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Vliv přídavku oxidu uhličitého ke zplyňovacímu médiu při atmosférickém zplyňování vodní parou ve fluidním loži křemenného písku a vápence
Jeremiáš, Michal ; Pohořelý, Michael ; Vosecký, Martin ; Skoblia, Sergej ; Kameníková, Petra ; Svoboda, Karel ; Punčochář, Miroslav
The aim of this project was to evaluate the effect of addition of CO2 to the gasification agent during allothermal steam fluidized bed gasification of biomass at constant temperature about 800 °C. Moreover, the effect of different fluidized bed materials such as silica sand and limestone together with the effect of temperature on producer gas composition was also examined. Experiments led to conclusions that CO2 added to the gasification agent was converted to CO to only very limited extent while CO2 dilution effect was relatively strong. The CO2 to CO conversion was exhanced by the use of limestone as the bed material. Limestone showed also strong catalytic activity towards reduction in tar content in the producer gas and higher production of H2, CO2 and CO in comparison with silica sand. Optimal temperature for in the bed-use of limestone in the gasification process was proposed to be around 850 °c under the given experimental conditions.

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