ce 3d XPS study of composite CexMn1-xO2-y wet oxidation catalysts[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2002(1/4):236-250. |
| [7] | Min Kang;Eun Duck Park;Ji Man Kim .Manganese oxide catalysts for NOx reduction with NH3 at low temperatures[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2007(2):261-269. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%