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首页> 外文期刊>Catalysis science & technology >The synergistic effects between Ce and Cu in CuyCe1-yW5Ox catalysts for enhanced NH3-SCR of NOx and SO2 tolerance
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The synergistic effects between Ce and Cu in CuyCe1-yW5Ox catalysts for enhanced NH3-SCR of NOx and SO2 tolerance

机译：Ce和铜之间的协同效应CuyCe1-yW5Ox增强NH3-SCR的催化剂氮氧化物和二氧化硫宽容

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摘要

Manganese-based metal oxides are promising catalysts for the NH3-SCR (selective catalytic reduction) of NOx at low temperatures. However, manganese-based catalysts usually exhibit poor SO2 and H2O tolerance. In order to overcome the fatal shortcoming, non-manganese-based CuyCe1-yW5Ox catalysts (y = 0, 0.4, 0.5, 0.6, 1.0) are synthesized successfully by a standard co-precipitation method, and the catalytic performances of these catalysts are tested by the NH3-SCR of NOx. The results show that there are synergistic effects between Cu and Ce, which affect the CuyCe1-yW5Ox catalysts in many aspects, such as the specific surface area, the surface contents of Ce3+ and Cu2+, the reductive strength and the amount of weak and strong acid sites on the surface. Moreover, the synergistic effects also have an impact on the de-NOx mechanism of CuyCe1-yW5Ox catalysts, and finally decide their catalytic performances. Among all the CuyCe1-yW5Ox catalysts, the Cu0.5Ce0.5W5Ox catalyst shows the best catalytic de-NOx performance and good tolerance to SO2 and H2O poisoning. This work may provide a suggestion for the design of non-manganese-based SCR catalysts with the desired de-NOx performance and good SO2 tolerance by making use of the synergistic effects between different metal oxides.
机译：Manganese-based金属氧化物是有前途的NH3-SCR催化剂(选择性催化减少氮氧化物在低温下)。manganese-based催化剂通常表现出较差的二氧化硫和水宽容。致命的缺点,non-manganese-basedCuyCe1-yW5Ox催化剂(y = 0, 0.4, 0.5, 0.6,1.0)合成成功的标准共同沉淀方法,催化表演这些催化剂是测试的NH3-SCR氮氧化物。铜之间的协同效应和Ce影响CuyCe1-yW5Ox催化剂在许多方面,如比表面积、表面Ce3 +和Cu2 +内容,还原力量和软弱和强酸的数量网站表面上。de-NOx效果也有影响CuyCe1-yW5Ox催化剂机理,最后决定他们的催化性能。Cu0.5Ce0.5W5Ox CuyCe1-yW5Ox催化剂展示了最好的催化de-NOx催化剂性能和良好的耐SO2和水中毒。的设计non-manganese-based SCR催化剂与期望的de-NOx性能和良好的二氧化硫利用协同的承受力不同金属氧化物之间的影响。

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