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Experimental and numerical study of oxygen separation and oxy-combustion characteristics inside a button-cell LNO-ITM reactor

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  • Nemitallah, Medhat A.
  • Habib, Mohamed A.
  • Mezghani, K.

Abstract

A combined experimental and numerical study is performed on a button-cell LNO-ITM reactor. A semi-empirical model for oxygen permeation is considered, ABn model, and the values of the empirical constants are calculated based on the fitting of the available experimental data in the literature. A validation study for the present model is performed using the present experimental data. A detailed numerical study is presented on an LNO-ITM button-cell reactor under oxy-fuel combustion conditions. CH4 is used as the working fuel forming a mixture with CO2 at the permeate side inlet. The model results showed reasonable agreements under different operating conditions. The effect of reactivity in the permeate side of the membrane on oxygen permeation flux is considered. It is found that the oxygen permeation flux is increased by about 50% for the case of reacting flow as compared to the case of non-reacting flow. Distinct behavior of oxygen permeation flux values through the present button-cell ITM reactor is encountered while varying the operating conditions as compared to other reactors in the literature. This may be attributed to the complicated design of the flow path close to the membrane surface which maximizes the effects of flow momentum on the oxygen flux.

Suggested Citation

  • Nemitallah, Medhat A. & Habib, Mohamed A. & Mezghani, K., 2015. "Experimental and numerical study of oxygen separation and oxy-combustion characteristics inside a button-cell LNO-ITM reactor," Energy, Elsevier, vol. 84(C), pages 600-611.
    • Handle: RePEc:eee:energy:v:84:y:2015:i:c:p:600-611
    DOI: 10.1016/j.energy.2015.03.022
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    References listed on IDEAS

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    1. Kotowicz, Janusz & Michalski, Sebastian, 2014. "Efficiency analysis of a hard-coal-fired supercritical power plant with a four-end high-temperature membrane for air separation," Energy, Elsevier, vol. 64(C), pages 109-119.
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    4. Ahmed, Pervez & Habib, Mohamed A. & Ben-Mansour, Rached & Kirchen, Patrick & Ghoniem, Ahmed F., 2014. "CFD (computational fluid dynamics) analysis of a novel reactor design using ion transport membranes for oxy-fuel combustion," Energy, Elsevier, vol. 77(C), pages 932-944.
    5. Ben Mansour, R. & Nemitallah, M.A. & Habib, M.A., 2013. "Numerical investigation of oxygen permeation and methane oxy-combustion in a stagnation flow ion transport membrane reactor," Energy, Elsevier, vol. 54(C), pages 322-332.
    6. Habib, Mohamed A. & Nemitallah, Medhat A., 2015. "Design of an ion transport membrane reactor for application in fire tube boilers," Energy, Elsevier, vol. 81(C), pages 787-801.
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    1. Kotowicz, Janusz & Job, Marcin & Brzęczek, Mateusz, 2020. "Thermodynamic analysis and optimization of an oxy-combustion combined cycle power plant based on a membrane reactor equipped with a high-temperature ion transport membrane ITM," Energy, Elsevier, vol. 205(C).
    2. Habib, Mohamed A. & Rashwan, Sherif S. & Nemitallah, Medhat A. & Abdelhafez, Ahmed, 2017. "Stability maps of non-premixed methane flames in different oxidizing environments of a gas turbine model combustor," Applied Energy, Elsevier, vol. 189(C), pages 177-186.
    3. Turi, Davide Maria & Chiesa, Paolo & Macchi, Ennio & Ghoniem, Ahmed F., 2016. "High fidelity model of the oxygen flux across ion transport membrane reactor: Mechanism characterization using experimental data," Energy, Elsevier, vol. 96(C), pages 127-141.

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