TREATMENT OF SOOT MASS EMITTED FROM DIESEL ENGINE | ||
| Iraqi journal of mechanical and material engineering | ||
| Article 1, Volume 12, Issue 1, March 2012, Pages 140-156 | ||
| Author | ||
| Yassar K. A-M. Al- ansari and Muna H. Saed Al-Trahi | ||
| Abstract | ||
| Soot particles emitted from diesel engines to atmosphere pollute the environment air because many hydrocarbons known for their cancerous properties adsorb on its surfaces during the combustion processes of diesel fuel. These soot particles have very small diameters (less than 2.5 µm) and easy enter with air to the human respiratory system during the inhalation process. In order to control of soot emitted from four stroke, direct injection, air cooled and single cylinder diesel engine we executed two important parts; (1) Rate of soot mass emitted from this engine was measured inside the passageway of exhaust gases. One of the gravimetric methods for soot mass measurement in combustion systems was developed to measure the rate of soot emitted from diesel engine. (2) The rate of soot emitted from the engine was treated in a laboratory scale. Different diesel soot mass patterns were prepared according soot mass measured in limited time interval at different engine loads, and then the soot oxidation rates were studied using linear heating and isothermal heating inside the electrical furnace. The results of soot emitted measurements show that the rate of soot emitted significantly increases and reaches, at high engine loads, to 0.4533 mg/min because of highly reduced in A/F ratio. Then large amounts of diesel fuel inside the cylinder suffer from pyrolysis heating. The results of soot mass treatment with linear heating show that the rate of soot mass oxidation is significant at mid and high loads between the temperatures (500- 800 C o ). It can be concluded, from the results of soot mass oxidation at isothermal heating with different temperatures (600 C , 800 C o ), that the rates of soot mass oxidation at different soot masses (i.e. different engine loads) is approximately equal 25 mg/min. o , 700 C o | ||
| Keywords | ||
| Diesel engine; Soot emitted; Gravimetric method; Soot oxidation; Isothermal | ||
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