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Implications of Hydrated Ash on Filtration Efficiency and Performance of Particulate Filters (DPF, GPF, and SCRF)—a Perspective
Name
40825_2022_210_ReferencePDF.pdf
Size
1.02 MB
Format
Adobe PDF
Checksum (MD5)
8e82932df2a222de2a40a1990d61cba5
Author(s)
Bagi, Sujay
Kamp, Carl J.
Date Issued
April 12, 2022
Publisher
Springer International Publishing
Citation
Bagi, Sujay and Kamp, Carl J. 2022. "Implications of Hydrated Ash on Filtration Efficiency and Performance of Particulate Filters (DPF, GPF, and SCRF)—a Perspective."
Version
Author's final manuscript
Abstract
Abstract
Particulate filters are used to meet current and future emission-control standards for particle mass and particle number requirements. However, with vehicle operation, non-combustible material (termed as “ash”) collects in the filter leading to an increase in ∆P, lower fuel economy, reduced soot storage space, and lower conversion rates for exhaust gases such as HC, NO, and NO2. In most cases, CaSO4 originating from detergent formulations in the lubricant forms the major component of inorganic ash; CaSO4 undergoes hydration cycles forming gypsum, along with semi-/hemi-hydrates through a series of transformations that are a function of temperature, time, and humidity. The exact nature of these transformations and the interaction of hydrated species with the filter substrate are poorly understood. The current work highlights the recent serendipitous discovery of hydrated ash structures and their deleterious effects on the filter and informs the automotive emission control community about the strategies for effective management of the filter.
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DOI of Published Version
https://doi.org/10.1007/s40825-022-00210-z
