Co-gasification of waste wood with coal: Release of condensable and non-condensable inorganic gas species

This letter deals with the in-situ determination of important inorganic gas phase species in high temperature gasification product gas. The fuels are waste wood and German hard coal which were co-gasified at 1500 °C in lab-scale experiments. The release of the vapour species 34H2S+, 36HCl+, 56KOH+, 58NaCl+, 60COS+, 64SO2+, and 74KCl+ was determined online by a Molecular Beam Mass Spectrometer. The experimentally determined data sets were compared to calculated data sets in order to distinguish the underlying release mechanisms. The release behaviour of the inorganics 34H2S+, 36HCl+, 60COS+, 64SO2+ and 58NaCl+ cannot be attributed to simple mixing and dilution effect only. Further, it is shown that the release of these inorganics is significantly influenced by secondary reactions, e.g. competitive reaction with S and Cl.