Simultaneously achieving selective catalytic reduction of NOx with NH3 and catalytic oxidation of CO with O2 over one finely optimized bifunctional catalyst Mn2Cu1Al1Ox at low temperatures

A series of composites of Mn-Fe-Ce/GO-x have been synthesized by a hydrothermal method. Their performance in simultaneously performing the catalytic oxidation of Hg0 and the selective catalytic reduction of nitrogen oxides (NOx) in the same temperature range were investigated. In order to investigate the physicochemical properties and surface reaction, basic tests, including Brunauer-Emmett-Teller (BET), XRD, scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS) were selected. The results indicate that the active components deposited on graphene play an important role in the removal of mercury and NOx, with different valences. Especially, the catalyst of Mn-Fe-Ce/GO-20% possesses an excellent efficiency in the temperature range of 170 to 250 °C. Graphene has a huge specific surface area and good mechanical property; thus, the active components of the Mn-Fe-Ce catalyst can be highly dispersed on the surface of graphene oxide. In addition, the effects of O2, H2O, NO and SO2 on the removal efficiency of Hg0 were examined in flue gas. Furthermore, the regeneration experiments conducted by thermal methods proved to be promising methods.

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Two-stage catalyst system for selective catalytic reduction of NOx by NH3 at low temperatures

Applied Catalysis B Environmental ◽

10.1016/j.apcatb.2006.07.013 ◽

2006 ◽

Vol 68 (1-2) ◽

pp. 21-27 ◽

Cited By ~ 24

Author(s):

M KANG ◽

D KIM ◽

E PARK ◽

J KIM ◽

J YIE ◽

...

Keyword(s):

Selective Catalytic Reduction ◽

Low Temperatures ◽

Catalytic Reduction ◽

Catalyst System ◽

Two Stage ◽

Reduction Of Nox

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The Latest Research Progress of NH3-SCR in the SO2 Resistance of the Catalyst in Low Temperatures for Selective Catalytic Reduction of NOx

Catalysts ◽

10.3390/catal10091034 ◽

2020 ◽

Vol 10 (9) ◽

pp. 1034 ◽

Cited By ~ 1

Author(s):

Caixia Liu ◽

Huijun Wang ◽

Ziyin Zhang ◽

Qingling Liu

Keyword(s):

Selective Catalytic Reduction ◽

Low Temperatures ◽

Catalytic Reduction ◽

Complex Oxide ◽

Research Progress ◽

Preparation Methods ◽

Nh3 Scr ◽

So2 Resistance ◽

Reduction Of Nox ◽

Further Development

The selective catalytic reduction (SCR) has been widely used in industrial denitrification owing to its high denitrification efficiency, low operating costs, and simple operating procedures. However, coal containing a large amount of sulfur will produce SO2 during combustion, which makes the catalyst easy to be deactivated, thus limiting the application of this technology. This review summarizes the latest NH3-SCR reaction mechanisms and the deactivation mechanism of catalyst in SO2-containing flue gas. Some strategies are summarized for enhancing the poison-resistance through modification, improvement of support, the preparation of complex oxide catalyst, optimizing the preparation methods, and acidification. The mechanism of improving sulfur resistance of catalysts at low temperatures is summarized, and the further development of the catalyst is also prospected. This paper could provide a reference and guidance for the development of SO2 resistance of the catalyst at low temperatures.

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