Institute for Thermo- and Fluiddynamics
Every one or two years, the European Gas Research Group (GERG) organises a competition to highlight the current work by postgraduate students in the field of renewable or other low carbon gases.
One of the three winners of the 10th GERG Young Researcher's Award is Robin Beckmüller from the Chair of Thermodynamics. He was honored for the progress he made in his doctoral thesis entitled "New Fundamental Equations of State for an Improved Description of Hydrogen-Rich Mixtures with the Reference Model GERG-2008".
Since 1989, the Eickhoff company has donated one prize each to the Faculty of Electrical Engineering and Information Technology and the Faculty of Mechanical Engineering for outstanding scientific achievements in the doctoral process.
This year, Johnny Chhor (left) and Tobias Neumann (right) have been awarded. Tobias Neumann completed his doctocal thesis entitled “Accurate Description of Mixtures with Minor Components Relevant for CSS Including a New Approach for Reactive Mixtures” at the chair of thermodynamics of RUB.
A model was developed to calculate gas solubilities in seawater-like solutions:
The model presented is a combination of a mixture model in the form of the Helmholtz energy and an equation in the terms of the Gibbs energy. The combination allows the quantification of the effect of salt on the solubilities of combustion gases in water. This approach can be used to model the storage of CO2 in saline aquifers, which is captured from combustion gases in the course of CCS (Carbon Capture & Storage). This allows a consistent simulation of the CCS transport and storage processes with Helmholtz equations.
A fundamental equation in the form of the Helmholtz energy for vinyl chloride has been published in the literature for the first time. The article appeared in the International Journal of Thermophysics.
Accurate thermophysical property data are important for the optimal design of production processes. This publication includes an equation of state that can reproduce the underlying experimental data within its measurement uncertainty. This work, combined with other equations from the literature, provides industry with a complete set for modeling the vinyl chloride manufacturing process.
To access the key role of sorption effects in pyrolysis and char conversion of solid biomass fuels in an oxyfuel atmosphere, a pore-structure dependent kinetic (PSK) adsorption model for the prediction of adsorption and diffusion of relevant oxyfuel agents was developed within the project oxyflame. On basis of already derived parameter sets for the adsorption of O2 and CO2, the model is validated with the measured adsorption kinetics of water vapor. The experimental investigations are performed by Dr. Horacio A. Duarte from the Texas A&M University in cooperation with Tim Eisenbach (RUB). Dr. Horacio A. Duarte is spending 5 months as a guest-researcher at the chair.
In cooperation with the Paderborn University and the TU Berlin, density and speed of sound measurements for methyl diethanolamine were conducted in wide temperature and pressure ranges. Based on these data and all other thermodynamic property data available in the literature an equation of state in terms of the Helmholtz energy was developed.
The experimental data and the equation of state are published in the International Journal of Thermophysics and are available open-access thanks to Projekt DEAL: https://doi.org/10.1007/s10765-021-02933-7