2021
DOI: 10.3390/mi12020116
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In-Line Analysis of Diffusion Processes in Micro Channels by Long Distance Raman Photometric Measurement Technology—A Proof of Concept Study

Abstract: This work presents a novel method for the non-invasive, in-line monitoring of mixing processes in microchannels using the Raman photometric technique. The measuring set-up distinguishes itself from other works in this field by utilizing recent state-of-the-art customized photon multiplier (CPM) detectors, bypassing the use of a spectrometer. This addresses the limiting factor of integration times by achieving measuring rates of 10 ms. The method was validated using the ternary system of toluene–water–acetone. … Show more

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“…Currently, there are various inline measurement methods for microreactor analysis, including spectroscopic methods. Raman is widely used in studies for diffusion and interdiffusion processes in microchannels [ 7 , 8 ]. Raman spectroscopy was also used for interdiffusion analysis with liquids, such as a water and glycerol-water mixture, with different viscosities [ 9 ] or for monitoring the hydrolysis of acetal in microreactors [ 3 ].…”
Section: Introductionmentioning
confidence: 99%
“…Currently, there are various inline measurement methods for microreactor analysis, including spectroscopic methods. Raman is widely used in studies for diffusion and interdiffusion processes in microchannels [ 7 , 8 ]. Raman spectroscopy was also used for interdiffusion analysis with liquids, such as a water and glycerol-water mixture, with different viscosities [ 9 ] or for monitoring the hydrolysis of acetal in microreactors [ 3 ].…”
Section: Introductionmentioning
confidence: 99%