The relation between lubricity and electrical properties of low sulfur diesel and diesel/biodiesel blends

Nicolau, Aline; Lutckmeier, Camila V.; Samios, Dimitrios; Gutterres, Mariliz; Piatnick, Clarisse M.S.

doi:10.1016/j.fuel.2013.09.026

Cited by 24 publications

(13 citation statements)

References 26 publications

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“…For comparison, some analysis for biodiesel content in diesel using other methods reported in literature are listed in Table . As it can be observed, our work presented better results in terms of analytical performance, when compared with other methods , mainly in terms of linearity, precision, and sensitivity.…”

Section: Resultsmentioning

confidence: 99%

“…Biodiesel can be used in its pure form (B100) or in many different concentrations , being the most common, B20 (20 % biodiesel, 80 % petroleum diesel), B5 (5 % biodiesel, 95 % petroleum diesel) and B2 (2 % biodiesel, 98 % petroleum diesel) . B20 and lower‐level blends usually do not require engine modifications .…”

Section: Introductionmentioning

confidence: 99%

“…B20 and lower‐level blends usually do not require engine modifications . Besides the positive environmental aspects, the presence of biodiesel in the blends with diesel, could act as a lubricity additive .…”

Section: Introductionmentioning

confidence: 99%

“…In this study, the dielectric constants of biofuels were found to have some relationship with the production raw materials (or sources). Other study is also reported in the literature about impedance measurements, in which the electrical properties of biodiesel were evaluated, through the relation between lubricity and electrical impedance properties of a series of diesel/biodiesel blends. This study showed that no linear relation of resistivity to lubricity was observed, however, the relation between lubricity or electrical resistivity and biodiesel addition is quantitatively described by an exponential function.…”

Section: Introductionmentioning

confidence: 99%

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Stainless Steel Electrodes to Determine Biodiesel Content in Petroleum Diesel Fuel by Electrochemical Impedance Spectroscopy

et al. 2016

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1IntroductionBiodiesel, mainly producedu sing basic liquid catalysts (KOH or NaOH)f or triglyceridest ransesterification [1,2] is one of the main biofuels used in the world, which can be mixed with petroleum diesel to form an alternative automobile fuel [3][4][5].Due to the biodiesel being one of the renewable fuels, the first reasonb ehindt he biofuels program is to reduce oil dependencyand increase the use of renewable,besides the warranty of increasing of energys ecurity.Biodiesel can be used in its pure form (B100) [6][7][8][9] or in many differentc oncentrations [10][11][12],b eing the most common, B20 (20 %b iodiesel, 80 %p etroleum diesel), B5 (5 %b iodiesel, 95% petroleum diesel) and B2 (2 % biodiesel, 98 %p etroleum diesel) [13].B 20 and lowerlevel blends usually do not require enginem odifications [14][15].B esides the positive environmental aspects, the presence of biodiesel in the blendsw ith diesel, could act as alubricity additive [12,13,16,17].Several alternativem ethodsf or quantitative determination of biodiesel contenti nd iesel-biodiesel blends have been reported in literature [18][19][20][21][22][23][24][25][26][27][28][29][30],s uch as x-ray spectroscopy [18],l iquid and gas chromatography [19][20][21], near infrared spectroscopy [22,23],f ouriert ransform mid-infrared spectroscopy (FT-IR) [25,26],u ltraviolet absorptions pectroscopy [27],f luorescence spectroscopy [30],a sw ell as electrochemical impedance spectroscopy (EIS) [31][32][33].Although some of these methodsare effective,m ajor drawbacks have been observed in the analysis.Theu se of electroanalyticalm ethods [34][35],i ncluding the method EIS [36-37]h as been as ubject of great interest in the last decade in many areas. Them ethod EIS, which uses the dielectric properties to measure the content of biodiesel, seems to be quite promising.Actually,t he application of EIS to study low conductivity media such as oil products,e thanol,a nd biodiesel have been reported in literature [10,11,37,38,39,40],a nd the high ohmic drop seemed to be not ac oncern [41,42]. One of the EIS advantages for biodiesel content measurements is its efficiency being able to obtain, in as ingle experiment, all informationa bout the solution, the interface and the electrodes urface,t hrough the measured parameters, such as resistance,c apacitance,a nd inductance, Abstract:T he blending ratio of biodiesel in petroleum diesel has become one of the most important parameters to ensuret he quality of diesel/biodieselb lend. This paper presents af ast and simple method based on electrochemical impedance spectroscopy to determinet he biodiesel contenti nd ieself uel. Differentf rom the methodr eported in the literature, using ap air of two identicals creen printed carbon pastee lectrodes,i nt he present work we used two electrodes made from 304 stainless steel with dimensions of 0.8 0.3 cm for the EIS measurements.I mproved results were obtained in terms of sensitivity,s tability of measurements,e lectrode reuse,a nd cost. In this procedure the charge transfer resista...

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stainless Steel Electrodes to Determine Biodiesel Content in Petroleum Diesel Fuel by Electrochemical Impedance Spectroscopy

et al. 2016

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“…Such relationships can simplify tedious experiments and will cause in saving time and coast. For example Nicolau et al (2014) found the relationship between lubricity and electrical resistivity of diesel and diesel/biodiesel blends.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Impedance of Neutral Base Oils

Pourfarzad

Semnani

2014

Petroleum Science and Technology

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Solvent neutral 100 (SN-100), SN-150, SN-500, and SN-650 base oils have been investigated by electrochemical impedance spectroscopy (EIS). The investigation has been followed in the frequency range of 100 kHz to 1 mHz. The results indicate that in all cases upon decrease of frequency, the impedance (Z) will be raised up. Also obtained data designates that at each applied frequency, Z values vary in the order: SN-100 < SN-150 < SN-500 < SN-650. In all cases, plots of phase angle versus log of frequency are nearly peak shaped. Based on the composition of base oils, the possible reasons for the different observations has been discussed. The equivalent circuit consists of a parallel constant phase element and polarized resistance (R ct ), in series with solution resistance (R s ). Linear correlation has been observed between R ct and viscosity at 40 or 100 • C, as well as log R ct and viscosity index or specific gravity.

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Sliding Wear Behavior of an AISI 440B Martensitic Stainless Steel Lubricated with Biodiesel and Diesel–Biodiesel Blends

Venske

Castro

Costa

et al. 2018

J. of Materi Eng and Perform

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The aim of this work was to analyze the effect of biodiesel and diesel-biodiesel blends on the sliding wear behavior of AISI 440B martensitic stainless steel. Lubricated tests were performed on AISI 440B martensitic stainless steel samples using Brazilian commercial diesel (containing 7 vol.% biodiesel), pure biodiesel, and diesel-biodiesel blends with biodiesel additions of 20% v/v, 30% v/v, and 50% v/v. Nonlubricated tests were also performed. The stainless steel was analyzed in the as-received condition (annealed) and after heat treatments (quenched and tempered at different temperatures), using a pin-on-disk device with an alumina pin, at a 1.8 m/s sliding speed, 14.7 N load, and 4400 m sliding distance, following the ASTM G99-04 Standard. Wear track widths, wear coefficients, and wear track surfaces were analyzed by optical and scanning electron microscopy. The results showed that AISI 440B presented the worst wear behavior in the dry condition with a microstructure characterized by a ferritic matrix and dispersed carbides (annealed condition). The wear resistance increased with the increase in biodiesel content due to the matrix strengthening by the martensitic transformation (heat-treated condition). When the biodiesel content was superior to 50% v/v, a reverse result was found. The observed wear mechanism was abrasive in all conditions. A 2 1.35 power law coefficient characterized the wear coefficient as a function of biodiesel content for the annealed condition and a 2 0.95 power law coefficient for the heat-treated conditions.

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The relation between lubricity and electrical properties of low sulfur diesel and diesel/biodiesel blends

Cited by 24 publications

References 26 publications

Stainless Steel Electrodes to Determine Biodiesel Content in Petroleum Diesel Fuel by Electrochemical Impedance Spectroscopy

Stainless Steel Electrodes to Determine Biodiesel Content in Petroleum Diesel Fuel by Electrochemical Impedance Spectroscopy

Electrochemical Impedance of Neutral Base Oils

Sliding Wear Behavior of an AISI 440B Martensitic Stainless Steel Lubricated with Biodiesel and Diesel–Biodiesel Blends

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