Bernal Institute Research Forum

Date: 5th September 2018 to 5th September 2018
Time: 11:00 to 12:00
Duration: One hour
Location: MSG-025 MSSI Building Extension

Prof. Dr.-Ing. habil. Juergen J. Brandner, Institute of Microstructure Technology (IMT), Karlsruhe Institute of Technology (KIT), Germany.

Process Measurements: Regular Sensors, Micro Sensors, NMR or something else?

Microstructure devices have gained lots of interest in recent decades in many fields of science and technology, reaching from bio-medical applications to thermal and chemical process engineering. Devices with miniaturized internal structures, volumes and functionalities provide drastic improvement in heat and mass transfer as well as in control of processes and process safety. However, aside of many advantages, microstructure devices also show some major disadvantages which makes them difficult to apply or sometimes even prevent application. Especially scaling to achieve higher throughput is still a problem which is not solved yet in many cases, although some examples for industrial applications are present. Another discussable point is measurement and control of miniaturized devices. It is difficult to implement sensors directly into the media flow because the dimensions of conventional sensors will influence the flow distribution, the local temperature and/or reactive behavior and other parameters more. Using semiconductor or glass technologies, microstructure devices with sidewall-implemented sensors can be generated, which measure, unfortunately, only the desired parameters near the wall. For certain measurement techniques like Raman spectroscopy or high speed videography, optical access is needed, which limits then the overpressure resistance and applicability of the device.

An opportunity to avoid all those disadvantages might be the use of magnetic resonance (MR) measurements or magnetic resonance imaging (MRI). By application of strong magnetic fields superposed in different directions, in principle all parameters of a process can be measured. Time and spatial resolution is generally high, which makes NMR / MRI to be a suitable and handy tool for lots of measurement applications. This is especially true since there are benchtop NMR systems available at a reasonable cost, and the miniaturization of these tools continues. This talk will provide a brief overview of current measurement technologies, their major drawbacks, and possibilities to replace them by MR techniques. Moreover, the activities at the Institute of Microstructure Technology in this topic – and some others– will be presented briefly.

Prof. Dr.-Ing. habil. Juergen J. Brandner – studies in Chemistry at University of Heidelberg and Electrical Engineering at Technical University of Karlsruhe. PhD in Mechanical Engineering at the Technical University of Karlsruhe. Habilitation in Micro Process Engineering at Technical University of Dresden. Professor at Technical University of Dresden. Prof. Brandner received the Linde-Award 2009 of Technical University of Dresden (Best Habilitation Thesis) as well as the NEULAND Innovation Award of KIT in 2014, 2015 and 2016. He is working in microstructure devices for approximately 20 years and is currently head of the Microstructures and Process Sensors Group at Institute of Microstructure Technology of Karlsruhe Institute of Technology (KIT). He provides lectures in Micro Process Engineering at Technical University of Dresden, Miniaturized Heat Exchanger Devices at Karlsruhe Institute of Technology and, as a visiting professor, in Micro Process Engineering at the East China University of Science and Technology, Shanghai, as well as at Tsinghua University in Beijing, China. He is author or co-author of about 360 publications in international journals and international conferences as well as contributing to 12 textbooks.

Tea/coffee will be available at 10h45
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