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Experimental Study on the Deactivating Effect of KNO3, KCl, and K2SO4 on Nanosized CeriaTitania SCR Catalyst
Joint Authors
Chen, Xiongbo
Cen, Chaoping
Tang, Zhixiong
Zeng, Wenhao
Fang, Ping
Liu, Kunyuan
Source
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-10-26
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Nanosized Ce/TiO2 is effective in selective catalytic reduction of NO with NH3.
The NO conversion of Ce/TiO2 is 93% at 370°C.
However, addition of potassium using KNO3, KCl, or K2SO4 as precursors effectively deactivates Ce/TiO2.
NO conversion at 370°C is reduced to 45%, 24%, and 16% after addition of KNO3, KCl, and K2SO4, respectively, with a controlled K/Ce molar ration at 0.25.
The deactivation may be attributed to the changes in the structural and chemical state of ceria and the degradation of surface acidity.
The transformation of amorphous ceria into ceria crystals after potassium addition, together with the decrease of surface defects, is also determined.
Oxygen diffusion in the process of ceria reduction is slow, and the redox cycle is slowed down.
Moreover, the surface acid sites are markedly destroyed, leading to the reduced capacity of ammonia adsorption.
These results may provide useful information for the application and life management of CeO2/TiO2 in potassium-rich environments such as biofuel-fired boilers.
American Psychological Association (APA)
Chen, Xiongbo& Fang, Ping& Zeng, Wenhao& Liu, Kunyuan& Tang, Zhixiong& Cen, Chaoping. 2015. Experimental Study on the Deactivating Effect of KNO3, KCl, and K2SO4 on Nanosized CeriaTitania SCR Catalyst. Journal of Nanomaterials،Vol. 2015, no. 2015, pp.1-10.
https://search.emarefa.net/detail/BIM-1069076
Modern Language Association (MLA)
Chen, Xiongbo…[et al.]. Experimental Study on the Deactivating Effect of KNO3, KCl, and K2SO4 on Nanosized CeriaTitania SCR Catalyst. Journal of Nanomaterials No. 2015 (2015), pp.1-10.
https://search.emarefa.net/detail/BIM-1069076
American Medical Association (AMA)
Chen, Xiongbo& Fang, Ping& Zeng, Wenhao& Liu, Kunyuan& Tang, Zhixiong& Cen, Chaoping. Experimental Study on the Deactivating Effect of KNO3, KCl, and K2SO4 on Nanosized CeriaTitania SCR Catalyst. Journal of Nanomaterials. 2015. Vol. 2015, no. 2015, pp.1-10.
https://search.emarefa.net/detail/BIM-1069076
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1069076