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Influence of different bed material mixtures on dual fluidized bed steam gasification

Author

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  • Mauerhofer, A.M.
  • Benedikt, F.
  • Schmid, J.C.
  • Fuchs, J.
  • Müller, S.
  • Hofbauer, H.

Abstract

Within this paper, investigations to convert softwood with four different types of bed materials in the 100 kWth dual fluidized bed steam gasification pilot plant at TU Wien are presented and discussed. The results of ten different experiments were compared. Quartz, olivine and feldspar were mixed with limestone in mass ratios of 100/0, 90/10, 50/50 and 0/100. Limestone was used due to its catalytic activity at high temperatures as CaO and thus enhanced tar, char and water conversion of quartz, olivine and feldspar. The admixture of limestone to quartz, olivine and feldspar shifted the product gas compositions towards higher hydrogen and carbon dioxide and lower carbon monoxide contents. By using 100 wt.-% limestone as bed material a hydrogen content of 47.4 vol.-% could be generated. Additionally, the tar concentrations as well as the tar dew points decreased and especially the heavy tar compounds could be reduced. Already small amounts of limestone (<10 wt.-%) to the bed material mixture influenced tar reduction in a positive way. The low abrasion resistance of limestone resulted in increasing dust contents by increasing its amount. However, this could be balanced by the specific design of the separation system of the advanced pilot plant.

Suggested Citation

  • Mauerhofer, A.M. & Benedikt, F. & Schmid, J.C. & Fuchs, J. & Müller, S. & Hofbauer, H., 2018. "Influence of different bed material mixtures on dual fluidized bed steam gasification," Energy, Elsevier, vol. 157(C), pages 957-968.
    • Handle: RePEc:eee:energy:v:157:y:2018:i:c:p:957-968
    DOI: 10.1016/j.energy.2018.05.158
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    Citations

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    Cited by:

    1. Beatrice Vincenti & Francesco Gallucci & Enrico Paris & Monica Carnevale & Adriano Palma & Mariangela Salerno & Carmine Cava & Orlando Palone & Giuliano Agati & Michele Vincenzo Migliarese Caputi & Do, 2023. "Syngas Quality in Fluidized Bed Gasification of Biomass: Comparison between Olivine and K-Feldspar as Bed Materials," Sustainability, MDPI, vol. 15(3), pages 1-12, February.
    2. Mauerhofer, A.M. & Schmid, J.C. & Benedikt, F. & Fuchs, J. & Müller, S. & Hofbauer, H., 2019. "Dual fluidized bed steam gasification: Change of product gas quality along the reactor height," Energy, Elsevier, vol. 173(C), pages 1256-1272.
    3. Fürsatz, K. & Fuchs, J. & Benedikt, F. & Kuba, M. & Hofbauer, H., 2021. "Effect of biomass fuel ash and bed material on the product gas composition in DFB steam gasification," Energy, Elsevier, vol. 219(C).
    4. Li, Dongfang & Qu, Xiaoxiao & Li, Junjie & Hong, Suck Won & Jeon, Chung-hwan, 2022. "Microstructural development of product layer during limestone sulfation and its relationship to agglomeration in large-scale CFB boiler," Energy, Elsevier, vol. 238(PC).
    5. Yang, Shiliang & Wan, Zhanghao & Wang, Shuai & Wang, Hua, 2020. "Computational fluid study of radial and axial segregation characteristics in a dual fluidized bed reactor system," Energy, Elsevier, vol. 209(C).
    6. Ram, Mahendra & Mondal, Monoj Kumar, 2019. "Investigation on fuel gas production from pulp and paper waste water impregnated coconut husk in fluidized bed gasifier via humidified air and CO2 gasification," Energy, Elsevier, vol. 178(C), pages 522-529.
    7. Benedikt, Florian & Kuba, Matthias & Schmid, Johannes Christian & Müller, Stefan & Hofbauer, Hermann, 2019. "Assessment of correlations between tar and product gas composition in dual fluidized bed steam gasification for online tar prediction," Applied Energy, Elsevier, vol. 238(C), pages 1138-1149.
    8. Fuchs, Josef & Schmid, Johannes C. & Müller, Stefan & Hofbauer, Hermann, 2019. "Dual fluidized bed gasification of biomass with selective carbon dioxide removal and limestone as bed material: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 107(C), pages 212-231.
    9. Benedikt, F. & Schmid, J.C. & Fuchs, J. & Mauerhofer, A.M. & Müller, S. & Hofbauer, H., 2018. "Fuel flexible gasification with an advanced 100 kW dual fluidized bed steam gasification pilot plant," Energy, Elsevier, vol. 164(C), pages 329-343.
    10. Wan, Zhanghao & Yang, Shiliang & Wei, Yonggang & Hu, Jianhang & Wang, Hua, 2020. "CFD modeling of the flow dynamics and gasification in the combustor and gasifier of a dual fluidized bed pilot plant," Energy, Elsevier, vol. 198(C).
    11. Zhang, Fengxia & Yang, Shiliang & Yang, Bin & Wang, Hua, 2022. "Mesoscale bubble dynamics in the gasifier of a 1MWth dual fluidized bed gasifier for biomass gasification," Energy, Elsevier, vol. 238(PB).
    12. Stanger, Lukas & Schirrer, Alexander & Benedikt, Florian & Bartik, Alexander & Jankovic, Stefan & Müller, Stefan & Kozek, Martin, 2023. "Dynamic modeling of dual fluidized bed steam gasification for control design," Energy, Elsevier, vol. 265(C).

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