A Study of a New Aftertreatment System (1): A New Dosing Device for Enhancing Low Temperature Performance of Urea-SCR

Kowatari, Takehiko; Hamada, Yosuke; Amou, Kiyoshi; Hamada, Ikuhisa; Funabashi, Hiroshi; Takakura, Takashi; Nakagome, Keiichi

doi:10.4271/2006-01-0642

Cited by 30 publications

(10 citation statements)

References 3 publications

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“…The zeolite SCR catalyst combination performs better and has higher temperature tolerance levels. There is ongoing research to improve low temperature performance for more accurate NO 2 and NO X concentration predictions [110][111][112].…”

Section: Nitrogen Oxide (No X ) Concentrationmentioning

confidence: 99%

Effects of Biodiesel Blends Varied by Cetane Numbers and Oxygen Contents on Stationary Diesel Engine Performance and Exhaust Emissions

Maroa¹,

Inambao²

2020

Numerical and Experimental Studies on Combustion Engines and Vehicles

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This work investigated waste plastic pyrolysis oil (WPPO), 2-ethyl hexyl nitrate (EHN), and ethanol as sources of renewable energy, blending conventional diesel (CD), WPPO, and ethanol with EHN was to improve the combustion and performance characteristics of the WPPO blends. EHN has the potential to reduce emissions of CO, CO2, UHC, NOX, and PM. Ethanol improves viscosity, miscibility, and the oxygen content of WPPO. Mixing ratios were 50/WPPO25/E25, 60/WPPO20/E20, 70/WPPO15/E15, 80/WPPO10/E10, and 90/WPPO5/E5 for CD, waste plastic pyrolysis oil, and ethanol, respectively. The mixing ratio of EHN (0.01%) was based on the total quantity of blended fuel. Performance and emission characteristics of a stationary 4-cylinder water-cooled diesel Iveco power generator were evaluated with ASTM standards. At 1000 rpm, the BSFC was 0.043 kg/kWh compared to CD at 0.04 kg/kWh. Blend 90/WPPO5/E5 had the highest value of 14% for BTE, while the NOX emissions for 90/WPPO5/E5, 80/WPPO10/E10, and 70/WPPO15/E15 were 384, 395, and 414 ppm, respectively, compared to CD fuel at 424 ppm. This is due to their densities of 792 kg/m3, 825 kg/m3 which are close to CD fuel at 845 kg/m3 and the additive EHN. These results show blends of WPPO, ethanol and EHN reduce emissions, and improve engine performance, mimicking CD fuel.

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Section: Nitrogen Oxide (No X ) Concentrationmentioning

confidence: 99%

Effects of Biodiesel Blends Varied by Cetane Numbers and Oxygen Contents on Stationary Diesel Engine Performance and Exhaust Emissions

Maroa¹,

Inambao²

2020

Numerical and Experimental Studies on Combustion Engines and Vehicles

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“…A similar concept was presented by Kowatari et al [82]. The device consisted of an electrically heated bypass and a hydrolysis catalyst inside the bypass.…”

Section: Nh 3 Generation Outside Of Exhaust Tractmentioning

confidence: 99%

Potential Technical Approaches for Improving Low‐Temperature NO_x Conversion of Exhaust Aftertreatment Systems

Braun

Gebhard

Matysik

et al. 2018

Chemie Ingenieur Technik

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Lean‐burn engines, such as diesel engines, are widely used in mobile and stationary applications. Operation of lean‐burn engines leads to formation of distinct amounts of nitrogen oxides (NO and NO2). Efficient aftertreatment is mandatory to meet legal requirements, especially at low exhaust temperatures, as for the future a decline of the exhaust temperature level can be predicted due to improved engine efficiencies. Within this review, potential technical solutions to enhance the DeNOx‐aftertreatment efficiency at low exhaust temperatures are presented.

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“…Specifically, within the last decades engine emissions have been reduced significantly adopting new aftertreatment strategies [1][2][3][4][5]. To this purpose, a host of investigations has been focused on oxidation catalysts (OC), diesel particulate filters (DPF), lean NO x traps (LNT), lean NO x catalysts (LNC), and selective catalytic reductions (SCR) [6][7][8][9][10][11][12]. Nevertheless, further improvements are necessary to meet the more and more stringent exhaust regulations, to improve the energetic effectiveness of modern emission control systems and to balance costs and fuel economy benefits.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on the energetic performances of conventional and pellet aftertreatment systems in flow-through and reverse-flow designs

Morrone¹,

Algieri²

2011

THERM SCI

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The aim of the paper is the analysis of the energetic performances of structured and pelletized aftertreatment systems in flow-through and reverse-flow designs (passive and active flow control respectively) for diesel internal combustion engines. To this purpose, the influence of the engine operating conditions on the system performances has been investigated adopting a one-dimensional time-dependent model. Specifically, the thermal behaviour and the fuel saving capability of several arrangements have been characterized. The analysis has shown that the active emission control system with pelletized design guarantees higher heat retention capability. Furthermore, the numerical model has revealed the significant influence of the solid and exhaust gas temperature on the energy efficiency of the aftertreatment systems and the large effect of exhaust mass flow rate and unburned hydrocarbons concentration

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A Study of a New Aftertreatment System (1): A New Dosing Device for Enhancing Low Temperature Performance of Urea-SCR

Cited by 30 publications

References 3 publications

Effects of Biodiesel Blends Varied by Cetane Numbers and Oxygen Contents on Stationary Diesel Engine Performance and Exhaust Emissions

Effects of Biodiesel Blends Varied by Cetane Numbers and Oxygen Contents on Stationary Diesel Engine Performance and Exhaust Emissions

Potential Technical Approaches for Improving Low‐Temperature NO_x Conversion of Exhaust Aftertreatment Systems

Numerical investigation on the energetic performances of conventional and pellet aftertreatment systems in flow-through and reverse-flow designs

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A Study of a New Aftertreatment System (1): A New Dosing Device for Enhancing Low Temperature Performance of Urea-SCR

Cited by 30 publications

References 3 publications

Effects of Biodiesel Blends Varied by Cetane Numbers and Oxygen Contents on Stationary Diesel Engine Performance and Exhaust Emissions

Effects of Biodiesel Blends Varied by Cetane Numbers and Oxygen Contents on Stationary Diesel Engine Performance and Exhaust Emissions

Potential Technical Approaches for Improving Low‐Temperature NOx Conversion of Exhaust Aftertreatment Systems

Numerical investigation on the energetic performances of conventional and pellet aftertreatment systems in flow-through and reverse-flow designs

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Product

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Potential Technical Approaches for Improving Low‐Temperature NO_x Conversion of Exhaust Aftertreatment Systems