Natural gas origin, composition, and processing: A review

Natural gas (NG) is a naturally gaseous hydrocarbon mixture.that is formed under the earth's surface. NG is considered to be the cleanest fossil fuel and is a safe source of energy when transported, stored and used. The primary constituent of NG is methane, it may also contain (C-2(+) hydrocarbons, N-2, CO2, He, H2S, and noble gases) according to its origin. Different gas processing technologies can be employed to remove constituents other than methane. Due to importance of NG as a fuel and the increasing global demand of it, this article reviews the fundamentals of NG origin, composition, and processing. (C) 2016 Elsevier B.V. All rights reserved.