EUBCE 2024 - Miriam HUBER - Online Tar Prediction in Advanced Steam Gasification: Correlation of PAHS and Product Gas Composition Over a Countercurrent Column

Online Tar Prediction in Advanced Steam Gasification: Correlation of PAHS and Product Gas Composition Over a Countercurrent Column

Short Introductive summary

Product gas from steam gasification of waste material streams is an essential basis for energy carriers, as circular economy approaches are implemented and the existing infrastructure is applicable. The gasification of waste is accompanied by tar, which limit product gas applications as they can condense on downstream equipment. In particular, polycyclic aromatic hydrocarbons (PAHs) cause severe problems, due to their high dew point. Thus, two key issues present themselves: the mitigation of tar formation during the gasification process and the continuous measurement of tar for process monitoring. Both are addressed in advanced dual fluidized steam gasification. A countercurrent column enhances the contact of gas and solid phase to improve gasification reactions and reduce the tar level. The tar level monitoring is performed via hydrocarbon indicator species in the product gas. Established correlations were verified in an experimental series at a 1 MW dual fluidized bed steam gasification plant. To include the tar evolution in the countercurrent column, these correlations have been expanded to include trends for individual tar species and focus on montoring of PAHs.

M. Huber, BEST - Bioenergy and Sustainable Technologies, Graz, AUSTRIA
D. Kadlez, Technische Universität Wien, AUSTRIA
D. Hochstöger, BEST - Bioenergy and Sustainable Technologies, Graz, AUSTRIA
T. Karel, BEST - Bioenergy and Sustainable Technologies, Graz, AUSTRIA
K. Fürsatz, BEST - Bioenergy and Sustainable Technologies, Graz, AUSTRIA
M. Kuba, BEST - Bioenergy and Sustainable Technologies, Graz, AUSTRIA