In liquids, the cloud point is the temperature below which a transparent solution undergoes either a liquid-liquid phase separation to form an emulsion or a liquid-solid phase transition to form either a stable sol or a suspension that settles a precipitate.

A device to connect, or disconnect a driving unit to the unit it drives.

New concept of fully-pressurized gas carrier fitted with steel pipes used as pressure vessels. Different from the LNG tanker that maintains LNG in liquefied form at -163°C at near atmospheric pressure...

The cost of liquefaction and associated facilities makes the exploitation of smaller reserves a costly affair.

see Carbon dioxide (CO2) flooding system.

A fully-separated space designed and equipped for the storage of CO2 cylinders. CO2room shall be located aft off the collision bulkhead.

A non-standard term for gas metal arc welding with carbon dioxide shielding gas.

Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams.

Coal analysis techniques are specific analytical methods designed to measure the particular physical and chemical properties of coals.

Coalbed methane extraction is a method for extracting methane from a coal deposit.

Coal bed natural gas is found in underground coal layers.

Coal combustion products (CCPs), also called coal combustion wastes (CCWs) or coal combustion residuals (CCRs) are categorized in four groups, each based on physical and chemical forms derived from coal combustion methods and emission controls.

Coal dust is a fine powdered form of coal, which is created by the crushing, grinding, or pulverizing of coal.

Coal forests were the vast swathes of wetlands that covered much of the Earth's tropical land areas during the late Carboniferous (Pennsylvanian) and Permian times.

A flammable gaseous fuel made from coal and supplied to the user via a piped distribution system. It is produced when coal is heated strongly in the absence of air.

Coal gasification is the process of producing syngas—a mixture consisting primarily of carbon monoxide (CO), hydrogen (H2), carbon dioxide (CO2), natural gas (CH4), and water vapour (H2O)—from coal and water, air and/or oxygen.

Coal liquefaction is a process of converting coal into liquid hydrocarbons: liquid fuels and petrochemicals.

Coal mining is the process of extracting coal from the ground.

Coal phase-out means stopping burning coal for energy, and is part of fossil fuel phase-out.

Coal pollution mitigation, sometimes called clean coal, is a series of systems and technologies that seek to mitigate the health and environmental impact of coal; in particular air pollution from coal-fired power stations, and from coal burnt by heavy industry.