Title: Influence of fuel ash and bed material on the water-gas-shift equilibrium in DFB biomass steam gasification
Authors: Fürsatz, Katharin 
Fuchs, Johannes 
Bartik, Alexander 
Hofbauer, Hermann 
Kuba, M. 
Keywords: steam gasification; bed material; biomass
Issue Date: 2019
Book Title: Proceedings of the ICPS 19 
The bed material chosen for dual fluidized bed steam gasification has an important effect on the performance of gasification. Depending on their characteristics and properties, bed materials can have either a higher or lower catalytic activity, which influences the product gas composition as well as the tar content in the product gas. More catalytically active bed materials, like limestone and olivine, improve the quality of the product gas by e.g. promoting the water-gas-shift reaction and tar reforming reaction. The layers formed on the bed material are another aspect influencing the product gas composition. These layers are formed by the interaction of bed material and fuel ash. The deviation from the water-gas-shift equilibrium was chosen to quantify the effect of several bed materials and ash layers on the catalytic activity. The bed materials tested were K-feldspar, limestone, and activated olivine, while the used fuels were softwood, chicken manure, a bark – chicken manure mixture, and a bark –straw – chicken manure mixture. The performed experiments showed that an increased catalytic activity can be achieved by either using a catalytically active bed materials or ash-rich fuels.
URI: http://hdl.handle.net/20.500.12708/15382
DOI: 10.34726/42
Organisation: E166-03-1 - Forschungsgruppe Zukunftsfähige Energietechnik 
License: Urheberrechtsschutz 1.0
Publication Type: Inproceedings
Appears in Collections:Conference Paper

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