Techno-economic evaluation of processes for oxygen and water removal from the CO2 product stream

Zeina Abbas, Toufic Mezher, Mohammad Abu Zahra

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


According to the findings of the first part of this work, the two impurities in the CO2 stream, from post-combustion capture, which require deep removal are oxygen and water, down to 10 and 50 ppmv, respectively. In addition, a review and preliminary evaluation of the possible technologies which can be used for oxygen and water deep removal was conducted, and the results showed that the promising technologies are: catalytic oxidation of hydrogen and refrigeration and condensation, respectively. In this paper, detailed process modeling, design and a techno-economic evaluation are performed on these two technologies. Both selected technologies were designed and proved their potential by achieving the required levels of impurities with a total cost of treating and compressing one ton of CO2 of $13.09 for the coal-fired power plant full purification case and $17.23 for the NGCC full purification process. The cost of CO2 compression without the purification step was found to be approximately $10.12 per ton of CO 2 for the coal-fired case. This means that adding the purification technologies to the coal fired case will increase the cost of CO2 compression by around 29.3%. Assuming a total CO2 capture and compression cost of $73-94 per ton of CO2 shows that the total CO2 purification cost is roughly 3-4% of the overall capture cost.

Original languageBritish English
Pages (from-to)2462-2469
Number of pages8
JournalEnergy Procedia
StatePublished - 2013
Event11th International Conference on Greenhouse Gas Control Technologies, GHGT 2012 - Kyoto, Japan
Duration: 18 Nov 201222 Nov 2012


  • Design
  • Economic evaluation
  • Purification


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