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dc.contributor.authorWagner, Claas
dc.contributor.authorIhunegbo, Felicia Nkem
dc.contributor.authorHalstensen, Maths
dc.contributor.authorEsbensen, Kim H.
dc.date.accessioned2013-04-12T06:59:20Z
dc.date.accessioned2017-04-19T12:49:55Z
dc.date.available2013-04-12T06:59:20Z
dc.date.available2017-04-19T12:49:55Z
dc.date.issued2012
dc.identifier.citationWagner, C., Ihunegbo, F.N., Halstensen, M. & Esbensen, K.H. Acoustic chemometrics for material composition quantification in pneumatic conveying - The critical role of representative reference sampling. Powder Technology. 2013, 237, p. 506-513
dc.identifier.issn0032-5910
dc.identifier.urihttp://hdl.handle.net/11250/2438426
dc.description.abstractReliable monitoring of pneumatically conveyed particulate materials is critical for online detection and controlling material composition changes in the regimen of Process Analytical Technology (PAT), e.g. as the case investigated here: determination of varying concentration levels of extraneous material in a source stream. Results are reported from an experimental test campaign on a pilot-scale pneumatic conveying facility. Optimal sensor deployment and material flow rates are decisive parameters for signal quality and prediction performance. The test campaign resulted in an optimal sensor location/flow rate combination, based on which we present a validated prediction model (Partial Least Squares Regression model) for prediction of extraneous material concentration levels, with a RMSEP(rel) of 17.7% (RMSEP: 0.92) and r2 of 0.95. The present approach is based on acoustic chemometrics (a.c.). The impact of nominal reference values vs. representative reference values used as response variables in prediction models is discussed. Optimal reference values were obtained through the use of representative sampling equipment (based on Theory of Sampling, TOS), specifically designed for pneumatic conveying systems, and compared with nominal concentration levels, allowed an improvement of the prediction model: (RMSEP(rel), of 15% (RMSEP: 0.85) and r2 0.95). While the present experimental rig test resulted in relative minor quantitative improvements only, representative reference samples, required for prediction models, are essential when nominal concentration levels cannot be determined or are unknown, which is usually the case in enclosed pneumatic conveying systems, the target for this study. All prediction results are validated with independent data (test set validation)
dc.language.isoeng
dc.subjectProcess Analytical Technology
dc.subjectacoustic chemometrics
dc.subjectpneumatic conveying
dc.subjectchemometrics
dc.subjectreference sampling
dc.titleAcoustic chemometrics for material composition quantification in pneumatic conveying - The critical role of representative reference sampling
dc.typeJournal article
dc.typePeer reviewed
dc.description.versionAccepted version
dc.rights.holder© Copyright Elsevier. All rights reserved
dc.subject.nsi562
dc.identifier.doihttp://dx.doi.org/10.1016/j.powtec.2012.12.036


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