Low-Temperature Selective Catalytic Reduction (SCR) of NOx with n-Octane Using Solvent-Free Mechanochemically Prepared Ag/Al2O3 Catalysts

Palygorskite supported manganese oxide catalysts (MnOx/PG) were prepared for lower temperature selective catalytic reduction (SCR) of NOx by NH3. Catalyst’s SCR activity was estimated at varied temperatures. Catalyst’s properties were characterized by XRD, NH3adsorption and TPD. Results showed that MnOx/PG catalyst was highly active for SCR at low-temperature. It was also found that NH3 was mainly adsorbed on palygorskite in two forms. Weakly adsorbed NH3, which was seldom inhibited by loading of MnOx, but was more favorable to SCR. Whereas strongly adsorbed NH3was more likely to be inhibited by MnOx loading but was inessential for SCR.

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Low Temperature Selective Catalytic Reduction of NOx with NH3 over MnOx /TiO2 Catalyst

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.295-298.364 ◽

2013 ◽

Vol 295-298 ◽

pp. 364-369 ◽

Cited By ~ 4

Author(s):

Jun Lin Xie ◽

Zheng Bing Fu ◽

Feng He ◽

De Fang

Keyword(s):

Low Temperature ◽

Selective Catalytic Reduction ◽

Manganese Oxides ◽

Catalytic Reduction ◽

Sol Gel ◽

Soft Template ◽

Excess Oxygen ◽

Narrow Slit ◽

Transport Pathways ◽

Scr Of Nox

Amorphous phase MnOx/TiO2 catalysts were prepared by two different methods, their catalytic activities for low temperature selective catalytic reduction (SCR) of NOx with NH3 in the presence of excess oxygen were investigated. The catalysts were characterized by XRD, XPS and HRTEM. The results showed that the catalyst prepared by soft template method had better catalytic active than those prepared by sol-gel method, its catalytic property could reach 98.2% at 200°C. From the microstructure characterization, it could be known that the catalyst prepared by soft template had the shape of nanorod, this shape was contributed to the dispersion of the manganese oxides and possessed higher surface lattice oxygen concentration. Furthermore, narrow slit-shaped pores associated with rod-like particles could provide efficient transport pathways to reactant molecules and products. Due to these, the catalyst performed catalytic active very well.

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Preparation and performance of V2O5-CeO2-SiO2 catalyst for the selective catalytic reduction (SCR) of NOx with NH3 at low temperature

2012 IEEE Symposium on Business, Engineering and Industrial Applications ◽

10.1109/isbeia.2012.6422999 ◽

2012 ◽

Cited By ~ 1

Author(s):

M. R. Sohot ◽

U. S. Jais ◽

M. R. Sulaiman

Keyword(s):

Low Temperature ◽

Selective Catalytic Reduction ◽

Catalytic Reduction ◽

And Performance ◽

Scr Of Nox

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Novel Homogeneous and Mesoporous MnOx-Doped Ceria Nanosheets as Catalysts for Low-Temperature Selective Catalytic Reduction

Australian Journal of Chemistry ◽

10.1071/ch19068 ◽

2019 ◽

Vol 72 (9) ◽

pp. 657

Author(s):

Yan Yue ◽

Yanhua Wang ◽

Jun Ling ◽

Weilin Sun ◽

Zhiquan Shen

Keyword(s):

Low Temperature ◽

Selective Catalytic Reduction ◽

Photoelectron Spectroscopy ◽

Catalytic Reduction ◽

Bet Surface Area ◽

Homogeneous Distribution ◽

X Ray Diffraction ◽

X Ray ◽

Co Precipitation ◽

Scr Of Nox

The development of a catalyst for the selective catalytic reduction (SCR) of NOx is essential for purifying air and the denitration of coal-burning exhaust. Herein, we prepare novel MnOx-CeO2 nanosheets with porous structures by a homogeneous coordination precipitation (HCP) method which exhibit a high NO removal efficiency above 90% in the SCR reaction at low temperature (150–240°C). The MnOx-CeO2(HCP) catalysts have a higher Brunauer–Emmett–Teller (BET) surface area and more homogeneous distribution of Mnx+ in the CeO2 lattice than those prepared by co-precipitation and precursor mixture combustion methods according to BET, X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, and X-ray photoelectron spectroscopy characterizations. Together with a higher ratio of Mn4+, Ce3+, and Oα, the above properties are responsible for the high catalytic performances of MnOx-CeO2(HCP) in the SCR of NOx.

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