Determination of Residual Oil in Biodiesel via Quasi-Isothermal Thermogravimetry (TGA-qISO) and Differential Scanning Calorimetry (DSC)
The present work aims to determine the levels of contaminant oils in biodiesel obtained from the residual oil of the industrial processing of Nile tilapia via Quasi-Isothermal Thermogravimetry (TGA-qISO) and Differential Scanning Calorimetry (DSC). For this purpose, mixtures of tilapia oil (OT) and...
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| author | Mário Rodrigues Cortes Joice Ferreira de Queiroz Marcio José Rodrigues Amorim David Johane Machate Euclésio Simionatto Carlos Eduardo Domingues Nazário Lincoln Carlos Silva de Oliveira |
| author_facet | Mário Rodrigues Cortes Joice Ferreira de Queiroz Marcio José Rodrigues Amorim David Johane Machate Euclésio Simionatto Carlos Eduardo Domingues Nazário Lincoln Carlos Silva de Oliveira |
| author_sort | Mário Rodrigues Cortes |
| collection | DOAJ |
| description | The present work aims to determine the levels of contaminant oils in biodiesel obtained from the residual oil of the industrial processing of Nile tilapia via Quasi-Isothermal Thermogravimetry (TGA-qISO) and Differential Scanning Calorimetry (DSC). For this purpose, mixtures of tilapia oil (OT) and biodiesel (BD) were prepared in the mass proportions of OT/BD (5:95 m/m), OT/BD (10:90 m/m), OT/BD (15:85 m/m), OT/BD (20:80 m/m), OT/BD (25:75 m/m) and OT/BD (30:70 m/m). These mixtures were used to construct the calibration curve of the TGA-qISO and DSC techniques. To evaluate the efficiency of these techniques, three samples were prepared at concentrations of 7.01 OT%, 16.66 OT% and 27.05 OT%. The data obtained show that the biodiesel/oil mixtures presented two stages of mass loss, the first between 100 and 200 °C, which was attributed to the decomposition of the biodiesel, and from 250 °C, to the decomposition of the oil. In the DSC curves of the mixtures, it was observed that as the concentration of tilapia oil in the mixtures increases, there is a decrease in the intensity of the peaks and a shift to a higher temperature range. Statistical tools show that the TGA-qISO measurements presented analytical curves with a correlation coefficient (r) of 0.9999, while in the DSC analyses, r of −0.9727 and −0.9903 were obtained. Analysis of variance (ANOVA) confirmed that there is no significant difference between the measurements performed by TGA-qISO and DSC. This result shows that both techniques can be used to determine the oil adulteration in biodiesel samples. |
| format | Article |
| id | doaj-art-6a17573f3cab4562aa8d2f2203495ce2 |
| institution | DOAJ |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj-art-6a17573f3cab4562aa8d2f2203495ce22025-08-20T03:16:42ZengMDPI AGEnergies1996-10732025-07-011813351810.3390/en18133518Determination of Residual Oil in Biodiesel via Quasi-Isothermal Thermogravimetry (TGA-qISO) and Differential Scanning Calorimetry (DSC)Mário Rodrigues Cortes0Joice Ferreira de Queiroz1Marcio José Rodrigues Amorim2David Johane Machate3Euclésio Simionatto4Carlos Eduardo Domingues Nazário5Lincoln Carlos Silva de Oliveira6Institute of Chemistry, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, BrazilInstitute of Chemistry, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, BrazilCampus Três Lagoas, Federal Institute of Mato Grosso do Sul, Tres Lagoas 79641-162, BrazilInstitute of Chemistry, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, BrazilDepartment of Chemistry, State University of Mato Grosso do Sul, Naviraí 79950-000, BrazilInstitute of Chemistry, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, BrazilInstitute of Chemistry, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, BrazilThe present work aims to determine the levels of contaminant oils in biodiesel obtained from the residual oil of the industrial processing of Nile tilapia via Quasi-Isothermal Thermogravimetry (TGA-qISO) and Differential Scanning Calorimetry (DSC). For this purpose, mixtures of tilapia oil (OT) and biodiesel (BD) were prepared in the mass proportions of OT/BD (5:95 m/m), OT/BD (10:90 m/m), OT/BD (15:85 m/m), OT/BD (20:80 m/m), OT/BD (25:75 m/m) and OT/BD (30:70 m/m). These mixtures were used to construct the calibration curve of the TGA-qISO and DSC techniques. To evaluate the efficiency of these techniques, three samples were prepared at concentrations of 7.01 OT%, 16.66 OT% and 27.05 OT%. The data obtained show that the biodiesel/oil mixtures presented two stages of mass loss, the first between 100 and 200 °C, which was attributed to the decomposition of the biodiesel, and from 250 °C, to the decomposition of the oil. In the DSC curves of the mixtures, it was observed that as the concentration of tilapia oil in the mixtures increases, there is a decrease in the intensity of the peaks and a shift to a higher temperature range. Statistical tools show that the TGA-qISO measurements presented analytical curves with a correlation coefficient (r) of 0.9999, while in the DSC analyses, r of −0.9727 and −0.9903 were obtained. Analysis of variance (ANOVA) confirmed that there is no significant difference between the measurements performed by TGA-qISO and DSC. This result shows that both techniques can be used to determine the oil adulteration in biodiesel samples.https://www.mdpi.com/1996-1073/18/13/3518adulterationoil/biodiesel blendsfilleting residue |
| spellingShingle | Mário Rodrigues Cortes Joice Ferreira de Queiroz Marcio José Rodrigues Amorim David Johane Machate Euclésio Simionatto Carlos Eduardo Domingues Nazário Lincoln Carlos Silva de Oliveira Determination of Residual Oil in Biodiesel via Quasi-Isothermal Thermogravimetry (TGA-qISO) and Differential Scanning Calorimetry (DSC) Energies adulteration oil/biodiesel blends filleting residue |
| title | Determination of Residual Oil in Biodiesel via Quasi-Isothermal Thermogravimetry (TGA-qISO) and Differential Scanning Calorimetry (DSC) |
| title_full | Determination of Residual Oil in Biodiesel via Quasi-Isothermal Thermogravimetry (TGA-qISO) and Differential Scanning Calorimetry (DSC) |
| title_fullStr | Determination of Residual Oil in Biodiesel via Quasi-Isothermal Thermogravimetry (TGA-qISO) and Differential Scanning Calorimetry (DSC) |
| title_full_unstemmed | Determination of Residual Oil in Biodiesel via Quasi-Isothermal Thermogravimetry (TGA-qISO) and Differential Scanning Calorimetry (DSC) |
| title_short | Determination of Residual Oil in Biodiesel via Quasi-Isothermal Thermogravimetry (TGA-qISO) and Differential Scanning Calorimetry (DSC) |
| title_sort | determination of residual oil in biodiesel via quasi isothermal thermogravimetry tga qiso and differential scanning calorimetry dsc |
| topic | adulteration oil/biodiesel blends filleting residue |
| url | https://www.mdpi.com/1996-1073/18/13/3518 |
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