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Article . 2024 . Peer-reviewed
License: CC BY
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https://doi.org/10.2139/ssrn.4...
Article . 2023 . Peer-reviewed
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Tar Conversion and Recombination in Steam Gasification of Biogenic Residues: The Influence of a Countercurrent Column in Pilot- and Demonstration-Scale

Authors: Miriam Huber; Florian Benedikt; Thomas Karel; Matthias Binder; Daniel Hochstöger; Anna Egger; Katharina Fürsatz; +1 Authors

Tar Conversion and Recombination in Steam Gasification of Biogenic Residues: The Influence of a Countercurrent Column in Pilot- and Demonstration-Scale

Abstract

First experiments with biogenic residues and a plastic-rich rejects and woody biomass blend were conducted in an advanced 1 MW dual fluidized bed steam gasification demonstration plant at the Syngas Platform Vienna. Wood chips, bark, forest residues, and the plastic-rich rejects and woody biomass blend were tested and the tar composition was analyzed upstream and downstream of the upper gasification reactor, which is designed as a high-temperature column with countercurrent flow of catalytic material. Each feedstock was gasified with olivine as bed material in demonstration scale and is compared to the gasification of softwood pellets with olivine and limestone in pilot scale. A reduction in tar content was observed after countercurrent column for all feedstocks. However, a shift in tar species occurred. While styrene, phenol, and 1H-indene were predominant upstream, naphthalene and polycyclic aromatic hydrocarbons (PAHs) were the prevailing tar species downstream the countercurrent column. Hence, an increase of i.e. anthracene, fluoranthene, and pyrene from the upstream concentration was observed. For pyrene, up to twice the initial concentration was measured. This recombination to PAHs was observed for all feedstocks in demonstration- and pilot-scale. The only exception occurred with limestone as bed material, characterized by a higher catalytic activity in comparison to the typically used olivine. In the perspective of the integrated product gas cleaning, tar with higher temperature of condensation are separated more efficiently in the installed scrubbing unit. Hence, the recombination facilitates an overall decline of tar content after the gas cleaning.

Country
Sweden
Keywords

Bark, Energiteknik, Dual fluidized bed gasification, Polycyclic aromatic hydrocarbons (PAH), Energy Engineering, Bioenergy, Bioenergi, Plastic rejects, Tar mitigation

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
Average
Average
Average
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Energy Research