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Swatting the diesel bug
| 题名： | Swatting the diesel bug |
| 正文语种： | eng |
| 作者： | Toby Clark |
| 摘要： | Diesel fuel itself is hygroscopic - that is, it attracts water vapour from the air in contact. Most sources agree that biodiesel (found in most DERV) is substantially more hygroscopic (and some processes for making biodiesel result in a higher initial water content). Water vapour also condenses on the walls of cool, mostly empty fuel tanks. Water and diesel fuel are immiscible liquids, so when they are mixed they form an emulsion. This consists of droplets of water suspended in the fuel. The different densities of the liquids mean that eventually the water will separate out into 'free' water, but there are suggestions that the additives in ultra-low sulphur diesel (ULSD) make the water more difficult to remove. These surfactants (and some fuel conditioners) are designed to improve lubricity, but tend to reduce the size of water droplets, making the emulsion more stable. |
| 出版年： | 2022 |
| 期刊名称： | Transport engineer |
| 期： | Dec. |
| 页码： | 22-23 |
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