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Sensors 2016, 16(3), 300;

Advancement of an Infra-Red Technique for Whole-Field Concentration Measurements in Fluidized Beds

Chemical Process Intensification, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, De Rondom 70, 5612 AP Eindhoven, The Netherlands
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Academic Editor: Vincenzo Spagnolo
Received: 11 January 2016 / Revised: 16 February 2016 / Accepted: 22 February 2016 / Published: 27 February 2016
(This article belongs to the Special Issue Infrared and THz Sensing and Imaging)
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For a better understanding and description of the mass transport phenomena in dense multiphase gas-solids systems such as fluidized bed reactors, detailed and quantitative experimental data on the concentration profiles is required, which demands advanced non-invasive concentration monitoring techniques with a high spatial and temporal resolution. A novel technique based on the selective detection of a gas component in a gas mixture using infra-red properties has been further developed. The first stage development was carried out using a very small sapphire reactor and CO2 as tracer gas. Although the measuring principle was demonstrated, the real application was hindered by the small reactor dimensions related to the high costs and difficult handling of large sapphire plates. In this study, a new system has been developed, that allows working at much larger scales and yet with higher resolution. In the new system, propane is used as tracer gas and quartz as reactor material. In this study, a thorough optimization and calibration of the technique is presented which is subsequently applied for whole-field measurements with high temporal resolution. The developed technique allows the use of a relatively inexpensive configuration for the measurement of detailed concentration fields and can be applied to a large variety of important chemical engineering topics. View Full-Text
Keywords: IR; fluidized bed membrane reactor; mass transfer; concentration polarization IR; fluidized bed membrane reactor; mass transfer; concentration polarization

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Medrano, J.A.; de Nooijer, N.C.A.; Gallucci, F.; van Sint Annaland, M. Advancement of an Infra-Red Technique for Whole-Field Concentration Measurements in Fluidized Beds. Sensors 2016, 16, 300.

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