Catalytic Soot Oxidation Over Ce- and Cu-Doped Hydrotalcites-Derived Mesoporous Mixed Oxides

2014 ◽  
Vol 14 (9) ◽  
pp. 7087-7096 ◽  
Author(s):  
Zhongpeng Wang ◽  
Liguo Wang ◽  
Fang He ◽  
Zheng Jiang ◽  
Tiancun Xiao ◽  
...  
Keyword(s):  
Mixed Oxides ◽  
Soot Oxidation ◽  
Catalytic Soot Oxidation

scholarly journals Mesoporous manganese oxides for NO2 assisted catalytic soot oxidation

2017 ◽  
Vol 201 ◽  
pp. 543-551 ◽  
Author(s):  
Niluka D. Wasalathanthri ◽  
Thomas M. SantaMaria ◽  
David A. Kriz ◽  
Shanka L. Dissanayake ◽  
Chung-Hao Kuo ◽  
...  
Keyword(s):  
Manganese Oxides ◽  
Soot Oxidation ◽  
Catalytic Soot Oxidation

scholarly journals Visualizing the mobility of silver during catalytic soot oxidation

2016 ◽  
Vol 183 ◽  
pp. 28-36 ◽  
Author(s):  
Diego Gardini ◽  
Jakob M. Christensen ◽  
Christian D. Damsgaard ◽  
Anker D. Jensen ◽  
Jakob B. Wagner
Keyword(s):  
Soot Oxidation ◽  
Catalytic Soot Oxidation

scholarly journals Potential of Ceria-Zirconia-Based Materials in Carbon Soot Oxidation for Gasoline Particulate Filters

Catalysts ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 768
Author(s):  
Eleonora Aneggi ◽  
Alessandro Trovarelli
Keyword(s):  
Oxygen Vacancies ◽  
Mixed Oxides ◽  
Direct Injection ◽  
Soot Oxidation ◽  
Operating Conditions ◽  
Gasoline Direct Injection ◽  
Low Oxygen ◽  
Engine Exhaust ◽  
Partial Pressures ◽  
Carbon Soot

ZrO2 and Ce0.8Zr0.2O2 mixed oxides were prepared and tested in the oxidation of carbon soot at different oxygen partial pressures and degrees of catalyst/soot contact to investigate their activity under typical gasoline direct injection (GDI) operating conditions. Under reductive atmospheres, generation of oxygen vacancies occurs in Ce0.8Zr0.2O2, while no reduction is observed on ZrO2. Both materials can oxidize carbon under high oxygen partial pressures; however, at low oxygen partial pressures, the presence of carbon can contribute to the reduction of the catalyst and formation of oxygen vacancies, which can then be used for soot oxidation, increasing the overall performance. This mechanism is more efficient in Ce0.8Zr0.2O2 than ZrO2, and depends heavily on the interaction and the degree of contact between soot and catalyst. Thus, the ability to form oxygen vacancies at lower temperatures is particularly helpful to oxidize soot at low oxygen partial pressures, and with higher CO2 selectivity under conditions typically found in GDI engine exhaust gases.

Catalytic Soot Oxidation: Effect of Ceria-Zirconia Catalyst Particle Size

2016 ◽  
Vol 9 (3) ◽  
pp. 1709-1719 ◽  
Author(s):  
Athanasios G. Konstandopoulos ◽  
Chrysoula Pagkoura ◽  
Souzana Lorentzou ◽  
Georgia Kastrinaki
Keyword(s):  
Particle Size ◽  
Catalyst Particle ◽  
Soot Oxidation ◽  
Catalyst Particle Size ◽  
Zirconia Catalyst ◽  
Catalytic Soot Oxidation ◽  
Oxidation Effect

scholarly journals Catalytic soot oxidation by Ag/BaCeO3 having tolerance to SO2 poisoning

2009 ◽  
Vol 117 (1371) ◽  
pp. 1153-1157 ◽  
Author(s):  
Keita IKEUE ◽  
Shintaro KOBAYASHI ◽  
Masato MACHIDA
Keyword(s):  
Soot Oxidation ◽  
Catalytic Soot Oxidation

scholarly journals Simulating Real World Soot-Catalyst Contact Conditions for Lab-Scale Catalytic Soot Oxidation Studies

Catalysts ◽  
2018 ◽  
Vol 8 (6) ◽  
pp. 247 ◽  
Author(s):  
Changsheng Su ◽  
Yujun Wang ◽  
Ashok Kumar ◽  
Paul McGinn
Keyword(s):  
Exhaust System ◽  
Soot Oxidation ◽  
Contact Condition ◽  
Particulate Filter ◽  
Contact Conditions ◽  
Soot Deposition ◽  
Diesel Soot Oxidation ◽  
Catalytic Soot Oxidation ◽  
Engine Testing ◽  
Set Up

In diesel soot oxidation studies, both well-defined model soot and a reliable means to simulate realistic contact conditions with catalysts are crucial. This study is the first attempt in the field to establish a lab-scale continuous flame soot deposition method in simulating the “contact condition” of soot and a structured diesel particulate filter (DPF) catalyst. The properties of this flame soot were examined by means of X-ray diffraction (XRD) and transmission electron microscopy (TEM) for structure analysis, Brunauer-Emmett-Teller (BET) for surface area analysis, and thermogravimetric analysis (TGA) for reactivity and kinetics analysis. For validation purposes, catalytic oxidation of Tiki® soot using the simulated contact condition was conducted to compare with the diesel particulates collected from a real diesel engine exhaust system. It was found that the flame soot is more uniform and controllable than similar samples of collected diesel particulates. The change in T50 due to the presence of the catalyst is very similar in both cases, implying that the flame deposit method is able to produce comparably realistic contact conditions to that resulting from the real exhaust system. Comparing against the expensive engine testing, this novel method allows researchers to quickly set up a procedure in the laboratory scale to reveal the catalytic soot oxidation properties in a comparable loose contact condition.

Cu-Mn-Ce mixed oxides catalysts for soot oxidation and their mechanistic chemistry

2020 ◽  
Vol 512 ◽  
pp. 145602 ◽  
Author(s):  
Shafqat Ali ◽  
Xiaodong Wu ◽  
Zareen Zuhra ◽  
Yue Ma ◽  
Yasir Abbas ◽  
...  
Keyword(s):  
Mixed Oxides ◽  
Soot Oxidation

scholarly journals Lattice oxygen activity in ceria-praseodymia mixed oxides for soot oxidation in catalysed Gasoline Particle Filters

2019 ◽  
Vol 245 ◽  
pp. 706-720 ◽  
Author(s):  
J.C. Martínez-Munuera ◽  
M. Zoccoli ◽  
J. Giménez-Mañogil ◽  
A. García-García
Keyword(s):  
Particle Filters ◽  
Mixed Oxides ◽  
Soot Oxidation ◽  
Lattice Oxygen ◽  
Oxygen Activity

NOx-assisted soot oxidation based on Ag/MnOx-CeO2 mixed oxides

2021 ◽  
pp. 118396
Author(s):  
Eun Jun Lee ◽  
Min June Kim ◽  
Jin Woo Choung ◽  
Chang Hwan Kim ◽  
Kwan-Young Lee
Keyword(s):  
Mixed Oxides ◽  
Soot Oxidation
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