Effect of Alternative Liquid Fuels on the Exhaust Particle Size Distributions of a Medium-Speed Diesel Engine

Abstract

We mainly aimed to determine how alternative liquid fuels affect the exhaust particle size distributions (PSD) emitted by a medium-speed diesel engine. The selected alternative fuels included: circulation-origin marine gas oil (MGO), the 26/74 vol. % blend of renewable naphtha and baseline low-sulfur marine light fuel oil (LFO), and kerosene. PSDs were measured by means of an engine exhaust particle sizer from the raw exhaust of a four-cylinder, turbocharged, intercooled engine. During the measurements, the engine was loaded by an alternator, the maximum power output being set at 600 kW(e) at a speed of 1000 rpm. The partial loads of 450, 300, 150 and 60 kW(e) were also used for measurements. At each load, the PSDs had a distinct peak between 20 and 100 nm regardless of fuel. Relative to the other fuels, circulation-origin MGO emitted the lowest particle numbers at several loads despite having the highest viscosity and highest density. Compared to baseline LFO and kerosene, MGO and the blend of renewable naphtha and LFO were more beneficial in terms of total particle number (TPN). Irrespective of the load or fuel, the TPN consisted mainly of particles detected above the 23 nm size category.

Performance and emission characterization of a common-rail compression-ignition engine fuelled with ternary mixtures of rapeseed oil, pyrolytic oil and diesel

“…The differences in chemical composition of the fuel, including the increased sulphur content of the TPO, do not translate towards distinguishable effect on EGO or PM mass. However, more profound differences may occur in particulates size distribution when fuels of different feedstock are used [57,58]. This issue might affect the feasibility of crude oils with TPO addition as drop-in fuels and should be addressed in dedicated research.…”

Performance and Emissions of a Medium-Speed Engine Driven with Sustainable Options of Liquid Fuels

“…The exhaust did not contain high numbers of nucleation mode particulates but the accumulation mode peaks were usually higher by two orders of magnitude than those of nucleation mode tops [45]. Up to 75% load, the size distributions peaked within the size range of 30 to 50 nm, as illustrated for 75% load in Figure 14.…”

“…The temperatures of cooling water, charge air in the manifold, and the exhaust upstream of the turbine had to be stable. -Figure 3 shows a diagram of the experimental setup [45].…”

“…Figure15. Total particulate number (TPN) of exhaust within the particle size range of 5.6 to 560 nm (after[45])…”

The Use of Acoustic Emission to Diagnosis of Fuel Injection Pumps of Marine Diesel Engines

“…Although due to tribological processes, the internal wear in the B-P pair is unavoidable, the degree and progress of wear are largely dependent on operational and maintenance conditions, and on use of fuel oil quality and the possibility of its purification and filtration in ship installations. In addition, due to the steadily deteriorating quality of fuel oils and catalytic additives (Cat-fines) used in the refining processes of crude oil to reduce sulfur content to comply with environmental requirements [5,6], the problem of the deterioration of working conditions in a FIP become significant.…”