Coal gas is 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...

butane, acetylene, ethylene, hydrogen, carbon monoxide, coal gas (town gas) or natural gas. The light is produced either directly by the flame, generally...

life-cycle greenhouse gas (GHG) emissions from shale gas are similar to those of conventional natural gas, and are much less than those from coal, usually about...

were emitted by burning coal in 2020, which is 40% of total fossil fuel emissions and over 25% of total global greenhouse gas emissions. As part of worldwide...

Coal mining is the process of extracting coal from the ground or from a mine. Coal is valued for its energy content and since the 1880s has been widely...

decomposes organic substances in the coal, driving off water and other volatile and liquid products such as coal gas and coal tar. Coke is the non-volatile residue...

Coal tar is a thick dark liquid which is a by-product of the production of coke and coal gas from coal. It is a type of creosote. It has both medical and...

vapour (H2O)—from coal and water, air and/or oxygen. Historically, coal was gasified to produce coal gas, also known as "town gas". Coal gas is combustible...

fifth of world greenhouse gas emissions, so are the single largest cause of climate change. More than half of all the coal-fired electricity in the world...

as natural gas, fuel oil and coal. The data were obtained by stoichiometric calculations. The total amount of wet flue gas generated by coal combustion...

gases" (also known as "manufactured fuel gas", "manufactured gas" or simply "gas") were made by gasification of combustible materials, usually coal,...

that remove sulfur and oxides from power plant flue gas streams. FGD comprises 24 percent of all coal combustion waste. Residues vary, but the most common...

taken from coal or petroleum. The term was in use by the late 18th century for oil produced as a by-product of the production of coal gas and coal tar. In...

early 1800s, natural gas became known as "natural" to distinguish it from the dominant gas fuel at the time, coal gas. Unlike coal gas, which is manufactured...

Coalbed methane (CBM or coal-bed methane), coalbed gas, or coal seam gas (CSG) is a form of natural gas extracted from coal beds. In recent decades it...

methane gas which on release can generate a spark of static electricity to ignite the gas and start a coal explosion and fire. The same gas static is...

mixture of gases that can cause underground explosions. Extraction of bituminous coal demands the highest safety procedures involving attentive gas monitoring...

A gas holder or gasholder, also known as a gasometer, is a large container in which natural gas or town gas (coal gas or formerly also water gas) is stored...

Coal liquefaction is a process of converting coal into liquid hydrocarbons: liquid fuels and petrochemicals. This process is often known as "Coal to X"...

fuel gases include: Coal gas, obtained from pyrolysis of coal Water gas, largely obsolete, obtained by passing steam over hot coke Producer gas, largely...

pollution, coal burning produces hundreds of millions of tons of solid waste products annually, including fly ash, bottom ash, and flue-gas desulfurization...

transportation usage by oil, natural gas or electricity produced from oil, gas, nuclear power or renewable energy sources. By 2010, coal produced over a fourth of...

breaks up or 'cracks' large molecules. Coke, coal gas, gaseous carbon, coal tar, ammonia liquor, and coal oil are examples of commercial products historically...

formations. Reservoirs of such compound mixtures, such as coal, petroleum and natural gas, can be extracted and burnt as a fuel for human consumption...

magnetohydrodynamics). Phasing out coal-fired power stations and eventually gas-fired power stations, or, if practical, capturing their greenhouse gas emissions, is an...

are black coal, hard coal, stone coal, dark coal, coffee coal, blind coal (in Scotland), Kilkenny coal (in Ireland), crow coal or craw coal, and black...

them faster, to also reduce greenhouse gas emissions by the United States and better limit climate change. Coal has been used to generate electricity in...

A lifting gas or lighter-than-air gas is a gas that has a density lower than normal atmospheric gases and rises above them as a result, making it useful...

balloon is closed to stop the (cold) lifting gas from escaping. Common lifting gases have included hydrogen, coal gas and helium. When heated, air expands. This...

operated on hydrogen gas. Water gas has a lower heat of combustion than coal gas, so the calorific value was often boosted by passing the gas through a heated...