MnFeTiOx/attapulgite catalysts with excellent potassium resistance for SCR of NOx with NH3 at low temperatures

A series of metal oxides (MnFeOx, MnCrOx, MnTiOx, and MnFeTiOx) supported on attapulgite (ATP) were synthesized by coprecipitation for the low-temperature selective catalytic reduction (SCR) of NOx with NH3. Then, they were subjected to appropriate characterizations for their properties (XRD, TEM, B...

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Published inJournal of materials research Vol. 34; no. 7; pp. 1188 - 1199
Main Authors Tang, Yiran, Tao, Yiyang, Wu, Jiayi, Xu, Linjing, Huang, Xiaoyan, Zhou, Xingmeng, Xie, Aijuan, Luo, Shiping, Yao, Chao, Li, Xiazhang
Format Journal Article
LanguageEnglish
Published New York, USA Cambridge University Press 15.04.2019
Springer International Publishing
Springer Nature B.V
Subjects
Acids
Ammonia
Applied and Technical Physics
Biomaterials
Carbon
Catalysts
Catalytic activity
Catalytic converters
Conversion
Denitration
Efficiency
Flue gas
Gases
Inorganic Chemistry
Low temperature
Materials Engineering
Materials research
Materials Science
Metal oxides
Nanotechnology
Nitrogen oxides
Polyvinyl alcohol
Potassium
Power plants
Raw materials
Selective catalytic reduction
Selectivity
Temperature
Titanium
Vanadium
X ray photoelectron spectroscopy
NOx conversion
selective catalytic reduction
potassium resistance
low temperature
MnFeTiOx/ATP
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Summary:A series of metal oxides (MnFeOx, MnCrOx, MnTiOx, and MnFeTiOx) supported on attapulgite (ATP) were synthesized by coprecipitation for the low-temperature selective catalytic reduction (SCR) of NOx with NH3. Then, they were subjected to appropriate characterizations for their properties (XRD, TEM, BET, XPS, etc.). The catalytic activity of MnFeTiOx/ATP catalyst was over 95% NOx conversion within a wide temperature window between of 175 and 300 °C, and 88% N2 selectivity. Moreover, MnFeTiOx/ATP presented excellent potassium resistance relative to the traditional V–W–Ti catalyst, and its denitration performance was significantly improved. The NOx conversion rate could be restored to nearly 90% at 210 °C after removing potassium via washing of K–MnFeTiOx/ATP. In addition, the MnFeTiOx/ATP showed better SO2 resistance and stability than the traditional V–W–Ti catalyst. Therefore, the MnFeTiOx/ATP catalyst has been proved to have broad prospects in NH3-SCR.
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2019.31