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

Title
Alkaline thermal treatment of seaweed for high-purity hydrogen production with carbon capture and storage potential
Authors
Zhang K.Kim W.-J.Park A.-H.A.
Ewha Authors
김우재
SCOPUS Author ID
김우재scopus
Issue Date
2020
Journal Title
Nature Communications
ISSN
2041-1723JCR Link
Citation
Nature Communications vol. 11, no. 1
Publisher
Nature Research
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
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. © 2020, The Author(s).
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DOI
10.1038/s41467-020-17627-1
Appears in Collections:
엘텍공과대학 > 화학신소재공학전공 > Journal papers
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