采用共沉淀法制备一系列Fe1-xMnxOz(x为Mn物质的量比,x=0、0.1、0.3、0.5)磁性催化剂,考察Mn掺杂对γ-Fe2O3催化剂低温SCR脱硝活性的影响规律.结果表明,Mn掺杂能显著提高γ-Fe2O3的低温SCR脱硝活性,并拓宽其活性温度窗口;Fe0.7Mn0.3Oz催化剂的低温SCR脱硝活性最高,在125～200℃其NOx转化率约为100％.N2吸附及XRD分析结果表明,Mn的掺杂能优化γ-Fe2O3催化剂的孔隙结构及孔径分布,增大其比表面积和比孔容,并与催化剂中铁氧化物相互作用形成良好固溶体,从而提高γ-Fe2O3催化剂的低温SCR活性.
参考文献
| [1] | Laura Casagrande;Luca Lietti;Isabella Nova;Pio Forzatti;Alfons Baiker;Alfons Baiker .SCR of NO by NH_3 over TiO_2-supported V_2O_5-MoO_3 catalysts:reactivity and redox behavior[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,1999(1):63-77. |
| [2] | Gongshin Qi;Ralph T.Yang;Ramsay Chang .MnO_x-CeO_2 mixed oxides prepared by co-precipitation for selective catalytic reduction of NO with NH_3 at low temperatures[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2004(2):93-106. |
| [3] | 熊志波,路春美.铁铈复合氧化物催化剂SCR脱硝的改性研究[J].燃料化学学报,2013(03):361-367. |
| [4] | Fudong Liu;Hong He .Structure—Activity Relationship of Iron Titanate Catalysts in the Selective Catalytic Reduction of NO_x with NH3[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2010(40):16929-16936. |
| [5] | Shijian Yang;Caixia Liu;Huazhen Chang .Improvement of the Activity of γ-Fe2O3 for the Selective Catalytic Reduction of NO with NH3 at High Temperatures: NO Reduction versus NH3 Oxidization[J].Industrial & Engineering Chemistry Research,2013(16):5601-5610. |
| [6] | 姚桂焕,王芳,陆芳,侯家涛,归柯庭.铁基磁流化床选择性催化还原烟气脱硝[J].工程热物理学报,2009(06):987-991. |
| [7] | Lee, S.M.;Park, K.H.;Kim, S.S.;Kwon, D.W.;Hong, S.C. .Effect of the Mn oxidation state and lattice oxygen in Mn-based TiO _2 catalysts on the low-temperature selective catalytic reduction of NO by NH _3[J].Journal of the Air & Waste Management Association,2012(9):1085-1092. |
| [8] | Fudong Liu;Hong He;Yun Ding .Effect of manganese substitution on the structure and activity of iron titanate catalyst for the selective catalytic reduction of NO with NH3[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2009(1/2):194-204. |
| [9] | Shule Zhang;Hongyu Li;Qin Zhong.Promotional effect of F-doped V2O5-WO3/TiO2 catalyst for NH3-SCR of NO at low-temperature[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2012:156-162. |
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