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Decomposition of benzene using char aerosol particles dispersed in a high-temperature filter

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  • Morgalla, Mario
  • Lin, Leteng
  • Strand, Michael

Abstract

In this study the tar-removal suitability of char particles finely dispersed in a high-temperature filter was investigated. Benzene was selected as the model tar. An aerosol-based method was designed and used to investigate the benzene decomposition behaviour. Two types of char were used: commercially available activated charcoal and pine char prepared in the laboratory. The conversion behaviour of both chars was investigated in the temperature range between 750 and 900 °C using steam as the gasification medium. During the experiments, different benzene concentrations, amounts of deposited char and gas residence times were tested. The results indicate that both activated carbon and pine char reduced the benzene concentration. Activated carbon generally produced higher and more stable benzene conversions compared to the pine char particles. Decreasing the benzene concentration or increasing the gas residence time or char mass improved the benzene conversion. It was concluded that the char gasification rate became slower while benzene was simultaneously converted. The aerosol-based method was also used to investigate benzene decomposition behaviour while continuously supplying fresh char particles together with steam at 1000 °C. In that way, the deactivated and gasified char particles were steadily replaced, preventing the benzene conversion from decreasing over time.

Suggested Citation

  • Morgalla, Mario & Lin, Leteng & Strand, Michael, 2017. "Decomposition of benzene using char aerosol particles dispersed in a high-temperature filter," Energy, Elsevier, vol. 118(C), pages 1345-1352.
  • Handle: RePEc:eee:energy:v:118:y:2017:i:c:p:1345-1352
    DOI: 10.1016/j.energy.2016.11.016
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    References listed on IDEAS

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    1. Henriksen, Ulrik & Ahrenfeldt, Jesper & Jensen, Torben Kvist & Gøbel, Benny & Bentzen, Jens Dall & Hindsgaul, Claus & Sørensen, Lasse Holst, 2006. "The design, construction and operation of a 75kW two-stage gasifier," Energy, Elsevier, vol. 31(10), pages 1542-1553.
    2. Lin, Leteng & Strand, Michael, 2013. "Investigation of the intrinsic CO2 gasification kinetics of biomass char at medium to high temperatures," Applied Energy, Elsevier, vol. 109(C), pages 220-228.
    3. Shen, Yafei, 2015. "Chars as carbonaceous adsorbents/catalysts for tar elimination during biomass pyrolysis or gasification," Renewable and Sustainable Energy Reviews, Elsevier, vol. 43(C), pages 281-295.
    4. Shen, Yafei & Yoshikawa, Kunio, 2013. "Recent progresses in catalytic tar elimination during biomass gasification or pyrolysis—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 21(C), pages 371-392.
    5. Haro, Pedro & Johnsson, Filip & Thunman, Henrik, 2016. "Improved syngas processing for enhanced Bio-SNG production: A techno-economic assessment," Energy, Elsevier, vol. 101(C), pages 380-389.
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    Cited by:

    1. Babler, Matthaus U. & Phounglamcheik, Aekjuthon & Amovic, Marko & Ljunggren, Rolf & Engvall, Klas, 2017. "Modeling and pilot plant runs of slow biomass pyrolysis in a rotary kiln," Applied Energy, Elsevier, vol. 207(C), pages 123-133.
    2. Hervy, Maxime & Weiss-Hortala, Elsa & Pham Minh, Doan & Dib, Hadi & Villot, Audrey & Gérente, Claire & Berhanu, Sarah & Chesnaud, Anthony & Thorel, Alain & Le Coq, Laurence & Nzihou, Ange, 2019. "Reactivity and deactivation mechanisms of pyrolysis chars from bio-waste during catalytic cracking of tar," Applied Energy, Elsevier, vol. 237(C), pages 487-499.

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    Keywords

    Biomass; Char; Tar; Gasification;
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