High Pressure Process Technology

PD Dr.-Ing. habil. Andreas Bräuer

The scope of the group


The main scope of the group is the development of special and tailored optical Raman-based (mainly but not solely) diagnostics for advanced process technologies in chemical, biological and medical engineering. Non Raman-based optical measurement techniques are also covered by the laboratory's expertise such as elastic light scattering techniques or absorption and emission techniques.

Often advanced process technologies go along with high pressure, high temperature, short residence times, turbulence, non-stationary operation conditions and limited optical access. Therefore the reliable and optimized operation of advanced processes must not purely rely on theoretical considerations which cannot account for all the above mentioned influences. Consequently the combination of in situ advanced diagnostics with advanced processes is the only possibility to analyze the interconnected intermediate steps which define the functioning chain of the respective processes. Time scales and inhomogeneities are accessible, if measurement techniques with high temporal and spatial resolution are applied. Especially the simultaneous multi-parameter detection allows capturing the mutual interaction of different mechanisms, e.g. flow and mixing on different length scales. The interpretation of the resulting insights permits targeted operation and optimization of the respective process technologies. A focus is on advanced processes taking place at elevated pressures.

The biography of the group

The “High Pressure Process Technology” group has been headed by Andreas Braeuer since January 2006. From January 2006 since March 2007 it was named "Process Diagnostics" group. Due to the orientation of the research group, the "Process Diagnostics" group was renamed as "High Pressure Process Technology" group in 2013.


In April 2007 Andreas Braeuer became board member of the directors of the Erlangen Graduate School in Advanced Optical Technologies (SAOT), which was established at FAU in November 2006 within the German Excellence Initiative. At the same time and in addition to the "Process Diagnostics" group he built up the ARS laboratory as one of SAOT’s research laboratories. Though today the ARS laboratory and the "High Pressure Process Technology" are formally assigned to two different FAU institutions, they are both one and the same group in fact.