Selective catalytic reduction of NOx with propene over SnO2/Al2O3 catalyst
Selective catalytic reduction of NOx with propene over SnO2/Al2O3 catalyst
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SnO2/Al2O3 催化剂上丙烯选择性催化还原 NOx
DOI：
10.1016/j.cej.2010.09.009
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发表时间：
2010-12-01
影响因子：
15.1
通讯作者：
Hao, Jiming
中科院分区：
文献类型：
--
作者：
Liu, Zhiming;Li, Junhua;Hao, Jiming
研究了浸渍法制备的SnO2/Al_2O_3催化剂和一步法溶胶-凝胶法制备的SnO_2/Al_2O_3催化剂上丙烯选择性催化还原NOx的性能。催化剂的制备方法对催化剂的催化性能有显著影响，溶胶-凝胶法制备的SnO_2/Al_2O_3比浸渍法制备的催化剂具有更高的活性。此外，它的耐水性更高。Sol-Gel SnO2/Al_2O_3催化剂的高比表面积和SnO_2与Al_2O_3之间的强相互作用可能是其高还原活性的原因。氧气的存在非常有利于NOx的还原过程。FT-IR结果表明，氧的作用是促进甲酸盐、乙酸酯和硝酸盐物种的形成，这些物种都是NOx还原的活性中间体。(C)2010爱思唯尔B.V.保留所有权利。
Selective catalytic reduction of NOx with propene has been investigated over SnO2/Al2O3 catalysts prepared by impregnation and single step sol-gel methods. Catalyst preparation method exerts significant influence on the catalytic performance, and SnO2/Al2O3 prepared by the sol-gel method is more active than the impregnated catalyst. Moreover, its resistance against water is higher. The high surface area and the strong interaction between SnO2 and Al2O3 may be responsible for the high reduction activity of sol-gel SnO2/Al2O3 catalyst. The presence of oxygen strongly favours the NOx reduction process. FT-IR results have revealed that the role of oxygen is to contribute to the formation of formate, acetate and nitrate species, all of which are reactive intermediates for NOx reduction. (C) 2010 Elsevier B.V. All rights reserved.