μ-CT Investigation into the Impact of a Fuel-Borne Catalyst Additive
on the Filtration Efficiency and Backpressure of Gasoline Particulate
Filters 04-15-02-0006
This also appears in
SAE International Journal of Fuels and Lubricants-V131-4EJ
An investigation into the pre-ashing of new gasoline particulate filters (GPFs)
has demonstrated that the filtration efficiency of such filters can be improved
by up to 30% (absolute efficiency improvement) when preconditioned using ash
derived from a fuel-borne catalyst (FBC) additive. The additive is typically
used in diesel applications to enable diesel particulate filter (DPF)
regeneration and can be added directly into the fuel tank of the vehicle. This
novel result was compared with ash derived from lube oil componentry, which has
previously been shown to improve filtration efficiency in GPFs. The lube
oil-derived ash utilized in this work improved the filtration efficiency of the
GPF by approximately 30%, comparable to the ash derived from the FBC additive.
The undesirable impact of the ash deposit on backpressure increases was also
investigated, and it was established that the use of the FBC additive resulted
in a lower backpressure increase versus the equivalent ash loading from lube oil
components. Following the real-world vehicle testing and GPF evaluation, the
used, intact filters were further analyzed, using micro-focus computed
tomography (μ-CT) to assess the ash distribution within the filters. It was
established that the FBC-derived ash was predominantly deposited near the outlet
plug region of the filter, whereas the lube oil-derived ash was also distributed
within the channel walls, which resulted in a higher GPF backpressure. The μ-CT
results were therefore key to establishing the differences between these two
ash-providing sources and enabled a better understanding of the effect of filter
microstructure on macroscopic performance, i.e., GPF efficiency and backpressure
results.
Citation: Price, S., Vamvakeros, A., Jacques, S., Beale, A. et al., "μ-CT Investigation into the Impact of a Fuel-Borne Catalyst Additive on the Filtration Efficiency and Backpressure of Gasoline Particulate Filters," SAE Int. J. Fuels Lubr. 15(2):121-136, 2022, https://doi.org/10.4271/04-15-02-0006. Download Citation
Author(s):
Stephen W.T. Price, Antonis Vamvakeros, Simon D.M. Jacques, Andrew M. Beale, Kathryn E. Rankin, Nathan Hollingsworth, David Coultas, Amy Challinor
Affiliated:
Finden Ltd., UK, University College London, Department of Chemistry, UK Research Complex at Harwell, UK, University of Southampton, UK, Infineum UK Ltd., UK
Pages: 16
ISSN:
1946-3952
e-ISSN:
1946-3960
Related Topics:
Lubricating oils
Particulate filters
Fuel tanks
Lubricants
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