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- W2887952009 abstract "The use of catalytic bed materials represents a state-of-the-art solution for controlling the concentration of tars in fluidized bed biomass steam gasifiers. Ash-coated olivine is commonly applied as a bed material in gasifiers, owing to its relatively high catalytic activity toward tar species. However, the mechanisms and conversion pathways that are influenced by the ash-coated olivine used as an in-bed catalyst are not fully understood. The present work examines how ash-layered olivine prevents the formation of biomass-derived tar at an early stage of their formation. Tests involving olivine at different stages of activation and at different temperatures were carried out in the Chalmers 2–4-MWth DFB gasifier. A detailed characterization of the tar and light hydrocarbon fractions is presented and discussed in relation to the sources of the aromatic species. It is concluded that the ash-coated olivine prevents the formation of aromatic tar species by promoting steam reforming of early tar precursors. Gas-phase interactions of the early tar precursors and bed material contribute to the observed tar reduction. The results indicate that olivine interferes with the cyclization routes that involve C2H2 and C3 hydrocarbons." @default.
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- W2887952009 date "2018-08-09" @default.
- W2887952009 modified "2023-09-26" @default.
- W2887952009 title "Influence of In-Bed Catalysis by Ash-Coated Olivine on Tar Formation in Steam Gasification of Biomass" @default.
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- W2887952009 doi "https://doi.org/10.1021/acs.energyfuels.8b02153" @default.
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