Abstract
In this study, the effects of mechanical vibration on the mechanical properties of ceramic diesel particulate filters (DPFs) were investigated. The goal is to determine how the mechanical vibration used in the regenerative ash cleaning process for these filters affects their mechanical integrity during subsequent reuse. Both virgin and vibrated DPF samples were subjected to com-pressive and 3-point flexural loading at three different loading rates along axial and tangential directions. Statistical analysis was conducted to determine the significance of variation in the compressive and flexural strengths of the DPFs as a result of exposure to mechanical vibration. The results show that there is no statistically significant difference in both compressive and flexural strengths of the virgin DPFs and the DPFs subjected to the same level of mechanical vibration typically used in ash cleaning of DPFs. When the intensity of vibration was doubled, the drop in compressive strength became statistically significant, but less than 10% under axial loading. However, no drop in flexural strength was observed for DPFs subjected to this high intensity of mechanical vibration. The safe threshold for mechanical vibration of ceramic filters is considered to be much higher than that currently used in vibration-based ash cleaning process.
Highlights
Fuel combustion in heavy duty diesel trucks, with no emission control system or retrofits, releases harmful particulate matter (PM) or soot into the atmosphere
The second category was subjected to mechanical vibration using maximum absolute acceleration of 221g, which is the intensity of vibration typically used by Filter Sensing Technology (FST) for ash removal during diesel particulate filters (DPFs) regeneration process [28]
Goren et al [29] determined the density of synthetic cordierite powder made from talc, diatomite, and alumina to range between 2.24 and 2.47 g/cm3 depending on the sintering temperature during processing
Summary
Fuel combustion in heavy duty diesel trucks, with no emission control system or retrofits, releases harmful particulate matter (PM) or soot into the atmosphere. Constituents of the diesel particulate matter can include carbon, inorganic oxides, and highly toxic hydrocarbons [1]. PM can penetrate into the lung, carrying toxic substances that can trigger respiratory and cardiovascular disease. Johnson and Parker [2] provided an overview of the epidemiological studies showing a strong correlation between cardiovascular diseases and air pollution. A World Health Organisation’s report suggested that 3% of cardiopulmonary and 5% of lung cancer diseases can be traced to the adverse effects of inhaled PM [3]. The toxicity of the airborne particles is reported to increase with decrease in particle size [4]. Seaton et al [5] reported that relatively large www.springer.com/journal/40145
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