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DOI: 10.5445/IR/1000077036

Supercritical Water Gasification of Biomass in a Ceramic Reactor: Long-Time Batch Experiments

Castello, Daniele; Rolli, Birgit; Kruse, Andrea; Fiori, Luca

Abstract:
Supercritical water gasification (SCWG) is an emerging technology for the valorization of (wet) biomass into a valuable fuel gas composed of hydrogen and/or methane. The harsh temperature and pressure conditions involved in SCWG (T > 375 °C, p > 22 MPa) are definitely a challenge for the manufacturing of the reactors. Metal surfaces are indeed subject to corrosion under hydrothermal conditions, and expensive special alloys are needed to overcome such drawbacks. A ceramic reactor could be a potential solution to this issue. Finding a suitable material is, however, complex because the catalytic effect of the material can influence the gas yield and composition. In this work, a research reactor featuring an internal alumina inlay was utilized to conduct long-time (16 h) batch tests with real biomasses and model compounds. The same experiments were also conducted in batch reactors made of stainless steel and Inconel 625. The results show that the three devices have similar performance patterns in terms of gas production, although in the ceramic reactor higher yields of C2+ hydrocarbons were obtained. The SEM observation of the rea ... mehr


Zugehörige Institution(en) am KIT Institut für Katalyseforschung und -Technologie (IKFT)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 1996-1073
URN: urn:nbn:de:swb:90-770362
KITopen ID: 1000077036
HGF-Programm 35.13.02; LK 01
Erschienen in Energies
Band 10
Heft 11
Seiten 1734
Schlagworte supercritical water gasification; SCWG; reactor; alumina reactor; ceramic reactor; biomass; syngas; bioenergy; reactor material
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