期刊
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
卷 19, 期 4, 页码 1272-1279出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2012.12.028
关键词
Low temperature; Selective catalytic reduction; Cobalt; Modification; SO2 poisoning
资金
- National Natural Science Foundation of China [NSFC 51176077]
- Key Natural Science Foundation of Tianjin [12JCZDJC29300]
Three catalysts Mn/Ce-ZrOX, Mn-Co/Ce-ZrOX and Mn/Co-Ce-ZrOX were used for low-temperature NH3-SCR of NO. XRD, TPR and XPS were performed to characterize the physicochemical property of the catalysts. Experimental results showed that Mn/Co-Ce-ZrOX had a higher dispersion of manganese oxides, a better redox property, more surface acid sites and more surface adsorbed oxygen species and Mn4+ ion. These facts caused a better low-temperature activity for Mn/Co-Ce-ZrOX which was 99.0% at 180 degrees C. Furthermore, Mn/Co-Ce-ZrOX showed the best resistance to SO2 and H2O which mainly because the introduction of cobalt inhibited the formation of sulfate salts and hydroxyls on the surface of Mn/Co-Ce-ZrOX. (c) 2013 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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