Newly Developed Cordierite Honeycomb Substrate for SCR Coating Realizing System Compactness and Low Backpressure

Hirose, Shogo; Miyairi, Y.; Katsube, F.; Yuuki, Kazuya; Sakamoto, Hirofumi; Vogt, Claus; Fujii, Satoshi

doi:10.4271/2012-01-1079

Cited by 10 publications

(5 citation statements)

References 1 publication

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“…1. Porosity configuration of cordierite substrate [5] In a high-porosity substrate, the DOC catalyst penetrates the wall, and the catalyst amount on the wall surface is relatively small. As a result, in the high-porosity substrate fundamental concept, pores in the substrate walls are used as "added" catalyst support, suppressing decreases in hydraulic diameter (Hd) as the catalyst amount is increased [5][6].…”

Section: Diesel Oxidation Catalyst (Doc) Configurationsmentioning

confidence: 99%

“…Porosity configuration of cordierite substrate [5] In a high-porosity substrate, the DOC catalyst penetrates the wall, and the catalyst amount on the wall surface is relatively small. As a result, in the high-porosity substrate fundamental concept, pores in the substrate walls are used as "added" catalyst support, suppressing decreases in hydraulic diameter (Hd) as the catalyst amount is increased [5][6]. Accordingly, selection of a substrate with thin wall technology is significant for increased open frontal area; for this, typically, cell densities of 300 and 400 cpsi for offroad diesel engines can be preferred.…”

Section: Diesel Oxidation Catalyst (Doc) Configurationsmentioning

confidence: 99%

See 1 more Smart Citation

Study on Selection of Diesel Engine Exhaust After-Treatment System Materials and Emission Performance for Genset Applications

SUBRAMANİAN,

KANDASWAMY

2023

International Journal of Automotive Science and Technology

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The use of diesel engines for the transportation sector is ubiquitous and covers a broad continuum, like buses, trucks, agriculture, construction equipment, generators, and industrial applications. However, because of their increased use of off-road engines, they contribute more emissions in various sectors than on-road. As a result, worldwide, regardless of ongoing emission control efforts, these off-road, stationary engines also continue to be a substantial source of air pollutant emissions in the United States, European Union and Asian markets. Accordingly, while improving emissions performance, the selection of after-treatment system materials and the use of compatible after-treatment specification selections are also critical. This is only possible by effectively combining clean diesel technologies such as Fuel Injection Equipment (FIE), Turbocharger with Intercooler (TCIC), Cooled Exhaust Gas Recirculation (C-EGR), and after-treatment systems like Diesel Oxidation Catalyst (DOC), Selective Catalytic Reduction (SCR), and Diesel Particulate Filter (DPF). Overall, in this study, the influence of after-treatment system configurations and their effect on emission reduction performance are studied for three different DOC specifications based on emission testing for catalyst and size optimization. With the selected DOC catalyst specification, suitable combinations of DPF and SCR specifications are optimized further using GT-SUIT software simulation. This study was carried out during the conversion of a 15 kW NA engine to a 27 kW TCIC engine to meet diesel engine emission norms.

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Section: Diesel Oxidation Catalyst (Doc) Configurationsmentioning

confidence: 99%

Section: Diesel Oxidation Catalyst (Doc) Configurationsmentioning

confidence: 99%

Study on Selection of Diesel Engine Exhaust After-Treatment System Materials and Emission Performance for Genset Applications

SUBRAMANİAN,

KANDASWAMY

2023

International Journal of Automotive Science and Technology

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“…For example, in HP 5/600 x1.5, 'HP' stands for high porosity, 5/600 is the cell structure and x1.5 denotes the ratio of active washcoat amount with respect to the reference amount of the conventional SP catalyst. The geometrical and structural properties used in the simulations (see Table 3) were selected based on the literature (3) . Fig.…”

Section: Model-based Comparison Of Substrate Technologiesmentioning

confidence: 99%

“…SCR catalytic material is washcoated on the external surface of the wall and the amount of washcoat is limited by pressure drop induced by the reduction of open frontal area. On the other hand, extruded catalysts can have more active material per reactor volume which results in improved de-NOX performance compared to conventional coated catalysts, especially in the low temperature region (3) . Recently, the technology of high porosity substrates has been proposed.…”

Section: Introductionmentioning

confidence: 99%

Model-based Optimization of Advanced SCR Substrates

Koltsakis

Stavros²,

Thomas

et al. 2015

IJAE

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Innovative high porosity SCR substrates are targeting at optimum utilization of high catalyst amounts without increasing pressure drop. Mathematical modeling of such technologies is challenging, requiring accurate description of both chemistry and mass transfer inside the active material. In this work, a systematic experimental study is conducted towards calibrating a comprehensive commercial simulation model for a Cu-zeolite SCR catalyst. Based on the calibrated model, it is possible to evaluate different substrate technologies with respect to NOX conversion, pressure drop and packaging volume reduction potential.

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“…17 Second, there have been many research studies and developments to improve the geometrical characteristics of the SCR substrates. [18][19][20][21][22] One of the key technical directions is to increase the cell density of the SCR substrate to 900 cells/in 2 , while 400 cells/in 2 is the commercial mainstream value utilized at present. 18,20 A high-cell-density substrate can easily provide more active catalytic sites, which enables the exhaust gas to have more deNO x reaction opportunities.…”

Section: Introductionmentioning

confidence: 99%

Simulation study on improving the selective catalytic reduction efficiency by using the temperature rise in a non-road transient cycle

Wang¹,

Kim²,

Ahn³

2016

Proceedings of the Institution of Mechanical Engineers, Part D:

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In this study, the transient nitrogen oxide reduction performance of a urea selective catalytic reduction system installed on a non-road diesel engine was tested on an engine dynamometer bench over a scheduled non-road transient cycle mode. Based on the measurement results, the characteristics of the transient selective catalytic reduction behaviours of nitrogen oxide reduction were evaluated. Also, in this study, the effects of several thermal management strategies for improving the selective catalytic reduction efficiency was investigated by transient selective catalytic reduction simulations. The kinetic parameters of the current simulation code for selective catalytic reduction were calibrated and validated by comparison with the measurement data. As a result of this study, it was found that a thermal management strategy utilizing a partial temperature rise in the transient time domain can be an efficient approach for improving the transient selective catalytic reduction efficiency, in comparison with the temperature rise over the entire cycle period. Furthermore, this study can provide some guideline data for the magnitude and the duration of the temperature rise required to obtain the target selective catalytic reduction efficiency over the non-road transient cycle mode. In the last part of this study, the impact of the variation in the space velocity on the transient selective catalytic reduction efficiency was assessed using transient selective catalytic reduction simulations.

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Newly Developed Cordierite Honeycomb Substrate for SCR Coating Realizing System Compactness and Low Backpressure

Cited by 10 publications

References 1 publication

Study on Selection of Diesel Engine Exhaust After-Treatment System Materials and Emission Performance for Genset Applications

Study on Selection of Diesel Engine Exhaust After-Treatment System Materials and Emission Performance for Genset Applications

Model-based Optimization of Advanced SCR Substrates

Simulation study on improving the selective catalytic reduction efficiency by using the temperature rise in a non-road transient cycle

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