Flare Gas Recovery What is Flare Gas ? The flare gas consists of a mixture of various hydrocarbons and is also known as associated petroleum gas. The Gas is flammable in nature and its composition varies from plant to plant and will also vary with time over the operating life of the plant/Oil-well. In Petroleum refineries, Natural gas processing plants and in Oil and gas Production sites, mixture of natural gases is generated from the below sources:   
Extraction of Natural Gas along with oil from oil wells, Gases formed above the liquid level in storage tanks Flashing of high pressure crude to low pressures.
Flares are essential mechanism used as a piece of refineries and petrochemical facilities. They safely burn abundance hydrocarbon gases which can't be recycled or reused. Overabundance hydrocarbon gases are scorched in the flare systems in an ecological-free way, as a differentiating alternative to releasing the vapour straightforwardly into the atmosphere.
Gas flaring is one amongst the most challenging energy and environmental issues facing the world nowadays. Today world is facing global warming as one of its main problems. This drawback can be caused by an increase in greenhouse gas, CH4 and different greenhouse gases (GHG) emissions in the atmosphere. On the opposite hand, the increasing gas is very similar in composition to natural gas and may be a cleaner source of energy than different industrial fossil fuels. Due to the increasing gas costs since 2005 and growing concerns regarding the insufficiency of oil and gas resources the interest in flare gas has increased and the amounts of gas wasted are considered. So, saving energy and reducing emissions are become the worldwide demand for each country. additionally, reducing flaring and increasing the use of fuel gas is a concrete contribution to energy efficiency and temperature change mitigation.
Ejectors in Flare gas Recovery systems : Ejectors perform a central role in Flare Gas Recovery System [subsequently denoted by FGRS] by compressing the low pressure gas mixtures to working pressures. Ejectors utilize the available high pressure gas as energy source to bring about this compression.