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

Castello, Daniele; Rolli, Birgit 1; Kruse, Andrea 1; Fiori, Luca
1 Institut für Katalyseforschung und -technologie (IKFT), Karlsruher Institut für Technologie (KIT)


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 reacted alumina surface revealed a good resistance of such material to supercritical conditions, even though some intergranular corrosion was observed. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000077036
Veröffentlicht am 30.11.2017
DOI: 10.3390/en10111734
Zitationen: 33
Web of Science
Zitationen: 30
Zitationen: 32
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Katalyseforschung und -technologie (IKFT)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 11.2017
Sprache Englisch
Identifikator ISSN: 1996-1073
KITopen-ID: 1000077036
HGF-Programm 35.13.02 (POF III, LK 01) Konversion
Erschienen in Energies
Verlag MDPI
Band 10
Heft 11
Seiten Art. Nr.: 1734
Schlagwörter supercritical water gasification; SCWG; reactor; alumina reactor; ceramic reactor; biomass; syngas; bioenergy; reactor material
Nachgewiesen in Dimensions
Web of Science
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