采用共浸渍负载成型法制备了MnOx-MoO3/TiO2-Al2O3(MMTA)催化剂,研究了该系列催化剂在NH3选择性催化还原反应(NH3-SCR反应)中的脱硝性能.通过固定床连续反应器考察了温度及不同载体对SCR反应的影响.采用X射线衍射(XRD)、BET、扫描电镜(SEM)等表征手段对该催化剂进行了表征,研究了催化剂的晶相、微观形貌.试验结果表明,与TiO2(T)载体相比,TiO2-Al2O3(TA)载体有较大的比表面积和孔体积.在空速为10000 h-1,150～450℃范围内,MMTA催化剂还原NOx的转化率高达75％～95％.活性组分MnOx在TiO2-Al2O3(TA)载体上分散较好,TiO2-Al2O3(TA)载体催化剂表现出良好的催化活性和高温稳定性,可有效控制氮氧化物的排放.
参考文献
| [1] | 李云涛,钟秦.低温NH3-SCR反应机理及动力学研究进展[J].化学进展,2009(06):1094-1100. |
| [2] | Bosch H;Janssen F .Formation and control of nitrogen oxides[J].Catalysis Today,1988,2(04):369-379. |
| [3] | Kijlstra WS.;Poels EK.;Bliek A.;Brands DS. .MECHANISM OF THE SELECTIVE CATALYTIC REDUCTION OF NO BY NH3 OVER MNOX/AL2O3 .1. ADSORPTION AND DESORPTION OF THE SINGLE REACTION COMPONENTS[J].Journal of Catalysis,1997(1):208-218. |
| [4] | 寻洲,童华,黄妍,童志权.Mn-Ce-Fe/TiO2 低温催化还原NO的性能[J].环境科学学报,2008(09):1733-1738. |
| [5] | 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. |
| [6] | 吴碧君,刘晓勤,王述刚,朱林,曹林岩.MnOx/TiO2 低温NH3选择性催化还原NOx的研究与表征[J].燃烧科学与技术,2008(03):221-226. |
| [7] | Qi GS.;Yang RT. .Low-temperature selective catalytic reduction of NO with NH3 over iron and manganese oxides supported on titania[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2003(3):217-225. |
| [8] | 陈志航,李雪辉,杨青,李华,高翔,江燕斌,王芙蓉,王乐夫.新型铁锰复合氧化物催化低温脱除NOx[J].物理化学学报,2009(04):601-605. |
| [9] | 吴碧君,肖萍,马进,刘晓勤.MnOx-WO3/TiO2 用于NH3选择性催化还原NOx的性能与抗SO2毒性研究[J].中国电机工程学报,2010(11):62-67. |
| [10] | Gongshin Qi;Ralph T. Yang .Performance and kinetics study for low-temperature SCR of NO with NH_3 over MnO_x-CeO_2 catalyst[J].Journal of Catalysis,2003(2):434-441. |
| [11] | Benjaram M R;Biswajit C;Ettireddy P R et al.An XPS study of dispersion and chemical state of MoO3 on Al2 O3-TiO2 binary oxide support[J].Applied Catalysis A:General,2001,213:279-288. |
| [12] | Li J H;Zhu Y Q;Ke R et al.Improvement of catalytic activity and sulfur-resistance of Ag/TiO2-Al2O3 for NO reduction with propene under lean bum conditions[J].Applied Catalysis B:Environmental,2008,80(03):202-213. |
| [13] | Masato Machida;Masatoshi Uto;Daisuke Kurogi;Tsuyoshi Kijima .MnO_x-CeO_2 Binary Oxides for Catalytic NO_x Sorption at Low Temperatrues. Sorptive Removal of NO_x[J].Chemistry of Materials,2000(10):3158-3164. |
| [14] | 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. |
| [15] | Donovan A.Pena;Balu S.Uphade;Panagiotis G.Smirniotis .TiO_2-supported metal oxide catalysts for low-temperature selective catalytic reduction of NO with NH_3 I.Evaluation and characterization of first row transition metals[J].Journal of Catalysis,2004(2):421-431. |
| [16] | Lietti L;Svachula J;Forzatti P et al.Surface and catalytic properties of vanadia-titania and tungsta-titania systems in the selective catalytic reduction of nitrogen oxides[J].Catalysis Today,1993,17(01):131-139. |
| [17] | Luca Lietti;Isabella Nova;Gianguido Ramis;Lorenzo Dall'Acqua;Guido Busca;Elio Giamello;Pio Forzatti;Fiorenzo Bregani .Characterization and Reactivity of V_2O_5-MoO_3/TiO_2 De-NO_x SCR Catalysts[J].Journal of Catalysis,1999(2):419-435. |
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