Particulate Filter Design for High Performance Diesel Engine Application

Li, Cheng G.; Koelman, Hein; Ramanathan, Ravi; Baretzky, Ulrich; Forbriger, Gunter; Meunier, Thibaut

doi:10.4271/2008-01-1747

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…By increasing the porosity of the ACM filters, more NO x storage catalyst can be loaded onto the filters. Previous studies have shown that ACM DPFs demonstrate high filtration efficiency, low-pressure drop, high-temperature handling capability, and excellent mechanical integrity at a porosity of 60% or higher. − …”

Section: Introductionmentioning

confidence: 99%

Simultaneous Reduction of Particulate Matter and NO_x Emissions Using 4-Way Catalyzed Filtration Systems

Swanson

Watts

Newman

et al. 2013

Environ. Sci. Technol.

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The next generation of diesel emission control devices includes 4-way catalyzed filtration systems (4WCFS) consisting of both NOx and diesel particulate matter (DPM) control. A methodology was developed to simultaneously evaluate the NOx and DPM control performance of miniature 4WCFS made from acicular mullite, an advanced ceramic material (ACM), that were challenged with diesel exhaust. The impact of catalyst loading and substrate porosity on catalytic performance of the NOx trap was evaluated. Simultaneously with NOx measurements, the real-time solid particle filtration performance of catalyst-coated standard and high porosity filters was determined for steady-state and regenerative conditions. The use of high porosity ACM 4-way catalyzed filtration systems reduced NOx by 99% and solid and total particulate matter by 95% when averaged over 10 regeneration cycles. A "regeneration cycle" refers to an oxidizing ("lean") exhaust condition followed by a reducing ("rich") exhaust condition resulting in NOx storage and NOx reduction (i.e., trap "regeneration"), respectively. Standard porosity ACM 4-way catalyzed filtration systems reduced NOx by 60-75% and exhibited 99.9% filtration efficiency. The rich/lean cycling used to regenerate the filter had almost no impact on solid particle filtration efficiency but impacted NOx control. Cycling resulted in the formation of very low concentrations of semivolatile nucleation mode particles for some 4WCFS formulations. Overall, 4WCFS show promise for significantly reducing diesel emissions into the atmosphere in a single control device.

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Section: Introductionmentioning

confidence: 99%

Simultaneous Reduction of Particulate Matter and NO_x Emissions Using 4-Way Catalyzed Filtration Systems

Swanson

Watts

Newman

et al. 2013

Environ. Sci. Technol.

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“…Higher amounts of soot in the wall are shown to be a function of low initial filtration efficiency and low permeability of the loaded wall. Therefore, there is an increasing interest in developing technologies to minimize the depth filtration effect (Li et al 2008, Ogyu et al 2008, Johnson 2009, Lee and Yang 2010. Such technologies offer the additional advantage of an increasingly linear correlation between accumulated soot mass and pressure drop making onboard management of the DPF operation control much simpler.…”

Section: Pm Propertiesmentioning

confidence: 99%

Catalyzed diesel particulate filter modeling

Koltsakis

Haralampous

Depcik

et al. 2013

Reviews in Chemical Engineering

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An increasing environmental concern for diesel particulate emissions has led to the development of efficient and robust diesel particulate filters (DPF). Although the main function of a DPF is to filter solid particles, the beneficial effects of applying catalytic coatings in the filter walls have been recognized. The catalyzed DPF technology is a unique type of chemical reactor in which a multitude of physicochemical processes simultaneously take place, thus complicating the tasks of design and optimization. To this end, modeling has contributed considerably in reducing the development effort by offering a better understanding of the underlying phenomena and reducing the excessive experimental efforts associated with experimental testing. A comprehensive review of the evolution and the most recent developments in DPF modeling, covering phenomena such as transport, fluid mechanics, filtration, catalysis, and thermal stresses, is presented in this article. A thorough presentation on the mathematical model formulation is given based on literature references and the differences between modeling approaches are discussed. Selected examples of model application and validation versus the experimental data are presented.

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Particulate Filter Design for High Performance Diesel Engine Application

Cited by 2 publications

References 5 publications

Simultaneous Reduction of Particulate Matter and NO_x Emissions Using 4-Way Catalyzed Filtration Systems

Simultaneous Reduction of Particulate Matter and NO_x Emissions Using 4-Way Catalyzed Filtration Systems

Catalyzed diesel particulate filter modeling

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Particulate Filter Design for High Performance Diesel Engine Application

Cited by 2 publications

References 5 publications

Simultaneous Reduction of Particulate Matter and NOx Emissions Using 4-Way Catalyzed Filtration Systems

Simultaneous Reduction of Particulate Matter and NOx Emissions Using 4-Way Catalyzed Filtration Systems

Catalyzed diesel particulate filter modeling

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Product

Resources

About

Simultaneous Reduction of Particulate Matter and NO_x Emissions Using 4-Way Catalyzed Filtration Systems

Simultaneous Reduction of Particulate Matter and NO_x Emissions Using 4-Way Catalyzed Filtration Systems