Radial diffusion model for fragrance materials: Prediction and validation

A predictive model based on Fick's second law for radial diffusion is proposed and validated for modeling the diffusion of fragrance materials. A pure component, two binary systems, and a ternary system were used for validation. The model combines the prediction model to represent the liquid ph...

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Bibliographic Details
Published in:AIChE journal 2021-10, Vol.67 (10), p.n/a
Main Authors: Almeida, Rafael N., Rodrigues, Alírio E., Vargas, Rubem M. F., Cassel, Eduardo
Format: Article
Language:English
Subjects:
Binary systems
Diffusion
Diffusion chambers
evaporation
Fick's second law
Flame ionization detectors
Fragrances
Gas chromatography
Headspace
Ionization
Liquid phases
mathematical modeling
Mathematical models
Odors
perfume
Prediction models
Predictions
Ternary systems
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Summary:A predictive model based on Fick's second law for radial diffusion is proposed and validated for modeling the diffusion of fragrance materials. A pure component, two binary systems, and a ternary system were used for validation. The model combines the prediction model to represent the liquid phase nonidealities, using the UNIFAC group contribution method, with the Fickian radial diffusion approach. The experimental headspace concentrations were measured in a diffusion chamber using the solid‐phase microextraction technique and quantified using gas chromatography with a flame ionization detector. The numerical solutions were obtained along with an analytical model considering constant surface concentration. The odor intensities of the studied systems were calculated using Stevens' power law and the strongest component model, respectively. The numerical simulation presented good adherence to the experimental gas concentration data. The proposed methodology is an efficient and validated tool to assess the radial diffusion of fragrance and volatile systems.
ISSN:0001-1541
1547-5905
DOI:10.1002/aic.17351