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

Lee, Eun Jun; Kim, Min June; Choung, Jin Woo; Kim, Chang Hwan; Lee, Kwan Young

doi:10.1016/j.apcata.2021.118396

Cited by 15 publications

(4 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An absorption peak attributed to N 2 O 4 (1360 cm −1 ) appears. 52 Due to the strong adsorption of NO x , a large number of chelated bidentate nitrates are produced. However, the bidentate nitrate cannot generate N 2 O 4 with the increase of temperature, thus inhibiting the generation of N 2 O 4 .…”

Section: Resultsmentioning

confidence: 99%

Three-dimensional ordered macroporous cerium–manganese composite oxide for NO oxidation

Qu,

Wang,

et al. 2023

Catal. Sci. Technol.

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

Three-dimensional ordered macroporous cerium–manganese composite oxide for NO oxidation

Qu,

Wang,

et al. 2023

Catal. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…NO oxidization to NO 2 gets accelerated in the vicinity of Pt containing catalysts present on the surface of the CRT. Since Ag/CeO 2 has been widely used in scrutinizing soot oxidation properties, Lee et al 272 introduced Mn into this catalyst and performed NO x assisted soot oxidation studies. The Ag/ 2MnO x−1 CeO 2 catalyst improved the T 50 to 391 °C in comparison to Ag/CeO 2 having a T 50 of 400 °C.…”

Section: Hc-scrmentioning

confidence: 99%

Advancements in In-Cylinder and After-Treatment Strategies for Mitigating Pollutants from Diesel Engines: A Critical Review

Da Costa,

Bukkarapu,

Fernandes

et al. 2024

Energy Fuels

View full text Add to dashboard Cite

Although diesel after-treatment techniques demonstrate a substantial decrease in tailpipe emissions, the primary goal continues to be attaining nearly zero emissions to comply with current regulatory requirements and foreseeable imminent rigorous regulations. To achieve this objective, engine combustion systems and fuel formulations require fine-tuning. Taking insights from the recent literature, this review examines various processes, including homogeneous in situ methods, the incorporation of fuel-borne catalysts, and the use of biofuels. Despite progress in in-cylinder pollution mitigation techniques like low-temperature combustion, which exhibits substantial reductions in oxides of nitrogen (NO x ) and soot emissions, it is crucial to consistently advance technology to conform to evolving emission regulations and environmental concerns. A discussion is presented regarding the advantages and disadvantages of the homogeneous charge compression ignition (HCCI) mode and their potential for the future, focusing on biodiesel-fueled HCCI engines. The review assesses the effectiveness of thermal management strategies and engine design modifications that extend the operational range of HCCI engines powered by biodiesel in light of the inherent limitation of a restricted engine operating range. The review critically examines the merits and demerits of biofuels and HCCI systems and provides an essential analysis of current after-treatment approaches. With an imperative focus, the primary aim of this review is to ascertain modern catalysts designed explicitly for use in contemporary combustion systems. An exhaustive examination of the progress made in diesel oxidation catalysts, selective catalytic reduction techniques, lean NO x traps, diesel particulate filters, and catalyst regeneration is presented. The concluding remarks analyze the catalytic characteristics necessary for smooth incorporation with modern technological developments in various combustion systems.

show abstract

“…Ag is effective in soot oxidation for the removal of diesel exhaust gas, as demonstrated by a wide range of studies on Ag-supported MnO2-CeO2, Al2O3 and LaCoO3, or Ag-doped LaMnO3 [17][18][19][20][21]. A series of Mn1−xAgxCo2O4 spinel-type catalysts was prepared by an auto-combustion method in this study.…”

Section: Introductionmentioning

confidence: 98%

Auto-Combustion Synthesis of Mn1−xAgxCo2O4 Catalysts for Diesel Soot Combustion

Liu¹,

Chen²,

Han³

et al. 2022

Catalysts

View full text Add to dashboard Cite

The increase in diesel consumption has led to the proliferation of soot particles from diesel exhaust, resulting in pollution in the form of smog. To solve this problem, a series of Ag-doped Mn1−−xAgxCo2O4 spinel catalysts were successfully prepared using an auto-combustion synthesis method that uses glucose as a fuel. X-ray diffraction and Fourier transform infrared spectroscopy analysis were used to analyse the phase structure of the as-prepared samples. The results reveal that the selected catalysts featured a spinel-type structure. Moreover, the catalytic activity of the catalysts for soot combustion was evaluated by temperature-programmed reaction analysis. The temperature required for soot combustion depended heavily on the Ag concentration in the Mn1−xAgxCo2O4 catalyst. The Mn0.8Ag0.2Co2O4 catalyst had a superior catalytic activity with a T90 of 399 °C and CO2 selectivity of 99.3%.

show abstract

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

Cited by 15 publications

References 62 publications

Three-dimensional ordered macroporous cerium–manganese composite oxide for NO oxidation

Three-dimensional ordered macroporous cerium–manganese composite oxide for NO oxidation

Advancements in In-Cylinder and After-Treatment Strategies for Mitigating Pollutants from Diesel Engines: A Critical Review

Auto-Combustion Synthesis of Mn1−xAgxCo2O4 Catalysts for Diesel Soot Combustion

Contact Info

Product

Resources

About