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LNG		
Liquefied natural gas (LNG) is natural gas (predominantly methane, CH4, with some mixture of ethane, C2H6) that has been cooled down to liquid form for ease and safety of non-pressurized storage or transport. It takes up about 1/600th the volume of natural gas in the gaseous state (at standard conditions for temperature and pressure). It is odorless, colorless, non-toxic and non-corrosive. Hazards include flammability after vaporization into a gaseous state, freezing and asphyxia. The liquefaction process involves removal of certain components, such as dust, acid gases, helium, water, and heavy hydrocarbons, which could cause difficulty downstream. The natural gas is then condensed into a liquid at close to atmospheric pressure by cooling it to approximately −162 °C (−260 °F); maximum transport pressure is set at around 25 kPa (4 psi).		
The gas produced from hydrocarbon deposits typically contains a wide range of hydrocarbon products, which usually includes methane (CH4), ethane (C2H6), propane (C3H8) and butane (C4H10). All these products have wide-ranging boiling points and also different heating values allowing different routes to commercialization and also different uses. The "acidic" elements such as hydrogen sulphide (H2S) and carbon dioxide (CO2), together with oil, mud, water, and mercury, are removed from the gas to deliver a clean sweetened stream of gas. Failure to remove such acidic molecules, mercury, and other impurities could result in damage to the equipment. Corrosion of steel pipes and amalgamization of mercury to aluminium within cryogenic heat exchangers could cause expensive damage.		
The gas stream is typically separated into the Liquefied Petroleum fractions (butane and propane), which can be stored in liquid form at relatively low pressure, and the lighter ethane and methane fractions. These lighter fractions of methane and ethane are then liquefied to make up the bulk of LNG that is shipped.		
Natural gas was considered to be economically unimportant wherever gas-producing oil or gas fields were distant from gas pipelines or located in offshore locations where pipelines were not viable. In the past this usually meant that natural gas produced was typically flared, especially since unlike oil no viable method for natural gas storage or transport existed other than pipelines which required the immediate use by end users of the same gas. This meant that natural gas markets were historically entirely local and any production had to be consumed within the local network.		
Developments of production processes, cryogenic storage, and transportation effectively created the tools required to commercialize natural gas into a global market which now competes with other fuels. Furthermore, the development of LNG storage also introduced a reliability in networks which was previously thought impossible. Given that storage of other fuels is relatively easily secured using simple tanks, a supply for several months could be kept in storage. With the advent of large scale cryogenic storage, it was possible to create long term gas storage reserves. These reserves of liquefied gas could be deployed at a moment's notice through regasification processes and today are the main means for networks to handle local peak shaving requirements		
Liquefaction process		
The process begins with the pre-treatment of a feedstock of natural gas entering the system to remove impurities such as H2S, CO2, H2O, mercury and higher-chained hydrocarbons. Feedstock gas then enters the liquefaction unit where it is cooled to between -145 °C and -163 °C Although the type or number of heating cycles and/or refrigerants used may vary based on the technology, the basic process involves circulating the gas through aluminum tube coils and exposure to a compressed refrigerant. As the refrigerant is vaporized, the heat transfer causes the gas in the coils to cool. The LNG is then stored in a specialized double wall insulated tank at atmospheric pressure ready to be transported to its final destination.		
Most domestic LNG is transported by land via truck/trailer designed for cryogenic temperatures. These units consist of an internal steel or aluminum compartment and an external carbon or steel compartment with a vacuum system in between to reduce the amount of heat transfer. Once on site, the LNG must be stored in vacuum insulated or flat bottom storage tanks. When ready for distribution, the LNG enters a regasification facility where it is pumped into a vaporizer and heated back into gaseous form. The gas then enters the pipeline distribution system and is delivered to the end-user.		
Hilli Episeyo		
Hilli Episeyo is not only the second ever Floating LNG platform to enter operation, but also the first of its kind utilising a converted LNG carrier. The Golar LNG’s FLNG concept offers an easy option to monetise small parcels of gas without building mammoth LNG plants.		
Hilli – a 1975 built 125,000 cubic meter LNG carrier, underwent massive transformation at the Keppel yard in Singapore in 2015, at a cost of $1.2 billion. The 294 m long floating plant is moored 14 km off the coast of Kribi in Cameroon. The plant is designed to produce 2.4 MMTPA of LNG, with a storage capacity of 125,000 cubic meter.		
Natural gas is sourced from Perenco’s Sanaga and Ebomé gas fields. In addition to exporting LNG, the plant will also supply 30,000 tons of domestic gas and 5,000 barrels of condensate daily. The plants entire production is already covered under commercial contract with Gazprom Marketing & Trading (GMT) for 8 years.		
With production starting at Hilli Episeyo, approximately 100 new jobs are expected to be created. The first cargo from the plant was dispatched on the 138,000 cubic meter Galicia Spirit in May 2018, making Cameroon the 20th LNG exporting country in the world.		

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