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Promotional effect of Ba additives on MnCeOx/TiO2 catalysts for NH3-SCR of NO at low temperature

Published online by Cambridge University Press:  06 July 2018

Youchun Pan ,
Yuesong Shen ,
Qijie Jin  and
Shemin Zhu
Youchun Pan
Affiliation:
College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China; Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, China; and Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 210009, China
Yuesong Shen*
Affiliation:
College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China; Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, China; and Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 210009, China
Qijie Jin
Affiliation:
College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China; Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, China; and Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 210009, China
Shemin Zhu
Affiliation:
College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China; Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, China; and Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 210009, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

A series of Ba-modified MnCeOx/TiO2 catalysts were prepared by a wet impregnation method and tested for selective catalytic reduction (SCR) of NO with NH3 at low temperature. The results showed that Ba additives obviously improved the catalytic performance of the MnCeOx/TiO2 catalyst for NH3-SCR, and the BaMnCeOx/TiO2 catalyst with 3 wt% BaO exhibited the optimal catalytic performance. Moreover, the introduction of Ba also improved the resistances toward water vapor and SO2 of catalysts. The N2 adsorption, H2-TPR, and X-ray photoelectron spectroscopy results showed that the addition of Ba increased the specific surface area, redox properties, and concentrations of surface Mn4+ and chemisorbed oxygen of catalysts. Furthermore, NH3-TPD and NO-TPD were used to investigate the absorption of NH3 and NO on the catalyst. The results revealed that although the introduction of Ba significantly promoted the adsorption of NO, it also inhibited the adsorption of NH3. Consequently, the catalytic performance of MnCeOx/TiO2 was greatly improved with the Ba additives.

Keywords

MnCeOx/TiO2Ba additivespromotional effectselective catalytic reductionNO removal
Type
Article
Information
Journal of Materials Research , Volume 33 , Issue 16 , 28 August 2018 , pp. 2414 - 2422
Copyright
Copyright © Materials Research Society 2018 

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