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
Natural gas in Ukraine price. On 9 January 2014 Naftogaz and Russia's Gazprom signed a supplement to the Russian-Ukrainian gas contract, setting the price of natural gas for Ukraine in the first quarter of 2014 at $268.5 per 1,000 cubic meters. Ukraine remains the main transit route for Russian natural gas sold to Europe, which earns Ukraine about $3 billion a year in transit fees, making it the country’s most lucrative export service. Following Russia's launch of the Nord Stream pipeline, which bypasses Ukraine, gas transit volumes have been steadily decreasing. In 2004 more than 120 bcm of Russian gas was transported through Ukraine;