Model-Based Comparison of Passive SCR Aftertreatment Systems for Electrified Diesel Applications

Karamitros, Dimitrios; Avgerinos, Christos; Skarlis, Stavros A.; Koltsakis, G. C.; Previtero, Giuseppe; Bechis, Francesco

doi:10.4271/2020-37-0023

Cited by 3 publications

(2 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the relevant regulations of the airport, the speed limit of vehicles in the airport is 50 km/h, and long-term low-speed driving is likely to cause vehicle emissions to fail to meet the standard [20] . The operating trajectory and operation characteristics of the aircraft passenger elevator car in the airport are relatively fixed.…”

Section: Test Vehicle Operating Conditions and Exhaust Temperature Ch...mentioning

confidence: 99%

Particulate Matter Load Estimation and Distribution Characteristics of Diesel Particulate Filter

Wang

et al. 2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

This paper focuses on the offline electric heating regeneration technology of DPF (Diesel Particulate Filter). Based on the actual operating conditions of the airport passenger elevator, the pressure drop changes before and after the offline regeneration of DPF, the passive regeneration process during the vehicle operation, and the capture efficiency of PM and PN after the offline regeneration of DPF are studied. The DPF pressure drop increases with the operation time because of the extremely low efficiency of passive regeneration before offline regeneration, and the initial pressure drop after regeneration is slightly higher than that of the fresh carrier due to the existence of ash. When the exhaust temperature reaches 420°C, the DPF passive regeneration rate is higher than the capture rate, and the DPF pressure drop drops rapidly when the passenger elevator continues to run. The mass fraction of fine particulate matter is more than 0.02μm in the cold start stage, while the mass fraction of fine particulate matter is more than 0.02μm in the hot start stage.

show abstract

Section: Test Vehicle Operating Conditions and Exhaust Temperature Ch...mentioning

confidence: 99%

Particulate Matter Load Estimation and Distribution Characteristics of Diesel Particulate Filter

Wang

et al. 2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…Therefore, the aftertreatment system of diesel vehicles only injects urea followed by the urea hydrolysis producing reductant NH 3 to participate in the NH 3 -SCR reaction when the exhaust gas temperature is higher than 180 °C. The NO x emitted during the cold-start period cannot be controlled through the catalytic reduction process, − leading to the escape of a large amount of unconverted NO x . Therefore, it is highly essential to develop new technologies or catalyst systems to control the cold-start NO x emissions especially when the NO x emission control standard for vehicles has become more and more stringent worldwide nowadays.…”

Section: Introductionmentioning

confidence: 99%

Unique κ-Ce₂Zr₂O₈ Superstructure Promoting the NO_x Adsorption-Selective Catalytic Reduction (AdSCR) Performance of the WO₃/CeZrO_x Catalyst

Liu,

Huang,

et al. 2023

Environ. Sci. Technol.

View full text Add to dashboard Cite

Selective catalytic reduction of NO x by NH3 (NH3-SCR) for diesel emission control at low temperatures is still a great challenge due to the limit of the urea injection threshold and inferior SCR activity of state-of-the-art catalyst systems below 200 °C. Fabricating bifunctional catalysts with both low temperature NO x adsorption-storage capacity and medium-high temperature NO x reduction activity is an effective strategy to solve the issues mentioned above but is rarely investigated. Herein, the WO3/Ce0.68Zr0.32O x (W/CZ) catalyst containing the κ-Ce2Zr2O8 pyrochlore structure was successfully developed by a simple H2 reduction method, not only showing superior NO x adsorption-storage ability below 180 °C but also exhibiting excellent NH3-SCR activity above 180 °C. The presence of the pyrochlore structure effectively increased the oxygen vacancies on the κ-Ce2Zr2O8-containing W/CZ catalyst with enhanced redox property, which significantly promoted the NO x adsorption-storage as active nitrate species below 180 °C. Upon NH3 introduction above 180 °C, the κ-Ce2Zr2O8-containing W/CZ catalyst showed greatly improved NO x reduction performance, suggesting that the pyrochlore structure played a vital role in improving the NO x adsorption-selective catalytic reduction (AdSCR) performance. This work provides a new perspective for designing bifunctional CeZrO x -based catalysts to efficiently control the NO x emissions from diesel engines during the cold-start process.

show abstract

Development of a virtual methodology based on physical and data-driven models to optimize engine calibration

Boccardo¹,

Piano

Zanelli³

et al. 2022

Transportation Engineering

View full text Add to dashboard Cite

Model-Based Comparison of Passive SCR Aftertreatment Systems for Electrified Diesel Applications

Cited by 3 publications

References 15 publications

Particulate Matter Load Estimation and Distribution Characteristics of Diesel Particulate Filter

Particulate Matter Load Estimation and Distribution Characteristics of Diesel Particulate Filter

Unique κ-Ce₂Zr₂O₈ Superstructure Promoting the NO_x Adsorption-Selective Catalytic Reduction (AdSCR) Performance of the WO₃/CeZrO_x Catalyst

Development of a virtual methodology based on physical and data-driven models to optimize engine calibration

Contact Info

Product

Resources

About

Model-Based Comparison of Passive SCR Aftertreatment Systems for Electrified Diesel Applications

Cited by 3 publications

References 15 publications

Particulate Matter Load Estimation and Distribution Characteristics of Diesel Particulate Filter

Particulate Matter Load Estimation and Distribution Characteristics of Diesel Particulate Filter

Unique κ-Ce2Zr2O8 Superstructure Promoting the NOx Adsorption-Selective Catalytic Reduction (AdSCR) Performance of the WO3/CeZrOx Catalyst

Development of a virtual methodology based on physical and data-driven models to optimize engine calibration

Contact Info

Product

Resources

About

Unique κ-Ce₂Zr₂O₈ Superstructure Promoting the NO_x Adsorption-Selective Catalytic Reduction (AdSCR) Performance of the WO₃/CeZrO_x Catalyst