Title: Catalytic supercritical water gasification : continuous methanization of Chlorella vulgaris
Authors : Ludwig, Christian
Refardt, Dominik
Vogel, Frédéric
Peng, Gaël
Published in : Industrial & Engineering Chemistry Research
Volume(Issue) : 56
Issue : 21
Pages : 6256
Pages to: 6265
Publisher / Ed. Institution : American Chemical Society
Issue Date: 2017
Language : Englisch / English
Subjects : Microalgae; Methane; Energy; Gasification
Subject (DDC) : 660: Technische Chemie
Abstract: Continuous catalytic supercritical water gasification (CSCWG; 400 °C, 28 MPa) of microalgal biomass (Chlorella vulgaris) was carried out at the microalgae production site of ZHAW in Wädenswil (Switzerland) nonstop over a period of 100 h. Microalgae slurries (3–15 wt %) were successfully gasified to a methane-rich gas for 55 h. The low total organic carbon of the reactor effluent (<400 mg L–1) recorded during that period demonstrated the high catalytic activity of the Ru/C catalyst for converting microalgae to the gaseous products. The addition of a sulfur removal step with a commercial zinc oxide adsorbent was essential for protecting the catalyst against sulfur poisoning. A brine effluent rich in nutrients (N, K, S, P, Na) was withdrawn continuously from a salt separator. In summary, the use of a zinc oxide adsorbent upstream of the catalyst bed, together with a higher ruthenium loading of the catalyst, improved the long-term performance of the CSCWG process significantly.
Departement: Life Sciences und Facility Management
Organisational Unit: Institut für Umwelt und Natürliche Ressourcen (IUNR)
Publication type: Beitrag in wissenschaftlicher Zeitschrift / Article in scientific Journal
DOI : 10.1021/acs.iecr.7b00042
ISSN: 0888-5885
URI: https://digitalcollection.zhaw.ch/handle/11475/1469
Appears in Collections:Publikationen Life Sciences und Facility Management

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