Synergetic effects of plasma and metal oxide catalysts on diesel soot oxidation

Ranji‐Burachaloo, Hadi; Masoomi‐Godarzi, Saghar; Khodadadi, Abbas Ali; Mortazavi, Yadollah

doi:10.1016/j.apcatb.2015.09.019

Cited by 59 publications

(34 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Equations E5 and E6 represent the formation of SOCs in the presence of NO2 [10], [36], [45], [46], [47]. The formation of SOCs may occur via direct interaction of free NO2 present in the feed gas with soot (E5) or from the nitrates stored on manganese oxides (E6) at lower temperatures [10], [45], [48], [49]. However, a delay of onset temperature in the absence of In general, oxidation reactions are catalyzed by manganese oxides are anticipated to occur through a Mars-van-Krevelen reaction mechanism [21], [30], [43], [50], [51].…”

Section: Discussionmentioning

confidence: 99%

“…In here, the formed SOCs are oxidized at the soot-catalyst interface via reacting with lattice oxygen (E7 & E8). The interaction is facilitated by the diffusion of lattice oxygen from the bulk to its surface [49], [50], [52], [53]. 2+ ---------------(8) The catalytic performance of a certain catalyst is governed by the activation energy and the reaction pathway [36].…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Mesoporous manganese oxides for NO2 assisted catalytic soot oxidation

Wasalathanthri

SantaMaria

Kriz

et al. 2017

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

Air pollution issues due to soot/diesel particulate matter (DPM) emitted from incomplete burning of diesel fuel have become a global issue in this century. A series of manganese oxides, namely amorphous manganese oxide (Meso-Mn-A), Mn2O3 (Meso-Mn2O3), MnO2 (epsilon phase) (Meso-ϵ-MnO2) and octahedral molecular sieves MnO2 (Meso-OMS-2) was synthesized via a soft template method. The potential of mesoporous manganese oxides in acceleration of NO2 assisted catalytic oxidation of diesel soot (Printex-U) under lean conditions was investigated. The physiochemical properties of synthesized materials were systematically characterized by X-ray diffraction, N2-sorption, high-resolution transmission electron microscopy, and H2-temperature programmed reduction. A series of temperature programmed oxidation experiments was carried out to investigate the effect of feed gas composition on activity of the catalyst, and TGA-MS experiments were done to calculate the kinetic energy for each system. Mesoporous manganese oxides were found to be effective for complete oxidation of diesel soot under exhaust gas temperatures, and activities of all the manganese oxides were increased in the presence of NO2 in the feed gas. Meso-ϵ-MnO2 possesses the highest performance, exhibiting the lowest Ti and Tm (230 °C and 305 °C), the narrowest temperature range (75 °C), and the lowest Ea (298 kJ/mol).

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Mesoporous manganese oxides for NO2 assisted catalytic soot oxidation

Wasalathanthri

SantaMaria

Kriz

et al. 2017

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

show abstract

“…To avoid the negative effects of the plasma on the catalyst, we used a two‐stage plasma catalysis system to study the synergistic effect of plasma catalysis. It has been reported that a two‐stage plasma catalysis system was used for soot oxidation and a synergistic effect between the plasma and the catalyst was demonstrated . In the present work, a Cu–Fe–Ce/HZSM‐5 catalyst was used for the synthesis of DME from CO 2 hydrogenation in a two‐stage plasma catalysis process.…”

Section: Introductionmentioning

confidence: 89%

Intrinsic Kinetics of Dimethyl Ether Synthesis from Plasma Activation of CO₂ Hydrogenation over Cu–Fe–Ce/HZSM‐5

Qin

2016

ChemPhysChem

View full text Add to dashboard Cite

CO is activated in a plasma reactor followed by hydrogenation over a Cu-Fe-Ce/HZSM-5 catalyst, and the intrinsic kinetics of the plasma catalytic process are studied. Compared with CO hydrogenation using Cu-Fe-Ce/HZSM-5 alone, the CO conversion and the dimethyl ether selectivity for the plasma catalytic process are increased by 16.3 %, and 10.1 %, respectively, indicating that the CO was activated by the plasma to promote hydrogenation. A study of the intrinsic kinetics shows that the activation energies of methanol formation, the reverse water-gas shift reaction, and methanol dehydration to dimethyl ether are 149.34, 75.47, and 73.18 kJ mol , respectively, which are lower than if Cu-Fe-Ce/HZSM-5 is used without plasma, indicating that the activation of CO in the plasma reduces the activation energy of the hydrogenation reaction and improves the yield of dimethyl ether.

show abstract

“…A semi analytical model for analysis of filter behavior during soot loading and regeneration was developed in [59]. Oxidation of soot by application of Non thermal plasma technique was also proposed in [60]. Diesel exhaust gas is passed through a catalyst bed of metal oxides and corona plasma reactor where plasma charge is direct to exhaust gas and catalysts.…”

Section: Other Techniques For Active Regeneration Of Dpfmentioning

confidence: 99%

Review on Post-Treatment Emission Control Technique by Application of Diesel Oxidation Catalysis and Diesel Particulate Filtration

Kurien¹

2019

Journal of Thermal Engineering

View full text Add to dashboard Cite

The toxic nature of exhaust gases released by these engines has led to environmental concerns, affecting its sustainability. The exhaust emission from diesel engine includes carbon monoxide, nitrates, hydrocarbons and particulate matter. Soot particles contained in the particulate matter is also found to be carcinogenic in nature and also leads to various lung diseases. Diesel oxidation catalysis system involves oxidation of hydrocarbons, nitrates and soluble organic fraction. Diesel particulate filtration blocks the soot particles with the help of alternately plugged diesel particulate filter with porous walls. The regeneration of accumulated soot is one of the major challenges faced by automotive industries for effective implementation of diesel particulate filtration system. A detailed review on the challenges faced in the implementation of emission control techniques has been carried out in this study and it has been explored from the results of literature study that microwave based regeneration technique would be an effective technique. This paper provides a platform for understanding the working principle of post treatment emission control techniques and also on the role of regeneration in effective operation of Diesel Particulate Filter.

show abstract

Synergetic effects of plasma and metal oxide catalysts on diesel soot oxidation

Cited by 59 publications

References 56 publications

Mesoporous manganese oxides for NO2 assisted catalytic soot oxidation

Mesoporous manganese oxides for NO2 assisted catalytic soot oxidation

Intrinsic Kinetics of Dimethyl Ether Synthesis from Plasma Activation of CO₂ Hydrogenation over Cu–Fe–Ce/HZSM‐5

Review on Post-Treatment Emission Control Technique by Application of Diesel Oxidation Catalysis and Diesel Particulate Filtration

Contact Info

Product

Resources

About

Synergetic effects of plasma and metal oxide catalysts on diesel soot oxidation

Cited by 59 publications

References 56 publications

Mesoporous manganese oxides for NO2 assisted catalytic soot oxidation

Mesoporous manganese oxides for NO2 assisted catalytic soot oxidation

Intrinsic Kinetics of Dimethyl Ether Synthesis from Plasma Activation of CO2 Hydrogenation over Cu–Fe–Ce/HZSM‐5

Review on Post-Treatment Emission Control Technique by Application of Diesel Oxidation Catalysis and Diesel Particulate Filtration

Contact Info

Product

Resources

About

Intrinsic Kinetics of Dimethyl Ether Synthesis from Plasma Activation of CO₂ Hydrogenation over Cu–Fe–Ce/HZSM‐5