Kerosene
A clear liquid with a density between 0.78 and 0.81 grams per cubic centimeter, kerosene flows easily at room temperature. Its molecular structure consists of hydrocarbon chains containing six to twenty carbon atoms, though nine to sixteen carbons dominate the mixture. Branched alkanes and straight-chain alkanes make up most of the volume, while cycloalkanes account for another significant portion. Aromatic hydrocarbons like alkylbenzenes rarely exceed twenty-five percent by volume in standard streams. Olefins appear even less frequently, staying below five percent of the total composition. This specific blend creates a substance that mixes well with other petroleum solvents but refuses to combine with water. The heat released when burning this fuel reaches forty-three point one megajoules per kilogram. Such energy output places it on par with diesel fuel despite its lower viscosity. Safety standards distinguish two primary grades based on sulfur content levels. Grade 1-K contains less than zero point zero four percent sulfur, making it cleaner for indoor use. Grade 2-K allows up to three-tenths of one percent sulfur, which is common for general heating applications.
Persian scholar Rāzi described distillation methods for producing white naphtha in his ninth-century book Kitab al-Asrar. He utilized an alembic apparatus to separate volatile fractions until the final product became clear enough to burn safely. Chinese sources document the extraction of lamp fuel from petroleum as early as fifteen hundred BC during the Ming Dynasty era. Canadian geologist Abraham Gesner claimed to demonstrate liquid kerosene from bituminous coal in Charlottetown, Prince Edward Island, during eighteen hundred and forty-six. Historical records show he patented the process in eighteen fifty-four after securing backing from businessmen who formed the North American Gas Light Company. Scottish chemist James Young developed a commercial oil works at Bathgate in eighteen fifty-one using boghead coal. Young's patents were upheld in lawsuits against other producers, forcing royalties payments for decades. Polish pharmacist Ignacy Łukasiewicz achieved a breakthrough on the night of July thirty-first, eighteen hundred and fifty-three when hospital doctors needed bright light for emergency surgery. His lamps burned so cleanly that officials ordered large supplies immediately. Edwin Drake drilled the first successful petroleum well in western Pennsylvania in eighteen hundred and fifty-nine, triggering massive investment in new wells across Canada and Poland. This surge allowed refiners to bypass coal-based patents entirely by extracting illuminating oil directly from crude petroleum. The industry shifted completely to petroleum sources during the eighteen sixties, causing the trade name Kerosene to lose its proprietary status.
The term kerosene dominates usage in Argentina, Australia, Canada, India, New Zealand, Nigeria, and the United States. Regions including Chile, East Africa, South Africa, Norway, and the United Kingdom prefer the word paraffin or local variants. Parts of Asia and the Southeastern United States commonly use lamp oil as their primary descriptor. Appalachia maintains the historical term coal oil for this substance. Safety regulations often require specific colorings to distinguish kerosene from more volatile fuels like gasoline. Pennsylvania mandates blue coloring for portable containers sold at retail service stations to prevent accidental mixing with red gasoline or yellow diesel. International standards define grades based on flash points and freezing temperatures critical for aviation operations. Grade 1-K burns cleaner with fewer deposits than Grade 2-K, making it preferred for indoor heaters. Premium kerosene typically appears purple when sold in five- or twenty-litre containers from hardware stores. Standard bulk fuel dispensed by tanker trucks remains undyed. The World Health Organization classifies kerosene as a polluting fuel and urges governments to stop promoting household use due to harmful particulate matter in smoke. Regional differences reflect both historical industrial paths and current safety priorities across diverse climates.
Highly refined kerosene known as RP-1 powers many rocket engines alongside liquid oxygen. The Saturn V launch vehicle utilized five F-1 rocket engines generating roughly one point six two times ten to the eleventh watts during liftoff. This massive output equated to two hundred seventeen million horsepower produced by burning dodecane molecules. Modern jet engines rely on grades meeting strict specifications for smoke points and freeze points. Commercial aviation fuel standardized at negative forty degrees Celsius ensures operation in extreme cold conditions. Military forces utilize JP-8, a kerosene-based fuel, to power aircraft and replace diesel in tactical ground vehicles. The United States military uses this fuel for heaters, stoves, tanks, and electrical generators across NATO allies. A pilot project by ETH Zurich demonstrated solar-powered production of kerosene from carbon dioxide and water in July 2022. This synthetic product can blend with fossil-derived versions for existing aviation applications. Ultra-low sulfur kerosene entered service with the New York City Transit Authority in 2004 before widespread adoption of similar standards. These specialized fuels meet rigorous requirements for static electricity control and combustion stability. The reaction between liquid oxygen and RP-1 remains a cornerstone of space exploration history.
Kerosene serves as the main cooking fuel for many poor families in Nigeria where wood-based appliances have been replaced. The Indian government subsidized prices to around fifteen U.S. cents per liter as of February 2007 to discourage forest destruction. Household use carries significant health risks including cancer, respiratory infections, asthma, tuberculosis, cataracts, and adverse pregnancy outcomes. Smoke contains high levels of harmful particulate matter that pollutes indoor air quality. In less-developed countries, portable stoves provide essential energy for cooking and lighting without electricity access. The Amish community relies on kerosene lamps for nighttime illumination while abstaining from modern power grids. Chile and Japan utilize kerosene extensively for home heating through both portable and installed heater systems. Fire risks were historically severe; nearly two out of every five fires in New York City during eighteen eighty resulted from defective lamps. Modern safety measures include additives like RangeKlene to reduce soot production in range cookers used across Europe. Despite these dangers, subsidies keep prices low enough for widespread adoption among vulnerable populations globally.
Aliphatic kerosene functions as a diluent in copper extraction processes using LIX-84 within mixer settlers. Aromatic kerosene grades contain large concentrations of hydrocarbons found in products like Exxon's Solvesso 150. Nuclear reprocessing plants traditionally used aromatic kerosene at UK facilities to reduce radiolysis of TBP compounds. French nuclear industry preferred diluents with minimal aromatic content, often utilizing TPH instead. Recent research by Mark Foreman at Chalmers shows aliphatic kerosene can be replaced with HVO100 biodiesel in solvent extraction. X-ray crystallography laboratories store hydrated crystals in kerosene to prevent slow dehydration that dulls their color. The liquid also prevents air from re-dissolving into boiled liquids or protects alkali metals like potassium and sodium from oxidation. Lithium remains an exception since it floats on the surface due to lower density. Industrial cleaning applications remove chain grease, old lubricants, and stubborn adhesives from glass surfaces. Artists use it to thin oil-based paints though bristles become greasy after cleaning. Water tank mosquito control programs in Australia employ a temporary floating layer to protect defective tanks until repairs occur.
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Common questions
What is the chemical composition of kerosene?
Kerosene consists of hydrocarbon chains containing six to twenty carbon atoms, with nine to sixteen carbons dominating the mixture. Branched alkanes and straight-chain alkanes make up most of the volume while cycloalkanes account for another significant portion.
Who invented kerosene and when was it patented?
Canadian geologist Abraham Gesner demonstrated liquid kerosene from bituminous coal in Charlottetown, Prince Edward Island during 1846. He secured a patent for the process in 1854 after forming the North American Gas Light Company with business backers.
How does kerosene differ between Grade 1-K and Grade 2-K?
Grade 1-K contains less than 0.04 percent sulfur making it cleaner for indoor use. Grade 2-K allows up to 0.3 percent sulfur which is common for general heating applications.
Why do some countries call kerosene paraffin instead?
Regions including Chile, East Africa, South Africa, Norway, and the United Kingdom prefer the word paraffin or local variants. The term kerosene dominates usage in Argentina, Australia, Canada, India, New Zealand, Nigeria, and the United States.
What rocket fuel uses kerosene as its primary component?
Highly refined kerosene known as RP-1 powers many rocket engines alongside liquid oxygen. The Saturn V launch vehicle utilized five F-1 rocket engines generating roughly 1.62 times ten to the eleventh watts during liftoff.