Oxidation stability of biodiesel fuel as prepared by supercritical methanol
| Autor: | Shiro Saka, Hiroaki Imahara, Jiayu Xin |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Biodiesel
Supercritical water oxidation General Chemical Engineering Organic Chemistry food and beverages Energy Engineering and Power Technology complex mixtures Supercritical fluid chemistry.chemical_compound Diesel fuel Fuel Technology chemistry Chemical engineering Biofuel Biodiesel production Organic chemistry Peroxide value Methanol |
| Zdroj: | Fuel. 87:1807-1813 |
| ISSN: | 0016-2361 |
| DOI: | 10.1016/j.fuel.2007.12.014 |
| Popis: | A non-catalytic supercritical methanol method is an attractive process to convert various oils/fats efficiently into biodiesel. To evaluate oxidation stability of biodiesel, biodiesel produced by alkali-catalyzed method was exposed to supercritical methanol at several temperatures for 30 min. As a result, it was found that the tocopherol in biodiesel is not stable at a temperature higher than 300 °C. After the supercritical methanol treatment, hydroperoxides were greatly reduced for biodiesel with initially high in peroxide value, while the tocopherol slightly decreased in its content. As a result, the biodiesel prepared by the supercritical methanol method was enhanced for oxidation stability when compared with that prepared by alkali-catalyzed method from waste oil. Therefore, supercritical methanol method is useful especially for oils/fats having higher peroxide values. |
| Databáze: | OpenAIRE |
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