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Simulation of the Fast Pyrolysis of Coffee Ground in a Tilted-Slide Reactor

Author

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  • Sang Kyu Choi

    (Department of Clean Fuel & Power Generation, Korea Institute of Machinery & Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, Korea
    Environment & Energy Mechanical Engineering, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea)

  • Yeon Seok Choi

    (Department of Clean Fuel & Power Generation, Korea Institute of Machinery & Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, Korea
    Environment & Energy Mechanical Engineering, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea)

  • Yeon Woo Jeong

    (Department of Clean Fuel & Power Generation, Korea Institute of Machinery & Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, Korea)

  • So Young Han

    (Department of Clean Fuel & Power Generation, Korea Institute of Machinery & Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, Korea)

  • Quynh Van Nguyen

    (Environment & Energy Mechanical Engineering, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea)

Abstract

The fast pyrolysis of coffee ground for bio-crude oil production was simulated in a tilted-slide reactor. The biochemical composition was derived by an extended biomass characterization method based on the elemental analysis. The simulation was performed in a steady-state and a Lagrangian multiphase model was adopted to describe the transport of sand and biomass particles together with a multistep kinetic mechanism for fast pyrolysis. When the secondary tar cracking reactions were not considered the volatile yield increased monotonically with temperature. The inclusion of secondary reactions could improve the prediction of volatile yield which turn to decrease at higher temperature. It was found that not only the maximum volatile yield but also the corresponding reactor temperature agreed well with the experimental results. At the temperature higher than 550 °C the trend of volatile yield is similar to that of experiment while it is larger at lower reactor temperature. The individual species yields were compared at various reactor temperatures and the pyrolysis processes were analyzed by tracking the reference components when they were decomposed along the distance. It was found that the reactor temperature should be above 500 °C for effective pyrolysis of all reference components of coffee ground.

Suggested Citation

  • Sang Kyu Choi & Yeon Seok Choi & Yeon Woo Jeong & So Young Han & Quynh Van Nguyen, 2020. "Simulation of the Fast Pyrolysis of Coffee Ground in a Tilted-Slide Reactor," Energies, MDPI, vol. 13(24), pages 1-19, December.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:24:p:6605-:d:462033
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    References listed on IDEAS

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    1. Bok, Jin Pil & Choi, Yeon Seok & Choi, Sang Kyu & Jeong, Yeon Woo, 2014. "Fast pyrolysis of Douglas fir by using tilted-slide reactor and characteristics of biocrude-oil fractions," Renewable Energy, Elsevier, vol. 65(C), pages 7-13.
    2. Sia, Sheng Qiang & Wang, Wei-Cheng, 2020. "Numerical simulations of fluidized bed fast pyrolysis of biomass through computational fluid dynamics," Renewable Energy, Elsevier, vol. 155(C), pages 248-256.
    3. Bok, Jin Pil & Choi, Hang Seok & Choi, Joon Weon & Choi, Yeon Seok, 2013. "Fast pyrolysis of Miscanthus sinensis in fluidized bed reactors: Characteristics of product yields and biocrude oil quality," Energy, Elsevier, vol. 60(C), pages 44-52.
    4. Park, Hoon Chae & Choi, Hang Seok, 2019. "Fast pyrolysis of biomass in a spouted bed reactor: Hydrodynamics, heat transfer and chemical reaction," Renewable Energy, Elsevier, vol. 143(C), pages 1268-1284.
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    Cited by:

    1. Enas Taha Sayed & Abdul Ghani Olabi & Abdul Hai Alami & Ali Radwan & Ayman Mdallal & Ahmed Rezk & Mohammad Ali Abdelkareem, 2023. "Renewable Energy and Energy Storage Systems," Energies, MDPI, vol. 16(3), pages 1-26, February.
    2. Tomasz P. Olejnik & Tymoteusz Mysakowski & Paweł Tomtas & Radosław Mostowski, 2021. "Optimization of the Beef Drying Process in a Heat Pump Chamber Dryer," Energies, MDPI, vol. 14(16), pages 1-21, August.

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