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Numerical and Experimental Investigation of Equivalence Ratio (ER) and Feedstock Particle Size on Birchwood Gasification

Author

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  • Rukshan Jayathilake

    (Department of Engineering and Sciences, University of Agder, Grimstad 4879, Norway)

  • Souman Rudra

    (Department of Engineering and Sciences, University of Agder, Grimstad 4879, Norway)

Abstract

This paper discusses the characteristics of Birchwood gasification using the simulated results of a Computational Fluid Dynamics (CFD) model. The CFD model is developed and validated with the experimental results obtained with the fixed bed downdraft gasifier available at the University of Agder (UIA), Norway. In this work, several parameters are examined and given importance, such as producer gas yield, syngas composition, lower heating value (LHV), and cold gas efficiency (CGE) of the syngas. The behavior of the parameters mentioned above is examined by varying the biomass particle size. The diameters of the two biomass particles are 11.5 mm and 9.18 mm. All the parameters investigate within the Equivalences Ratio (ER) range from 0.2 to 0.5. In the simulations, a variable air inflow rate is used to achieve different ER values. For the different biomass particle sizes, CO, CO 2 , CH 4 , and H 2 mass fractions of the syngas are analyzed along with syngas yield, LHV, and CGE. At an ER value of 0.35, 9.18 mm diameter particle shows average maximum values of 60% of CGE and 2.79 Nm 3 /h of syngas yield, in turn showing 3.4% and 0.09 Nm 3 /h improvement in the respective parameters over the 11.5 mm diameter biomass particle.

Suggested Citation

  • Rukshan Jayathilake & Souman Rudra, 2017. "Numerical and Experimental Investigation of Equivalence Ratio (ER) and Feedstock Particle Size on Birchwood Gasification," Energies, MDPI, vol. 10(8), pages 1-19, August.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:8:p:1232-:d:108952
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    2. Nguyen, Nhut M. & Alobaid, Falah & Epple, Bernd, 2021. "Chemical looping gasification of torrefied woodchips in a bubbling fluidized bed test rig using iron-based oxygen carriers," Renewable Energy, Elsevier, vol. 172(C), pages 34-45.
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    5. Jānis Krūmiņš & Māris Kļaviņš, 2023. "Integrated Circulating Fluidized Bed Gasification System for Sustainable Municipal Solid Waste Management: Energy Production and Heat Recovery," Energies, MDPI, vol. 16(13), pages 1-23, July.
    6. Se-Won Park & Sang-Yeop Lee & Yean-Ouk Jeong & Gun-Ho Han & Yong-Chil Seo, 2018. "Effects of Oxygen Enrichment in Air Oxidants on Biomass Gasification Efficiency and the Reduction of Tar Emissions," Energies, MDPI, vol. 11(10), pages 1-13, October.
    7. Bjørn H. Hjertager, 2017. "Engineering Fluid Dynamics," Energies, MDPI, vol. 10(10), pages 1-2, September.
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