Engine-Independent Exhaust Gas Aftertreatment Using a Burner Heated Catalyst

Schweinsberg, Alexander Schenck zu; Klenk, Martin; Degen, Alf

doi:10.4271/2006-01-3401

Cited by 17 publications

(2 citation statements)

References 8 publications

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“…The burners installed at the upstream side of the catalysts heat the exhaust gas directly, which can effectively reduce the light-off time of the DOC. Alexander et al [130] employed a burner in a 2 L engine after-treatment system. The emission of HC improved significantly when the preheat time was 0.5 s. When the preheat time was extended to about 20 s, the catalytic converter reached the light-off temperature before the engine turned on.…”

Section: Burnermentioning

confidence: 99%

A Review of Thermal Energy Management of Diesel Exhaust after-Treatment Systems Technology and Efficiency Enhancement Approaches

Wu,

Feng,

et al. 2024

Energies

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The DOC (diesel oxidation catalyst), DPF (diesel particulate filter), SCR (selective catalytic reduction), and ASC (ammonia slip catalyst) are widely used in diesel exhaust after-treatment systems. The thermal management of after-treatment systems using DOC, DPF, SCR, and ASC were investigated to improve the efficiency of these devices. This paper aims to identify the challenges of this topic and seek novel methods to control the temperature. Insulation methods and catalysts decrease the energy required for thermal management, which improves the efficiency of thermal management. Thermal insulation decreases the heat loss of the exhaust gas, which can reduce the after-treatment light-off time. The DOC light-off time was reduced by 75% under adiabatic conditions. A 400 W microwave can heat the DPF to the soot oxidation temperature of 873 K at a regeneration time of 150 s. An SCR burner can decrease NOx emissions by 93.5%. Electrically heated catalysts can decrease CO, HC, and NOx emissions by 80%, 80%, and 66%, respectively. Phase-change materials can control the SCR temperature with a two-thirds reduction in NOx emissions. Pt-Pd application in the catalyst can decrease the CO light-off temperature to 113 °C. Approaches of catalysts can enhance the efficiency of the after-treatment systems and reduce the energy consumption of thermal management.

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Section: Burnermentioning

confidence: 99%

A Review of Thermal Energy Management of Diesel Exhaust after-Treatment Systems Technology and Efficiency Enhancement Approaches

Wu,

Feng,

et al. 2024

Energies

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“…Another possible solution, which shares the advantages of electrical heating, is represented by burner heating. This technology was at first proposed in the early nineties [8,9] and then investigated in the following decade [10], showing a good potential in achieving high catalyst efficiency at the cold start. However, at that time, the implementation of simple in-cylinder thermal strategies was sufficient to accomplish the emission regulations and, therefore, there are not example of application of this solution on production vehicles.…”

mentioning

confidence: 99%

Numerical Assessment of an After-Treatment System Equipped with a Burner to Speed-Up the Light-Off during Engine Cold Start

Torre¹,

Barillari²,

Montenegro³

et al. 2021

SAE Technical Paper Series

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In the next years, the upcoming emission legislations are expected to introduce further restrictions on the admittable level of pollutants from vehicles measured on homologation cycles and real drive tests. In this context, the strict control of pollutant emissions at the cold start will become a crucial point to comply with the new regulation standards. This will necessarily require the implementation of novel strategies to speed-up the light-off of the reactions occurring in the after-treatment system, since the cold start conditions are the most critical one for cumulative emissions. Among the different possible technological solutions, this paper focuses on the evaluation of the potential of a burner system, which is activated before the engine start. The hypothetical burner exploits the lean combustion of an air-gasoline mixture to generate a high temperature gas stream which is directed to the catalyst section promoting a fast heating of the substrate. In this work, an experimental test bench has been adopted to characterize the thermal transient of the after-treatment system when the burner-like system is activated, monitoring the temperature of the gas flow and the temperature of the metallic walls at different locations. Moreover, a CFD model has been developed to investigate the light-off of the reactions during the initial operation of the burner and the subsequent start of the engine. The model, developed on the basis of the OpenFOAM code, resorts to a multi-region approach, where different meshes are employed to describe the fluid domain and the solid regions, namely the catalytic porous substrates and the metallic walls constituting pipes and canning. Specific submodels are implemented to consider flow resistance, heat transfer, mass transfer and catalytic reactions occurring in the catalyst region. The CFD framework has been initially validated on the experimental data acquired on the test bench. The methodology has been then applied to the preliminary analysis of the catalyst light-off at engine cold start, considering a full exhaust line equipped with burner-like system.

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CFD Investigation of a Burner-base Heating Strategy to Speed up the cold Start Transient of ICEs

et al. 2022

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Engine-Independent Exhaust Gas Aftertreatment Using a Burner Heated Catalyst

Cited by 17 publications

References 8 publications

A Review of Thermal Energy Management of Diesel Exhaust after-Treatment Systems Technology and Efficiency Enhancement Approaches

A Review of Thermal Energy Management of Diesel Exhaust after-Treatment Systems Technology and Efficiency Enhancement Approaches

Numerical Assessment of an After-Treatment System Equipped with a Burner to Speed-Up the Light-Off during Engine Cold Start

CFD Investigation of a Burner-base Heating Strategy to Speed up the cold Start Transient of ICEs

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