New technology improves nitrogen-removal economics

04/23/2001
A new method of removing nitrogen from natural gas makes production of limited gas accumulations more economical.Developed by Engelhard Corp., the process can reduce nitrogen levels to the 4% typically required by pipelines, while keeping methane at high pressure. It is economical at 2-50 MMscfd flow rates. A demonstration unit began operating in Colorado last year (OGJ, Dec. 11, 2000, p. 64).The Gas Technology Institute estimates that nitrogen contaminates 16% of US natural gas reserves, and its removal substantially raises natural gas processing costs. Nitrogen levels greater than 4% generally must be removed before gas may enter a pipeline system; therefore, costs and operating require...
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