Investigations on Storage and Oxidative Stability of Biodiesel from Different Feedstocks Using the Rancimat Method, Infrared Spectroscopy, and Chemometry

Menezes, Larissa C. de; Sousa, Eliane R. de; Silva, Gilmar S. da; Marques, Aldaléa Lopes Brandes; Viégas, Helmara Diniz Costa; Santos, Marcelo J. Castro dos

doi:10.1021/acsomega.2c01348

Cited by 9 publications

(2 citation statements)

References 38 publications

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“…In a study carried out by De Menezes et al [52], the principal component analysis associated with the FT-MIR-ATR was used to investigate the alteration of biodiesel that can be degraded when exposed to certain weather conditions such as air, light, temperature, and humidity, consequently changing its quality parameters, among them the acidity index. Thus, the model proposed a total variation of 75% of the proposed environmental conditions.…”

Section: Pca Modeling Resultsmentioning

confidence: 99%

FT-MIR-ATR Associated with Chemometrics Methods: A Preliminary Analysis of Deterioration State of Brazil Nut Oil

da Silva,

Ferreira,

Alamar

et al. 2023

Molecules

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Brazil nut oil is highly valued in the food, cosmetic, chemical, and pharmaceutical industries, as well as other sectors of the economy. This work aims to use the Fourier transform infrared (FTIR) technique associated with partial least squares regression (PLSR) and principal component analysis (PCA) to demonstrate that these methods can be used in a prior and rapid analysis in quality control. Natural oils were extracted and stored for chemical analysis. PCA presented two groups regarding the state of degradation, subdivided into super-degraded and partially degraded groups in 99.88% of the explained variance. The applied PLS reported an acidity index (AI) prediction model with root mean square error of calibration (RMSEC) = 1.8564, root mean square error of cross-validation (REMSECV) = 4.2641, root mean square error of prediction (RMSEP) = 2.1491, R2cal (calibration correlation coefficient) equal to 0.9679, R2val (validation correlation coefficient) equal to 0.8474, and R2pred (prediction correlation coefficient) equal to 0, 8468. The peroxide index (PI) prediction model showed RMSEC = 0.0005, REMSECV = 0.0016, RMSEP = 0.00079, calibration R2 equal to 0.9670, cross-validation R2 equal to 0.7149, and R2 of prediction equal to 0.9099. The physical–chemical analyses identified that five samples fit in the food sector and the others fit in other sectors of the economy. In this way, the preliminary monitoring of the state of degradation was reported, and the prediction models of the peroxide and acidity indexes in Brazil nut oil for quality control were determined.

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Section: Pca Modeling Resultsmentioning

confidence: 99%

FT-MIR-ATR Associated with Chemometrics Methods: A Preliminary Analysis of Deterioration State of Brazil Nut Oil

da Silva,

Ferreira,

Alamar

et al. 2023

Molecules

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“…Therefore, when the oxidative stability of fuel falls outside the specified limits, it can adversely affect fuel stability during storage as well as vehicle performance. This instability can lead to the formation of deposits on engine parts, potentially causing clogging in the fuel filter [14].…”

Section: En Iso 3104mentioning

confidence: 99%

Biodiesel production from edible and non-edible biomasses and its characterization

Emmanouilidou,

Lazaridou,

Mitkidou

et al. 2023

E3S Web Conf.

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Biodiesel is considered one of the most viable renewable alternatives to its petroleum-derived counterpart. It can be produced from various sources, mainly via homogeneously alkali-catalyzed transesterification. Nevertheless, as the demand for edible oils grew for food and fuel, non-edible oils emerged as a more appealing choice for producing biodiesel. Waste cooking oils (WCOs) comprise an alternative and low-cost feedstock that are produced in vast quantities and can be used for biodiesel production. This study compares biodiesel properties produced by an uncooked sunflower oil obtained from a local bio-industry and a WCO sample collected from a fast food shop. Results showed that most biodiesel samples’ properties in both cases met the EN 14214 specifications. GC-MS chromatographs were similar in terms of fatty acid methyl esters (FAMEs) composition. However, oxidation stability for both biodiesel samples and viscosity for the WCO biodiesel sample were out of specifications. Further investigation is required to improve biodiesel properties and optimize production conditions.

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Absorption and fluorescence profiles of biodiesel blends from Acrocomia aculeata kernel and pulp oils: Optical responses of α‐tocopherol and β‐carotene under thermal degradation

Passos,

Segovia,

Lescano

et al. 2024

J Americ Oil Chem Soc

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The search for new, more sustainable, and ecologically safe sources of energy has encouraged studies involving the production of biofuels from non‐petroleum origin. Among the options for new energy sources, biodiesel is an important substitute for polluting fuels, with several cleaner and greener oils being suggested, especially new plant resources. This field evolved significantly in the last decades, and new raw materials for biodiesel production are welcome for new advances. In this vein, a potential source for biodiesel production is explored here, that is, two distinct biodiesels produced from different parts of the Acrocomia aculeata fruits—pulp and kernel. Results showed that biodiesel from pulp had an induction period of 12.77 h, ~3× higher than biodiesel from kernel, 3.96 h; iodine values in biodiesel pulp were ~7.5× higher than the kernel, 82 and 11 g I2/100 g, respectively. These results are due to the profile of different antioxidants in these biodiesels and unsaturations in the fatty acids carbon chains. The degradation behavior of these biodiesels was monitored by the acid value via the traditional titration method, attesting the blend oxidation until 48 h of thermal degradation. In parallel, UV–Vis absorbances and fluorescence compared pure biodiesels and its blends with β‐carotene and α‐tocopherol standards. The wavelength at 445 nm was efficient in monitoring the degradation of blends rich in β‐carotene—B25, B50, B75, B100. Primary and secondary compounds produced in the oxidative process were monitored at 230 and 270 nm, respectively, showing the pulp biodiesel antioxidant effect on the kernel one. Additionally, from the fluorescence contour map, it was possible to analyze regions of excitation/emission capable of monitoring the degradation process of the blends, found 415 nm, similar to expected for kernel and pulp oils described in the literature. Thus, the study provides information about changes in the optical profiles of biodiesel naturally rich in tocopherol and carotenoid antioxidants, encouraging the development of analytical methods based on absorption and fluorescence spectroscopies for this important resource of vegetable oils.

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Investigations on Storage and Oxidative Stability of Biodiesel from Different Feedstocks Using the Rancimat Method, Infrared Spectroscopy, and Chemometry

Cited by 9 publications

References 38 publications

FT-MIR-ATR Associated with Chemometrics Methods: A Preliminary Analysis of Deterioration State of Brazil Nut Oil

FT-MIR-ATR Associated with Chemometrics Methods: A Preliminary Analysis of Deterioration State of Brazil Nut Oil

Biodiesel production from edible and non-edible biomasses and its characterization

Absorption and fluorescence profiles of biodiesel blends from Acrocomia aculeata kernel and pulp oils: Optical responses of α‐tocopherol and β‐carotene under thermal degradation

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