| PHYSICOCHEMICAL ANALYSIS OF TWO AGED DIESEL
PARTICULATE FILTERS PLACED AT CLOSE COUPLED AND
UNDER FLOOR POSITIONS OF THE VEHICLES |
| Dongyoung Jin1, Cha-Lee Myung1, Jeong-hwan Kim2, Simsoo Park1 |
1Korea University
2Korea Petroleum Quality & Distribution Authority |
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| ABSTRACT |
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This work investigated the aged diesel particulate filter substrate analysis procedure and ash physicochemical
analysis method with various instruments such as CT, XPS, SEM and XRD. The procedure for analyzing two DPFs aged with
the same lubricant oil but located in different locations was followed to determine the ash formation mechanism. We analyzed
DPFs in their non-destructive state with X-ray computed tomography to determine the form how the ash was deposited, and
after decanning the DPF, we verified ash formation with micro X-CT. A scanning electron microscope was used to determine
the morphology of the ash and DPF substrates, and the distributions of the components were analyzed using energy dispersive
spectroscopy. The ash pellets were used for X-ray photoelectron spectroscopy analysis to determine the percentages of
different components, and the crystal structure of the ash powder was determined using a X-ray diffractometer. The result of
this study is that the deposition patterns and composition of the ash components differ depending on where the DPF is
mounted due to differences in temperature and pressure experienced during aging. Calcium is accounted for the largest
percentage of the materials that formed the ash. |
| Key Words:
Lubricant oil, PM (Particulate Matter), Ash, DPF (Diesel Particulate Filter), X-CT (Computed Tomography),
X-CT (Computed Tomography), XRD (X-ray Diffractometer), FE-SEM, EDS (Energy Dispersive Spectroscopy) |
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Corresponding Author.
Simsoo Park , Email. 
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