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Liquefied Natural Gas (LNG)

Small to medium skid-based LNG plant

The technologies for building micro LNG plants (from five thousand to hundred thousand gallons per day) are now commercially viable and practical and being implemented around the world. This concept allows LNG production facilities to be built at reasonable cost and located at strategic supply routes, city gates and industrial sites. These micro LNG plants are designed and built as modular skids. The plant is made up of several pre-fabricated skids which are built and tested in a shop and then transported and assembled in the field, requiring only some interconnection piping and commissioning at the site.

Micro LNG plants are designed to remove CO2 and H2S during the liquefaction process, making it possible to use stranded gas, low BTU gas or biogas as the feedstock for producing LNG. As a side benefit, many of these facilities may qualify to receive carbon credits by converting the gas that is otherwise vented or flared, into LNG.

IEV can design, build and operate complete micro LNG infrastructure and deliver LNG on a throughput contract basis.

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LNG Infrastructure Development

Feed Gas - Pipeline gas, biogas, flare gas, stranded gas or landfill gas can be used as feed gas for micro LNG plants.

Carbon Dioxide Removal - A contactor column using amine is used to remove carbon dioxide.

Water Removal - Tri ethylene glycol or molecular sieve is used to remove water.

Liquefaction - A conventional Mixed Refrigerant (MR) refrigeration or Turbo Expansion (TXP) process is used to liquefy the gas stream.

LNG Storage - LNG is stored in double walled vacuum jacketed and insulated vessels containing inner aluminum or 9% nickel-steel tank and a carbon steel outer vessel.

Trailer Loading - Normally two 350 GPM capacity pumps are used allowing a LNG trailer to be filled in approximately 45 minutes. A typical load is 10,500 gallons.

End Use of LNG - Vehicular and Marine Transportation
LNG is supplied to the vehicular and marine transportation market via LCNG (LNG -to-CNG) stations. LNG can be dispensed directly into vehicles as a liquid fuel or pressurized by a high pressure pump to near 4000 psig and then vaporized and supplied as CNG using conventional CNG dispensers. The high energy content of LNG makes it an ideal fuel to substitute diesel for long haul transport vehicles and marine vessels.

End Use of LNG - Direct Industrial Users
For large industrial users, LNG can be delivered by road directly to customer sites, stored in large insulated on-site storage tanks, vaporized and supplied as natural gas to power generators, boilers, burners, etc.

End Use of LNG - Industrial, Commercial and Residential Users
LNG can be delivered to a storage site, vaporized and reticulated via a dedicated distribution network. This option is an excellent economical solution to extend the reach of existing gas distribution systems into newly-developed or remote areas while waiting for installation of permanent gas pipelines.