Promotional Effects of Sm/Ce/La Doping on Soot Oxidation over MnCo<sub>2</sub>O<sub>4</sub> Spinel Catalysts

Xu, Ke; Zhang, Yan; Shan, Wenpo; He, Hong

doi:10.1021/acs.jpcc.1c07736

Cited by 10 publications

(9 citation statements)

References 62 publications

(91 reference statements)

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“…Spinel, like perovskite, is a transition metal oxide with fixed structure. Spinel has the advantages of low price, simple preparation, good stability, low secondary pollution and strong catalytic activity, which makes it one of the most powerful competitors in CDPF potential catalysts (Xu et al 2021 ). In spinel structure, there are different cations A and B at the junction of tetrahedron and octahedron.…”

Section: Diesel Particulate Filter Regenerationmentioning

confidence: 99%

“…The technology of oxidizing NO in exhaust and increasing exhaust temperature by using DOC is called continuously regenerating trap (CRT) (He et al 2015 ). In addition, the catalyst supported on the fuel or the DPF wall can also reduce the reaction ignition temperature (Stępień et al 2015 ) (Xu et al 2021 ). However, the secondary pollution of ash and nonflammable metal particles generated therefrom is noteworthy.…”

Section: Introductionmentioning

confidence: 99%

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Diesel particulate filter regeneration mechanism of modern automobile engines and methods of reducing PM emissions: a review

Zhang

Dong

Lan

et al. 2023

Environ Sci Pollut Res

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Diesel particulate filter (DPF) is considered as an effective method to control particulate matter (PM) emissions from diesel engines, which is included in the mandatory installation list by more and more national/regional laws and regulations, such as CHINA VI, Euro VI, and EPA Tier3. Due to the limited capacity of DPF to contain PM, the manufacturer introduced a method of treating deposited PM by oxidation, which is called regeneration. This paper comprehensively summarizes the most advanced regeneration technology, including filter structure, new catalyst formula, accurate soot prediction, safe and reliable regeneration strategy, uncontrolled regeneration and its control methods. In addition, due to the change of working conditions in the regeneration process, the additional emissions during regeneration are discussed in this paper. The DPF is not only the aftertreatment device but also can be combined with diesel oxidation catalyst (DOC), selective catalytic reduction (SCR) and exhaust recirculation (EGR). In addition, the impact of DPF modification on the original system of some old models has been reasonably discussed in order to achieve emission targets.

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Section: Diesel Particulate Filter Regenerationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Diesel particulate filter regeneration mechanism of modern automobile engines and methods of reducing PM emissions: a review

Zhang

Dong

Lan

et al. 2023

Environ Sci Pollut Res

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“…From the literature results, a general consensus has been made that the soot catalytic performance of a catalyst is sensitive to various factors, including but not limited to soot composition, soot–catalyst ratio, catalyst–soot contact mode, and gaseous reactions. − Before introducing the soot catalytic performances of different manganese oxide-based catalysts, a brief review of those influencing factors and their issues on soot oxidation activities is first performed.…”

Section: Backgrounds On Soot-catalytic Oxidation Activitymentioning

confidence: 99%

“…The efficiency of the catalytic soot process can be affected by the gaseous reaction or even the type of oxidant used in the system. Air (oxygen) is the most common oxidizing gas, whereas NO 2 is a more powerful oxidizing gas with a more active oxidation process . NO 2 could efficiently react with soot at a lower temperature of 350 °C than the typical soot burn-out temperature (∼600 °C) in an oxygen atmosphere .…”

Section: Backgrounds On Soot-catalytic Oxidation Activitymentioning

confidence: 99%

“…Air (oxygen) is the most common oxidizing gas, whereas NO 2 is a more powerful oxidizing gas with a more active oxidation process. 56 NO 2 could efficiently react with soot at a lower temperature of 350 °C than the typical soot burn-out temperature (∼600 °C) in an oxygen atmosphere. 57 However, only a small amount of NO x (less than 5 ppm) may be used for soot catalytic oxidation in catalytically coated gasoline particulate filters (CGPFs) because three-way catalysts (TWC) have already converted most of the NO x into N 2 .…”

Section: Influences Of Gaseous Reactions and Flowmentioning

confidence: 99%

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Manganese Oxide-Based Catalysts for Soot Oxidation: A Review on the Recent Advances and Future Directions

Khaskheli

Liu

2022

Energy Fuels

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Soot particles generated by combustion engines, such as gasoline direct injection engines (GDIs) and diesel engines, must be removed from the exhaust to meet the tightened emissions standards. The particulate filters with coated catalysts are common and successful techniques for the oxidation and removal of soot, during which the catalytic performance of the used catalyst plays a critical role. This review aims to discuss the soot oxidation behavior using manganese oxides as catalysts considering their beneficial natures of high catalytic oxidation activities, cost effectiveness, and environmental friendliness. This review begins with a brief discussion on how the various influential factors (e.g., soot composition, soot–catalyst mixing ratios, contact conditions, and gaseous reactions) could affect the soot catalyst activities. After that, a detailed introduction to various kinds of manganese oxide-based catalysts, including pure manganese oxides and types of perovskites, composites, and mixed, as well as manganese oxides decorated by nanoparticles or doped with metals, was provided, with the focus on the catalytic performances of each kind of catalyst and the catalytic mechanisms. The thermal stabilities of different manganese oxide-based catalysts were then briefly introduced. Finally, remarkable results and interesting findings were summarized, which are expected to provide valuable guidance for the synthesis, design, and performance optimization of manganese oxide-based catalysts for soot catalytic combustion.

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Research Advances in Rare Earth Oxide‐Based Catalysts for Soot Combustion

Ma,

Guo,

Xiong

et al. 2024

ChemCatChem

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Environmental issues exert a significant influence on the human life. Soot particles have attracted attention as a major source of pollution. Significant progress has been made in the research of efficient soot combustion catalysts. The distinctive bonding properties on the 4f orbitals of rare earth elements exhibit excellent catalytic performance for soot combustion. This comprehensive review explores recent advancements in the design of catalysts based on rare earth oxides, with a specific focus on various catalytic materials (La‐based, Ce‐based, Pr‐based and other rare earth elements), synthesis methods, catalyst morphology, catalytic performance and the intricate mechanisms governing their performance in catalytic soot combustion. The activity and selectivity of different rare earth catalysts in various reaction atmospheres are also summarized in the article. Finally, the challenges associated with rare earth oxide‐based catalysts and their potential for future development in the soot combustion are highlighted. This review establishes a fundamental basis for the further design of catalytic materials that exhibit enhanced efficiency and stability.

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Promotional Effects of Sm/Ce/La Doping on Soot Oxidation over MnCo₂O₄ Spinel Catalysts

Abstract: Sm/La/Ce-doped spinel catalysts were prepared by a sol−gel method, and their catalytic performance in soot oxidation was investigated. The catalytic activity of the samples was ranked as follows: Sm 0.

Cited by 10 publications

References 62 publications

Diesel particulate filter regeneration mechanism of modern automobile engines and methods of reducing PM emissions: a review

Diesel particulate filter regeneration mechanism of modern automobile engines and methods of reducing PM emissions: a review

Manganese Oxide-Based Catalysts for Soot Oxidation: A Review on the Recent Advances and Future Directions

Research Advances in Rare Earth Oxide‐Based Catalysts for Soot Combustion

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Promotional Effects of Sm/Ce/La Doping on Soot Oxidation over MnCo2O4 Spinel Catalysts

Abstract: Sm/La/Ce-doped spinel catalysts were prepared by a sol−gel method, and their catalytic performance in soot oxidation was investigated. The catalytic activity of the samples was ranked as follows: Sm 0.

Cited by 10 publications

References 62 publications

Diesel particulate filter regeneration mechanism of modern automobile engines and methods of reducing PM emissions: a review

Diesel particulate filter regeneration mechanism of modern automobile engines and methods of reducing PM emissions: a review

Manganese Oxide-Based Catalysts for Soot Oxidation: A Review on the Recent Advances and Future Directions

Research Advances in Rare Earth Oxide‐Based Catalysts for Soot Combustion

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Product

Resources

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Promotional Effects of Sm/Ce/La Doping on Soot Oxidation over MnCo₂O₄ Spinel Catalysts