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Tar reduction in downdraft biomass gasifier using a primary method

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  • Machin, Einara Blanco
  • Pedroso, Daniel Travieso
  • Proenza, Nestor
  • Silveira, José Luz
  • Conti, Leonetto
  • Braga, Lúcia Bollini
  • Machin, Adrian Blanco

Abstract

This work present a novel primary method, for tar reduction in downdraft gasification. The principle of this new technology is to change the fluid dynamic behaviour of the mixture, formed by pyrolysis product and gasification agent in combustion zone; allowing a homogeneous temperature distribution in radial direction in this reaction zone. To achieve the change in the fluid dynamic behaviour of the mixture; the entry of gasification agent to combustion zone is oriented by means of wall nozzles in order to form a swirl flow. This modification in combination with the extension of the reduction zone, will allow, to increases the efficiency of the tar thermal cracking inside the gasifier and the extension of the Boudouard reactions. Consequently, the quantity of tar passing through the combustion zone without cracking and the concentration of tar in the final gas, decrease significantly in relation with the common value obtained for this type of reactor, without affecting significantly the heating value of the producer gas. In this work is presented a new design for 15 kW downdraft gasification reactor, with this technology implemented, the tar content obtained in the experiments never overcome 10mg/Nm3, with a lower heating value of 3.97MJ/Nm3.

Suggested Citation

  • Machin, Einara Blanco & Pedroso, Daniel Travieso & Proenza, Nestor & Silveira, José Luz & Conti, Leonetto & Braga, Lúcia Bollini & Machin, Adrian Blanco, 2015. "Tar reduction in downdraft biomass gasifier using a primary method," Renewable Energy, Elsevier, vol. 78(C), pages 478-483.
    • Handle: RePEc:eee:renene:v:78:y:2015:i:c:p:478-483
    DOI: 10.1016/j.renene.2014.12.069
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    References listed on IDEAS

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    1. Bhattacharya, S.C & Mizanur Rahman Siddique, A.H.Md & Pham, Hoang-Luong, 1999. "A study on wood gasification for low-tar gas production," Energy, Elsevier, vol. 24(4), pages 285-296.
    2. Bui, T. & Loof, R. & Bhattacharya, S.C., 1994. "Multi-stage reactor for thermal gasification of wood," Energy, Elsevier, vol. 19(4), pages 397-404.
    3. Jiu Huang & Klaus Gerhard Schmidt & Zhengfu Bian, 2011. "Removal and Conversion of Tar in Syngas from Woody Biomass Gasification for Power Utilization Using Catalytic Hydrocracking," Energies, MDPI, vol. 4(8), pages 1-15, August.
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    1. Kim, Jong-Woo & Jeong, Yong-Seong & Kim, Joo-Sik, 2022. "Bubbling fluidized bed biomass gasification using a two-stage process at 600 °C: A way to avoid bed agglomeration," Energy, Elsevier, vol. 250(C).
    2. Rahman, Md Mashiur & Aravindakshan, Sreejith & Matin, Md Abdul, 2021. "Design and performance evaluation of an inclined nozzle and combustor of a downdraft moving bed gasifier for tar reduction," Renewable Energy, Elsevier, vol. 172(C), pages 239-250.
    3. Ngamsidhiphongsa, Nathada & Ghoniem, Ahmed F. & Arpornwichanop, Amornchai, 2021. "Detailed kinetic mechanism of devolatilization stage and CFD modeling of downdraft gasifiers using pelletized palm oil empty fruit bunches," Renewable Energy, Elsevier, vol. 179(C), pages 2267-2276.
    4. Pedroso, Daniel Travieso & Machin, Einara Blanco & Proenza Pérez, Nestor & Braga, Lúcia Bollini & Silveira, José Luz, 2017. "Technical assessment of the Biomass Integrated Gasification/Gas Turbine Combined Cycle (BIG/GTCC) incorporation in the sugarcane industry," Renewable Energy, Elsevier, vol. 114(PB), pages 464-479.
    5. Erić, Aleksandar & Cvetinović, Dejan & Milutinović, Nada & Škobalj, Predrag & Bakić, Vukman, 2022. "Combined parametric modelling of biomass devolatilisation process," Renewable Energy, Elsevier, vol. 193(C), pages 13-22.
    6. Bartela, Łukasz & Kotowicz, Janusz & Remiorz, Leszek & Skorek-Osikowska, Anna & Dubiel, Klaudia, 2017. "Assessment of the economic appropriateness of the use of Stirling engine as additional part of a cogeneration system based on biomass gasification," Renewable Energy, Elsevier, vol. 112(C), pages 425-443.
    7. Susastriawan, A.A.P. & Saptoadi, Harwin & Purnomo,, 2017. "Small-scale downdraft gasifiers for biomass gasification: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 76(C), pages 989-1003.
    8. Jeong, Yong-Seong & Choi, Young-Kon & Kim, Joo-Sik, 2019. "Three-stage air gasification of waste polyethylene: In-situ regeneration of active carbon used as a tar removal additive," Energy, Elsevier, vol. 166(C), pages 335-342.
    9. Elsner, Witold & Wysocki, Marian & Niegodajew, Paweł & Borecki, Roman, 2017. "Experimental and economic study of small-scale CHP installation equipped with downdraft gasifier and internal combustion engine," Applied Energy, Elsevier, vol. 202(C), pages 213-227.

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