Unsaturated gas plants
Published: October 19, 2006, 3:40 pm
Updated: October 19, 2006, 3:40 pm
This article has been reviewed by the following Topic Editor:
Cutler J. Cleveland
Unsaturated (unsat) gas plants recover light hydrocarbons (C3 and C4 olefins) from wet gas streams from the FCC, TCC, and delayed coker overhead accumulators or fractionation receivers. In a typical unsat gas plant, the gases are compressed and treated with amine to remove hydrogen sulfide either before or after they are sent to a fractionating absorber where they are mixed into a concurrent flow of debutanized gasoline. The light fractions are separated by heat in a reboiler, the offgas is sent to a sponge absorber, and the bottoms are sent to a debutanizer. A portion of the debutanized hydrocarbon is recycled, with the balance sent to the splitter for separation. The overhead gases go to a depropanizer for use as alkylation unit feedstock.
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Disclaimer:
This article is taken wholly from, or contains information that was originally published by, the Occupational Safety & Health Administration (OSHA). Topic editors and authors for the Encyclopedia of Earth may have edited its content or added new information. The use of information from the Occupational Safety & Health Administration (OSHA) should not be construed as support for or endorsement by that organization for any new information added by EoE personnel, or for any editing of the original content.
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Citation
OSHA (Content Source);Cutler J. Cleveland (Topic Editor) "Unsaturated gas plants". In: Encyclopedia of Earth. Eds. Cutler J. Cleveland (Washington, D.C.: Environmental Information Coalition, National Council for Science and the Environment). [First published in the Encyclopedia of Earth October 19, 2006; Last revised Date October 19, 2006; Retrieved May 19, 2013 <http://www.eoearth.org/article/Unsaturated_gas_plants>
Unsaturated (unsat) gas plants recover light hydrocarbons (C3 and C4 olefins) from wet gas streams from the FCC, TCC, and delayed coker overhead accumulators or fractionation receivers. In a typical unsat gas plant, the gases are compressed and treated with amine to remove hydrogen sulfide either before or after they are sent to a fractionating absorber where they are mixed into a concurrent flow of debutanized gasoline. The light fractions are separated by heat in a reboiler, the offgas is sent to a sponge absorber, and the bottoms are sent to a debutanizer. A portion of the debutanized hydrocarbon is recycled, with the balance sent to the splitter for separation. The overhead gases go to a depropanizer for use as alkylation unit feedstock.
|
Disclaimer:
This article is taken wholly from, or contains information that was originally published by, the Occupational Safety & Health Administration (OSHA). Topic editors and authors for the Encyclopedia of Earth may have edited its content or added new information. The use of information from the Occupational Safety & Health Administration (OSHA) should not be construed as support for or endorsement by that organization for any new information added by EoE personnel, or for any editing of the original content.
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