Mitigating crystallization of saturated FAMES (fatty acid methyl esters) in biodiesel. 3. The binary phase behavior of 1,3-dioleoyl-2-palmitoyl glycerol – Methyl palmitate – A multi-length scale structural elucidation of mechanism responsible for inhibiting FAME crystallization

Mohanan, Athira; Darling, Bruce; Bouzidi, Laziz; Narine, Suresh S.

doi:10.1016/j.energy.2015.04.011

Cited by 22 publications

(15 citation statements)

References 36 publications

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“…Crystallization of esters depends on the length of fatty acid chain and interactions between the molecules. 32 Saturated fatty acids have higher melting points compared to unsaturated ones and they crystallize at temperatures higher than the unsaturated fatty acids. 33 DSC is used to determine the crystallization onset temperature of the samples and can be plotted on the graph against heat flow.…”

Section: Differential Scanning Calorimetry Analysismentioning

confidence: 99%

Evaluation, characterization, and engine performance of complementary fuel blends of butanol–biodiesel–diesel from Aleurites moluccanus as potential alternative fuels for CI engines

Atabani

Mekaoussi

Uğuz

et al. 2018

Energy & Environment

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Biodiesel has gained worldwide attention due to its renewable aspects. However, it needs more quality improvement. Recently, butanol has been considered as a favorable alternative fuel or additive over methanol and ethanol in compression ignition (CI) engines. In this regard, the present work deals with the evaluation of butanol–diesel–biodiesel blends as potential alternative fuels. In this work, biodiesel has been produced from Aleurites moluccanus oil followed by blending with Euro-diesel and butanol. Important characteristics such as kinematic viscosity, density and cloud point besides FT-IR, UV-vis spectra, TGA, DSC and NMR (13C and 1H) were analyzed. Some important engine and emission performance parameters, such as BP, BSFC, CO, HC, NOx and EGT were also studied in this work. Results revealed that blending butanol and Euro-diesel with biodiesel improves the properties of pure biodiesel such as kinematic viscosity (2.41–3.55 mm2/s) and density (841.8–884.6 kg/m3), while maintaining an acceptable range for cold flow properties that are analogous to Euro-diesel. In addition, reduction in BP (24.65–26.35%), HC (52.57–38.71%), and CO (39.18–30.4%) was observed for all the blends at full load compared to Euro-diesel. However, increases in both BSFC (38.17–41.14%) and NOx (24.18–8.35%) were observed. Overall, the blends appear to be good alternatives to biodiesel–diesel blends. Thus, butanol–biodiesel–diesel blends can be considered as potential sustainable fuels for fossil diesel.

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Section: Differential Scanning Calorimetry Analysismentioning

confidence: 99%

Evaluation, characterization, and engine performance of complementary fuel blends of butanol–biodiesel–diesel from Aleurites moluccanus as potential alternative fuels for CI engines

Atabani

Mekaoussi

Uğuz

et al. 2018

Energy & Environment

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“…In the case of Figure 4c, with a smaller melting point difference, the changes in the liquidus and solidus temperatures appear to show a eutectic system (as was obtained from the DAG/FAME system), suggesting that these TAGs were also immiscible with FAMEs in the solid phase. However, several researchers (Baker et al, 2015;Mohanan et al, 2015) have reported that certain combinations of TAGs and FAMEs can form solid compounds (that is, mixed crystals). As an example, a TAG having one stearic and two oleic acid moieties was found to form solid compounds when combined with methyl stearate in a 1:1 ratio (Baker et al, 2015).…”

Section: Tag and Fame Mixturesmentioning

confidence: 99%

Solidification behavior of acylglycerols in fatty acid methyl esters and effects on the cold flow properties of biodiesel

Seniorita

Minami

Kawamoto

2021

J Americ Oil Chem Soc

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The formation of precipitates in biodiesel (comprising fatty acid methyl esters [FAMEs] obtained from plant oils) can lead to the clogging of fuel filters. Such precipitates are often caused by the solidification of acylglycerols (monoacylglycerols [MAGs], diacylglycerols [DAGs], and triacylglycerols [TAGs]) that have higher melting points than FAMEs. Based on our prior study on the solidification behavior of MAG/FAME binary mixtures, the present work investigated the behavior of various DAGs and TAGs combined with FAMEs. Differential scanning calorimetry was used to clarify the effects of acylglycerols on the cold-flow properties of biodiesel. When DAGs and TAGs were added to FAMEs, the liquidus temperatures (above which the mixtures were completely liquid) increased steeply even at low concentrations. This same behavior was observed previously in trials with MAGs, indicating that all acylglycerols readily precipitate in combination with FAMEs. However, thermodynamic analyses established that the reasons for such precipitation were different for different compounds. MAGs precipitates because they contain two hydroxyl groups and therefore have a low affinity for FAMEs. In contrast, TAGs precipitates as a result of their high enthalpies of fusion (which in turn are caused by high molecular weights), while both factors affect the precipitation of DAGs. A non-solidsolution thermodynamic model that assumes a eutectic system was found to accurately predict the liquidus temperatures of binary and multicomponent mixtures containing various acylglycerols with FAMEs.

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“…It is possible that the mechanisms driving the agglomeration of IOA-alkyl ester crystals were affected by the cooling rate applied to measure PP (1.5°C/min). Fatty acid derivatives are polymorphic and can take different crystalline structures depending on the cooling rate [18,19,30,31]. A faster cooling rate causes the formation of less stable crystals whereas a slow rate causes the more stable and high-melting b-form crystals.…”

Section: Low Temperature Property Studiesmentioning

confidence: 99%

Synthesis and low temperature characterization of iso‐oleic ester derivatives

Ngo

Latona

Wagner

et al. 2016

Euro J Lipid Sci & Tech

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Three new iso‐oleic ester derivatives (i.e., isopropyl ester (IOA‐iPrE, 6), n‐butyl ester (IOA‐n‐BuE, 7), and 2‐ethylhexyl ester (IOA‐2‐EHE, 8)) were synthesized from iso‐oleic acid (IOA, 4) using a standard esterification method. These esterified alcohols were chosen because of their bulky and branched‐chain alkyl groups which can reduce melting point in comparison to a smaller alkyl group such as methyl ester. The differential scanning calorimetry (DSC), cloud point and pour point results showed that esters 6, 7, and 8 had much lower melting transition temperatures and cold flow properties than the methyl (IOA–FAME, 5) and parent 4. The oxidative and thermal stability by pressure (P‐DSC) and thermogravimetric analysis (TGA) results also showed a very similar trend where the bulkier and branched‐chain alkyl esters had better stability than the smaller headgroup esters. Practical applications: Since saturated fats have high melting points, they are solids which can be harmful to our health and can cause damage to machinery. There is an urgent need to develop methods to produce fats with low melting points to replace the unwanted fats. In this paper, a series of modified branched‐chain fatty acid ester derivatives (i.e., iso‐oleic acid esters) that are liquid at room temperature with enhanced fluidity were synthesized. These ester fats have been found to perform much better than the original fatty acids and saturated fats. These findings are important as these iso‐oleic ester fats can potentially replace solid materials which are often problematic at low temperatures. Iso‐oleic ester derivatives containing bulky and branched‐chain alkyl groups exhibit reduce melting point in comparison to a smaller alkyl group such as methyl ester.

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Mitigating crystallization of saturated FAMES (fatty acid methyl esters) in biodiesel. 3. The binary phase behavior of 1,3-dioleoyl-2-palmitoyl glycerol – Methyl palmitate – A multi-length scale structural elucidation of mechanism responsible for inhibiting FAME crystallization

Cited by 22 publications

References 36 publications

Evaluation, characterization, and engine performance of complementary fuel blends of butanol–biodiesel–diesel from Aleurites moluccanus as potential alternative fuels for CI engines

Evaluation, characterization, and engine performance of complementary fuel blends of butanol–biodiesel–diesel from Aleurites moluccanus as potential alternative fuels for CI engines

Solidification behavior of acylglycerols in fatty acid methyl esters and effects on the cold flow properties of biodiesel

Synthesis and low temperature characterization of iso‐oleic ester derivatives

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