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• W3204390812 abstract "This work evaluated the influence of superheated water steam injection in an autothermal 80 kW th pilot-scale bubbling fluidized bed during biomass direct (air) gasification, focusing on the effect of steam to biomass ratio in the producer gas composition and gasification efficiency parameters. The process was also evaluated in an externally heated 3 kW th bench-scale bubbling fluidized bed and simulated in a thermodynamic equilibrium model. For low-density biomass, the steam injection resulted in a producer gas with higher H 2 concentration and H 2 /CO molar ratio, although with lower energy content, and in a decrease of the process efficiency. Thus, steam injection promoted a trade-off between parameters, that can be associated with a higher occurrence of the water-gas shift reaction. For high-density biomass, along with an increase of H 2 concentration and H 2 /CO molar ratio, steam injection promoted an increase of the producer gas energy content and process efficiency, which can be justified by a higher char accumulation in the reactor bed and consequent higher occurrence of char-steam reforming reactions. Therefore, steam injection shows high potential to improve the producer gas quality from high-density biomass air gasification, however, for low-density biomass, it shows limited potential and should only be used to adjust H 2 /CO molar ratio. • Steam injection was tested to improve producer gas quality from direct (air) biomass gasification. • Steam injection impact was dependent on the biomass and respective reactor bed char inventory. • Under some conditions, steam injection improved producer gas quality and gasification efficiency. • A steam to biomass ratio of 0.5 is recommended for air-steam gasification of high-density biomass. • For low-density biomass, steam addition should only be used to adjust H2/CO molar ratio." @default.
• W3204390812 created "2021-10-11" @default.
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• W3204390812 date "2022-01-01" @default.
• W3204390812 modified "2023-10-17" @default.
• W3204390812 title "Superheated steam injection as primary measure to improve producer gas quality from biomass air gasification in an autothermal pilot-scale gasifier" @default.
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• W3204390812 doi "https://doi.org/10.1016/j.renene.2021.09.083" @default.
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