Iodine value of tung biodiesel fuel using Wijs method is significantly lower than calculated value
Abstract The tung tree (Vernicia fordii) is a non-edible oil plant native to southern China and was introduced in Japan in the nineteenth century. The tree produces tung oil, which is composed of approximately 80% α-eleostearic acid (9c, 11t, 13t-octadecatrienoic acid), 7% linoleic acid, and 6% olei...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2021-10-01
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| Series: | Journal of Wood Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s10086-021-01987-3 |
| _version_ | 1819114820569399296 |
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| author | Toshisada Suzuki Kazuki Sumimoto Kazuhiro Fukada Takeshi Katayama |
| author_facet | Toshisada Suzuki Kazuki Sumimoto Kazuhiro Fukada Takeshi Katayama |
| author_sort | Toshisada Suzuki |
| collection | DOAJ |
| description | Abstract The tung tree (Vernicia fordii) is a non-edible oil plant native to southern China and was introduced in Japan in the nineteenth century. The tree produces tung oil, which is composed of approximately 80% α-eleostearic acid (9c, 11t, 13t-octadecatrienoic acid), 7% linoleic acid, and 6% oleic acid. Tung oil may be a non-edible source of biodiesel fuel (BDF) production. The iodine value (IV) is one of parameters to guarantee BDF quality, and the most common method for the determination of IV is the Wijs method. The IV can be calculated from the average molecular weight and the number of double bonds from the GC–MS data. In this study, the IVs of olive, castor, soybean, linseed, and perilla BDF using the Wijs method were found to be almost the same as the calculated IV. On the other hand, the IV of tung BDF by the Wijs method indicated a significantly lower value than that of the calculated value. To determine the cause of this discrepancy, the samples before and after halogenation using the Wijs method, were analyzed by 1H NMR. The conjugated double bond signals did not disappear, and a broad double bond signal remained in the tung BDF spectrum after halogenation. These results demonstrated that iodine, with a large atomic radius, could not react completely with the three conjugated double bonds in α-eleostearic acid. Therefore, the IV of tung BDF was significantly lower than the calculated value. |
| first_indexed | 2024-12-22T04:51:22Z |
| format | Article |
| id | doaj.art-4d7ba5b09f8b4a3bb706c6177529dca2 |
| institution | Directory Open Access Journal |
| issn | 1435-0211 1611-4663 |
| language | English |
| last_indexed | 2024-12-22T04:51:22Z |
| publishDate | 2021-10-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of Wood Science |
| spelling | doaj.art-4d7ba5b09f8b4a3bb706c6177529dca22022-12-21T18:38:29ZengSpringerOpenJournal of Wood Science1435-02111611-46632021-10-016711610.1186/s10086-021-01987-3Iodine value of tung biodiesel fuel using Wijs method is significantly lower than calculated valueToshisada Suzuki0Kazuki Sumimoto1Kazuhiro Fukada2Takeshi Katayama3Faculty of Agriculture, Kagawa UniversityFaculty of Agriculture, Kagawa UniversityFaculty of Agriculture, Kagawa UniversityFaculty of Agriculture, Kagawa UniversityAbstract The tung tree (Vernicia fordii) is a non-edible oil plant native to southern China and was introduced in Japan in the nineteenth century. The tree produces tung oil, which is composed of approximately 80% α-eleostearic acid (9c, 11t, 13t-octadecatrienoic acid), 7% linoleic acid, and 6% oleic acid. Tung oil may be a non-edible source of biodiesel fuel (BDF) production. The iodine value (IV) is one of parameters to guarantee BDF quality, and the most common method for the determination of IV is the Wijs method. The IV can be calculated from the average molecular weight and the number of double bonds from the GC–MS data. In this study, the IVs of olive, castor, soybean, linseed, and perilla BDF using the Wijs method were found to be almost the same as the calculated IV. On the other hand, the IV of tung BDF by the Wijs method indicated a significantly lower value than that of the calculated value. To determine the cause of this discrepancy, the samples before and after halogenation using the Wijs method, were analyzed by 1H NMR. The conjugated double bond signals did not disappear, and a broad double bond signal remained in the tung BDF spectrum after halogenation. These results demonstrated that iodine, with a large atomic radius, could not react completely with the three conjugated double bonds in α-eleostearic acid. Therefore, the IV of tung BDF was significantly lower than the calculated value.https://doi.org/10.1186/s10086-021-01987-3α-Eleostearic acidBDFConjugated fatty acidFAMEHalogenationIodine value |
| spellingShingle | Toshisada Suzuki Kazuki Sumimoto Kazuhiro Fukada Takeshi Katayama Iodine value of tung biodiesel fuel using Wijs method is significantly lower than calculated value Journal of Wood Science α-Eleostearic acid BDF Conjugated fatty acid FAME Halogenation Iodine value |
| title | Iodine value of tung biodiesel fuel using Wijs method is significantly lower than calculated value |
| title_full | Iodine value of tung biodiesel fuel using Wijs method is significantly lower than calculated value |
| title_fullStr | Iodine value of tung biodiesel fuel using Wijs method is significantly lower than calculated value |
| title_full_unstemmed | Iodine value of tung biodiesel fuel using Wijs method is significantly lower than calculated value |
| title_short | Iodine value of tung biodiesel fuel using Wijs method is significantly lower than calculated value |
| title_sort | iodine value of tung biodiesel fuel using wijs method is significantly lower than calculated value |
| topic | α-Eleostearic acid BDF Conjugated fatty acid FAME Halogenation Iodine value |
| url | https://doi.org/10.1186/s10086-021-01987-3 |
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