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Investigation of DPF-CRT Performance in Relation with Diesel Fuel Sulfur Content

Doozandegan Hokmabad, Mahdi | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 49592 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Hosseini, Vahid
  7. Abstract:
  8. Iran’s big cities air pollution is one of the major challenges to authorities in view of public health. Tehran City has been facing more and more air quality problems over the last decade. The criteria pollutants in Tehran are PM2.5, PM10. Particulates and especially ultrafine particles have been identified as the most toxic component of the polluting mixture. Considering diesel engine operation concepts, these types of engines are one of the main source emission of ultrafine particles, with more than 58%, in Tehran. So controlling particulates emitted from these sources, is one of the first steps to improve air quality. Diesel Particulate Filters (DPFs) are well-known and effective way to reduce particles number and mass. Continously regeneration trap (CRT) system is one of the well-known technology wordwide. Fuel quality and its high sulphur content were seemed to be a challenge of using DPF in the nation. So, “Investigation of DPF-CRT performance in relation with diesel fuel sulfur content” was choosed for study. Results show, PN efficiency was high (more than 98%) and was not influenced by fuel sulfur level. But using higher sulfur level fuel resulted in lower PM efficiency due to sulfate production. Diffrenet parameters effect on CRT performance like DPF and catalyst size, engine operation condition and etc were evaluated in this work. At the end, results show that regeneration quality decreased by fuel sulfur level increment. By increment of sulfur level of the fuel, NO2 production is much more inhibited and favorable temperature for NO to NO2 conversion increases, and regeneration aria became smaller. Considering Iranian local conditions for implementing CRT systems, fuel sulfur level decreament and using low sensitive catalyst to sulfur were suggested
  9. Keywords:
  10. Air Particulate Matter ; Catalyst Regeneration ; Diesel Fuel ; Diesel Particulate Filter (DPF) ; PN Efficiency ; Diesel Fuel Sulfur Level

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