Research

Multiphase Processes and Reactors

Reactive, multiphase flows in emission control
Heat and mass transfer in multiphase reactors
Droplet and bubble interaction with solid materials
Kinetic measurements and modeling
Chemical energy storage

Education | Degrees

2019

PhD in Chemical Engineering, Karlsruhe Institute of Technology (KIT),

PhD Thesis: Urea-Water Sprays in NOx Emission Control Systems: Interaction with Solid Walls and Deposit Formation

October 2013 – May 2015

M. Sc. Chemical Engineering, TU Dortmund University

October 2009 – July 2013

B. SC. Chemical Engineering, TU Dortmund University

Work History

Since August 2019	Senior Scientist, Head of “Multiphase Processes and Reactors” group Karlsruhe Institute of Technology (KIT) Institute for Chemical Technology and Polymer Chemistry (ITCP)
December 2015 – July 2019	Junior Scientist Karlsruhe Institute of Technology (KIT) Institute for Chemical Technology and Polymer Chemistry (ITCP)
June 2015 – September 2015	Junior Scientist TU Dortmund University Solids Process Engineering

Honors

2020	Dissertation award of the Friedrich and Elisabeth Boysen Foundation
2016	Best Presentation Award, Annual meeting of the ProcessNet subject division “Drying Technology”, Weimar
2015	Award for best graduation of the year, Department of Biochemical and Chemical Engineering, TU Dortmund University

Publications

C. Kuntz, C. Kuhn, H. Weickenmeier, S. Tischer, M. Börnhorst, O. Deutschmann. Kinetic modeling and simulation of high-temperature by-product formation from urea decomposition. Chemical Engineering Science 246 (2021) 116876.
https://doi.org/10.1016/j.ces.2021.116876

C. Ates, M. Börnhorst, R. Koch, M. Eck, O. Deutschmann, H.-J. Bauer. Morphological characterization of urea derived deposits in SCR systems. Chemical Engineering Journal 409 (2021) 128230.

https://doi.org/10.1016/j.cej.2020.128230

U. Budziankou, M. Börnhorst, C. Kuntz, O. Deutschmann, T. Lauer. Deposit Formation from Urea Injection: a Comprehensive Modeling Approach. Emission Control Science and Technology 6 (2020) 211-227.

https://doi.org/10.1007/s40825-020-00159-x

J. Dörnhöfer, M. Börnhorst, C. Ates, N. Samkhaniani, J. Pfeil, M. Wörner, R. Koch, H.-J. Bauer, O. Deutschmann, B. Frohnapfel, T. Koch. A Holistic View on Urea Injection for NOx Emission Control: Impingement, Re-atomization and Deposit Formation. Emission Control Science and Technology 6 (2020) 228-243.

https://doi.org/10.1007/s40825-019-00151-0

M. Börnhorst, C. Kuntz, S. Tischer, O. Deutschmann. Urea derived deposits in diesel exhaust gas after-treatment: Integration of urea decomposition kinetics into a CFD simulation. Chemical Engineering Science 211 (2019) 115319.

https://doi.org/10.1016/j.ces.2019.115319

M. Börnhorst, X. Cai, M. Wörner, O. Deutschmann. Spreading dynamics of urea water solution during

drop impingement. Chemical Engineering & Technology 42 (2019) 2419-2427.

https://doi.org/10.1002/ceat.201800755

S. Tischer, M. Börnhorst, G. Schoch, O. Deutschmann. Thermodynamics and reaction mechanism of urea decomposition. Physical Chemistry Chemical Physics 21 (2019) 16785-16797.

https://doi.org/1039/C9CP01529A

D. Schweigert, H. Lüders, B. Damson, M. Börnhorst, O. Deutschmann. Heat transfer during spray/wall interaction with urea water solution: an experimental parameter study. International Journal of Heat and Fluid Flow 78 (2019) 108432.

https://doi.org/10.1016/j.ijheatfluidflow.2019.108432

M. Börnhorst, S. Langheck, H. Weickenmeier, C. Dem, R. Suntz, O. Deutschmann. Characterization of solid deposits from urea water solution injected into a hot gas test rig. Chemical Engineering Journal 377 (2019) 119855.

https://doi.org/10.1016/j.cej.2018.09.016

M. Börnhorst, O. Deutschmann. Single droplet impingement of urea water solution on a heated substrate. International Journal of Heat and Fluid Flow 69 (2018) 55-61.

https://doi.org/10.1016/j.ijheatfluidflow.2017.10.007

M. Börnhorst, P. Walzel, A. Rahimi, A. Kharaghani, E. Tsotsas, N. Nestle, A. Besser, F. Kleine Jäger, T. Metzger, ”Influence of Pore Structure and Impregnation-drying Conditions on the Solid Distribution in Porous Support Materials”, Drying Technology 34 (2015) 1964-1978.

https://doi.org/10.1080/07373937.2016.1147048