The influence of chromium substitution on an iron–titanium catalyst used in the selective catalytic reduction of NO
The influence of chromium substitution on an iron–titanium catalyst used in the selective catalytic reduction of NO
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DOI：
10.1016/j.jcat.2012.04.007
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发表时间：
2012-08
影响因子：
7.3
通讯作者：
Asghar Karami;Vajiheh Salehi
中科院分区：
文献类型：
--
作者：
Asghar Karami;Vajiheh Salehi
采用共沉淀法制备了一系列Cr取代的Fe-Ti化合物，并系统地研究了其作为NH3选择性催化还原（SCR）NO反应催化剂的性能。各种分析技术表明，Cr取代量影响N2选择性、SCR活性、NH3/NOx的氧化还原行为、吸附能力以及催化剂的表面性质、孔隙率、晶格氧的迁移率、Cr物种的氧化能力、布朗斯特酸中心和刘易斯酸中心的比例、NOx吸附能力以及结构的无序和畸变。在一系列FeaCr 1 −aTiOx（a=1，0.75，0.5，0.2，0）催化剂中，Fe0.5Cr0.5TiOx表现出最高的活性，这是因为该催化剂中Fe、Cr和Ti物种的相互作用得到了优化。
A series of Cr-substituted Fe–Ti compounds were prepared by the co-precipitation method and were systematically investigated as catalysts for the selective catalytic reduction (SCR) of NO by NH3. A variety of analytical techniques revealed that the Cr substitution amount affects the N2selectivity, SCR activity, redox behavior of NH3/NOx, adsorption ability, and structure of catalysts in terms of surface properties, porosity, mobility of lattice oxygen, oxidative ability of Cr species, ratio of Brønsted acid sites and Lewis acid sites, NOxadsorption capacity, and structural disorder and distortion. In a series of FeaCr1−aTiOx(a=1, 0.75, 0.5, 0.2, 0) catalysts, Fe0.5Cr0.5TiOxshowed the highest activity because of the optimized interactions of Fe, Cr, and Ti species in this catalyst.