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Optimized air separation units for oxy-combusion processes.

Number: pap. ID: 242

Author(s) : FU C., GUNDERSEN T.

Summary

Oxy-combustion is a promising technology to enable the capture of CO2 from fossil fuel based power plants. The core idea is to use O2 instead of air for the combustion reaction, so that the flue gas is composed mainly of CO2 and H2O, thus avoiding N2. The CO2 can be captured simply by condensing the H2O. The O2 production process is the most important factor for the power penalty related to CO2 capture in oxy-combustion plants. Current air separation technologies for high volume O2 production are based on cryogenic distillation. There is a large potential for improving this technology from a thermodynamic point of view. This paper presents a detailed exergy analysis of a cryogenic O2 production process. The exergy losses in each sub-unit have been investigated. Based on results from the exergy analysis, ways to improve cryogenic O2 production processes will be proposed.

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Pages: 8 p.

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Details

  • Original title: Optimized air separation units for oxy-combusion processes.
  • Record ID : 30002418
  • Languages: English
  • Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Publication date: 2011/08/21

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