Steam reforming of hot gas from gasified wood types and miscanthus biomass

• The reforming of hot gas generated from biomass gasification and high temperature gas filtration was studied in order to reach the goal of the CHRISGAS project: a 60% of synthesis gas (as x(H2)+ x(CO) on a N2 and dry basis) in the exit gas, which can be converted either into H2 or fuels. A Ni-MgAl2O4 commercial-like catalyst was tested downstream the gasification of clean wood made of saw dust, waste wood and miscanthus as herbaceous biomass. The effect of the temperature and contact time on the hydrocarbon conversion as well as the characterization of the used catalysts was studied. Low (<600 °C), medium (750°C–900 °C) and high temperature (900°C–1050 °C) tests were carried out in order to study, respectively, the tar cracking, the lowest operating reformer temperature for clean biomass, the methane conversion achievable as function of the temperature and the catalyst deactivation. The results demonstrate the possibility to produce an enriched syngas by the upgrading of the gasification stream of woody biomass with low sulphur content. However, for miscanthusthe development of catalysts with an enhanced resistance to sulphur poison will be the key point in the process development.

Nyckelord

Reforming downstream gasification; Biomass CFB gasification; Ni catalyst; Synthesis gas from wood and miscanthus; H2S and ash poisoning

Catalysis

Katalys

Chemical process and manufacturing engineering

Kemisk process- och produktionsteknik

Chemical energy engineering

Kemisk energiteknik

Bioenergiteknik/Energi- och Miljöteknik

Bioenergy Technology

Publikations- och innehållstyp

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