Promotional Effect of Molybdenum Additives on Catalytic Performance of CeO/AlO for Selective Catalytic Reduction of NO
Catalysis Letters, ISSN: 1572-879X, Vol: 146, Issue: 7, Page: 1221-1230
2016
- 16Citations
- 14Captures
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Article Description
Abstract: A series of CeO/AlO and CeMoO/AlO catalysts were prepared by an extrusion method for selective catalytic reduction of NO, and were characterized by techniques of XRD, XPS, N-BET, H-TPR and NH-TPD. Promotional effects of molybdenum additives on catalytic performances and tolerances toward SO and HO poisoning of the catalysts were comparatively studied. Results showed that the CeO/AlO catalyst with the Ce/Al molar ratio of 1:5 exhibited the best catalytic performance; molybdenum additives greatly improved catalytic performance of the CeMoO/AlO catalysts, and the catalyst with the Al/Ce/Mo molar ratio of 5:1:0.15 calcinated at 550 °C exhibited the highest catalytic activity above 95 % in active temperature window of 250–430 °C under the gas hourly space velocity (GHSV) of 7200 h. Moreover, molybdenum additives broadened the range of the active temperature, and significantly enhanced the anti-sulfur poisoning ability. Analysis showed that the promotional effects of molybdenum additives were attributed to the improvement of specific surface area, increment of surface acidity and the enhancement of the redox properties. Graphical Abstract: The molybdenum additives significantly increase the catalytic performance of CeO/AlO for selective catalytic reduction of NO and greatly broaden the range of the active temperature. The reasons mainly due to molybdenum additives improve the specific surface area, increase the proportion of Ce/(Ce+Ce) and O/(O + O) on the surface, and enhance the amount of the Lewis acid sites.[Figure not available: see fulltext.]
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84963771906&origin=inward; http://dx.doi.org/10.1007/s10562-016-1739-0; http://link.springer.com/10.1007/s10562-016-1739-0; http://link.springer.com/content/pdf/10.1007/s10562-016-1739-0; http://link.springer.com/content/pdf/10.1007/s10562-016-1739-0.pdf; http://link.springer.com/article/10.1007/s10562-016-1739-0/fulltext.html; https://dx.doi.org/10.1007/s10562-016-1739-0; https://link.springer.com/article/10.1007/s10562-016-1739-0
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