Gasoline Particulate Filter with Membrane Technology to Achieve the Tight PN Requirement

Obata, Shogo; Furuta, Yasuyuki; Ōhashi, Tatsuya; Aoki, Takashi

doi:10.4271/2023-01-0394

Cited by 2 publications

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Particulate Filters for Combustion Engines to Mitigate Global Warming. Estimating the Effects of a Highly Efficient but Underutilized Tool

Mayer,

Wyser

et al. 2024

Emiss. Control Sci. Technol.

View full text Add to dashboard Cite

Particulate filters are state-of-the-art and are used in internal combustion engines worldwide to eliminate carcinogenic nanoparticles. Health studies estimate that this prevents about one million premature deaths annually. What is less known and often neglected is their equally powerful effect on mitigating global warming. This is because these ultrafine particles form stable aerosols in the atmosphere, absorb sunlight, and heat the atmosphere due to their jet-black color. In addition, once deposited on the ground, they reduce albedo especially when deposited on ice or snow. They also thin clouds and reduce their reflectivity. In this paper, we estimate for the first time the cumulative effect of more than 300 million particulate filters currently installed globally on vehicles, showing that, while they reduce ~ 0.5 Mt of soot per year, their effect on slowing global warming is equivalent to reducing 1 Bt of CO2 per year or about one-third of the CO2 emissions of all European Union Member States combined. Despite its strong potential, this highly efficient, proven, and low-cost technology is not yet regarded as a priority in curbing global warming, even though it is possibly the easiest and quickest to implement. If used in retrofitting more diesel and petrol engines worldwide, it could triple the aforementioned effect. While modern internal combustion engines are on track to be replaced with zero-emission vehicles, it is also crucial, and we strongly suggest that, in the interim, all remaining internal fossil fuel combusting engines be fitted with particulate filters. Evidence is presented in this paper that the potential benefits of such retrofit on climate and human health will be impactful and lasting.

show abstract

Particulate Filters for Combustion Engines to Mitigate Global Warming. Estimating the Effects of a Highly Efficient but Underutilized Tool

Mayer,

Wyser

et al. 2024

Emiss. Control Sci. Technol.

View full text Add to dashboard Cite

show abstract

Improved Coated Gasoline Particulate Filters for China 7 and US Tier 4 Legislations

Schoenhaber,

Kawashima,

Gotthardt

et al. 2024

SAE Technical Paper Series

View full text Add to dashboard Cite

<div class="section abstract"><div class="htmlview paragraph">The impending emission regulations in both China (CN7) and the United States (Tier 4) are set to impose more stringent emission limits on hydrocarbons (HC), carbon monoxide (CO), nitrogen oxides (NOx), and particulate matter (PM). CN7 places particular emphasis on reducing particulate number (PN) thresholds, while the forthcoming United States Tier 4 legislation is primarily concerned with reducing the allowable particulate matter (PM) to an assumed limit of 0.5 mg/mile. Given the more stringent constraints on both PN and PM emissions, the development of enhanced aftertreatment solutions becomes imperative to comply with these new regulatory demands. Coated Gasoline Particulate Filters (cGPFs) play a pivotal role as essential components for effective PN and PM abatement. These filters are typically deployed in one of two configurations: close-coupled to the turbocharger positioned downstream of a primary three-way catalyst (TWC) or located further downstream of the exhaust system in an underfloor configuration. Each application imposes distinct technical requirements and specifications on cGPFs, necessitating tailored solutions for both close-coupled and underfloor applications. This research introduces a novel generation of particulate filters optimized for pressure drop and underfloor applications, which exhibit improved performance in terms of light-off and hot conversion efficiency while maintaining comparable backpressure levels to its predecessors. Moreover, a suite of advanced technologies for close-coupled applications is presented, featuring improved three-way conversion efficiency and enhanced thermal durability compared to previous iterations. Significantly, these new technologies demonstrate equivalent three-way conversion capabilities, irrespective of whether employing bi-metallic Pd/Rh or tri-metallic Pt/Pd/Rh Platinum-group-metal (PGM) architectures. Lastly, the study undertakes an analysis of the trade-off between backpressure and the gain in three-way conversion activity provided by these innovative technologies.</div></div>

show abstract

Gasoline Particulate Filter with Membrane Technology to Achieve the Tight PN Requirement

Cited by 2 publications

References 10 publications

Particulate Filters for Combustion Engines to Mitigate Global Warming. Estimating the Effects of a Highly Efficient but Underutilized Tool

Particulate Filters for Combustion Engines to Mitigate Global Warming. Estimating the Effects of a Highly Efficient but Underutilized Tool

Improved Coated Gasoline Particulate Filters for China 7 and US Tier 4 Legislations

Contact Info

Product

Resources

About