Predicting the lifetime of organic vapor cartridges exposed to volatile organic compound mixtures using a partial differential equations model
| Autor: | Stéphanie Marsteau, François Vuong, Georges Grevillot, Eric Silvente, Cécile Vallières, Romain Chauveau |
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| Přispěvatelé: | Institut national de recherche et de sécurité (Vandoeuvre lès Nancy) (INRS ( Vandoeuvre lès Nancy)), Laboratoire Réactions et Génie des Procédés (LRGP), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2016 |
| Předmět: |
Cyclohexane
Kinetics Thermodynamics Air Pollutants Occupational 02 engineering and technology Heptanes Acetone [SPI]Engineering Sciences [physics] chemistry.chemical_compound Adsorption 020401 chemical engineering Cyclohexanes Mass transfer [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering Volatile organic compound Respiratory Protective Devices Physics::Chemical Physics 0204 chemical engineering ComputingMilieux_MISCELLANEOUS chemistry.chemical_classification Volatile Organic Compounds Heptane Partial differential equation Chromatography Ethanol Public Health Environmental and Occupational Health Models Theoretical 021001 nanoscience & nanotechnology chemistry Equipment Failure Volatilization 0210 nano-technology |
| Zdroj: | Journal of Occupational and Environmental Hygiene Journal of Occupational and Environmental Hygiene, Taylor & Francis, 2016, 13 (9), pp.675-689. ⟨10.1080/15459624.2016.1166368⟩ |
| ISSN: | 1545-9632 1545-9624 |
| DOI: | 10.1080/15459624.2016.1166368 |
| Popis: | In this study, equilibria, breakthrough curves, and breakthrough times were predicted for three binary mixtures of four volatile organic compounds (VOCs) using a model based on partial differential equations of dynamic adsorption coupling a mass balance, a simple Linear Driving Force (LDF) hypothesis to describe the kinetics, and the well-known Extended-Langmuir (EL) equilibrium model. The model aims to predict with a limited complexity, the BTCs of respirator cartridges exposed to binary vapor mixtures from equilibria and kinetics data obtained from single component. In the model, multicomponent mass transfer was simplified to use only single dynamic adsorption data. The EL expression used in this study predicted equilibria with relatively good accuracy for acetone/ethanol and ethanol/cyclohexane mixtures, but the prediction of cyclohexane uptake when mixed with heptane is less satisfactory. The BTCs given by the model were compared to experimental BTCs to determine the accuracy of the model and the impact of the approximation on mass transfer coefficients. From BTCs, breakthrough times at 10% of the exposure concentration t10% were determined. All t10% were predicted within 20% of the experimental values, and 63% of the breakthrough times were predicted within a 10% error. This study demonstrated that a simple mass balance combined with kinetic approximations is sufficient to predict lifetime for respirator cartridges exposed to VOC mixtures. It also showed that a commonly adopted approach to describe multicomponent adsorption based on volatility of VOC rather than adsorption equilibrium greatly overestimated the breakthrough times. |
| Databáze: | OpenAIRE |
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