Robust absorption-spectroscopic diagnostics for biomass combustion: measurement methods for gas species, gas temperatures and particle loading

Absorption based spectroscopic methods will be used to develop new, robust, in-situ diagnostics to measure process gas species concentrations (H2O, CO, CO2, C2H2 or HCl), gas temperatures as well as combustor characteristics (residence time). Thereby, the acquisition of previously inaccessible data for model validation and system characterization is facilitated. The development is composed of several hierarchical studies at different burner configurations with increasing burner scale and complexity of the thermo dynamic constraints (one-/two-phase, non-reactive/chem.-reactive), hence providing a consistent reference diagnostic from small scale model burner to industrial scale. In addition to the adaption of absorption spectroscopic methods (development of robust optical setups, broadband spectroscopy), new data analysis methods (tracer based residence time measurements, tomographic reconstruction) are explored and developed.