Catalytic Soot Oxidation Using Ceria, Cobalt And Copper Nanocomposites

MRS Advances ◽  
2018 ◽  
Vol 3 (42-43) ◽  
pp. 2581-2588
Author(s):  
EUBERT P. MAHOFA ◽  
TUMMA BALA NARSAIAH ◽  
CHIDURALA SHILPA CHAKRA
Keyword(s):  
Catalytic Efficiency ◽  
Soot Oxidation ◽  
Ammonia Solution ◽  
Catalyst Characterization ◽  
X Ray Diffraction ◽  
Oxidation Activity ◽  
Thermal Analyzer ◽  
Co Precipitation ◽  
Soot Oxidation Activity ◽  
Soot Catalytic Combustion

ABSTRACTNanosized CeO2-CuO (CeCu, 2:1) and CeO2-CoO (CeCo, 2:1) were synthesized by co-precipitation from nitrate precursors using 25% ammonia solution (NH4OH) as the precipitating agent. The catalysts were calcined in air at 800°C for 4h to evaluate the thermal stability. Powder x-ray diffraction (XRD) and Dynamic Light Scattering (DLS) techniques were used for catalyst characterization. A Thermo Gravimetric/Differential Thermal Analyzer (TG/DTA) was used to determine the catalytic efficiency and soot oxidation activity. Ce-composite nanoparticles heightens the redox properties of the catalyst relative to undoped ceria. The Ce-composite samples exhibited excellent soot catalytic combustion performance by decreasing activation energy of soot oxidation.

Iron Doped Lanthanum Stannate Pyrochlores (La2Sn2-XFeXO7) for the Simultaneous Catalytic Removal NOx and Soot

2011 ◽  
Vol 306-307 ◽  
pp. 1468-1472 ◽  
Author(s):  
Zhong Peng Wang ◽  
Zi Zi Wang ◽  
Xiao Wang ◽  
Qian Li ◽  
Zong Gang Mu ◽  
...  
Keyword(s):  
Soot Oxidation ◽  
Redox Properties ◽  
Precipitation Method ◽  
Oxidation Activity ◽  
Structure Defects ◽  
Constant Ph ◽  
High Maximum ◽  
Co Precipitation ◽  
Catalytic Removal ◽  
Soot Oxidation Activity

A series of La2Sn2-xFexO7 (x=0, 0.2, 0.6, 1.0, 1.4, 1.8, 2.0) catalysts were prepared by a constant pH co-precipitation method, and their catalytic activity was investigated for simultaneous removal of NOx and soot. The incorporation of Fe strongly influences the crystal phase composition, surface area and redox properties of the catalysts. All the catalysts displayed soot oxidation activity with nearly 100% selectivity towards CO2. The doped solids exhibit higher activities than the undoped one, which may be related to the enhancement of reducibility derived from structure defects induced by doping. LSF0.6 may be a good catalyst with high soot oxidation activity (Ti = 334 °C) and a high maximum productivity of N2 (PN2= 12.4%).

Soot Oxidation Activity of Redox and Non-Redox Metal Oxides Synthesised by EDTA–Citrate Method

2017 ◽  
Vol 147 (12) ◽  
pp. 3004-3016 ◽  
Author(s):  
Anjana P. Anantharaman ◽  
Hari Prasad Dasari ◽  
Jong-Ho Lee ◽  
Harshini Dasari ◽  
G. Uday Bhaskar Babu
Keyword(s):  
Metal Oxides ◽  
Soot Oxidation ◽  
Oxidation Activity ◽  
Citrate Method ◽  
Soot Oxidation Activity

Highly enhanced soot oxidation activity over 3DOM Co3O4-CeO2 catalysts by synergistic promoting effect

2019 ◽  
Vol 363 ◽  
pp. 214-226 ◽  
Author(s):  
Guangjun Zhai ◽  
Jinguo Wang ◽  
Zimei Chen ◽  
Shuaifeng Yang ◽  
Yong Men
Keyword(s):  
Soot Oxidation ◽  
Promoting Effect ◽  
Oxidation Activity ◽  
Soot Oxidation Activity

Effect of Ag loading on praseodymium doped ceria catalyst for soot oxidation activity

2022 ◽  
Author(s):  
Pandurangappa Govardhan ◽  
Anjana Payyalore Anantharaman ◽  
Sunaina Shivasharanappa Patil ◽  
Hari Prasad Dasari ◽  
Harshini Dasari ◽  
...  
Keyword(s):  
Soot Oxidation ◽  
Doped Ceria ◽  
Oxidation Activity ◽  
Soot Oxidation Activity

Promotional effect of nickel addition on soot oxidation activity of Ce0.9Pr0.1O2 oxide catalysts

2020 ◽  
Vol 74 (12) ◽  
pp. 4581-4592
Author(s):  
Kirti Rajvanshi ◽  
Sunaina S. Patil ◽  
Lakhanlal ◽  
Hari Prasad Dasari ◽  
M. B. Saidutta ◽  
...  
Keyword(s):  
Soot Oxidation ◽  
Oxide Catalysts ◽  
Oxidation Activity ◽  
Promotional Effect ◽  
Nickel Addition ◽  
Soot Oxidation Activity

Deposition of Potassium Salts on Soot Oxidation Activity of Cu-SSZ-13 as a SCRF Catalyst: Laboratory Study

2020 ◽  
Vol 24 (3) ◽  
pp. 250-258 ◽  
Author(s):  
Liping Liu ◽  
Xiaodong Wu ◽  
Yue Ma ◽  
Rui Ran ◽  
Zhichun Si ◽  
...  
Keyword(s):  
Laboratory Study ◽  
Soot Oxidation ◽  
Potassium Salts ◽  
Oxidation Activity ◽  
Soot Oxidation Activity

Preparation and NO x -assisted soot oxidation activity of a CuO–CeO 2 mixed oxide catalyst

2015 ◽  
Vol 135 ◽  
pp. 294-300 ◽  
Author(s):  
Yujie Wang ◽  
Jihui Wang ◽  
Hong Chen ◽  
Mingfa Yao ◽  
Yongdan Li
Keyword(s):  
Mixed Oxide ◽  
Oxide Catalyst ◽  
Soot Oxidation ◽  
Oxidation Activity ◽  
Mixed Oxide Catalyst ◽  
Soot Oxidation Activity

scholarly journals Influence of the Preparation Method of Ag-K/CeO2-ZrO2-Al2O3 Catalysts on Their Structure and Activity for the Simultaneous Removal of Soot and NOx

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 294 ◽  
Author(s):  
Anna Cooper ◽  
Thomas E. Davies ◽  
David J. Morgan ◽  
Stan Golunski ◽  
Stuart H. Taylor
Keyword(s):  
Preparation Method ◽  
Catalyst Activity ◽  
Chemical Vapor ◽  
Soot Oxidation ◽  
Simultaneous Removal ◽  
Oxidation Activity ◽  
Wet Impregnation ◽  
Incipient Wetness ◽  
The Difference ◽  
Soot Oxidation Activity

Ag/CeO2-ZrO2-Al2O3, a known catalyst for the simultaneous removal of NOx and soot, was modified by the addition of K, and was prepared using various techniques: wet impregnation, incipient wetness, and chemical vapor impregnation at different temperatures. The effect of the preparation method on catalyst activity was studied. It was found that catalysts prepared via wet impregnation, incipient wetness, and chemical vapor impregnation at 80 °C were able to utilize in situ formed N2O at low temperatures, to simultaneously remove NOx and soot. The difference in preparation method affected the catalyst’s ability to produce and use N2O as an oxidant for soot. The temperature at which chemical vapor impregnation was performed greatly influenced the catalyst’s ability to oxidize soot. The introduction of K to the Ag/CeO2-ZrO2-Al2O3 vastly improved the soot oxidation activity, particularly for the catalyst prepared via wet impregnation. However, the incorporation of K had an adverse effect on the reduction of NOx.

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