Open AccessFormation and burning of soot particles in a diesel cylinder when working on ethanol-fuel emulsion
Author(s) -
В. А. Лиханов,
A. A. Anfilatov
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/862/3/032044
Subject(s) - soot , combustion , pyrolysis , diesel fuel , diesel engine , cylinder , ignition system , chemical engineering , diesel exhaust , carbon black , chemistry , exhaust gas recirculation , waste management , materials science , organic chemistry , thermodynamics , automotive engineering , mechanical engineering , engineering , physics , natural rubber
The chemistry of the processes of formation and burning of soot particles in a diesel cylinder is associated with a large number of chemical reactions and is very complicated. During combustion, the fuel supplied to the engine cylinder does not completely burn out. Complete combustion is hindered by a number of factors: the limited mixture formation and combustion processes in time, the imperfection of the fuel supply and atomization processes, and the uneven concentration of oxygen and fuel. So, with a lack of air and a high temperature of the air charge in the engine cylinder, the supplied fuel undergoes pyrolysis with the formation of products of incomplete oxidation: carbon monoxide, aldehydes, carboxylic acids, soot, and various heavy hydrocarbons. Soot has a large specific surface area, up to 75-80 m 2 / g, which leads to its high absorbent capacity. Therefore, when it settles in the engine’s exhaust system, soot absorbs unburned hydrocarbons like a sponge, forming black, ointment-like deposits. With increasing temperature of the exhaust gases, for example, with an increase in engine load, these deposits are prone to ignition.