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Characterization of an ilmenite ore for pressurized chemical looping combustion

Author

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  • Ridha, Firas N.
  • Duchesne, Marc A.
  • Lu, Xuao
  • Lu, Dennis Y.
  • Filippou, Dimitrios
  • Hughes, Robin W.

Abstract

This work presents the characterization results of a Canadian ilmenite ore tested in pressurized chemical looping combustion cycles. The ilmenite ore was isothermally cycled in a pressurized thermogravimetric analyzer using carbon monoxide as a reducing fuel and air as an oxidizing gas. All samples were calcined prior to submission to cycles. X-ray diffraction (XRD) comparing raw and calcined ore samples indicate the disappearance of ilmenite crystals and the formation of rutile and ferric pseudobrookite. Cycled ilmenite ore surface morphology was found to be insensitive to the total pressure (up to 51bar) and CO partial pressure (3.2–8.0bar). These findings are in agreement with thermodynamic equilibrium predictions using FactSage. SEM images reveal the development of cracks in the oxidized particles after 4 redox cycles at 950°C and 16bar, which was correlated to the original lamellar structure of the raw ilmenite ore. Increasing the number of redox cycles from 3.5 to 19.5 resulted in large cracks near iron-rich lamellae. Furthermore, the average grain size was smaller after 19.5 cycles. Increasing the reaction temperature from 850°C to 1050°C resulted in similar surface morphologies, but increased grain size. Despite being below melting temperatures, the sample cycled at 1050°C did agglomerate. Local temperature excursions during sample oxidation may have led to melting. This study provides insights into the phase transformations and morphological changes accompanying the use of this type of ilmenite ore in a pressurized chemical looping combustion process, highlighting the need for proper adjustments to the design and operation of the process.

Suggested Citation

  • Ridha, Firas N. & Duchesne, Marc A. & Lu, Xuao & Lu, Dennis Y. & Filippou, Dimitrios & Hughes, Robin W., 2016. "Characterization of an ilmenite ore for pressurized chemical looping combustion," Applied Energy, Elsevier, vol. 163(C), pages 323-333.
    • Handle: RePEc:eee:appene:v:163:y:2016:i:c:p:323-333
    DOI: 10.1016/j.apenergy.2015.10.070
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    4. Fan, Junming & Zhu, Lin & Hong, Hui & Jiang, Qiongqiong & Jin, Hongguang, 2017. "A thermodynamic and environmental performance of in-situ gasification of chemical looping combustion for power generation using ilmenite with different coals and comparison with other coal-driven powe," Energy, Elsevier, vol. 119(C), pages 1171-1180.
    5. Olabi, A.G. & Obaideen, Khaled & Elsaid, Khaled & Wilberforce, Tabbi & Sayed, Enas Taha & Maghrabie, Hussein M. & Abdelkareem, Mohammad Ali, 2022. "Assessment of the pre-combustion carbon capture contribution into sustainable development goals SDGs using novel indicators," Renewable and Sustainable Energy Reviews, Elsevier, vol. 153(C).
    6. Lu, Xuao & Rahman, Ryad A. & Lu, Dennis Y. & Ridha, Firas N. & Duchesne, Marc A. & Tan, Yewen & Hughes, Robin W., 2016. "Pressurized chemical looping combustion with CO: Reduction reactivity and oxygen-transport capacity of ilmenite ore," Applied Energy, Elsevier, vol. 184(C), pages 132-139.
    7. Zhu, Lin & He, Yangdong & Li, Luling & Lv, Liping & He, Jingling, 2018. "Thermodynamic assessment of SNG and power polygeneration with the goal of zero CO2 emission," Energy, Elsevier, vol. 149(C), pages 34-46.
    8. Samuel Bayham & Ronald Breault & Justin Weber, 2017. "Chemical Looping Combustion of Hematite Ore with Methane and Steam in a Fluidized Bed Reactor," Energies, MDPI, vol. 10(8), pages 1-22, August.
    9. Lu, Chunqiang & Li, Kongzhai & Wang, Hua & Zhu, Xing & Wei, Yonggang & Zheng, Min & Zeng, Chunhua, 2018. "Chemical looping reforming of methane using magnetite as oxygen carrier: Structure evolution and reduction kinetics," Applied Energy, Elsevier, vol. 211(C), pages 1-14.
    10. Farajollahi, Hossein & Hossainpour, Siamak, 2023. "Techno-economic assessment of biomass and coal co-fueled chemical looping combustion unit integrated with supercritical CO2 cycle and Organic Rankine cycle," Energy, Elsevier, vol. 274(C).
    11. Rana, Shazadi & Sun, Zhenkun & Mehrani, Poupak & Hughes, Robin & Macchi, Arturo, 2019. "Ilmenite oxidation kinetics for pressurized chemical looping combustion of natural gas," Applied Energy, Elsevier, vol. 238(C), pages 747-759.

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