Supercritical water gasification of microalga Nannochloropsis over supported Ni and Ru catalysts

Supercritical water gasification (SCWG) of a marine microalga Nannochloropsis was performed in the presence and the absence of supported Ru and Ni catalysts at 385 °C and 26 MPa using a batch reactor. The product gas of the non-catalytic reaction mainly comprised of CO2 while that of catalytic react...

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Bibliographic Details
Main Authors: Wijenayake, A. G. B. S. P., Hassan, M., Komiyama, M.
Format: Conference Proceeding
Language:English
Subjects:
Carbon dioxide
Catalysis
Catalysts
Deactivation
Decomposition reactions
Gasification
Methanation
Reaction time
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Summary:Supercritical water gasification (SCWG) of a marine microalga Nannochloropsis was performed in the presence and the absence of supported Ru and Ni catalysts at 385 °C and 26 MPa using a batch reactor. The product gas of the non-catalytic reaction mainly comprised of CO2 while that of catalytic reaction produced CH4, CO2, H2 and some C2-C4 compounds. The addition of catalysts enhanced the decomposition and conversion (water-gas shift and methanation) reactions, consequently increasing the total gasification efficiency up to 92% for 60 min reaction time. Between the supported Ru and Ni catalysts, Ru resulted in higher gasification efficiency than Ni. Catalyst deactivation during SCWG of Nannochloropsis was also examined.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4968078