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Title: Apparatus and process for the refrigeration, liquefaction and separation of gases with varying levels of purity

A process for the separation and liquefaction of component gasses from a pressurized mix gas stream is disclosed. The process involves cooling the pressurized mixed gas stream in a heat exchanger so as to condense one or more of the gas components having the highest condensation point; separating the condensed components from the remaining mixed gas stream in a gas-liquid separator; cooling the separated condensed component stream by passing it through an expander; and passing the cooled component stream back through the heat exchanger such that the cooled component stream functions as the refrigerant for the heat exchanger. The cycle is then repeated for the remaining mixed gas stream so as to draw off the next component gas and further cool the remaining mixed gas stream. The process continues until all of the component gases are separated from the desired gas stream. The final gas stream is then passed through a final heat exchanger and expander. The expander decreases the pressure on the gas stream, thereby cooling the stream and causing a portion of the gas stream to liquify within a tank. The portion of the gas which is not liquefied is passed back through each of the heat exchangesmore » where it functions as a refrigerant.« less
 [1];  [1];  [1]
  1. (Idaho Falls, ID)
Issue Date:
OSTI Identifier:
Bechtel BWXT Idaho, LLC (Idaho Falls, ID) INEEL
Patent Number(s):
US 6105390
Contract Number:
Research Org:
Idaho National Engineering and Environmental Laboratory, Idaho Falls, ID
Country of Publication:
United States
apparatus; process; refrigeration; liquefaction; separation; gases; varying; levels; purity; component; gasses; pressurized; mix; gas; stream; disclosed; involves; cooling; mixed; heat; exchanger; condense; components; condensation; separating; condensed; remaining; gas-liquid; separator; separated; passing; expander; cooled; functions; refrigerant; cycle; repeated; draw; cool; continues; desired; final; passed; decreases; pressure; causing; portion; liquify; tank; liquefied; exchanges; mixed gas; process involves; heat exchange; heat exchanger; gas stream; varying levels; process continues; final heat; gas-liquid separator; gas components; gas component; component gases; component gas; /62/