Design and evaluation of a sintered metal fiber filter for gasoline direct injection engine exhaust aftertreatment

Ou, Qisheng; Maricq, M. Matti; Pakko, James; Chanko, Timothy; Pui, David Y.H.

doi:10.1016/j.jaerosci.2019.04.003

Cited by 14 publications

(6 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The packing density of such filters can be readily controlled by controlling the fiber size and filter thickness. These fiber-based filters are also energy-efficient as they afford a relatively high permeability while maintaining good filtration efficiency. , Fiber-based filters can be manufactured using various materials, such as glass, thermoplastics, ceramics, cellulose, , and metal . Fiber-fabrication methods include meltblowing, island in the sea spinning, self-assembly, templating, , and electrospinning, , among which the latter is particularly useful for producing very fine fibers that can be easily modified via metal-plating and decoration with functional materials. − …”

Section: Introductionmentioning

confidence: 99%

“…21,22 Fiber-based filters can be manufactured using various materials, such as glass, 23 thermoplastics, 24 ceramics, 25 cellulose, 26,27 and metal. 28 Fiber-fabrication methods include meltblowing, 23 island in the sea spinning, 29 self-assembly, 30 templating, 31,32 and electrospinning, 33,34 among which the latter is particularly useful for producing very fine fibers that can be easily modified via metal-plating and decoration with functional materials. 34−36 Within this framework, a combined approach utilizing the electrostatic attraction of ESP and fiber-based filters has been introduced for efficient PM capture.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Transparent Metallized Microfibers as Recyclable Electrostatic Air Filters with Ionization

Kim

Seok

et al. 2020

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Air-quality control remains a major environmental concern as polluted air is a threat to public safety and health in major industrialized cities. To filter pollutants, fibrous filters employing electrostatic attraction have been widely used. However, such air filters suffer from some major disadvantages, including low recyclability and a significant pressure drop owing to clogging and a high packing density. Herein, we developed ionization-assisted electrostatic air filters consisting of nonwoven nanofibers. Ionization of particulate matter (PM) using air ionization enhanced the electrostatic attraction, thereby promoting efficient filtration. Metallization of the fibers facilitated strong electrical attraction and the consequent capture of PM of various sizes. The low packing density of the metallized fibers also facilitated efficient filtration of the PM, even at low driving pressures, which in turn reduced the energy consumption of the air-filtration device.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transparent Metallized Microfibers as Recyclable Electrostatic Air Filters with Ionization

Kim

Seok

et al. 2020

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…Dr. Qisheng Ou started as a post-doctoral research associate from the Washington University of St. Louis (with Da-Ren as his Ph.D. advisor) and is now manager of CFR/PTL. He has performed research on filtration topics and developed systems to: 1. produce high temperature agglomerates to evaluate engine exhaust filters (Ou et al, 2019); 2. develop methods for coating nanoparticle membrane on wall filters to improve efficiency; and 3. evaluate respirator/masks, dental tools dispersion, and decontamination methods (Ou et al, 2020(Ou et al, , 2021 Two recent Korean graduates helped to develop new fields in my group. Dr. Changhuk Kim made use of the soft X-ray technique to detect sub-ppb concentration of airborne molecular contaminants in real-time (Kim et al, 2015).…”

Section: Decade Of 2010's and Beyondmentioning

confidence: 99%

Reflection on 50 Years of Friendship and Collaboration on Aerosol Science and Technology

Pui

2023

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

“…Metal mesh has the advantage of being cost-effective but has lower capture efficiency, which makes it a challenge to filter fine particles [18]. Metal fibers typically possess about 60% porosity, and ultrafine fibers need to be used to filter fine particles, which can be very expensive [19]. On the other hand, metal powder sintered materials can have a wide range of particle sizes, from fine to large particles, and allow the fabrication of metal filters with complex pore structures through the use of foaming agents, particle size control, heat treatment or coating, and heating rate control [3,[20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Pore Characteristics of a Double-Layered Pore Structure Powder Filter Fabricated by the WPS Process

Lee,

Kim,

Kang

et al. 2024

Metals

View full text Add to dashboard Cite

In order to supply high-purity process gas in the semiconductor manufacturing process, a gas filter is used to remove particles that may be contained in the gas. However, because the gas filters currently in use have simple pore structures, there is a need to increase filtration efficiency through the development of filters with complex pore structures. In this study, a metal powder filter with double-layered pores was manufactured using a Wet Powder Spraying process (WPS) to increase the filtering efficiency of gas filters used in semiconductor manufacturing. The effects of the mixing ratio of spherical-shape and flake-shape powders and the rolling process on the filter’s characteristics were investigated. The filter’s performance, microstructure, and surface roughness were evaluated by measuring porosity and gas permeability. The results showed that as the ratio of flake-shaped powder decreased, the thickness of the coating layer and the porosity of the filter decreased. Additionally, it was observed that as the rolling process progressed, the non-uniform pore structure was oriented parallel to the cross-section of the filter regardless of the mixing ratio. Measurements found that the gas permeability of the uncoated filter support was the highest, and that gas permeability decreased as the proportion of spherical powder increased regardless of the average particle size of the mixed powder. Lower gas permeability was observed in rolled samples. A filtration efficiency of LRV 3 or higher was confirmed.

show abstract

Design and evaluation of a sintered metal fiber filter for gasoline direct injection engine exhaust aftertreatment

Cited by 14 publications

References 20 publications

Transparent Metallized Microfibers as Recyclable Electrostatic Air Filters with Ionization

Transparent Metallized Microfibers as Recyclable Electrostatic Air Filters with Ionization

Reflection on 50 Years of Friendship and Collaboration on Aerosol Science and Technology

Microstructure and Pore Characteristics of a Double-Layered Pore Structure Powder Filter Fabricated by the WPS Process

Contact Info

Product

Resources

About