Gas-fired chemical looping combustion with supercritical CO2 cycle

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dc.contributor.authorKhallaghi, Navid
dc.contributor.authorHanak, Dawid P.
dc.contributor.authorManovic, Vasilije
dc.date.accessioned2019-08-09T14:49:34Z
dc.date.available2019-08-09T14:49:34Z
dc.date.issued2019-05-04
dc.description.abstractOxy-fuel combustion is currently gathering attention as one of the promising options for capturing CO2 efficiently, when applied to power plants, for subsequent carbon sequestration. However, this option requires a large quantity of high-purity oxygen that is usually produced in an energy-intensive air separation unit (ASU). Chemical looping combustion (CLC) is a technology with the potential of reducing the costs and energy penalties associated with current state-of-the-art cryogenic ASUs. In this work, the techno-economic performance of a natural gas-fired oxy-combustion cycle with cryogenic ASU is compared with that based on CLC. Two natural gas-fired cycles are considered: (i) staged oxy-fuel natural gas combined cycle as a reference; and (ii) gas-fired CLC with supercritical CO2 cycle. The process models were developed in Aspen Plus® in order to evaluate the thermodynamic performance of the proposed system and to benchmark it against the reference cycle. The results show that the net efficiency of the proposed cycle, including CO2 compression, is more than 51%, which is comparable to that of a conventional natural gas combined cycle with CO2 capture and 2.7% points higher than that of the reference cycle. Moreover, the economic evaluation indicates that a reduction in levelised cost of electricity from £38.3/MWh to £36.1/MWh can be achieved by replacement of the ASU-based oxy-fuel system with CLC. Hence, gas-fired CLC with a supercritical CO2 cycle has high potential for commercialisation.en_UK
dc.identifier.citationKhallaghi N, Hanak DP, Manovic V. (2019) Gas-fired chemical looping combustion with supercritical CO2 cycle. Applied Energy, Volume 249, September 2019, pp. 237-244en_UK
dc.identifier.issn0306-2619
dc.identifier.urihttps://doi.org/10.1016/j.apenergy.2019.04.096
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/14425
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectCarbon captureen_UK
dc.subjectOxy-fuel turbineen_UK
dc.subjectCryogenic ASUen_UK
dc.subjectChemical looping combustionen_UK
dc.subjectNatural gas combined cycleen_UK
dc.subjectOxygen productionen_UK
dc.titleGas-fired chemical looping combustion with supercritical CO2 cycleen_UK
dc.typeArticleen_UK

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