Fabrication of Spinel-Type PdxCo3–xO4 Binary Active Sites on 3D Ordered Meso-macroporous Ce-Zr-O2 with Enhanced Activity for Catalytic Soot Oxidation

ACS Catalysis ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 7915-7930 ◽  
Author(s):  
Jing Xiong ◽  
Qiangqiang Wu ◽  
Xuelei Mei ◽  
Jian Liu ◽  
Yuechang Wei ◽  
...  
Keyword(s):  
Active Sites ◽  
Soot Oxidation ◽  
Spinel Type ◽  
Enhanced Activity ◽  
Catalytic Soot Oxidation

scholarly journals Study on Catalytic Soot Oxidation over Spinel Type ACo2O4 (A = Co, Ni, Cu, Zn) Catalysts

2017 ◽  
Vol 17 (9) ◽  
pp. 2317-2327 ◽  
Author(s):  
Shuo Zhang ◽  
Xinbo Zhu ◽  
Chenghang Zheng ◽  
Daqing Hu ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Soot Oxidation ◽  
Spinel Type ◽  
Catalytic Soot Oxidation

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

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.

Impact of Diesel/CNG Dual-Fuel Combustion on Exhaust Soot Characteristics

2016 ◽  
Author(s):  
Karthik Nithyanandan ◽  
Yilu Lin ◽  
Robert Donahue ◽  
Xiangyu Meng ◽  
Yuanxu Li ◽  
...  
Keyword(s):  
Active Sites ◽  
Particle Diameter ◽  
Soot Oxidation ◽  
Fuel Combustion ◽  
Operating Conditions ◽  
Intake Manifold ◽  
Dual Fuel ◽  
Exhaust Pipe ◽  
Oxidation Reactivity ◽  
Dual Fuel Combustion

This paper presents the chemical composition, oxidation reactivity and nanostructural characteristics of particulate matter (PM) produced by a diesel engine operating with diesel/compressed natural gas (CNG) dual-fuel combustion. Raw, undiluted soot samples from pure diesel, 40% CNG, and 70% CNG (energy-based substitution rate) combustion were collected from the exhaust pipe. Engine operating conditions were held at 1200 RPM and 20 mg/cycle baseline load. For dual-fuel operation, split diesel injection (two injections) was used as the pilot, and CNG was injected into the intake manifold. First, soot oxidation reactivity was characterized using thermogravimetric analysis (TGA). Carbon, hydrogen, and nitrogen weight fractions were obtained using elemental analysis to measure soot aging. Transmission electron microscopy (TEM) was then used to determine the diameter of the spherules, and the morphology of soot agglomerates. It was found that soot reactivity increased with increasing CNG content. TEM images revealed a higher variation in particle diameter with increasing CNG substitution. High resolution TEM (HRTEM) images showed that CNG70 soot displayed features of immature soot particles. The enhanced reactivity could also be due to more active sites available in CNG soot, as well as the CNG soot being immature. Under this test condition and engine configuration, it can be concluded that the use of CNG affects the morphology and nanostructure of PM, and hence the oxidation reactivity of the soot.

Sign in / Sign up

Export Citation Format

Share Document