Manuel Haas, M. Sc.

Manuel Haas, M. Sc.

  • Engler-Bunte-Institut, EBI ceb
    Chemische Energieträger – Brennstofftechnologie

    Engler-Bunte-Ring 1
    76131 Karlsruhe

Investigation of Burner-Near Processes in Entrained Flow Gasification

Messung von Tropfengrößen und –geschwindigkeiten im Flugstromvergaser REGA mittels Phasen-Doppler-Anemometrie (PDA)
Particle velocity in the Research Entrained Flow Gasifier REGA is measured by Laser Doppler Anemometry (LDA)
Links: OH*-Chemilumineszenz im Flugstromvergaser, aufgenommen mit einem Bandpassfilter bei λ=310 nm. Die OH-Radikale markieren die Oxidationszone. Rechts: Aufnahme der Flamme im sichtbaren Licht. (Fleck, Hotz) KIT
OH* radicals mark the main reaction zone in the gasifier. The distribution of fuel droplets measured by PDA gives insight into liquid fuel conversion.

The current and future challenges in the world energy system require a CO2-neutral energy supply together with a closure of the anthropogenic carbon cycle by a shift towards a circular economy. 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.

At the entrained flow gasifier in the bioliq-process developed by KIT, the liquid or suspension fuels are fed to the reactor together with the gasification medium (O2, H2O) by an external-mixing twin fluid nozzle. 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.

For an efficient gasification process, complete carbon conversion and a high product yield are required. 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.

These effects are studied at the bench scale Research Entrained Flow Gasifier (REGA) https://www.itc.kit.edu/english/1000.php at the Institute for Technical Chemistry (ITC) https://www.itc.kit.edu/english/57.php. 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.

Main Activities

  • Entrained Flow Gasification (EFG) of liquid and suspension fuels from biogenic and anthropogenic origin (-> Poster)
  • Application of optical and laser-based diagnostics to analyze physical and thermo-chemical processes in the EFG flame zone (-> Poster)
  • Modeling of fuel conversion for liquid and solid phase
  • Investigation of the relationship between fuel conversion and burner concept

Experimental Facilities:
REGA https://www.itc.kit.edu/1000.php

Further information can be found at the website of the Working Group Gasification Technology https://www.itc.kit.edu/english/57.php at Institute of Technical Chemistry (ITC).

Current Bachelor and Master Thesis
Typ Titel Datum

Veröffentlichungen


Entrained Flow Gasification: Impact of Fuel Spray Distribution on Reaction Zone Structure
Haas, M.; Dammann, M.; Fleck, S.; Kolb, T.
2022. SSRN Electronic Journal, 68 S. doi:10.2139/ssrn.4200060
Burner Development for High Pressure Entrained Flow Gasification
Jakobs, T.; Wachter, S.; Haas, M.; Fleck, S.; Kolb, T.
2022. Chemie - Ingenieur - Technik, 94 (9), Article no: 1215. doi:10.1002/cite.202255022
Two-phase free jet model of an atmospheric entrained flow gasifier
Hotz, C.; Haas, M.; Wachter, S.; Fleck, S.; Kolb, T.
2021. Fuel, 304, Art.-Nr.: 121392. doi:10.1016/j.fuel.2021.121392
Insights into the catalytic CO₂ methanation of a boiling water cooled fixed-bed reactor: Simulation-based analysis
Gruber, M.; Wiedmann, D.; Haas, M.; Harth, S.; Loukou, A.; Trimis, D.
2021. The chemical engineering journal, 406, Article no: 126788. doi:10.1016/j.cej.2020.126788
Entrained flow gasification of biogenic fuels – application of characteristic parameters to describe syngas quality and yield
Fleck, S.; Santo, U.; Eberhard, M.; Haas, M.; Kolb, T.
2019. 29. Deutscher Flammentag (2019), Bochum, Germany, September 17–18, 2019
Reaction Zone Characterization in Entrained Flow Gasification Spray Flames
Haas, M.; Fleck, S.; Hotz, C.; Kolb, T.
2019. Jahrestreffen der ProcessNet-Fachgruppe "Hochtemperaturtechnik" (2019), Karlsruhe, Germany, April 2–3, 2019
Polymer crystallinity and crystallization kinetics via benchtop 1 H NMR relaxometry: Revisited method, data analysis, and experiments on common polymers
Räntzsch, V.; Haas, M.; Özen, M. B.; Ratzsch, K.-F.; Riazi, K.; Kauffmann-Weiss, S.; Palacios, J. K.; Müller, A. J.; Vittorias, I.; Gisela Guthausen; Wilhelm, M.
2018. Polymer, 145, 162–173. doi:10.1016/j.polymer.2018.04.066