Variation of solid fraction with cold flow properties of biodiesel produced from waste frying oil

Evcil, Ali; Al-Shanableh, Filiz; Savas, Mahmut A.

doi:10.1016/j.fuel.2017.11.055

Cited by 12 publications

(13 citation statements)

References 11 publications

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“…For a greater degree of accuracy, PP measurements were made with a resolution of 1 • C instead of the specified increment of 3 • C. The description of the CP and PP measurement process is explained in Reference [30]. Additionally, the description of the CFPP measurement procedure is explained in Reference [37]. In this study, the cold flow properties were manually measured, i.e., the solidification process was followed visually.…”

Section: Cold Flow Measurementmentioning

confidence: 99%

“…Two gaskets were placed into the test jar to ensure the jacket fitted jacket and there was a uniform air gap of 5 mm in the radial direction between the test jar and the jacket. The Newtonian technique based on CA-CCA used to characterize properties of the material is discussed in detail in References [37][38][39]. The heat balance equation for the solidifying can be rewritten as:…”

Section: Cold Flow Measurementmentioning

confidence: 99%

“…The plotting of the rate change of temperature with respect to time versus (T − T 0 ) can be helpful to identify the regions of the liquid phase, solid phase and two phases (liquid and solid phases). Changes in the UA MC p value in the liquid and solid states depend on the composition of fatty acid methyl esters and their crystallization [37]. The term UA MC p in Equation (2) remained constant and was derived from the slope of the straight line as 0.000744 s −1 , 0.000772 s −1 and 0.000763 s −1 for WCME1, WCME2 and WCME3, respectively (see Figure S1 as supplementary material).…”

Section: Computer-aided Cooling Curve Analysis Of Biodiesel Samplesmentioning

confidence: 99%

“…Furthermore, the Newtonian zero curve plots (Z c ) for six selected samples along with cooling curves and dT dt are also given in Figures 9 and 10. The area between (Z c ) and the dT dt curves from the start to the end of freezing of the biodiesel is directly related to the total latent heat for solidification [37]. The ratio of the incremental cumulative area, A n , to the total area, A Total , gives the incremental solid fraction ( f s ) n of the sample during solidification [37].…”

Section: Computer-aided Cooling Curve Analysis Of Biodiesel Samplesmentioning

confidence: 99%

“…A Total can also be calculated from Equation (49) by substituting n = n Total − 1, where n Total is the total number of data points. The new corresponding temperature T f s n was calculated by averaging the two successive temperatures, as given in Equation (51) [37]:…”

Section: Computer-aided Cooling Curve Analysis Of Biodiesel Samplesmentioning

confidence: 99%

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Effect of Biodiesel Mixture Derived from Waste Frying-Corn, Frying-Canola-Corn and Canola-Corn Cooking Oils with Various ‎Ages on Physicochemical Properties

2019

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Waste frying, corn and canola cooking oil biodiesels were produced through the transesterification ‎process and their properties were measured. Three different mixtures of biodiesel with the same blending ratio, namely, WCME1 (frying-corn biodiesel), WCME2 (frying-canola-corn biodiesel) and WCME3 (canola-corn biodiesel), were prepared. The effect ‎of ‎blending ‎biodiesel with various ages ‎‎(zero months (WCME3), eight months (WCME1), and 30 months (WCME2)) on kinematic ‎viscosity and‎ density was investigated under varying temperature and volume fraction. It was found that the kinematic viscosity of WCME2 remained within the ranges listed in ASTM D445 (‎1.9–6.0‎ mm2/s) and EN-14214‎ (‎3.5–5.0‎ mm2/s) at 30 months. It was also observed that both viscosity and density decreased as the temperature increased for each fuel sample. In order to improve the cold flow properties of the samples, the Computer-Aided ‎Cooling Curve Analysis (CACCA) technique was used to explore the crystallization/melting ‎profiles of ‎pure ‎methyl biodiesel as ‎well their blends. The results show that pure WCME2 has the lowest cold flow properties compared to other samples. Furthermore, 10 ‎correlations ‎were developed, tested and compared with generalized ‎correlations for the ‎estimation of the ‎viscosity and densities of pure biodiesels and their ‎blends. These equations depend on the temperature and volume fraction of pure components as well as the properties of the fuel.

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Section: Cold Flow Measurementmentioning

confidence: 99%

Section: Cold Flow Measurementmentioning

confidence: 99%

Section: Computer-aided Cooling Curve Analysis Of Biodiesel Samplesmentioning

confidence: 99%

Section: Computer-aided Cooling Curve Analysis Of Biodiesel Samplesmentioning

confidence: 99%

Section: Computer-aided Cooling Curve Analysis Of Biodiesel Samplesmentioning

confidence: 99%

See 3 more Smart Citations

Effect of Biodiesel Mixture Derived from Waste Frying-Corn, Frying-Canola-Corn and Canola-Corn Cooking Oils with Various ‎Ages on Physicochemical Properties

2019

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Improvements in the stability of biodiesel fuels: recent progress and challenges

Masudi

Muraza²,

Jusoh

et al. 2022

Environ Sci Pollut Res

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Fewer fossil fuel deposits, price volatility, and environmental concerns have intensified biofuel-based studies. Saccharification, gasification, and pyrolysis are some of the potential methods of producing carbohydrate-based fuels, while lipid extraction is the preferred method of producing biodiesel and green diesel. Over the years, multiple studies have attempted to identify an ideal catalyst as well as optimize the abovementioned methods to produce higher yields at a lower cost. Therefore, this present study comprehensively examined the factors affecting biodiesel stability. Firstly, isomerization, which is typically used to reduce unsaturated fatty acid content, was found to improve oxidative stability as well as maintain and improve cold flow properties. Meanwhile, polymers, surfactants, or small molecules with low melting points were found to improve the cold flow properties of biodiesel. Meanwhile, transesterification with an enzyme could be used to remove monoacylglycerols from oil feedstock. Furthermore, combining two natural antioxidants could potentially slow lipid oxidation if stainless steel, carbon steel, or aluminum are used as biodiesel storage materials. This present review also recommends combining green diesel and biodiesel to improve stability. Furthermore, green diesel can be co-produced at oil refineries that are more selective and have a limited supply of hydrogen. Lastly, next-generation farming should be examined to avoid competing interests in food and energy as well as to improve agricultural efficiency.

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Environmental mitigation of sludge combustion via two opposite modifying strategies: Kinetics and stabilization effect

Chen

Sun

Shao

et al. 2018

Fuel

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Variation of solid fraction with cold flow properties of biodiesel produced from waste frying oil

Cited by 12 publications

References 11 publications

Effect of Biodiesel Mixture Derived from Waste Frying-Corn, Frying-Canola-Corn and Canola-Corn Cooking Oils with Various ‎Ages on Physicochemical Properties

Effect of Biodiesel Mixture Derived from Waste Frying-Corn, Frying-Canola-Corn and Canola-Corn Cooking Oils with Various ‎Ages on Physicochemical Properties

Improvements in the stability of biodiesel fuels: recent progress and challenges

Environmental mitigation of sludge combustion via two opposite modifying strategies: Kinetics and stabilization effect

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