What is NGC?
NGC is natural gas found in coal deposits and consists mainly of hydrocarbon gas primarily methane with minor amounts of carbon dioxide and nitrogen. The primary energy source of natural gas is methane. Natural gas in coal (NGC), (which is also referred to as coal bed methane), will be the term used throughout this document. NGC is gas that is located in coal seams, as opposed to conventional natural gas, which is trapped in rock. NGC is near pipeline quality when produced and, therefore, does not require extensive processing. NGC is created from plant material such as roots and wood that underwent chemical changes when they were deposited in swamps and lakes up to 100 million of years ago. As this material was buried deeper, and compressed under layers of sand and mud over millions of years, it changed to coal. As the coal was formed, the decomposing organic material produced methane gas, nitrogen and carbon dioxide (CO2). The burial process puts pressure on the coal, which keeps much
