Natural-gas processing at ambient conditions (i.e., pentane and heavier) are called "natural-gas condensate" (sometimes also called "natural gasoline" or simply "condensate"). Natural gas is called "sweet gas" when relatively free of hydrogen sulfide; gas that does contain hydrogen sulfide is called "sour gas". Natural gas, or any other gas mixture, containing significant quantities of hydrogen sulfide, carbon dioxide or similar acidic gases, is called "acid gas." Raw natural gas can also come from methane deposits in the pores of coal seams, and especially in a more concentrated state of adsorption onto the surface of the coal itself. Such gas is referred to
Phoenix Natural Gas Energy Limited (its Republic of Ireland supply business) for £19.1 million. Terra Firma sold Phoenix Natural Gas to Hastings Funds Management (now re-branded Vantage Infrastructure) in 2013 for £700 million. The Utility Regulator in October 2015 set out a proposal to extend the licence area of Phoenix Natural Gas to include 13 new towns at an expected cost of £58 million. Phoenix Natural Gas Phoenix Natural Gas is the largest gas distribution business in Northern Ireland, being the owner and operator of the licence for the distribution network in the Greater Belfast area. The distribution business is responsible for the