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Investigating the Performance of Non-Catalyzed Diesel Particulate Filters Operating in Real World Driving Conditions

Maleklou, Saeed | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50693 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Hosseini, Vahid; Kazemzadeh Hannani, Siamak
  7. Abstract:
  8. Studies in recent years show that more than 57% of all suspended particles released from stationary and mobile sources in Tehran are from diesel vehicles. Reducing the release of this pollutant can be very effective in improving the air condition of Tehran. At the moment, Diesel Particulate Filters (DPF) are considered as the most effective and available technology to reduce particulate emissions from diesel engine exhaust. In this research, the results of the tests on two types of non-catalyzed DPFs under Iran’s conditions have been analyzed. In the motor test, the efficiency of the filters is monitored in the state of operation with the engine representing the country's diesel engines and adjacent to two levels of sulfur. It has been observed that at a high level of 7000 ppm sulfur, due to the production of sulfate particles, the mass efficiency of the filter is very low, and is on average of 52%. While the number efficiency the filters is independent of the sulfur content of the fuel and exceeds 96%. The durability of these filters has been measured after several months of installation on a number of urban buses, utilizing portable devices in different modes of bus operation. The results of measuring the number and mass of particles in real driving mode of the bus showed that after 8 months of filter installation, the number and mass filtering efficiency of the installed filter were 99.7% and 98% respectively. The total emission factor of nitrogen oxides and unburned hydrocarbons is 3 times the euro II standard and equal to 5.46 [g/km]
  9. Keywords:
  10. Emission Factor ; Diesel Particulate Filter (DPF) ; Diesel Engines ; Non-Catalyzed Diesel Particulat Filter ; Real Driving Emissions

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