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Optimization of a Gas Switching Combustion process through advanced heat management strategies

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  • Cloete, Schalk
  • Zaabout, Abdelghafour
  • Romano, Matteo C.
  • Chiesa, Paolo
  • Lozza, Giovanni
  • Gallucci, Fausto
  • van Sint Annaland, Martin
  • Amini, Shahriar

Abstract

Gas Switching Combustion (GSC) is a promising new process concept for energy efficient power production with integrated CO2 capture. In comparison to conventional Chemical Looping Combustion (CLC) carried out in interconnected fluidized beds, the GSC concept will be substantially easier to design and scale up, especially for pressurized conditions. One potential drawback of the GSC concept is the gradual temperature variation over the transient process cycle, which leads to a drop in electric efficiency of the plant. This article investigates heat management strategies to mitigate this issue both through simulations and experiments. Simulation studies of the GSC concept integrated into an IGCC power plant show that heat management using a nitrogen recycle stream can increase plant efficiency by 3 percentage points to 41.6% while maintaining CO2 capture ratios close to 90%. Reactive multiphase flow simulations of the GSC reactor also showed that heat management can eliminate fuel slip problems. In addition, the GSC concept offers the potential to remove the need for a nitrogen recycle stream by implementing a concentrated air injection that extracts heat while only a small percentage of oxygen reacts. Experiments have shown that, similar to nitrogen recycle, this strategy reduces transient temperature variations across the cycle and therefore merits further investigation.

Suggested Citation

  • Cloete, Schalk & Zaabout, Abdelghafour & Romano, Matteo C. & Chiesa, Paolo & Lozza, Giovanni & Gallucci, Fausto & van Sint Annaland, Martin & Amini, Shahriar, 2017. "Optimization of a Gas Switching Combustion process through advanced heat management strategies," Applied Energy, Elsevier, vol. 185(P2), pages 1459-1470.
    • Handle: RePEc:eee:appene:v:185:y:2017:i:p2:p:1459-1470
    DOI: 10.1016/j.apenergy.2016.04.037
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    Cited by:

    1. Nazir, Shareq Mohd & Cloete, Jan Hendrik & Cloete, Schalk & Amini, Shahriar, 2019. "Gas switching reforming (GSR) for power generation with CO2 capture: Process efficiency improvement studies," Energy, Elsevier, vol. 167(C), pages 757-765.
    2. Carlos Arnaiz del Pozo & Ángel Jiménez Álvaro & Jan Hendrik Cloete & Schalk Cloete & Shahriar Amini, 2020. "Exergy Analysis of Gas Switching Chemical Looping IGCC Plants," Energies, MDPI, vol. 13(3), pages 1-25, January.
    3. Deng, Yuanwang & Liu, Huawei & Zhao, Xiaohuan & E, Jiaqiang & Chen, Jianmei, 2018. "Effects of cold start control strategy on cold start performance of the diesel engine based on a comprehensive preheat diesel engine model," Applied Energy, Elsevier, vol. 210(C), pages 279-287.

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