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Thermogravimetry as a screening tool for the estimation of the vapor pressures of pure compounds |
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| Authors: | Federica Barontini V Cozzani |
| Institution: | (1) Dipartimento di Ingegneria Chimica, Chimica Industriale e Scienza dei Materiali, Università degli Studi di Pisa, Via Diotisalvi 2, 56126 Pisa, Italy;(2) Dipartimento di Ingegneria Chimica, Mineraria e delle Tecnologie Ambientali, Alma Mater Studiorum, Università di Bologna, Viale Risorgimento 2, 40136 Bologna, Italy |
| Abstract: | A simplified approach was developed to estimate the vapor pressure of pure compounds from experimental data obtained by isothermal thermogravimetric (TG) analysis. A numerical procedure was developed to estimate the Antoine parameters of the substance by the analysis of isothermal TG data. The results of the experimental validations carried out evidenced that at least a preliminary estimation of vapour pressures of pure substances by the analysis of TG data is possible. The limited time and the reduced amounts of sample required for the experimental runs make the technique attractive with respect to the conventional and more accurate techniques for vapor pressure assessment. |
| Keywords: | diffusive evaporation evaporation rate thermogravimetric analysis vapor pressure |
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