Is kerosene lighter than water
|other names||Jet Fuel, Aviation Turbine Fuel, Jet A-1, Light Oil, Middle Distillate, TS-1, Turbine Petroleum|
|Molecular formula||Mixture of substances from C10H22 to C16H34|
|Brief description||colorless, slightly smelling, liquid mixture of substances|
|molar mass||not applicable|
|density||about 0.747-0.84 g / cm3|
|Carbon dioxide emissions from combustion||2760 g / l|
|Energy density (volume related)||9.5 kWh / l = 34.2 MJ / l|
|Energy density (related to mass)||11.9 kWh / kg = 43.1 MJ / kg (Jet-A1)|
|freezing point||−60 ° C to −40 ° C (depending on the variety)|
|Boiling range||about 175-288 ° C|
|Flash point||28 ° C to 38 ° C (depending on the variety)|
|Vapor pressure||about 1 hPa (20 ° C)|
|solubility||well soluble in non-polar solvents, not soluble in polar (water)|
|R and S phrases|| R: 65 |
S: (2) -23-24-62
|Water hazard class||WGK 2 - hazardous to water|
|As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions.|
Kerosene (a light petroleum, Greek Keros: wax) is mainly used as a fuel for the gas turbine engines of jet and turbo-prop aircraft as well as helicopters, but is also a component of diesel fuels. It is also used in liquid grill lighter. It is a narrow fractionation cut from the middle distillate of petroleum refining.
The name kerosene goes back to the doctor and geologist Abraham Gesner (1797–1864), who in 1854 in Nova Scotia (Canada) extracted a flammable liquid from coal. The resulting waxy intermediate product, which played an important role in the process, is the reason why he called the liquid kerosene.
Today's turbine kerosene has nothing to do with historical events. Kerosene is taken from the column bottoms of the middle distillate, which is obtained from petroleum rectification. The narrow fractionation section means that there are few light and less heavy hydrocarbon compounds in the fuel, which is why it does not ignite too early and burns almost residue-free. Most molecules ignite at the same temperature. A boiling analysis provides information about this, which in the case of kerosene shows a long, flat boiling curve in the middle boiling range. This lies between heavy fuel and diesel fuel.
The main difference between kerosene and petroleum is the addition of additives that make it easier to use as aircraft fuel. These include, among others:
- Antistatic agent prevent or reduce the tendency of the fuel to become statically charged during refueling.
- Anti-corrosive agents prevent corrosion in the tanks.
For some years now, additives have also been used to curb the development of black smoke.
Specification and use
The specification AN-F-32, which describes the fuel for the first time in the USA under the name Jet Propellant-1 (JP-1), dates back to 1944. The main disadvantage of the fuel is that it can only be used up to temperatures of −40 ° C. JP-1 has a flash point of 38 ° C, has a boiling range of approx. 180 to 230 ° C and is classified in hazard class A II. The newer name of this type of fuel, which is currently only used in the USA, is JET A.
Today, with the exception of the USA, the specification JET A-1 (former designation JP-1A) with a slightly lower freezing point (−50 ° C) but the same flash point and boiling range as JET A is used almost exclusively as jet fuel for civil aviation. NATO's military aviation (the Bundeswehr as a representative for Germany) uses the same basic fuel under the designation Jet Propellant-8 (JP-8, NATO code F-34), with special additives (additives ), such as antifreeze (Fuel System Icing Inhibitor, FSII), anti-corrosion agents, lubricants, and antistatic agents can be added.
Another variety with a flash point of 28 ° C and a freezing point of −60 ° C is TS-1, which is still used occasionally in Eastern Europe according to the Russian specification GOST 10227-62.
For flights in regions with extremely low temperatures (Alaska, Canada, Siberia) there are still the types JET B for civil and JP-4 with the corresponding additives for military use (Wide Cut Fuels), which are made up of 65% petrol and 35% % Kerosene fractions and also have a freezing point of −60 ° C. However, the engines must be suitable for the use of this fuel. The special grade JP-5 with a particularly high flash point (safety fuel, high flashpoint kerosene) is used on aircraft carriers. Another special type is the hardly flammable JP-7 for aircraft that fly high supersonic speeds and become very hot due to air friction. The only aircraft that used the fuel was the Lockheed SR-71.
For a long time in aviation, kerosene was used exclusively in turbine engines on board jet and turboprop aircraft as well as helicopters, while piston engine-powered aircraft used AvGas (aviation fuel). With the development of special diesel engines suitable for aviation, such as B. the Thielert Centurion 1.7, since the beginning of the 21st century, small aircraft can also be operated with kerosene.
Burning kerosene releases greenhouse gases that increase the greenhouse effect and thus global warming. Air travel accounts for over 2% of the world's CO2Emissions. It is controversial whether CO2-Emissions from aviation outweigh emissions on the ground. The effect of greenhouse gases in high layers of the atmosphere is stronger. Due to the long residence time of CO2 In the atmosphere, however, this is distributed evenly overall, so that the location of the emission is unlikely to have any long-term significance. Since fuel consumption is already a major cost factor in air traffic, the incentives to fly economically are already great. The introduction of a state tax on kerosene in commercial air traffic would further increase fuel costs.
In terms of passenger-kilometers, air traffic is the mode of transport with the highest rate of increase of all modes of transport. Therefore, according to the UN Intergovernmental Panel on Climate Change, the share of air traffic in the greenhouse effect could be up to 15 percent in 2050.
→ Main article: Kerosene tax
Kerosene, like AvGas, is not subject to the (German) mineral oil tax law or the (German) eco tax for commercial aviation companies.
Only in private aviation and for commercial aircraft used in company traffic is each type of aircraft fuel subject to mineral oil tax. Because of the latter point, AOPA Germany is currently examining whether a model lawsuit against the Mineral Oil Tax Act would be worthwhile, B. the company traffic with ships is disadvantaged, which enjoys tax exemption.
- Aviation fuel
- Fuel dumping (discharge of kerosene)
Categories: Harmful Substance | Mixture of substances | mineral oil
- How much do camgirls normally earn every year
- Which operating system do most programmers use
- What is the best goal in life
- What is the rationality of love relationships
- What are the reasons for a drug epidemic
- How do you create a responsive website
- How do I get into missionary work
- Do I legally owe my roommate money?
- Will Canada attack the United States?
- Tobacco is banned in the US
- What is dark matter 13
- Which fruit is good for virus fever?
- Are grapes good for the liver?
- Why do we have to terraform Mars
- What is the Best Cryptocurrency Price Tracker
- Does the climate influence health and life expectancy
- What's the most terrible thing about life
- What's the best rock
- Why is Jet Airways successful
- Why did John Lennon leave the Beatles
- Why is logic important to life
- How are African Americans seen in China
- Is this sentence correct 3
- King Solomon wrote books
- Are 1 3 relatively prime numbers
- What is the cause of internal resistance
- Do you like Fortnite or Minecraft
- How many vegans are there in the US
- Art teachers suppress creativity
- Can we sell cryptocurrencies for real money?
- Which protein powder is good for bodybuilding?
- How is game development as a career