The objective of this work was to investigate the influence of feedstock on the release of trace elements during gasification. Therefore, different types of woody biomass and biomass residues (shells) were thermochemically converted in an atmospheric flow channel reactor furnace at different temperatures (900, 1200, and 1400 °C) under gasification-like conditions. For the determination of the composition of the hot gas, the flow channel reactor was coupled to a molecular beam mass spectrometer. The focus was set on the release of alkali metals (K and Na) and non-metals (S, Cl, and P), which are known for their high volatility and influence on the solid-and gas-phase chemistries, as well as the volatility of the other elements. The main gaseous species were 36 HCl + , 58 NaCl + , 74 KCl + , 64 SO 2 + , 60 COS + , and 63 PO 2 + . After quantification, the data set was correlated with the elemental composition of the biomass and likely release mechanisms are discussed.

This work focused on the release of alkali metals (K and Na) and non-metals (S, Cl, and P) during high-temperature gasification of dried distillers grains with solubles. The release experiments were performed at 600–1400 °C in a flow channel reactor. Hot-gas analysis was performed by a molecular beam mass spectrometer. The underlying release mechanisms are discussed with dependence upon the temperature.

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