|Title:||Catalytic supercritical water gasification : continuous methanization of Chlorella vulgaris|
|Authors :||Ludwig, Christian|
|Published in :||Industrial & Engineering Chemistry Research|
|Publisher / Ed. Institution :||American Chemical Society|
|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 A brine effluent rich in nutrients (N, K, S, P, Na) was withdrawn continuously from a salt separator.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|
|Appears in Collections:||Publikationen Life Sciences und Facility Management|
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