Conversion of Constituents of Marine Fuel Oil into Aromatization and Carbonization on Pyrolysis

Abstract

Particulate in exhaust gas of diesel engine includes soots as aromatic compound and unburned carbon which constituents of fuel oil are changed. The major reason for the existence of particulate is due to incomplete burning of fuel oil. A method of combustion matching with properties of fuel oil can control the existence of particulate. To do so, it is necessary to clarify how constituents of fuel oil are aromatized and carbonized.
This paper presents the results of investigation into distribution of aromatized hydrocarbon compound in accordance with the number of benzene rings after introducing all of cracked gases produced by heated samples into gaschromatograph. The samples were Sa, Ar, and Re fractions that were separated from fuel oil C by column chromatograph. These fractions were pyrolyzed by an electric oven under desired temperature 400-800°C in an atomosphere of nitrogen.
From the results of measurements mutual relationship of these fractions was sufficiently estimated as follows: When fuel oil C heated at 800°C, aromatic compounds in cracked gases were more in number than other kinds of hydorocarbons; and Re content in the fuel oil influenced amount of unburned carbon.