Advanced theory and simulations, Article no: 2000284. doi:10.1002adts.202000284.

The distribution of fuel droplets measured by PDA gives insight into liquid fuel conversion.

Entrained Flow Gasification (EFG), as an interface technology, is an important building block for future process chains in energy supply system and chemical industry.

The EFG process is characterized by a high fuel flexibility (biogenic and anthropogenic residues, plastic waste, ) paralleled by a high flexibility on the product site due to the large utilization spectrum of syngas (chemicals, fuels, polymers, ).

Syngas, which is a mixture of CO and H2, is produced by a partial oxidation of the educts.

In the reaction chamber, the fuel is then atomized and mixed with the gasification medium.

The fuel reacts with the gasification medium at temperatures above 1200 C, while numerous thermochemical sub-processes occur simultaneously.

Endothermal sub-processes like droplet evaporation, secondary pyrolysis and gasification reactions are enabled by heat release due to exothermal oxidation reactions.

A detailed understanding of these sub-processes and their interactions is key to design and efficient operation of entrained flow reactors.

To enable a direct conversion of the syngas in a catalytic process, the amount of impurities in the syngas needs to be minimized.

The burner nozzle is a main influence on these parameters, since it controls flow field, reactand mixing, fuel spray and structure of the reaction zones, which highly effect fuel conversion and syngas quality.

Conventional invasive analytics (Online IR and FID, thermocouples, particle extraction, ) are complemented with advanced optical diagnostics.

Phase-Doppler-Anemometry (PDA) is used to measure flow field and droplet size distributions inside the reacting system, whereas Laser-Induced-Fluorescence (LIF) of fuel tracers and intermediate species is used to localize reaction zones and to measure fuel conversion.

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Advanced theory and simulations, Article no: 2000284.

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