SH Laura Riedel

M.Sc. Sebastian Höhne

  • Postanschrift: Kaiserstr. 12
    Liefer- und Besucheranschrift: Gotthard-Franz-Straße 3
    Geb. 50.31, 4. OG
    D-76131 Karlsruhe

About myself

My interest in food process engineering began during my bachelor's degree in bioengineering at KIT. Accordingly, I did my bachelor's thesis at the Institute of Food Process Engineering. During my subsequent master's internship at Milk & Whey Ingredients by Sachsenmilch, I was able to gain initial experience in the field of spray drying. The subject of drying technology accompanied me the following years as well. For my master’s thesis I studied the heat and mass transfer during freeze-drying of a methylcellulose gel. Since May 2021, I have been working on my doctorate as a research assistant in the field of spray drying of emulsions at the LVT.

Research focus

Spray drying is one of the most important processes for producing powders from liquids. It is a convective drying process in which the liquid is atomized into fine droplets, which are subsequently dried into particles by contact with a hot air stream. The atomization of the liquid leads to an enormous increase in surface area, which allow for extremely short drying times. Due to the short residence time of the dry material, a high product quality can be guaranteed.

An interesting field of application is the spray drying of emulsions. This is a widely used encapsulation technique for the production of a large number of powdered formulations, which is used not only in the food industry but also in the pharmaceutical and chemical industries. The structure of the dried powder is crucial for the processing and quality properties of the powder product. It is therefore of great advantage to know the effect of the material and process parameters on the final powder product during spray drying. The focus of my work is therefore on the investigation of the influence of the drying step on particle morphology, drying kinetics and encapsulation efficiency of the oil droplets during spray drying.


Drying tests can be carried out on a pilot scale at the institute's own pilot plant spray tower with up to 20 kg/h water evaporation and air inlet temperatures of up to 250 °C.  A single droplet test setup is currently being set up at the institute for a model observation of the drying process. For atomization experiments, a spray stand is available which allows online measurement of the spray droplet size distribution by laser diffraction spectroscopy and sampling of the atomized emulsion. Common analytical techniques such as laser diffraction, optical microscopy and rheometry are used to characterize the emulsions and the powder produced.


Influence of Rapeseed Oil on Extruded Plant-Based Meat Analogues: Assessing Mechanical and Rheological Properties
Saavedra Isusi, G. I.; Pietsch, V.; Beutler, P.; Hoehne, S.; Leister, N.
2023. Processes, 11 (7), Art.-Nr.: 1871. doi:10.3390/pr11071871


Einfluss von Prozess- und Formulierungsparametern auf Pulverkenngrößen von sprühgetrockneten, ölhaltigen Pulvern und deren Einfluss auf die Pulverfließfähigkeit
Höhne, S.; Maruna, J.; Gaukel, V.
2024, February. Jahrestreffen der DECHEMA/VDI-Fachgruppe Lebensmittelverfahrenstechnik (2024), Quakenbrück, Germany, February 27–28, 2024
Impact of the drying rate on product properties of spray dried emulsions to enable a targeted product design
Höhne, S.; Gaukel, V.
2023, July. 8th European Drying Conference (EuroDrying 2023), Lodz, Poland, July 4–7, 2023
Influence of Atomization Geometry and Atomization Process Conditions on Oil Droplet Size in the Atomization Step During Spray-Drying of Emulsions
Höhne, S.; Karbstein, H. P.; Gaukel, V.; Taboada, M. L.; Gomez, I. C.
2022. European Conference on Liquid Atomization and Spray Systems (ILASS 2022), Online, September 6–8, 2022


Verkapselung von Öltropfen durch Sprühtrocknung: Einfluss der Trocknungsbedingungen auf die Öltropfengröße und die Verkapselungseffizienz in stärkebasierten Modellsystemen
Höhne, S.; Gaukel, V.
2023, March. Jahrestreffen der DECHEMA/VDI-Fachgruppe Trocknungstechnik (2023), Dresden, Germany, March 6–7, 2023
Einfluss der Düsengeometrie und Prozessführung auf die Öltropfengröße im Zerstäubungsschritt bei der Sprühtrocknung von Emulsionen
Höhne, S.; Taboada, M. L.; Karbstein, H. P.; Gaukel, V.
2022, March 10. Jahrestreffen der ProcessNet-Fachgruppen Lebensmittelverfahrenstechnik und Trocknungstechnik (2022), Frankfurt am Main, Germany, March 10–11, 2022
Encapsulation of oil droplets by Spray-Drying: Opportunities of process intensification for the production of oily powder products
Höhne, S.; Gaukel, V.
2022. 21st IUFoST World Congress of Food Science and Technology (2022), Singapore, Singapore, October 31–November 3, 2022