Abstract
This work investigates the effects of diesel oxidation catalyst (DOC) on emissions of HC, CO, NO x on a diesel bench under the conditions of two steady speeds with various load and five operating modes. In addition, the carbon composition of PM is analyzed by DRI thermal/optical carbon analyzer. It was found that DOC could significantly decrease the emissions of HC, CO, but had no conspicuous effect on NO x emission. DOC was effective in reducing PM concentration by 25%~40% and the reduction efficiency of nuclear mode was 16%~36%. With the continuous increment of load, the number transformation efficiency of total particle as well as nuclear mode decreases gradually, while number transformation efficiency of accumulation mode increases gradually. Further, DOC is effective in reducing organic carbon (OC) emissions through the reduction of HC, the decrement of OC contributes above 67% to the total PM decrement, while EC contributes only lower 9%.
| Original language | English |
|---|---|
| Pages (from-to) | 460-464 |
| Number of pages | 5 |
| Journal | Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology |
| Volume | 32 |
| Issue number | 5 |
| Publication status | Published - May 2012 |
Keywords
- Diesel oxidation catalyst
- Elemental carbon
- Organic carbon
- Particulate matter