Improving Vegetable Oil Properties by Transforming Fatty Acid Chain Length in Jatropha Oil and Coconut Oil Blends

Wahyudi,; Wardana, I.N.G.; Widodo, Agung Sugeng; Wijayanti, Widya

doi:10.3390/en11020394

Cited by 37 publications

(15 citation statements)

References 29 publications

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“…The free fatty acids in the distilled pyrolytic oil underwent transformation that changed the degree of unsaturation and the carbon chain's average length. The free fatty acid value was reduced from 5.6% (for pyrolytic oil) to 0.64% after the transesterification process, and this trend was also observed by Wahyudi et al [31]. This shows that fatty acid structure influences oil properties, and Kilonzi et al [32] observed that free fatty acids can lead to corrosion.…”

Section: Produced Biodiesel and Distilled Waste Tire Pyrolytic Oil Phsupporting

confidence: 68%

Performance Evaluation of Biodiesel Produced from Waste Tire Pyrolytic Oil as a Lubricant Additive in Oil Drilling Systems

2020

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This study investigates the performance of biodiesel produced from distilled waste tire pyrolytic oil through transesterification as a lubricant additive for aqueous drilling fluid systems. Aqueous-based drilling fluids have a high coefficient of friction as compared to oil-based drilling fluids. The inclusion of a biodiesel additive was for smooth application/operation. The friction-reducing physicochemical properties of the additive were analyzed and compared with the guidelinesof the United States specification (ASTM Standard) and the European specification (EN Standard). The chemical structure of the produced biodiesel was analyzed using gas chromatography–mass spectrometry (GC-MS). The results show that the distilled waste tire pyrolytic oil contains aliphatic, naphthenic, and aromatic hydrocarbons. The free fatty acid value reduced from 5.6% (for pyrolytic oil) to 0.64% after the transesterification process. A saponification value of 203.36 mg/g was recorded for the pyrolytic oil, and this value was also reduced to 197.35 mg/g after the transesterification process. The kinematic viscosity was reduced from 11.2 to 5.3 mm2/s for the obtained biodiesel, and this value is within the ASTM D6751 and EN 14214 standard values (1.9 to 6 and 3.5 to 5 mm2/s, respectively). The cetane number (47.75) was obtained for the biodiesel, and this is within the minimum range stipulated in ASTM D6751 guidelines. The produced biodiesel’s chemical structure analysis using GC-MS shows that it comprises of decanoic acid methyl ester and methyl ester. Furthermore, comparative analysis of the quantified friction-reducing physicochemical properties of the additive shows that the biodiesel produced from the distilled pyrolytic oil is a suitable additive for the improved lubrication of the friction-prone metallic parts of drill bits when water-based drilling fluids are employed for drilling oil and gas wells.

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Section: Produced Biodiesel and Distilled Waste Tire Pyrolytic Oil Phsupporting

confidence: 68%

Performance Evaluation of Biodiesel Produced from Waste Tire Pyrolytic Oil as a Lubricant Additive in Oil Drilling Systems

2020

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“…Nevertheless, it follows the order SOR < SON < SOJ, while values of AV and FFA are in the order SOR > SON > SOJ. The values of SG are related to their respective densities and SOJ having the highest of these values means it possess highest degree un-saturation of its fatty acid components (Wahyudi et al , 2018) and Adewuyi and Oderinde (2018) described such as a pointer to pi-electron system. This restricted pi-electron is shared with unoccupied d-orbital of iron and requires less energy for this bond to form complex with iron ions resulting in enhanced corrosion inhibition (Khanra et al , 2018).…”

Section: Resultsmentioning

confidence: 99%

“…Present in FFA are the hydrophilic groups (carbonyl) which are double-bonded and hydroxyl groups as shown in Figure 2. Double-bonded groups as described by Wahyudi et al (2018) are more unstable and react easily due to high mobility of their electron. These bonds of fatty acids are important in that they tend to cause increase in surface chemistry toward interaction with metal vacant orbital and hydroxyl groups have been associated with corrosion inhibition capabilities (Marzorati et al , 2019).…”

Section: Resultsmentioning

confidence: 99%

Free fatty acid influenced corrosion inhibition mechanisms of some inedible plants seeds oils on low alloyed medium-carbon steel in H₂SO₄

Adesusi

Adetunji

Erinle

et al. 2021

WJE

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Purpose The purpose of this paper is to investigate the mechanisms of low alloyed medium-carbon steel (LAMCS) corrosion in 0.5 M H2SO4 inhibited by seeds oils of rubber (SOR), Neem (SON) and Jatropha (SOJ) containing varying degree of free fatty acid (FFA). Design/methodology/approach Specific gravity, acid values and FFA compositions of oils were determined. Potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM) and X-ray diffraction (XRD) are techniques used to investigate the corrosion inhibition mechanisms with evaluated Gibbs free energy of adsorption. Findings Corrosion inhibition efficiencies of oils reached values >99% as obtained from PDP and EIS. Protective oxide layer was formed on LAMCS consequent on containment of carbonyl and hydroxyl groups in the FFA of SOR, SON and SOJ, respectively. The SOR and SOJ are found to be mixed inhibitors, whereas SON behaved as anodic inhibitor. Mechanism of adsorption of SOR was synergistic between physisorption and chemisorption, while SON and SOJ exhibited physisorption. SEM micrographs images showed that uninhibited sample exhibited thicker mass of corrosion products. Formation of protective oxide layer was confirmed by XRD diffractograms. Practical implications This study has shown that the need for modification of vegetable seed oils containing FFA is unnecessary as the hydroxyl and carbonyl groups of the FFA contained in the respective oil were found to be the center of adsorption of the oils on the steel surface. Hence, cost and by-products associated with modification of oils used as corrosion inhibitors are eliminated. Originality/value SOR, which has the highest percentage FFA, was found to be the most influential on the corrosion inhibition mechanism of LAMCS, specifically within 0.01–0.02 g/mL concentration. FFA contained in the respective seed oil aided formation of protective oxide layer at interface between H2SO4 and LAMCS, relative to amount composed.

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“…Lv et al [35] observed that the CFPP of the biodiesel made from palm oil is 16 • C, which is relatively high in comparison with other biodiesels produced from edible vegetable oils, such as rapeseed oil and soybean oil, due to the lower unsaturated fatty acids of palm oil. Wardana et al [36] found that the CFPP increases with the increase of the amount of long carbon-chain fatty acids. In addition, the lower iodine values, which imply lower amounts of unsaturated fatty acids, corresponded to lower CFPP values for the biodiesel produced by adding 0.05 wt.…”

Section: Cold Filter Plugging Point Of the Biodieselmentioning

confidence: 98%

Fluid Characteristics of Biodiesel Produced from Palm Oil with Various Initial Water Contents

Lin

2021

Processes

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Biodiesel is regarded as a significant alternative fuel to petrodiesel due to its excellent combustion features and renewable character. The water content in the reactant mixtures needs to be considered so as to retard the conversion rate and it is suggested to be kept as low as possible. The fluid characteristics of biodiesel might be affected by initial water content; however, the optimum ratio of water content added to raw oil for achieving superior fluid characteristics of biodiesel has not yet been studied. Hence, this study empirically investigated the influences of the initial water content added to raw feedstock oil on the fluid characteristics of biodiesel. The experimental results show that an adequate amount of water content in the reactant mixture was found effective for improving the transesterification reaction and, in turn, the fluid characteristics. The biodiesel made from raw oil with 0.05 wt. % water content added was observed to bear the lowest water content, acid value, and cold filter plugging point (CFPP) and, therefore, superior fluidity at low temperatures. The lower CFPP of biodiesel is attributed to its more unsaturated fatty acids and lower iodine value. In addition, the biodiesel produced from feedstock oil with 0.02 wt. % water added was observed to have the lowest iodine value but the highest kinematic viscosity. The optimum content of initial water added to palm oil for superior fluid characteristics of the biodiesel product is thus suggested to be in the range between 0.02 wt. % and 0.05 wt. %.

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Improving Vegetable Oil Properties by Transforming Fatty Acid Chain Length in Jatropha Oil and Coconut Oil Blends

Cited by 37 publications

References 29 publications

Performance Evaluation of Biodiesel Produced from Waste Tire Pyrolytic Oil as a Lubricant Additive in Oil Drilling Systems

Performance Evaluation of Biodiesel Produced from Waste Tire Pyrolytic Oil as a Lubricant Additive in Oil Drilling Systems

Free fatty acid influenced corrosion inhibition mechanisms of some inedible plants seeds oils on low alloyed medium-carbon steel in H₂SO₄

Fluid Characteristics of Biodiesel Produced from Palm Oil with Various Initial Water Contents

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Improving Vegetable Oil Properties by Transforming Fatty Acid Chain Length in Jatropha Oil and Coconut Oil Blends

Cited by 37 publications

References 29 publications

Performance Evaluation of Biodiesel Produced from Waste Tire Pyrolytic Oil as a Lubricant Additive in Oil Drilling Systems

Performance Evaluation of Biodiesel Produced from Waste Tire Pyrolytic Oil as a Lubricant Additive in Oil Drilling Systems

Free fatty acid influenced corrosion inhibition mechanisms of some inedible plants seeds oils on low alloyed medium-carbon steel in H2SO4

Fluid Characteristics of Biodiesel Produced from Palm Oil with Various Initial Water Contents

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Free fatty acid influenced corrosion inhibition mechanisms of some inedible plants seeds oils on low alloyed medium-carbon steel in H₂SO₄