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.

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.

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.

Investigation of Cu Species in CuBTC: Active Sites for Selective Catalytic Reduction of NO with NH3

2015 ◽  
Vol 1118 ◽  
pp. 133-141 ◽  
Author(s):  
Chun Yan Li ◽  
Yong Shi ◽  
Hao Zhang ◽  
Fang Hong Xue
Keyword(s):  
Low Temperature ◽  
High Activity ◽  
Selective Catalytic Reduction ◽  
Active Sites ◽  
Catalytic Reduction ◽  
Metal Organic Frameworks ◽  
Activity Data ◽  
Metal Centers ◽  
Reduction Of No ◽  
Metal Organic

The classical metal-organic Frameworks CuBTC showed remarkable low temperature activity in selective catalytic reduction of NO with NH3 (NH3-SCR). It was found the conversion of NO can reach as high as 100% in the range 210-300 °C on the activated sample. The nature of the active Cu species among CuBTC in NH3-SCR based on the activity data were characterized by TEM, XPS, XRD, EPR and IR. This high activity is not only due to the unsaturated metal centers of the frameworks, but also to the presence of high-dispersed Cu2O particles. Both Cu2+ and Cu+ species are the active sites for NH3-SCR.

scholarly journals Insight into the synergism between MnO2 and acid sites over Mn–SiO2@TiO2 nano-cups for low-temperature selective catalytic reduction of NO with NH3

RSC Advances ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 1979-1986 ◽  
Author(s):  
Siyi Zheng ◽  
Lei Song ◽  
Siyang Tang ◽  
Changjun Liu ◽  
Hairong Yue ◽  
...  
Keyword(s):  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Acid Sites ◽  
Reduction Of No ◽  
Low Temperature Scr ◽  
Insight Into

A novel Mn–SiO2@TiO2 nano-cup catalyst with synergy of MnO2 and acid sites for efficient low-temperature SCR reaction.

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.

scholarly journals SO2Poisoning Behaviors of Ca-Mn/TiO2Catalysts for Selective Catalytic Reduction of NO with NH3at Low Temperature

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Qingqing Tian ◽  
Hongfeng Liu ◽  
Weiyuan Yao ◽  
Yan Wang ◽  
Yue Liu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Analytical Techniques ◽  
Active Phase ◽  
Experimental Results ◽  
Sulfur Tolerance ◽  
Reduction Of No ◽  
Low Temperature Scr

The sulfur tolerance of Ca modifiedMnOx/TiO2catalysts in low-temperature SCR process was investigated. Experimental results revealed that the durability of developed catalysts in the presence of SO2could be improved by Ca modification. After being subjected to a range of analytical techniques, it was found that the surface Ca species could act as a SO2trap by preferentially reacting with SO2to form bulk-like CaSO4, inhibiting the sulfation of active phase. Furthermore, the introduction of SO2had also preserved part of Lewis sites over theMnOx.Both of these are conducive to NH3adsorption and activation at low temperature, hence improving the sulfur tolerance of Ca doped catalysts.

Effect of Fe on the Selective Catalytic Reduction of NO by NH3 at Low Temperature over Mn/CeO2-TiO2 Catalyst

2012 ◽  
Vol 27 (5) ◽  
pp. 495-500 ◽  
Author(s):  
Da-Wang WU ◽  
Qiu-Lin ZHANG ◽  
Tao LIN ◽  
Mao-Chu GONG ◽  
Yao-Qiang CHEN
Keyword(s):  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Reduction Of No
Sign in / Sign up

Export Citation Format

Share Document