Large amounts of methane (CH4) are often associated with some coal seams. CBM is formed during the process of coalification by transformation of plant material into coal. It is generated by either a microbiological or thermal process as a result of increasing heat at greater depth during coal formation.
Does coal contain methane?
Other, more minor sources of methane from coal mines include surface mines and post-mining activities (coal continues to emit methane as it is stored in piles and transported).
Where is coal bed methane found?
What is coal bed methane and why is it controversial?
The controversy surrounding coal bed methane extraction has to do with the use of water during the process and its impact on global climate change. Coal bed methane exploration involves pumping large volumes of water out of coal seams to reduce the hydrostatic pressure and liberate the gas.
Is coal bed methane renewable energy?
Coalbed methane is considered a non-renewable resource, although the Alberta Research Council, Alberta Geological Survey and others have argued coalbed methane is a renewable resource because the bacterial action that formed the methane is ongoing.
Which gas is found in coal?
Coal gas, gaseous mixture—mainly hydrogen, methane, and carbon monoxide—formed by the destructive distillation (i.e., heating in the absence of air) of bituminous coal and used as a fuel. Sometimes steam is added to react with the hot coke, thus increasing the yield of gas.
How is coal formed?
Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years.
Is methane a liquid or gas?
At room temperature and standard pressure, methane is a colorless, odorless gas. The familiar smell of natural gas as used in homes is achieved by the addition of an odorant, usually blends containing tert-butylthiol, as a safety measure.
Why is methane called sweet gas?
It is called ‘sweet gas’ because it does not contain any hydrogen sulphide. The gas often contains up to a few percent of carbon dioxide. In the past, coalbed methane was often the cause of numerous explosions in underground mines.
What is fire ice?
Fiery Ice. Methane hydrate is often called “fiery ice.” Methane hydrate looks like an ice, and starts burning when an open flame is brought close to it; hence the name. Only water is left after combustion. It is a strange substance.
Why is coal seam gas so controversial?
Coal seam gas (CSG) is a polarising issue in some communities. Proponents argue that CSG is a vital energy resource, necessary for continued gas supply. Opponents claim that CSG could have serious environmental and social impacts.
How do you extract gas from coal?
The process involves pumping oxygen and steam through a small borehole into the coal seam to produce a small and controlled combustion. Unlike coal-bed methane, therefore, the actual coal is converted from a solid state into gas.
Is coal seam gas renewable?
Coal seam gas is a non-renewable energy resource that is a by-product of coal. It is a ‘pure’ and ‘non-toxic’ gas and for this reason has attracted a lot of commercial interest. During the process of coal formation, biogenic and thermogenic methane gas forms.7 мая 2012 г.
What is coal bed methane Upsc?
Coal bed methane (CBM) refers to a reserve of natural gas stored in coal seams. It is an unconventional form of natural gas. … This topic is important for the UPSC Examination for General Studies Paper 3 Environment and Ecology as CBM is also seen as a clean energy source.