METHOD OF TREATING A HIGH-PRESSURE HYDROCARBON STREAM HAVING A HIGH CARBON DIOXIDE CONTENT TO YIELD A HIGH PURITY HYDROCARBON GAS STREAM AND A SEQUESTRATION READY CARBON DIOXIDE GAS STREAM

摘要

A method of treating a high-pressure hydrocarbon stream, such as natural or synthetic gas, contaminated with a high concentration of carbon dioxide, by contacting the contaminated high-pressure hydrocarbon stream with a chilled aqueous ammonia solution in an absorber at high pressure to produce a treated gas stream having a substantially reduced carbon dioxide content and a carbon dioxide-rich ammonia solution. The carbon dioxide-rich ammonia solution is regenerated by stripping, thus producing a concentrated carbon dioxide stream at high pressure suitable for sequestration or other uses.