Fibrous filters are currently being considered for the removal of exhaust particulates from the exhaust of diesel-powered vehicles. One approach under development Is to regenerate these filters on-board by intermittently elevating the exhaust temperature and Igniting the particulate deposits. An analytical model which simulates this regeneration process has been developed. The model predicts that the process consists of three stages. During the first stage, regeneration is slow while a temperature peak develops inside the filter. The second stage starts with the onset of a rapid combustion around the temperature peak. During this stage, two reaction fronts are formed inside the filter and move toward the opposite ends of the filter. The downstream peak grows with time and is responsible for the maximum solid temperature (hot spot) in the filter. The final stage is a slow combustion and starts after the downstream section is regenerated. A nonuniform distribution of fiber size along the filter is suggested as an effective technique for lowering the hot spot temperature.
|Original language||English (US)|
|Number of pages||6|
|Journal||Industrial and Engineering Chemistry Process Design and Development|
|State||Published - Apr 1 1983|
ASJC Scopus subject areas
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering