Study on Noble Metal Catalyst for Selective Catalytic Reduction of NOx at Low Temperature

The method of selective catalytic reduction (SCR) to removal NOx is very mature. However, its initial investment and operation cost are still high, which limits the development of SCR technology. Low temperature SCR catalysts can significantly reduce the cost. Catalyst active component and its carrier is the key to the efficiency of denitration. This paper summarizes the research progress of noble metal catalyst of low temperature SCR.

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Review of Researches on SCR Catalyst with Low Temperature and high Sulfur Tolerance and Theoretical Design

E3S Web of Conferences ◽

10.1051/e3sconf/202021301012 ◽

2020 ◽

Vol 213 ◽

pp. 01012

Author(s):

Yufei Zhang

Keyword(s):

Low Temperature ◽

Metal Oxide ◽

Selective Catalytic Reduction ◽

Catalytic Reduction ◽

Oxide Catalysts ◽

Research Progress ◽

Metal Oxide Catalysts ◽

Sulfur Tolerance ◽

Scr Catalysts ◽

Low Temperature Scr

Selective catalytic reduction (SCR) of nitrogen oxides (NOx) using ammonia (NH3) is currently the main technology for flue gas denitration. However, the currently widely used commercial catalysts (such as V2O5-WO3 / TiO2, V2O5-MoO3 / TiO2, etc.) have the disadvantages of high operating temperature, narrow active temperature window, and high catalytic cost. Therefore, in recent years, researchers have devoted themselves to the development of low-cost and efficient low-temperature SCR catalytic materials. This paper summarizes the research progress of low-temperature (less than 250 °C) selective catalytic reduction of NOx by unsupported metal oxide catalysts, supported metal oxide catalysts, precious metals, and molecular sieve catalysts. Among them, manganese-based catalysts show good low-temperature selectivity and stability, and have good application prospects. Finally, the research directions of manganese low temperature SCR catalysts are prospected and theoretically designed based on the existing problems.

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Study on Metal Oxide Catalyst for Selective Catalytic Reduction of NOx at Low Temperature

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.448-453.874 ◽

2013 ◽

Vol 448-453 ◽

pp. 874-880

Author(s):

Xiang Gou ◽

Kai Zhang ◽

Lian Sheng Liu ◽

Wen Yong Liu ◽

Zi Fang Wang ◽

...

Keyword(s):

Low Temperature ◽

Metal Oxide ◽

Selective Catalytic Reduction ◽

Oxide Catalyst ◽

Catalytic Reduction ◽

Research Work ◽

Research Progress ◽

Future Research ◽

Metal Oxide Catalyst ◽

Low Temperature Scr

The method of selective catalytic reduction (SCR) is now one of the mature applications of NOx removal technology, which can meet the practical requirements due to the more stringent laws and regulations on air pollutions. However, the active temperature of traditional SCR catalyst is usually in the temperature range of 300-400°C, which limits the condition of SCR unit. Therefore, low temperature SCR method has caused concern for the scholars in recent years. Catalyst is the key to SCR unit because its performance has a direct influence on the catalytic efficiency. This paper summarizes the research progress of metal oxide catalyst of low temperature SCR. In addition, the future research work is discussed.

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Study on Carbon Catalyst for Selective Catalytic Reduction of NOx at Low Temperature

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.448-453.868 ◽

2013 ◽

Vol 448-453 ◽

pp. 868-873

Author(s):

Xiang Gou ◽

Kai Zhang ◽

Lian Sheng Liu ◽

Wen Yong Liu ◽

Zi Fang Wang ◽

...

Keyword(s):

Low Temperature ◽

Selective Catalytic Reduction ◽

Catalytic Reduction ◽

Catalyst Activity ◽

Research Work ◽

Research Progress ◽

Future Research ◽

Carbon Catalyst ◽

Removal Technology ◽

Low Temperature Scr

The method of selective catalytic reduction (SCR) is now one of the mature applications of NOx removal technology, which has the higher denitration rate, less secondary pollution and lower cost. However, the active temperature of traditional SCR catalyst is usually in the temperature range of 300-400°C. This kind of installation leads to the reduction of catalyst activity, and the shortage of working life. The development of efficient and stable performance of catalyst at low temperature has become a key point in the research of SCR.This paper reviews the research progress of carbon catalyst of low temperature SCR. In addition, the future research work is discussed.

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Study on Molecular Sieve Catalyst for Selective Catalytic Reduction of Nox at Low Temperature

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.448-453.881 ◽

2013 ◽

Vol 448-453 ◽

pp. 881-884

Author(s):

Xiang Gou ◽

Kai Zhang ◽

Lian Sheng Liu ◽

Wen Yong Liu ◽

Zi Fang Wang ◽

...

Keyword(s):

Low Temperature ◽

Selective Catalytic Reduction ◽

Molecular Sieve ◽

Catalytic Reduction ◽

Research Progress ◽

Reduction Of Nox ◽

Control Devices ◽

Particulate Control ◽

Low Temperature Scr

Low temperature SCR method has caused concern for the scholars in recent years. This SCR unit can be installed downstream of the desulfurization and particulate control devices, which is conducive to match the existing boiler system. It can relief the poisoning and blocking of SO2 and dust, so as to extend the life of catalyst. This paper summarizes the research progress of molecular sieve catalyst of low temperature SCR.

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DeNOx of Nano-Catalyst of Selective Catalytic Reduction Using Active Carbon Loading MnOx-Cu at Low Temperature

Catalysts ◽

10.3390/catal10010135 ◽

2020 ◽

Vol 10 (1) ◽

pp. 135 ◽

Cited By ~ 3

Author(s):

Tao Zhu ◽

Xing Zhang ◽

Wenjing Bian ◽

Yiwei Han ◽

Tongshen Liu ◽

...

Keyword(s):

Low Temperature ◽

Selective Catalytic Reduction ◽

Reaction Temperature ◽

Catalytic Reduction ◽

Reaction Conditions ◽

Nano Catalyst ◽

Scr Catalysts ◽

Loading Amount ◽

Low Temperature Scr ◽

Carbon Loading

With the improvement of environmental protection standards, selective catalytic reduction (SCR) has become the mainstream technology of flue gas deNOx. Especially, the low-temperature SCR nano-catalyst has attracted more and more attention at home and abroad because of its potential performance and economy in industrial applications. In this paper, low-temperature SCR catalysts were prepared using the activated carbon loading MnOx-Cu. Then, the catalysts were packed into the fiedbed stainless steel micro-reactor to evaluate the selective catalytic reduction of NO performance. The influence of reaction conditions was investigated on the catalytic reaction, including the MnOx-Cu loading amount, calcination and reaction temperature, etc. The experimental results indicate that SCR catalysts show the highest catalytic activity for NO conversion when the calcination temperature is 350 °C, MnOx loading amount is 5%, Cu loading amount is 3%, and reaction temperature is 200 °C. Under such conditions, the NO conversion arrives at 96.82% and the selectivity to N2 is almost 99%. It is of great significance to investigate the influence of reaction conditions in order to provide references for industrial application.

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Fe and Mn mixed oxide catalysts supported on Sn-modified TiO2 for the selective catalytic reduction of NO with NH3 at low temperature

New Journal of Chemistry ◽

10.1039/d1nj05290j ◽

2022 ◽

Author(s):

Zhitao Han ◽

Huan Du ◽

Duo Xu ◽

Yu Gao ◽

Shaolong Yang ◽

...

Keyword(s):

Low Temperature ◽

Selective Catalytic Reduction ◽

Mixed Oxide ◽

Catalytic Reduction ◽

Oxide Catalysts ◽

Reduction Of No ◽

Sn Doping ◽

Mixed Oxide Catalysts ◽

Fe And Mn ◽

Low Temperature Scr

FeMn/SnxTiO2 catalysts were synthesized by introducing Sn as an additive to modify TiO2 supports, and the Sn doping could improve the SO2 tolerance and low-temperature SCR activity significantly.

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