Natural gas pretreatment prior to liquefaction

Details Natural gas pretreatment prior to liquefaction Natural gas pretreatment prior to liquefaction

1988-06-30

1989-04-18

Warner, Steven E.

Refrigeration

Processes

Circulating external gas

62 20, 62 23, 62 40, F25J 300

Patent

active

048223930

ABSTRACT:
Conventional liquified natural gas (LNG) plants are designed to eliminate moisture and up to 1.0% by volume of carbon dioxide (CO.sub.2) present in gas delivered by pipelines. Pipelines can no longer be expected to supply gas with such a low CO.sub.2 content. The invention pretreates gas with as much as 1.5% to 3.5% by volume of CO.sub.2 so that it becomes acceptable to LNG plants. The pretreatment involves scrubbing natural gas with cold methanol at a temperature below -30.degree. F. and flashing absorbed CO.sub.2 from methanol withdrawn from the scrubber by passing it through a pressure-reducing valve, followed by two successive warming flashings of CO.sub.2. Then, the methanol can be recycled to the scrubber. Required refrigeration is supplied to the methanol entering or leaving the scrubber.

REFERENCES:
patent: 3130026 (1964-04-01), Becker
patent: 3312073 (1967-04-01), Jackson et al.
patent: 3498067 (1970-03-01), Ranke
patent: 4252548 (1981-02-01), Markbreiter et al.

Affiliated with

Also associated with

Rating

Natural gas pretreatment prior to liquefaction does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Natural gas pretreatment prior to liquefaction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Natural gas pretreatment prior to liquefaction will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2395004