V2O5-WO3/TiO2 Catalysts for Low Temperature NH3 SCR: Catalytic Activity and Characterization

A systematic investigation of the effect of WO3 loading over V2O5/TiO2 catalysts was carried out for the selective catalytic reduction of NO by NH3. The characteristics were examined use BET surface area , X-ray diffractometry (XRD) , Temperature programmed desorption (TPD) of NH3 . It was fund that the WO3 species could interact with the TiO2 anatase phase to exhibits a high activity. With increasing WO3 content ,the activity of V-W/TiO2 for the selective catalytic reduction of NO by NH3 was improved at low temperatures in the range of 3～7%. The results showed that the adding of WO3 to V2O5/TiO2 could result in exposing acid sites of catalysts doped WO3 at low temperature. Furthermore, especially the catalytic activity of VW7Ti showed higher than 80% at 180 °C. However, the catalytic BET surface area and the mass of acid sites not play a leading role for improving low-temperature activity of VWTi in this paper.

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Modification of Nano Spherical-Like MnOx/TiO2 Catalysts with F-Doped

Materials Science Forum ◽

10.4028/www.scientific.net/msf.898.1896 ◽

2017 ◽

Vol 898 ◽

pp. 1896-1904

Author(s):

Jun Lin Xie ◽

Feng Xiang Li ◽

Hai Feng Cui ◽

Feng He ◽

Kai Qi

Keyword(s):

Catalytic Activity ◽

Low Temperature ◽

Selective Catalytic Reduction ◽

Spherical Particle ◽

Surface Area ◽

Catalytic Reduction ◽

Sol Gel ◽

Acid Sites ◽

Scr Of No ◽

Structures And Properties

A series of spherical-like MnOx/TiO2 catalysts with F-doped were prepared by using sol-gel method and investigated for low-temperature selective catalytic reduction (SCR) of NOx with NH3 at the temperature ranging from 100 °C to 200 °C. The 0.07Ce-MnOx/TiO2 catalyst shows the highest activity and yields 95% NO conversion at 200 °C. With the help of XRD, TGA, H2-TPR, NH3-TPD, BET and TEM, the structures and properties of the catalysts were characterized. The results show that it is a fine modifier for TiO2 support with appropriate amounts of F doping, and F ions can enter into TiO2 lattice, reducing the formation of rutile TiO2 and the crystallization of MnOx. However, MnTiO3 was generated in the catalysts with excess F doping. This would cause larger diameter of spherical particle and smaller surface area. But the amounts of the surface acid sites increased, and the reduction ability of catalysts was enhanced, which is beneficial for catalytic activity of the catalysts.

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Improvement of low-temperature catalytic activity over hierarchical Fe-Beta catalysts for selective catalytic reduction of NO with NH3

Chinese Chemical Letters ◽

10.1016/j.cclet.2019.03.011 ◽

2019 ◽

Vol 30 (4) ◽

pp. 867-870 ◽

Cited By ~ 9

Author(s):

Na Zhu ◽

Zhihua Lian ◽

Yan Zhang ◽

Wenpo Shan ◽

Hong He

Keyword(s):

Catalytic Activity ◽

Low Temperature ◽

Selective Catalytic Reduction ◽

Catalytic Reduction ◽

Reduction Of No

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Insights into the promotion role of phosphorus doping on carbon as a metal-free catalyst for low-temperature selective catalytic reduction of NO with NH3

RSC Advances ◽

10.1039/d0ra01654c ◽

2020 ◽

Vol 10 (22) ◽

pp. 12908-12919

Author(s):

Weifeng Li ◽

Shuangling Jin ◽

Rui Zhang ◽

Yabin Wei ◽

Jiangcan Wang ◽

...

Keyword(s):

Catalytic Activity ◽

Low Temperature ◽

Selective Catalytic Reduction ◽

No Reduction ◽

Catalytic Reduction ◽

Carbon Aerogels ◽

Phosphorus Doping ◽

Reduction Of No ◽

Metal Free

P species can effectively enhance the catalytic activity of carbon aerogels for NO reduction at low temperature.

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Low Temperature Selective Catalytic Reduction of NO on CeO2-Fe3O4/TiO2,CeO2 /TiO2 Catalysts Prepared by Coprecipitation Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.960-961.234 ◽

2014 ◽

Vol 960-961 ◽

pp. 234-239 ◽

Cited By ~ 3

Author(s):

Wen Long Zhen ◽

Rui Tang Guo ◽

Wei Guo Pan

Keyword(s):

Low Temperature ◽

Adsorption Capacity ◽

Selective Catalytic Reduction ◽

Surface Area ◽

Catalytic Reduction ◽

Coprecipitation Method ◽

High Concentration ◽

Excellent Performance ◽

Reduction Of No ◽

Chemisorbed Oxygen

CeO2-Fe3O4/TiO2and CeO2/TiO2catalysts were prepared by coprecipitation method, and their activities for selective catalytic reduction of NO with NH3were investigated. As can be seen from the experimental results, the CeO2-Fe3O4/TiO2catalyst prepared showed the best SCR activity and SO2resistance. Based on the characterization results of BET, XRD, NH3-TPD and XPS the excellent performance of CeO2-Fe3O4/TiO2catalyst should be resulted from its large surface area, high NH3adsorption capacity and high concentration of surface chemisorbed oxygen.

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Enhanced catalytic activity over MIL-100(Fe) loaded ceria catalysts for the selective catalytic reduction of NO x with NH 3 at low temperature

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2015.09.024 ◽

2016 ◽

Vol 301 ◽

pp. 512-521 ◽

Cited By ~ 37

Author(s):

Peng Wang ◽

Hong Sun ◽

Xie Quan ◽

Shuo Chen

Keyword(s):

Catalytic Activity ◽

Low Temperature ◽

Selective Catalytic Reduction ◽

Catalytic Reduction ◽

Reduction Of No ◽

Ceria Catalysts

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Improved catalytic activity and N2 selectivity of Fe–Mn–O x catalyst for selective catalytic reduction of NO by NH3 at low temperature

Research on Chemical Intermediates ◽

10.1007/s11164-018-3255-x ◽

2018 ◽

Vol 44 (4) ◽

pp. 2703-2717 ◽

Cited By ~ 12

Author(s):

Futing Xia ◽

Zhongxian Song ◽

Xin Liu ◽

Xi Liu ◽

Yinhua Yang ◽

...

Keyword(s):

Catalytic Activity ◽

Low Temperature ◽

Selective Catalytic Reduction ◽

Catalytic Reduction ◽

Reduction Of No

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Effect of Preparation Methods on Ti-PILCs Catalysts in Selective Catalytic Reduction of NO by Propylene

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1033-1034.90 ◽

2014 ◽

Vol 1033-1034 ◽

pp. 90-94 ◽

Cited By ~ 1

Author(s):

Qi Ying Wang ◽

Zi Li Liu ◽

Jun Rong Wu

Keyword(s):

Catalytic Activity ◽

Selective Catalytic Reduction ◽

Catalytic Reduction ◽

Active Species ◽

Bet Surface Area ◽

High Catalytic Activity ◽

Incipient Wetness Impregnation ◽

Distribution Analysis ◽

Preparation Methods ◽

Reduction Of No

Different Cu-loading pillared clays catalysts were studied in selective catalytic reduction of NO by propylene. The catalyst prepared by incipient wetness impregnation (Cu/Ti-PILCs) had better catalytic activity and stability than that prepared by ion-exchanged method (Cu-Ti-PILCs). Cu/Ti-PILCs has higher BET surface area than Cu-Ti-PILCs. Pore size distribution analysis and XRD showed that Cu species dispersed well in Cu/Ti-PILCs but formed conglomeration in Cu-Ti-PILCs. TPR showed that Cu2+ species were the main active species on the Cu/Ti-PILCs, which was responsible for the high catalytic activity of catalyst.

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The Effect of Iron Doping on the Performance of Mn/TiO2 Catalysts for NO Reduction with NH3 at Low Temperature

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.864-867.1415 ◽

2013 ◽

Vol 864-867 ◽

pp. 1415-1420

Author(s):

Jie Nan Hong ◽

Wei Guo Pan ◽

Rui Tang Guo ◽

Wen Long Zhen ◽

Yue Liang Yu ◽

...

Keyword(s):

Catalytic Activity ◽

Low Temperature ◽

No Reduction ◽

Catalytic Reduction ◽

Poor Performance ◽

Acid Sites ◽

Iron Doping ◽

Reduction Of No ◽

Catalysts For No Reduction ◽

Redox Ability

The catalysts of Mn/TiO2, Fe/TiO2and Mn-Fe/TiO2prepared by coprecipitation method were investigated for low temperature selective catalytic reduction of NO with NH3. The catalytic activity and SO2resistance of these three catalysts were tested and the properties of the catalysts were characterized by using N2-BET, XRD, H2-TPR, NH3-TPD methods. It was found that the doping of iron reduced the catalytic activity of Mn/TiO2catalyst at low temperature and also has an adverse effect for its SO2resistance at the same time. The decrease of surface area , redox ability and surface acid sites caused by doping of iron might be the main reasons for poor performance of this catalyst.

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