Locally resolved in-situ measurement of concentrations for isobutane oxidation using laser Raman spectroscopy

  • contact: Dr. Günter Rinke
  • funding: Helmholtz-Energieallianz Energie-effiziente chemische Mehrphasenprozesse
  • Partner:

    Helmholtz-Zentrum Dresden-Rossendorf

  • startdate: 2012
  • enddate: 2015

The oxidation of Isobutane to tert-Butyl-Hydroperoxid was a sub-project of the Helmholtz Research Programs in the field of Efficient Energy Conversion (EEC). HZDR had the focus on the oxidation of isobutane. A long coated capillary and offline analytics (GC) were used and reaction times up to 48 hours investigated.


Additionally, KIT / IMVT applied in-situ laser Raman spectroscopy. A Taylor-flow of isobutane and oxygen at 130 °C and 50 bars was created. To measure the concentrations of educts and products in the liquid phase, a microreactor made of a glass-silicon compound with a meander-shaped microchannel and a Raman system with a pulsed laser were developed which is shown in the following picture. The microreactor with optical access can be used up to 80 bars and 250 °C.

Raman-spektren_isobutanoxidationRaman-Spektren von Isobutan, t-butyl-Hydroperoxid, t-butyl-Alkohol, Aceton, Methanol

Publications / conferences:


[1]   D. Schurr, J. Guhathakurta, S. Simon, G. Rinke, R. Dittmeyer. Characterization of a Raman Spectroscopic and Holographic System for Gas-Liquid Flows in Microchannels, Chemical Engineering & Technology 2017, 40(8), 1400–1407

[2]   G. Rinke, D. Schurr, R. Dittmeyer. Spectroscopic in-situ measuring techniques and
applications in micro process engineering, Colloquium of Optical Spectrometry (COSP) 2017,  Berlin, 27th to 29th November 2017

[3]   G. Rinke, R. Dittmeyer. In-situ measurement of concentrations for two-phase reactions using laser Raman spectroscopy, 2nd International Symposium on Multiscale Multiphase Process Engineering (MMPE), 24. - 27. 9. 2014, Hamburg

[4]   C. Fräulin, G. Rinke, R. Dittmeyer. Characterization of a new system for space-resolved simultaneous in situ measurements of hydrocarbons and dissolved oxygen in microchannels, Microfluidics and Nanofluidics 16(1-2), 149-157 (2014)

[5]   C. Fräulin, G. Rinke, R. Dittmeyer. In-situ Laser Raman Spectroscopy Adapted to Process Conditions for Studying Cyclohexane Oxidation, Journal of Flow Chemistry 3(3), 87-91 (2013)