Affiliation:
1. Hochschule Mannheim University of Applied Sciences Center for Mass Spectrometry and Optical Spectroscopy Paul-Wittsack-Straße 10 68163 Mannheim Germany
2. Technische Universität Braunschweig Institute for Chemical and Thermal Process Engineering Langer Kamp 7 38106 Braunschweig Germany
Abstract
AbstractA method for molecule‐sensitive, non‐contact and marker‐free 3D mapping of vertical falling liquid films using Raman spectroscopy is presented. Technical liquid films are common in many applications in the chemical industry such as columns, evaporators, dryers and absorbers/desorbers. Measurements of an aqueous sodium sulfate film on a plain surface with a small pyramid attached to it, as well as a pillow plate are presented using a 3D surface plot. Suppressing surface gloss as well as other optical reflections from the metallic backplates is realized by using only inelastic light scattering and mathematical background correction. The results show that liquid mapping with Raman spectroscopy is possible and 3D maps can be created from different structured surfaces.
Subject
Industrial and Manufacturing Engineering,General Chemical Engineering,General Chemistry