Water Separation Challenge for Brazilian Diesel Engine

Yoshino, Fernando Jun; Marques, Gisela Ablas; Ferrari, Felipe

doi:10.4271/2013-01-1693

Cited by 6 publications

(5 citation statements)

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“…Other studies [13,15,35] found that the IFT and water separation behaviour of blends containing more than 20% biodiesel are very similar to pure biodiesel (B100), and the change in both parameters does not hold as the proportion of biodiesel increases up to B100.…”

Section: Equation 3 Settling Velocity Of a Water Droplet Dispersed Inmentioning

confidence: 95%

“…However, the addition of biodiesel can reduce water separation efficiency owing to the influence of biodiesel on IFT. It has also been reported that the total water content of diesel measured in the tank of a vehicle can be as high as 5000 (v v ) ppm [4,26], and pure biodiesel (B100) can have a water saturation content of ≥1300 ppm [13,15,35]. Moreover, Yoshino et al [13] using the ISO 16332 test stand methodology, claimed that the addition of just 5% biodiesel (B5) can reduce water separation efficiency in the fuel from 95% to 85% due to a decrease in the fuel IFT (22.9 to 12.9 ) as well as increase the separation time (13s to 150s -according to the sedimentation test, ASTM D 1401).…”

Section: Equation 3 Settling Velocity Of a Water Droplet Dispersed Inmentioning

confidence: 99%

“…An emulsion generation test rig equipped with an online droplet size measurement system findings in the literature [13,15,35]. However, it is noteworthy that the trends in the IFT data for the fuels containing biodiesel and monoolein are not the same when the blend proportions increase to B100 and M1000 respectively.…”

Section: Water Droplet Size Distribution (Dsd)mentioning

confidence: 99%

“…Evaluation of the water separation performance of filters depends on their end use, and standards such as SAE J1488 and ISO 16332 define the test conditions required [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…The approach is based on the theory that a low IFT will result in small droplet sizes (< 25 m [13]), which should simulate more challenging fuels such as EN590 diesel. Fuel additives in EN590 fuel are known to act as surfactants, which are amphiphilic and able to lower the interfacial tension (IFT) of oil/water emulsion phases resulting in small, stable droplets that are a challenge for water separation.…”

Section: Introductionmentioning

confidence: 99%

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Limitations of Monoolein in Simulating Water-in-Fuel Characteristics of EN590 Diesel Containing Biodiesel in Water Separation Testing

Arouni

Farooq

Goswami³

et al. 2018

SAE Int. J. Fuels Lubr.

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In modern diesel fuel a proportion of biodiesel is blended with petro-diesel to reduce environmental impacts. However, it can adversely affect the operation of nonwoven coalescing filter media when separating emulsified water from diesel fuel. This can be due to factors such as increasing water content in the fuel, a reduction in interfacial tension (IFT) between the water and diesel, the formation of more stable emulsions, and the generation of smaller water droplets. Standard water/diesel separation test methods such as SAE J1488 and ISO 16332 use monoolein, a universal surface-active agent, to simulate the effects of biodiesel on the fuel properties as part of water separation efficiency studies. However, the extent to which diesel/monoolein and diesel/biodiesel blends are comparable needs to be elucidated if the underlying mechanisms affecting coalescence of very small water droplets in diesel fuel with a low IFT are to be understood. To address this challenge, test fuels composed of reference diesel (REF diesel)/biodiesel and REF diesel/monoolein were experimentally studied to determine fuel properties such as IFT, water content, and dynamic viscosity, as well as online droplet size distributions with reference to IFT. It was found that biodiesel and monoolein do not influence the IFT of water in fuel in a comparable manner and resulting water droplet size distributions are substantially different. Fuels blended with biodiesel exhibited higher viscosity and water content than fuel freshly blended with monoolein. Online measurement of water droplet sizes revealed substantially smaller water droplets in biodiesel blends compared to monoolien blends at the same IFT measured using offline tensiometry. These results may be instructive for the development of standard test methods that simulate the effect of biodiesel blends in fuel-water separation, as well as for improving the design of fuel-water separation systems.

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Section: Equation 3 Settling Velocity Of a Water Droplet Dispersed Inmentioning

confidence: 95%

Section: Equation 3 Settling Velocity Of a Water Droplet Dispersed Inmentioning

confidence: 99%

Section: Water Droplet Size Distribution (Dsd)mentioning

confidence: 99%

“…Evaluation of the water separation performance of filters depends on their end use, and standards such as SAE J1488 and ISO 16332 define the test conditions required [13,14].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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