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Fuel oil - Wikipedia, the free encyclopedia |
 | | Fuel oil is a fraction obtained from petroleum distillation, either as a distillate or a residue. |
 | | Residual fuel oils are sometimes called light when they have been mixed with distillate fuel oil, while distillate fuel oils are called heavy when they have been mixed with residual fuel oil. |
 | | Residual fuel oil is less useful because it is so viscous that it has to be heated, which requires a special heating system, before use and it contains relatively high amounts of pollutants, particularly sulfur, which forms sulfur dioxide upon combustion. |
| en.wikipedia.org /wiki/Residual_fuel (1103 words) |
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