Effect of CO2 on the DeNO(x) Activity of a Small Pore Zeolite Copper Catalyst for NH3/SCR
SCIE
SCOPUS
- Title
- Effect of CO2 on the DeNO(x) Activity of a Small Pore Zeolite Copper Catalyst for NH3/SCR
- Authors
- Kim, YJ; Min, KM; Lee, JK; Hong, SB; Cho, BK; Nam, IS
- Date Issued
- 2014-05
- Publisher
- WILEY-V C H VERLAG GMBH
- Abstract
- Exposure of CuSSZ13 to CO2 at temperatures below 300 degrees C can deactivate its low-temperature deNOx activity during NH3/SCR, with the severity of deactivation being dependent on reaction temperature. The adsorption of NO on Cu2+ ion is inhibited by CO2 due to its competitive adsorption, while NH3 adsorption on acidic sites of CuSSZ13 is largely unaffected by CO2, as evidenced by NO- and NH3-TPD in the presence of CO2. Under O-2-rich conditions, CO2 forms unidentate carbonates on Cu2+ sites suppressing the formation of nitrates, a key reaction intermediate essential for NOx reduction during the NH3/SCR reaction, as revealed in an in situ FTIR study.
- Keywords
- carbon dioxide; copper; nitrogen oxides; reduction; zeolites; HYDROTHERMAL STABILITY; SCR CATALYSTS; DIESEL-ENGINE; ADSORPTION; UREA; NOX; DESORPTION; SORPTION; DIOXIDE; NH3
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/13870
- DOI
- 10.1002/CCTC.201400093
- ISSN
- 1867-3880
- Article Type
- Article
- Citation
- CHEMCATCHEM, vol. 6, no. 5, page. 1186 - 1189, 2014-05
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- There are no files associated with this item.
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