Crystallisation and Melting Behavior of Methyl Esters of Palm Oil

Foon, Cheng Sit; Liang, Yung Chee; Dian, Noor Lida Habi Mat; May, Choo Yuen; Hock, Chuah Cheng; Ngan, Ma Ah

doi:10.3844/ajassp.2006.1859.1863

Cited by 19 publications

(12 citation statements)

References 4 publications

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“…This behavior could be related to the fact that the APO has about 50% of unsaturated fatty acids composition, while HOPO has around 65%. In fact, unsaturated compounds present lower melting points than saturated ones [28,32,34,35].…”

Section: Thermal Analysis Of the Oilsmentioning

confidence: 99%

Thermal and Physical Properties of Crude Palm Oil with Higher Oleic Content

et al. 2021

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Interspecific hybridization of oil palms (E. guineensis × E. oleifera) was initially exploited to provide disease resistance and, consequently, increased oleic acid content. Besides the growing importance of this cultivar to the market, there is little information about this oil’s properties. In this context, this study aimed to determine a comprehensive physicochemical and thermal characterization of hybrid palm oil (HOPO) compared with the better-known African palm oil (APO). Differences in the distribution of fatty acids, carotenoids, and tocols were observed. Minor differences in density and viscosity were found between the oils, with no relevance for the materials’ processing design. Nevertheless, HOPO showed unique crystallization behavior, which potentially can affect industrial operations, such as fractionation. HOPO did not present the two thermal characteristic regions of APO, attributed to olein and stearin fractions. The HOPO demonstrated a decrease in the melting point of more than 3 °C in relation to APO, and a reduction in the crystallization point of more than 6 °C. Furthermore, besides the higher content of unsaturated fatty acids, HOPO was more stable than APO due to a higher antioxidant content. These results could be useful to establish operation conditions for processes using palm oil from hybrid oil palm.

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Section: Thermal Analysis Of the Oilsmentioning

confidence: 99%

Thermal and Physical Properties of Crude Palm Oil with Higher Oleic Content

et al. 2021

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“…However, for blends of saturated and unsaturated FAEEs the exact value of the COT is difficult to predict. A previous study reported that the position of the first crystallization peak depends very much on the content of saturated methyl esters. As the percentage of saturated methyl esters decreases, the crystallization temperature of the first exothermic peak also decreases accordingly.…”

Section: Results and Discussionmentioning

confidence: 96%

“…The process was repeated twice to verify repeatability. The rate of temperature was chosen as 5 °C/min following previous studies in FAMEs which reported a good combination of resolution characteristics and timeliness. ,, Figure shows the DSC curve obtained with the analysis of the palm biodiesel and how the COT is chosen.…”

Section: Methodsmentioning

confidence: 99%

Estimation of Cold Flow Performance and Oxidation Stability of Fatty Acid Ethyl Esters from Lipids Obtained from Escherichia coli

et al. 2015

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The increase in energy demand and the decrease in oil reserves encourage the search for alternative energy resources. Biodiesel composed of fatty acid ethyl esters (FAEEs) is a promising alternative fuel. The more extended use of fatty acid methyl esters over FAEEs comes from the higher cost of ethanol compared to methanol. But the genetic development of microorganisms able to produce bioethanol in extensive quantities or directly FAEEs omitting the transesterification process can diminish the cost of FAEEs and make them competitive. This work shows how to predict the cold flow properties and the oxidation stability of biodiesel composed of FAEEs using only some milligrams of the sample. Prediction of the cloud point, the pour point, and the cold filter plugging point has been made with a multiple linear correlation using the total percentage of unsaturated compounds and the average length of the carbon chains and with a simple linear correlation using the crystallization onset temperature. The oxidation stability was correlated through a multiple linear regression using as parameters the total percentage of monounsaturated esters and the bis-allylic position equivalents index. All of the regression models show statistical significance and a high level of correlation.

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“…In the case of triglycerides, the variation in the composition of fatty acids strongly contribute to the formation of different crystalline forms (Hagemann et al, 1972; Sharma et al, 2009). Foon et al (2006) reported a detailed study of the influence of the fatty acid chain of the methyl ester of palm oil and found that the increase in the percentage of saturated fatty acids shifts the values of the melting points to higher and positive temperatures. Angulo et al (2018) found for the TMP ester with fish residue oil the p.p.…”

Section: Resultsmentioning

confidence: 99%

Green lubricants production from Nile tilapia waste and prediction of physical properties through molecular dynamics simulations

Moreira

Ferreira

Neto

et al. 2022

J Americ Oil Chem Soc

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Fish farming is a worldwide growing activity and a large amount of residues is produced in this process. The present work describes a cleaner and sustainable way to produce new lubricants from fish waste oil. Oil extracted from the Nile tilapia (Oreochromis niloticus) viscera was utilized as raw material to produce basic oil for lubricants. The products were synthesized by esterification with polyols, trimethylolpropane (TMP) and pentaerythritol (PE), using p-toluenesulfonic acid (p-TSA) as catalyst. The synthesized esters were characterized by infrared (IR) and nuclear magnetic resonance (NMR). Computational methods were used to predict the physical characteristics of the material. In addition, the main physicochemical properties were evaluated, as well as the thermal behavior and toxicity of the products against Artemia salina. The synthesized esters showed high viscosity indexes (VI > 150) and viscosities that fit the degree of application ISO-46 and 150. Molecular dynamics simulations indicated that at room temperature the lubricants Tilapia fatty acid -trimethylolpropane ester (T-TMPE) and Tilapia fatty acid -pentaerythritol ester (T-PEE) are in liquid and gel states, respectively, confirming the experimental data. The products did not present toxicity against A. salina. In this research, we reinforce the potential of using tilapia oil from waste to produce green lubricants as a strategy to reduce damage to the environment, as well as the use of computational methods that collaborate to predict physical properties of lubricants.

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Crystallisation and Melting Behavior of Methyl Esters of Palm Oil

Cited by 19 publications

References 4 publications

Thermal and Physical Properties of Crude Palm Oil with Higher Oleic Content

Thermal and Physical Properties of Crude Palm Oil with Higher Oleic Content

Estimation of Cold Flow Performance and Oxidation Stability of Fatty Acid Ethyl Esters from Lipids Obtained from Escherichia coli

Green lubricants production from Nile tilapia waste and prediction of physical properties through molecular dynamics simulations

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