Effect of Sulfur Dioxide Added to Induction Air on Wear of Diesel Engine

An experimental investigation of the corrosive influence of SO2 relative to H2SO4 of marine engine cylinder liners

“…9,10 Adding SO 2 into the charge air of a fired diesel engine has the same effect as increasing the fuel sulphur content-more SO 3 /H 2 SO 4 will form. From the authors point of view, the distinct SO 2 wear is therefore not examined when SO 2 is added into the charge air of a fired engine, as attempted by Nagaki and Korematsu 15,16 as well as Naegeli and Marbach. 3 In the present experiments, the cylinder gas temperature peaks below 800 C. At this temperature, the SO 2 to SO 3 conversion is basically frozen, and the distinct SO 2 wear can therefore be examined.…”

“…Nevertheless, SO 2 can dissolve (absorb) in formulated motor oils, and the influence of SO 2 wear in combustion engines has been studied in the past. Nagaki and Korematsu added SO 2 to the charge air of a light‐duty single‐cylinder diesel engine and found that piston ring wear increases with SO 2 addition. They reasoned that SO 2 absorbs in the cylinder liner oil film where it forms sulphuric acid and other sulphates that cause abrasive and corrosive wear.…”

Modelling of temporal and spatial evolution of sulphur oxides and sulphuric acid under large, two-stroke marine engine-like conditions using integrated CFD-chemical kinetics

“…These plots are provided in Fig. 13 absorb into the engine lubricating oil film and potentially contribute to cylinder wear [1].…”

“…During the in-cylinder combustion process where air is in excess, most of the sulphur is oxidised to sulphuric dioxide (SO ). The absorption of SO 2 into the engine lubricating oil film may play a role in cylinder wear [1]. Meanwhile, a fraction of SO 2 is subsequently oxidised to sulphuric trioxide (SO 3 ) [2] and SO 3 reacts with water vapour (H 2 O) to form sulphuric acid vapour (H 2 SO 4 ).…”

Modeling the condensation of sulfuric acid and water on the cylinder liner of a large two-stroke marine diesel engine

“…Moreover lube oil absorption of SO2 in the presence of water may add to corrosion due to the formation of sulfurous acid [14]. Nagaki [15] modeled SO2 uptake in an oil film, compared results with experimental wear rates of piston rings and concluded that SO2 increases wear. Anyway, the solubility of SO2 depends on the oil type.…”