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

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.

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

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.

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

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.

Exposed metal oxide active sites on mesoporous titania channels: a promising design for low-temperature selective catalytic reduction of NO with NH3

2018 ◽  
Vol 54 (30) ◽  
pp. 3783-3786 ◽  
Author(s):  
Jianwei Fan ◽  
Menghua Lv ◽  
Wei Luo ◽  
Xianqiang Ran ◽  
Yonghui Deng ◽  
...  
Keyword(s):  
Low Temperature ◽  
Metal Oxide ◽  
Selective Catalytic Reduction ◽  
Active Sites ◽  
Catalytic Reduction ◽  
Mesoporous Titania ◽  
Active Centers ◽  
Reduction Of No ◽  
Low Temperature Scr

A subtle catalyst is designed with CuO and MnO2 active centers on the surface of mesoporous titania for low-temperature SCR.

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

2013 ◽  
Vol 448-453 ◽  
pp. 885-889
Author(s):  
Xiang Gou ◽  
Kai Zhang ◽  
Lian Sheng Liu ◽  
Wen Yong Liu ◽  
Zi Fang Wang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Noble Metal ◽  
Catalytic Reduction ◽  
Research Progress ◽  
Metal Catalyst ◽  
Noble Metal Catalyst ◽  
Scr Catalysts ◽  
Low Temperature Scr ◽  
The Cost

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.

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

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.

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

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.

Research Progress of Low-Temperature SCR DeNOx Catalysts

2013 ◽  
Vol 320 ◽  
pp. 629-638 ◽  
Author(s):  
Yun Sang Feng ◽  
Shao Guang Liu ◽  
Cheng Wu Chen ◽  
He Yong Zhao ◽  
Yu Song Xu
Keyword(s):  
Low Temperature ◽  
Active Sites ◽  
Noble Metals ◽  
Research Progress ◽  
Future Research ◽  
Affecting Factors ◽  
Medium Temperature ◽  
Denox Catalysts ◽  
Temperature Activation ◽  
Low Temperature Scr

Low-temperature SCR DeNOx process is considered to be a potential technique to meet the stringent environment regulations. It can avoid the problem such as blocking and eroding often generated in medium temperature, polluting and poisoning caused by alkali elements and so on. In this paper, a review of DeNOx catalysts about noble metals, molecular sieve, carbon-based and metal oxides catalyst was presented. The affecting factors of the low-temperature activation were comprehensively expounded, such as precursor introduction method, preparation method, supporter pretreatment and catalyst structure. Then mechanism of SO2 poisoning and effect of active compositions were analyzed. The dual effect of SO2 on the activity of low temperature catalysts mainly results from the formation of certain sulfur-containing species on catalyst surface. Water vapor decreased the number of available active sites attributed to competitive adsorption among H2O and other reactants. Moreover, the co-existence of H2O and SO2 resulted in the decrease of activity obviously. So the way to improve resistance of SO2 and H2O poisoning was summed up. Finally, future research and development directions in the developing low-temperature SCR for removal of NOx technology were proposed.

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