LNG Processing Plant

Overview

PSCM Energy Pte. Ltd. is partnering with one of the leading LNG construction firms on a potential LNG processing plant in Africa. Specifics details are not yet available until agreements are finalized.

What is LNG?

LNG is natural gas (predominantly methane, CH, with some mixture of ethane C 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). 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).

Why LNG?

Natural gas is mainly converted to LNG for transport over the seas where laying pipelines is not feasible technically and economically. LNG achieves a higher reduction in volume than compressed natural gas (CNG) so that the (volumetric) energy density of LNG is 2.4 times greater than that of CNG (at 250 bar) or 60 percent that of diesel fuel. This makes LNG cost efficient in marine transport over long distances. Specially designed cryogenic sea vessels (LNG carriers) or cryogenic road tankers are used for LNG transport. LNG is principally used for transporting natural gas to markets, where it is re-gasified and distributed as pipeline natural gas.

How Does a LNG Plant Work?

A LNG plant processes natural gas into a liquified form to make it easier to transport.

LNG Process Diagram
LNG Process Diagram

Who Needs a LNG Plant?

Locations that have natural gas production much larger than is needed locally can be candidates for LNG plants to enable the surplus natural gas to be exported. Australia, Qatar, Malaysia and Nigeria are currently the largest exporters.

LNG Processing Plant
LNG Processing Plant

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