Flexible microfluidic platform for thermophysical property data of electrolytes


Weißenberg, Felix © Copyright: Lehrstuhl fuer Technische Thermodynamik der RWTH Aachen


Felix Weißenberg

Measurement Systems Engineering


+49 241 80-95395



The Cluster of Excellence – “The Fuel Science Center”

The aim of the Cluster of Excellence “The Fuel Science Center” (FSC) is to integrate renewable electricity with the shared use of bio-based carbon raw materials and CO2 to provide high-density liquid fuels (“bio-hybrid fuels”) that enable innovative engine concepts for highly efficient and clean combustion.

Further information about the work and organization of the FSC can be found on the website.



Thermophysical property data like diffusion coefficients and liquid-liquid equilibria are essential for the design of new chemical products and processes. Especially in separation processes, diffusion often limits the mass transfer and thus determine equipment size and the resulting capital cost. Still, prediction of diffusion coefficients and liquid-liquid equilibria is difficult, in particular, for new chemicals such as the fuel candidates developed in the Fuel Science Center.

Here, numerous potential new fuel candidates are explored during a screening phase. However, thermophysical property data is often missing and therefore needs to be measured. A new measurement technique is necessary, as the new fuel candidates are only available in small amounts and conventional techniques for the determination of thermophysical properties require either substantial time or material, or both.



In this project, we develop a flexible microfluidic platform in combination with Raman spectroscopy. Thus, the advantages of microfluidics (fast measurements, small sample volume, low costs) are coming together with the advantages of Raman spectroscopy (determination of multicomponent mixtures in a single experiment) to gain a suitable measurement method for the new fuel candidates.