New NGL-recovery process provides viable alternative

Robert R. Huebel Michael G. Malsam Randall Gas Technologies Houston Based on a presentation to the GPA Europe Annual Conference, Prague, Sept. 21-23, 2011. Operational scenarios for two uses of a new refrigeration process for recovering NGLs from natural gas have shown it to enhance operability and reduce capital and operating expenditures when compared with the two more traditional process choices—straight refrigeration and turboexpander. Straight refrigeration units that most often use propane as refrigerant have proven to be economical and reliable. Their operating temperature, however, typically about –35° F., limits NGL extraction. For higher NGL recovery, today’s processor is l...

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