Practical Identifiability Analysis for the Characterization of Mass Transport Properties in Migration Tests

Brais Martinez-Lopez, Stephane Peyron, Nathalie Gontard, Miguel Mauricio Iglesias

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The common assumption of considering external mass transfer resistance as negligible can lead to a systematic bias that underestimates the actual diffusivity value. In this context, the suitability of two methods and the possible experimental setups (global or local concentration measurements) for determination of both diffusivity and mass transfer coefficient are discussed. The assessment was based on the experimental results of the desorption of Uvitex OB from low density polyethylene into the food simulant Miglyol 829. A practical identifiability analysis performed for each of the methods and experimental setups demonstrated that the increased amount of information provided by local measurement methods allows a better identifiability of the parameters, thereby reducing the experimental work and providing an unbiased method for determination of diffusivity.
Original languageEnglish
JournalIndustrial and Engineering Chemistry Research
Volume54
Issue number17
Pages (from-to)4725-4736
Number of pages12
ISSN0888-5885
DOIs
Publication statusPublished - 2015
Externally publishedYes

Keywords

  • Chemical Engineering (all)
  • Chemistry (all)
  • Industrial and Manufacturing Engineering
  • Diffusion
  • Amount of information
  • Concentration Measurement
  • External mass transfer
  • Identifiability
  • Local measurement
  • Migration tests
  • Practical identifiability
  • Systematic bias
  • Mass transfer
  • ENGINEERING,
  • PHENOLIC ANTIOXIDANT MIGRATION
  • BATCH EXTRACTION
  • FOOD SIMULANTS
  • DIFFUSION
  • PARAMETERS
  • ADDITIVES
  • CONTACT
  • POLYOLEFINS
  • SIMULATION
  • POLYMERS

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