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Vapors with higher molecular weight must go through an additional process to further crack – or separate – the oil into a greater variety of components or fractions as they are called. While diesel is derived from the first stage of the refining process, today’s ultra low sulfur diesel requires an extra step to remove sulfur (this step seems to be an excuse to raise the price). The portion of the vapor with lower molecular weight separates immediately, including kerosene and diesel. The semi-fluids become asphalt and other derivatives while the vapors condense at various levels in the tower depending upon molecular weight. This mixture then proceeds to the atmospheric tower, the heart of the refinery. The oil is then heated by a large furnace until it becomes part semi-fluid and part vapor. This removal is accomplished by adding even more water and then allowing the crude mixture to settle. It is necessary to remove this salt and water. Crude oil typically comes with inorganic salt crystals and water mixed into the oil. The job of the refinery (see figures one (page 17) and two (page 18)) is to clean this mixture and then crack it into various fractions for specific use. Petroleum OilĬrude oil, truly today’s black gold, comes from nature as a dirty blend of hydrocarbons and contaminants of every kind. In this issue, I will briefly explain how petroleum oils are refined, introduce synthetic base oils and explain motor oil’s classification system used to assign quality levels to finished base stocks. #Diesel fuel price vs kerosene free#I am convinced that understanding some basic principles of lubrication can free us from believing everything that we read or hear. ![]() If you read the first two installments of Lube Notes, you have probably come to realize that I am gradually equipping you to evaluate lubricating products including a comparison between synthetic oil vs conventional oil. May be a bit too volatile (and hence not safe!), but may be another alternative.Comparing Synthetic Oil vs Conventional Oil Odorless mineral spirits have the aromatics removed. #Diesel fuel price vs kerosene plus#Regular mineral spirits are mostly C10, with some C9 and C12, plus aromatics (xylene and trimethyl benzene). Gasoline's boiling point is 40-200° C, mineral spirits are 150-215° C, and kero's is 175-275° C. So we might wonder where mineral spirits comes out of the crude tower. I was curious if mineral spirits might be able to be burned in a heater. Stuff coming off the top of the column either ends up being processed for sale, burned for fuel value, or sent to the flare stack. Pentane's high vapor pressure helps winter starting, and it gets put in gasoline in the winter, not sure how they get rid of it in the summer. George, it's mostly methane, ethane, propane, and butane, plus a small amount of other low-molecular weight items. ![]() I found two other links, one of which may answer George's question about what ends up at the top end of a crude tower, at: The link you found and shared is a terrific summary and picture - thanks! Spilled Diesel on a jacket sleeve, once, half a dozen washings, it still stank. I should have remembered that from the Diesl Audis I ran years ago, start better with kero added, in really cold winters, lower fuel mileage. One site gives 135,000 BTU for Kero, 140,000 for #2 feul oil, diesel. What in the world could the stuff that is in the top quartile of the tower produce?Ĭhecked on the above. I have no idea how tall a cracking tower is, but gasoline is probably 1/4 of the way up, volatile but not much energy, diesel 1/2 way up, less volatile, but with more energy, kerosene, farther up, less volatile yet, with even more energy per gallon. Gasoline is even lower in heat value than #2 Diesel. Know, though, that you will lose fuel efficiency by doing so. VW-Audi says to mix up to 30% regular gasoline to the fuel in their diesel engined cars for cold weather operation. Kero has less paraffin than regular diesel, so doesn't gel as quickly, to plug fuel filters on diesel vehicles. Kero, also known as #1 Diesel, actually has higher BTUs than #2 Diesel, or fuel oil, or home heating oil, or Jet Fuel.įormerly sold as "Water White K-1" fuel oil, probably because of the Kerosun heaters everybody bought 20 years ago or more. ![]()
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