Search Results

The effect of oxygen-containing additives on the toxic emission of a SI engine, has been studied. The relationship between the chemical structure of the additives, their oxygen content and molecular mass, and the chemical composition of the exhaust gas toxic compounds (CO, HC and NOx), has been established. More than 20 samples of fuel blends containing oxygenates, were tested. The tested oxygenates represent three large chemical structure categories which can be found in the chemical industry wastes - alcohols, ethers and ketones. The tests were performed using a four-cylinder, spark-ignition engine. In order to determine the optimum types of fuel additives for the suppression of carbon monoxide, hydrocarbons and nitro-oxygens, fuel blends containing 10% oxygenates with different oxygen content (from 9% to 50%) and molecular mass (from 32 to 170) were examined.