Department Gasification Technology

Research group: Gasificiation

Research in the working group Gasification is focused on the basic understanding of the physical and thermo-chemical processes during entrained flow gasification of liquid and suspension fuels under atmospheric conditions. For autothermal gasification processes, the energy and conversion efficiency is coupled directly with the process temperature, and thus with the stoichiometric ratio. As the fuel is fed to the reactor by external mixing two-phase nozzles, the geometry of the burner nozzle has an additional impact on the process efficiency. The high momentum of the gas flow determines the flow field and the local fuel distribution and thus the structure and stability of the reaction zones, and in consequence the quality of the syngas. Experimental investigations are carried out at the atmospheric entrained flow gasifier REGA. The axially movable burner nozzle allows for detailed measurements of local gas phase composition and temperature. Applying laser-optical measuring techniques local distributions of droplet sizes and velocities (PDA) are determined under reacting conditions. Laser induced fluorescence is used to characterize the mixture of the reactants and localize different reaction zones. The measurement data is the basis for development and validation of sub process models and numerical simulation.