A review on catalytic oxidation of soot emitted from diesel fuelled engines

Neha,; Прасад, Рам; Singh, Shalendra

doi:10.1016/j.jece.2020.103945

Cited by 61 publications

(20 citation statements)

References 120 publications

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“…The obtained values were 110.3 and 120 kJ/mol for the Vyazovkin and for the OFW methods, respectively. Here is essential to mention that Ea's estimated values are slightly smaller than those previously reported between 132 and 137 kJ/mol [26].…”

Section: Catalytic Evaluation Of the Soot Combustioncontrasting

confidence: 70%

Development of a fluorite/perovskite composite for the catalytic combustion of soot

et al. 2021

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The fluorite/perovskite composite with general formula Ce 0.9 Pr 0.1 O 2−δ /Pr 0.6 Sr 0.4 Fe 0.5 Co 0.5 O 3−δ was chemically synthesized by the citrate-EDTA method and subsequent calcination. First, the microstructural and textural properties of the ceramic powder were determined by several techniques such as XRD, N 2 physisorption, SEM, and TEM. Then the catalyst was loaded with Co as a promoter phase. Next, the catalytic evaluations were performed using thermogravimetric analysis to determine the combustion temperature of soot. Moreover, a series of cyclic analyses were carried out to evaluate the thermal stability of the catalyst. Based on the thermogravimetry data, the kinetic parameters of the catalytic soot combustion process were obtained.

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Section: Catalytic Evaluation Of the Soot Combustioncontrasting

confidence: 70%

Development of a fluorite/perovskite composite for the catalytic combustion of soot

et al. 2021

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“…[31a,34] As shown in XRD patterns, all CuB 2 O 4 catalysts show the presence of spinel structures. The coexistence of tetrahedral and octahedral positions in the spinel crystalline could provide multiple sites to accommodate the transition metal cations with different valences and form a large number of oxides, [12,35] which in turn affect the chemical properties of the catalysts. Moreover, the segregated phase of CuO is observed in the XRD patterns of CuCo 2 O 4 catalysts.…”

Section: Chemistryselectmentioning

confidence: 99%

“…Among them, spinel catalysts have been intensively studied due to their good activity, relative low cost, easy synthesis and high thermal stability. [12] Many researchers have investigated the doping or substitution of the composition of A-site or B-site elements to further improve the performance of spinel catalysts since it could facilitate the redox properties and thermal stabilities of spinel catalysts. Alvarez-Docio et al found that incorporating Ni element into the CoAl 2 O 4 spinel catalysts could improve its catalytic activity, which reduced T 50 to 371 °C.…”

Section: Introductionmentioning

confidence: 99%

Activity and Stability of Cu‐Based Spinel‐Type Complex Oxides for Diesel Soot Combustion

Zhang

Zhu

et al. 2021

ChemistrySelect

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A series of Cu‐based spinel‐type complex oxides (CuB2O4, B=Fe, Mn, Co and Cr) was synthesized via sol‐gel method for soot combustion. The soot combustion was accelerated in the presence of all prepared CuB2O4 catalysts compared to that without catalyst. The CuCo2O4 catalyst exhibited the best catalytic activity, with the soot combustion temperatures T10, T50 and T90 of 480 °C, 539 °C and 569 °C, respectively. XRD patterns showed that the catalysts were mainly in spinel phase. The H2‐TPR, XPS and O2‐TPD characterizations revealed that the interactions between cobalt and copper led to higher content of the Cu+ species, better redox properties and abundant adsorbed oxygen species than the other three catalysts, which contributed to soot combustion. In addition, the catalytic activity of the CuCo2O4 catalysts on soot combustion were facilitated in the presence of NO, while water vapor inhibited the catalytic activity. Besides, the cycle tests clarified that CuCo2O4 catalyst exhibited good stability.

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“…In terms of the active components in the catalysts, they can be categorized into precious metal nanoparticles, nonprecious metal (transition and alkali metal) oxides, − and rare earth oxides. , It is widely acknowledged that precious metals (Pt and Pd) remain the essentially active components in conventionally commercial catalysts for the purification of engine exhaust. However, they present expensive price, and their reserves are limited . Thus, it is urgent and challenging to design and construct the efficient and inexpensive metal catalysts for boosting soot purification …”

Section: Introductionmentioning

confidence: 99%

Boosting Catalytic Purification of Soot Particles over Double Perovskite-Type La_2–xK_xNiCoO₆ Catalysts with an Ordered Macroporous Structure

Zhang

Mei

Zhao

et al. 2021

Environ. Sci. Technol.

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The catalytic performances for soot purification over the perovskite-type ABO3 oxides, as one of the most potential non-noble metal catalysts, are closely correlated with the substitution of A-site and B-site ions. Herein, three-dimensional ordered macroporous (3DOM) structural catalysts of double perovskite-type La2–x K x NiCoO6 were prepared by a method of colloidal crystal template. The contact efficiency between the catalyst and soot particles is significantly promoted by the 3DOM structure, and the partial substitution of A-site (La) with low-valence potassium (K) ions in La2–x K x NiCoO6 catalysts boosts the increasing surface density of coordinatively unsaturated active B-sites (Co and Ni) and active oxygen. 3DOM La2–x K x NiCoO6 catalysts exhibited superior performance during the purification of soot particles, and the 3DOM La1.80K0.20NiCoO6 catalyst exhibited the highest activity, that is, the values of T 50, S CO2, and turnover frequency are 346 °C, 99.3%, and 0.204 h–1 (at 300 °C), respectively. According to the results of multiple experimental characterizations and density functional theory calculations, the mechanism of the samples during soot removal is proposed: the increase in surface oxygen density induced by the doping of K ions significantly promotes the critical step of the oxidation from NO to NO2 in catalyzing soot purification. It is one new strategy to develop the high-efficient non-noble metal catalysts for soot purification in practical application.

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A review on catalytic oxidation of soot emitted from diesel fuelled engines

Cited by 61 publications

References 120 publications

Development of a fluorite/perovskite composite for the catalytic combustion of soot

Development of a fluorite/perovskite composite for the catalytic combustion of soot

Activity and Stability of Cu‐Based Spinel‐Type Complex Oxides for Diesel Soot Combustion

Boosting Catalytic Purification of Soot Particles over Double Perovskite-Type La_2–xK_xNiCoO₆ Catalysts with an Ordered Macroporous Structure

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A review on catalytic oxidation of soot emitted from diesel fuelled engines

Cited by 61 publications

References 120 publications

Development of a fluorite/perovskite composite for the catalytic combustion of soot

Development of a fluorite/perovskite composite for the catalytic combustion of soot

Activity and Stability of Cu‐Based Spinel‐Type Complex Oxides for Diesel Soot Combustion

Boosting Catalytic Purification of Soot Particles over Double Perovskite-Type La2–xKxNiCoO6 Catalysts with an Ordered Macroporous Structure

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Boosting Catalytic Purification of Soot Particles over Double Perovskite-Type La_2–xK_xNiCoO₆ Catalysts with an Ordered Macroporous Structure