Catalytic reduction of NO by CO with Cu-based and Mn-based catalysts

Kuan Lun Pan, Chyi Woei Young, Guan Ting Pan, Moo Been Chang

研究成果: 雜誌貢獻期刊論文同行評審

24 引文 斯高帕斯(Scopus)

摘要

Various Cu-based and Mn-based catalysts are prepared and evaluated for the reduction of NO with CO process. Cu-Ce-Fe-Co/TiO2 and Mn-Ce-Fe-Co/TiO2 show the best catalytic performance for the reduction of NO with CO process among Cu-based and Mn-based catalysts, respectively. The highest conversions of NO and CO achieved with Cu-Ce-Fe-Co/TiO2 reach 100% and 79%, respectively, with the operating temperature of 250 ℃, while 100% and 70% are achieved with Mn-Ce-Fe-Co/TiO2 for the gas streams containing 200 ppm NO and 200 ppm CO. The results reveal that both modified catalysts (e.g., Cu-Ce-Fe-Co/TiO2 and Mn-Ce-Fe-Co/TiO2) have good activities for CO + NO reaction. Overall, Cu-Ce-Fe-Co/TiO2 has better tolerance for O2, SO2 and H2O(g) than Mn-Ce-Fe-Co/TiO2. Good catalytic performance of Cu-Ce-Fe-Co/TiO2 toward NO reduction is attributed to its good surface properties, i.e., reducibility, oxygen mobility and more oxygen vacancies. Additionally, the apparent activation energy is calculated as 54.2 kJ/mol is calculated using Mars-Van Krevelen model for reduction of NO with CO process with Cu-Ce-Fe-Co/TiO2 as catalyst. Further, active component Cu-Ce-Fe-Co is loaded on activated carbon (AC) to form Cu-Ce-Fe-Co/AC, which is applied as catalyst for durability test. The results indicate that NO conversion achieved with Cu-Ce-Fe-Co/AC maintains at 100% during 240 min operation period, even in the simultaneous presence of O2, H2O(g) and SO2. Overall, this study demonstrates that Cu-based catalyst is promising for the reduction of NO with CO process.

原文???core.languages.en_GB???
頁(從 - 到)15-25
頁數11
期刊Catalysis Today
348
DOIs
出版狀態已出版 - 15 5月 2020

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