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Determining how static fluid pressure affects hydrocarbon generation. Some experiments have demonstrated that static fluid pressure may explain the presence of hydrocarbon concentrations at depths where their composition would not otherwise be expected. Many measurements of hydrocarbon content in sample rocks have been done at atmospheric pressure.
A small fraction of hydrocarbon found on earth, and all currently known hydrocarbon found on other planets and moons, is thought to be abiological. [15] Hydrocarbons such as ethylene, isoprene, and monoterpenes are emitted by living vegetation. [16] Some hydrocarbons also are widespread and abundant in the Solar System.
Natural gas pools interpreted as being mantle-derived are the Shengli Field [55] and Songliao Basin, northeastern China. [56] [57] The Chimaera gas seep, near Çıralı, Antalya (southwest Turkey), has been continuously active for millennia and it is known to be the source of the first Olympic fire in the Hellenistic period.
The proportion of light hydrocarbons in the petroleum mixture varies among oil fields. [59] An oil well produces predominantly crude oil. Because the pressure is lower at the surface than underground, some of the gas will come out of solution and be recovered (or burned) as associated gas or solution gas. A gas well produces predominantly ...
Gas exchange is the physical process by which gases move passively by diffusion across a surface. For example, this surface might be the air/water interface of a water body, the surface of a gas bubble in a liquid, a gas-permeable membrane, or a biological membrane that forms the boundary between an organism and its extracellular environment.
Natural gas burning on a gas stove Burning of natural gas coming out of the ground. Natural gas (also called fossil gas, methane gas, or simply gas) is a naturally occurring mixture of gaseous hydrocarbons consisting primarily of methane (95%) [1] in addition to various smaller amounts of other higher alkanes.
Hydrocarbon economy is a term referencing the global hydrocarbon industry and its relationship to world markets. Energy used mostly comes from three hydrocarbons: petroleum, coal, and natural gas. Hydrocarbon economy is often used when talking about possible alternatives like the hydrogen economy. [1] [2]
Most aliphatic compounds are flammable, allowing the use of hydrocarbons as fuel, such as methane in natural gas for stoves or heating; butane in torches and lighters; various aliphatic (as well as aromatic) hydrocarbons in liquid transportation fuels like petrol/gasoline, diesel, and jet fuel; and other uses such as ethyne (acetylene) in welding.