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Launched in April 2001, Twister Supersonic Gas Conditioning technology was first put into commercial operation over three years ago, dehydrating sour gas with a 12-tube system at the Shell-operated B-11 platform offshore Sarawak. A fuel gas treatment system with 6 tubes is currently being built for the SPDC-operated Afam power plant onshore Nigeria. A FEED contract for using the technology at an offshore condensate stripping plant has been completed for the Nexus Energy Crux field in Australia. During the last two years, the technology has been further proved and extensively tested at the Gasunie Engineering & Technology facility in the Netherlands. The main performance data during this development and test period is presented in this article.
THE SUPERSONIC SEPARATOR
The Twister Supersonic Separator combines adiabatic cooling and cyclonic separation in a single compact device. Adiabatic cooling is achieved in a Laval nozzle—an aerodynamically shaped venturi tube— which achieves an isentropic expansion efficiency of typically 80%.
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