TREATMENT OF SOOT MASS EMITTED FROM DIESEL ENGINE

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 thecombustion processes of diesel fuel. These soot particles have very small diameters (less than 2.5 µm) and easy enter with air tothe human respiratory system during the inhalation process. In order to control of soot emitted fromfour stroke, direct injection, air cooled and single cylinder diesel engine we executed two importantparts; (1) Rate of soot mass emitted from this engine was measured inside the passageway ofexhaust gases. One of the gravimetric methods for soot mass measurement in combustion systemswas developed to measure the rate of soot emitted from diesel engine. (2) The rate of soot emittedfrom the engine was treated in a laboratory scale. Different diesel soot mass patterns were preparedaccording soot mass measured in limited time interval at different engine loads, and then the sootoxidation rates were studied using linear heating and isothermal heating inside the electricalfurnace. The results of soot emitted measurements show that the rate of soot emitted significantlyincreases and reaches, at high engine loads, to 0.4533 mg/min because of highly reduced in A/Fratio. 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 Co). It can be concluded, fromthe results of soot mass oxidation at isothermal heating with different temperatures (600 C,800 Co), that the rates of soot mass oxidation at different soot masses (i.e. different engine loads) isapproximately equal 25 mg/min. o, 700 Co