Method for liquefying natural gas

Details Method for liquefying natural gas Method for liquefying natural gas

1993-03-08

1994-11-15

Capossela, Ronald C.

Refrigeration

Using electrical or magnetic effect

Thermoelectric; e.g., peltier effect

62 23, 62 39, F25J 100

Patent

active

053636554

ABSTRACT:
Provided is a method for liquefying natural gas which can be readily adapted to LNG plants of all sizes without requiring expensive and special heat exchangers. The liquefaction of feed gas of natural gas and recycle natural gas is carried out with a single-component refrigerant or a mixed refrigerant in a high temperature stage, and with a substantially isentropic expansion in a low temperature stage, and a non-liquefied part of the recycle gas after the expansion step is pressurized with a compressor and recycled along with a recycle stream of non-liquefied par of the feed natural gas, the liquefied part by the refrigerant exchanging heat with the non-liquefied part stream produced from the substantially isentropic expansion, in a plate-fin heat exchanger or the like. The compressor is driven by the power obtained by the substantially isentropic expansion.

REFERENCES:
patent: 4229195 (1980-10-01), Forg
patent: 4256476 (1981-03-01), Van Baush
patent: 4303427 (1981-12-01), Krieger
patent: 4619679 (1986-10-01), DeLong

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