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Conceptual design of a 100MWth CLC unit for solid fuel combustion

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  • Abad, Alberto
  • Adánez, Juan
  • Gayán, Pilar
  • de Diego, Luis F.
  • García-Labiano, Francisco
  • Sprachmann, Gerald

Abstract

The conceptual design of a 100MWth unit for coal combustion with CO2 capture by in-situ Gasification Chemical Looping Combustion (iG-CLC) was done. Ilmenite was considered the oxygen carrier and a highly reactive sub-bituminous coal was the fuel. The main components of the iG-CLC unit were a fuel reactor, a carbon stripper and an air reactor. Mass and enthalpy balances were performed to determine the solids circulation flow rate, temperature of the reactors, steam and air requirements, and heat duty of heat exchangers. Fluid dynamics considerations and cyclones sizes were taken into account for the conceptual design and the dimensioning of these devices. In addition, optimized operating conditions obtained with a mathematical model were considered in the design procedure. Then, the performance of the iG-CLC unit was estimated with the model. Some benefits were identified when recirculated CO2 was used to fluidize the carbon stripper and fuel reactor, regarding both fuel reactor performance and energy integration of the iG-CLC system. Thus, a CO2 capture value of 95% with a carbon stripper with 98% efficiency and an oxygen demand in exit gases from the fuel reactor of 7% was predicted with a solids inventory in the fuel reactor of 750kg/MWth. Moreover, the energy penalty related to steam generation was minimized when H2O was replaced by CO2. Results presented in this work can be used to estimate the net efficiency of the plant in future works.

Suggested Citation

  • Abad, Alberto & Adánez, Juan & Gayán, Pilar & de Diego, Luis F. & García-Labiano, Francisco & Sprachmann, Gerald, 2015. "Conceptual design of a 100MWth CLC unit for solid fuel combustion," Applied Energy, Elsevier, vol. 157(C), pages 462-474.
    • Handle: RePEc:eee:appene:v:157:y:2015:i:c:p:462-474
    DOI: 10.1016/j.apenergy.2015.04.043
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    1. Abad, Alberto & Pérez-Vega, Raúl & de Diego, Luis F. & García-Labiano, Francisco & Gayán, Pilar & Adánez, Juan, 2015. "Design and operation of a 50kWth Chemical Looping Combustion (CLC) unit for solid fuels," Applied Energy, Elsevier, vol. 157(C), pages 295-303.
    2. Penthor, Stefan & Zerobin, Florian & Mayer, Karl & Pröll, Tobias & Hofbauer, Hermann, 2015. "Investigation of the performance of a copper based oxygen carrier for chemical looping combustion in a 120kW pilot plant for gaseous fuels," Applied Energy, Elsevier, vol. 145(C), pages 52-59.
    3. Lyngfelt, Anders, 2014. "Chemical-looping combustion of solid fuels – Status of development," Applied Energy, Elsevier, vol. 113(C), pages 1869-1873.
    4. Ströhle, Jochen & Orth, Matthias & Epple, Bernd, 2014. "Design and operation of a 1MWth chemical looping plant," Applied Energy, Elsevier, vol. 113(C), pages 1490-1495.
    5. Thon, Andreas & Kramp, Marvin & Hartge, Ernst-Ulrich & Heinrich, Stefan & Werther, Joachim, 2014. "Operational experience with a system of coupled fluidized beds for chemical looping combustion of solid fuels using ilmenite as oxygen carrier," Applied Energy, Elsevier, vol. 118(C), pages 309-317.
    6. Adánez-Rubio, Iñaki & Abad, Alberto & Gayán, Pilar & García-Labiano, Francisco & de Diego, Luis F. & Adánez, Juan, 2014. "The fate of sulphur in the Cu-based Chemical Looping with Oxygen Uncoupling (CLOU) Process," Applied Energy, Elsevier, vol. 113(C), pages 1855-1862.
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    1. Abad, Alberto & Pérez-Vega, Raúl & de Diego, Luis F. & García-Labiano, Francisco & Gayán, Pilar & Adánez, Juan, 2015. "Design and operation of a 50kWth Chemical Looping Combustion (CLC) unit for solid fuels," Applied Energy, Elsevier, vol. 157(C), pages 295-303.
    2. Cabello, Arturo & Abad, Alberto & Gayán, Pilar & García-Labiano, Francisco & de Diego, Luis F. & Adánez, Juan, 2021. "Increasing energy efficiency in chemical looping combustion of methane by in-situ activation of perovskite-based oxygen carriers," Applied Energy, Elsevier, vol. 287(C).
    3. Nandy, Anirban & Loha, Chanchal & Gu, Sai & Sarkar, Pinaki & Karmakar, Malay K. & Chatterjee, Pradip K., 2016. "Present status and overview of Chemical Looping Combustion technology," Renewable and Sustainable Energy Reviews, Elsevier, vol. 59(C), pages 597-619.
    4. Lu, Chunqiang & Li, Kongzhai & Zhu, Xing & Wei, Yonggang & Li, Lei & Zheng, Min & Fan, Bingbing & He, Fang & Wang, Hua, 2020. "Improved activity of magnetite oxygen carrier for chemical looping steam reforming by ultrasonic treatment," Applied Energy, Elsevier, vol. 261(C).
    5. Mendiara, T. & García-Labiano, F. & Abad, A. & Gayán, P. & de Diego, L.F. & Izquierdo, M.T. & Adánez, J., 2018. "Negative CO2 emissions through the use of biofuels in chemical looping technology: A review," Applied Energy, Elsevier, vol. 232(C), pages 657-684.
    6. Antzaras, Andy N. & Lemonidou, Angeliki A., 2022. "Recent advances on materials and processes for intensified production of blue hydrogen," Renewable and Sustainable Energy Reviews, Elsevier, vol. 155(C).
    7. Paul Dieringer & Falko Marx & Jochen Ströhle & Bernd Epple, 2023. "System Hydrodynamics of a 1 MW th Dual Circulating Fluidized Bed Chemical Looping Gasifier," Energies, MDPI, vol. 16(15), pages 1-46, July.
    8. Adánez-Rubio, Iñaki & Abad, Alberto & Gayán, Pilar & García-Labiano, Francisco & de Diego, Luis F. & Adánez, Juan, 2017. "Coal combustion with a spray granulated Cu-Mn mixed oxide for the Chemical Looping with Oxygen Uncoupling (CLOU) process," Applied Energy, Elsevier, vol. 208(C), pages 561-570.
    9. Zhang, Dongqiang & Duan, Runhao & Li, Hongwei & Yang, Qingchun & Zhou, Huairong, 2020. "Optimal design, thermodynamic, cost and CO2 emission analyses of coal-to-methanol process integrated with chemical looping air separation and hydrogen technology," Energy, Elsevier, vol. 203(C).
    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. Siriwardane, Ranjani & Benincosa, William & Riley, Jarrett & Tian, Hanjing & Richards, George, 2016. "Investigation of reactions in a fluidized bed reactor during chemical looping combustion of coal/steam with copper oxide-iron oxide-alumina oxygen carrier," Applied Energy, Elsevier, vol. 183(C), pages 1550-1564.
    12. García-Labiano, Francisco & de Diego, Luis F. & Cabello, Arturo & Gayán, Pilar & Abad, Alberto & Adánez, Juan & Sprachmann, Gerald, 2016. "Sulphuric acid production via Chemical Looping Combustion of elemental sulphur," Applied Energy, Elsevier, vol. 178(C), pages 736-745.

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