Heteropoly acid promoted Cu and Fe catalysts for the selective catalytic reduction of NO with ammonia
Heteropoly acid promoted Cu and Fe catalysts for the selective catalytic reduction of NO with ammonia
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DOI：
10.1016/j.cattod.2010.11.087
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发表时间：
2011-11-01
期刊：
影响因子：
5.3
通讯作者：
Fehrmann, Rasmus
中科院分区：
文献类型：
--
作者：
Putluru, Siva Sankar Reddy;Mossin, Susanne;Fehrmann, Rasmus
制备了Cu/TiO2、Fe/TiO2和杂多酸促进的Cu/TiO2、Fe/TiO2催化剂，并通过N-2吸附、XRPD、NH3-TPD、H-2-TPR和EPR对其进行了表征。催化剂表现为TiO2晶体相，活性金属和促进剂呈高度分散态。研究了其酸性性质，并与氨选择性催化还原NO的催化活性进行了比较。杂多酸催化催化剂的SCR活性和酸度值均明显高于非催化催化剂。钾毒物对催化催化剂的SCR活性和酸度的影响小于未催化催化剂。在杂多酸促进催化剂中，由于钾与Bronsted酸中心结合，使SCR活性Cu和Fe金属免受钾毒害。因此，杂多酸催化催化剂可能适用于生物质发电厂SCR的应用。(C) 2011 Elsevier B.V.版权所有
Cu/TiO2, Fe/TiO2 and heteropoly acid promoted Cu/TiO2, Fe/TiO2 catalysts were prepared and characterized by N-2 physisorption, XRPD, NH3-TPD, H-2-TPR and EPR. The catalysts exhibited only crystalline TiO2 phases with the active metals and promoters in highly dispersed state. The acidic properties were studied and compared with the catalytic activity for the selective catalytic reduction (SCR) of NO with ammonia. The SCR activities and acidity values of heteropoly acid promoted catalysts were found to be much higher than unpromoted catalysts. The influence of potassium poisons on the SCR activity and acidity was lower for promoted catalysts than for unpromoted catalysts. In the heteropoly acid promoted catalysts the SCR active Cu and Fe metals were protected from potassium poisons by bonding of the potassium to the Bronsted acid centres. Thus heteropoly acid promoted catalysts might be suitable for biomass fired power plant SCR applications. (C) 2011 Elsevier B.V. All rights reserved.