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Alkaline thermal treatment of seaweed for high-purity hydrogen production with carbon capture and storage potential

Author

Listed:
  • Kang Zhang

    (Columbia University
    State Grid Zhejiang Electric Power Research Institute)

  • Woo-Jae Kim

    (Ewha Womans University)

  • Ah-Hyung Alissa Park

    (Columbia University
    Columbia University)

Abstract

Current thermochemical methods to generate H2 include gasification and steam reforming of coal and natural gas, in which anthropogenic CO2 emission is inevitable. If biomass is used as a source of H2, the process can be considered carbon-neutral. Seaweeds are among the less studied types of biomass with great potential because they do not require freshwater. Unfortunately, reaction pathways to thermochemically convert salty and wet biomass into H2 are limited. In this study, a catalytic alkaline thermal treatment of brown seaweed is investigated to produce high purity H2 with substantially suppressed CO2 formation making the overall biomass conversion not only carbon-neutral but also potentially carbon-negative. High-purity 69.69 mmol-H2/(dry-ash-free)g-brown seaweed is produced with a conversion as high as 71%. The hydroxide is involved in both H2 production and in situ CO2 capture, while the Ni/ZrO2 catalyst enhanced the secondary H2 formation via steam methane reforming and water-gas shift reactions.

Suggested Citation

  • Kang Zhang & Woo-Jae Kim & Ah-Hyung Alissa Park, 2020. "Alkaline thermal treatment of seaweed for high-purity hydrogen production with carbon capture and storage potential," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-17627-1
    DOI: 10.1038/s41467-020-17627-1
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    Cited by:

    1. Kejie Wang & Ge Kong & Guanyu Zhang & Xin Zhang & Lujia Han & Xuesong Zhang, 2022. "Steam Gasification of Torrefied/Carbonized Wheat Straw for H 2 -Enriched Syngas Production and Tar Reduction," IJERPH, MDPI, vol. 19(17), pages 1-15, August.
    2. Jonah M. Williams & A. C. (Thanos) Bourtsalas, 2023. "Assessment of Co-Gasification Methods for Hydrogen Production from Biomass and Plastic Wastes," Energies, MDPI, vol. 16(22), pages 1-18, November.

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