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Acoustic chemometry: non-invasive on-line measurements on complex fluids
2002 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Due to higher production speeds, frequent change of manufactured products and greater environmental awareness both from customers and governments, more industries strive to exchange their traditional analytical methods for, more effective, on-line measurements. The aim of this project is to develop a method for on-line measurement of characteristics in complex process flows. The method should also be robust, cost effective and non- invasive. Acoustic chemometry is a method for on-line measurements, based on equipment with acoustic sensors, followed by signal processing and multivariate data analysis. A pilot plant was built to investigate if it is possible to use acoustic chemometry to examine the amount of oils contaminating an emulsion. Experiments were performed by adding different mixtures of three types of oils to a rolling emulsion. For every addition to the emulsion, frequency spectra were measured. Multivariate analysis was performed to investigate if the concentrations of the different oils could be predicted by measuring the frequency spectra of the emulsion. The analysis of the experiments gave very good results: a model with a prediction grade of over 98% was received. Those fantastic results show that the method work very well for the application investigated and the method can thus be expected to work for other types of applications as well. For many industries this type of on-line measurement method can be an extremely important tool in improving quality, economics and the environment. It is thus in the future worth considering a commercialisation of the method.

Place, publisher, year, edition, pages
Keyword [en]
Technology, Chemistry, Chemometry, Acoustics
Keyword [sv]
URN: urn:nbn:se:ltu:diva-47362ISRN: LTU-EX--02/049--SELocal ID: 4eaeeca7-7d17-444e-9a55-c53572fdb1daOAI: diva2:1020683
Subject / course
Student thesis, at least 30 credits
Educational program
Chemical Engineering, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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