Development of an Experimental Method to Measure Nucleation Rates in Reactive Precipitation
| Autor: | C. P. Mark Roelands, Raoul R. W. Roestenberg, PJ Jansens, Joop H. ter Horst, and Herman J. M. Kramer |
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| Rok vydání: | 2004 |
| Předmět: | |
| Zdroj: | Crystal Growth & Design. 4:921-928 |
| ISSN: | 1528-7505 1528-7483 |
| DOI: | 10.1021/cg034188k |
| Popis: | Measurement of the stationary nucleation rate as a function of supersaturation in reactive precipitation requires that nucleation and growth of the crystals to an observable size take place under well-controlled hydrodynamic conditions and at a constant supersaturation. An experimental method was chosen that is based on the measurement of the increase of the particle concentration with the increase of the residence time in a precipitation tube. This method was applied to measure the nucleation rate for the pH shift precipitation of the molecular compound H4EDTA. The parameters A and B in the classical nucleation theory equation were derived from the measured nucleation rates. A value of A = (5.7 ± 1.0) × 1015 m-3 s-1 was found for the intercept with the ordinate and a value of B = (3.3 ± 2.0) × 102 was found for the slope. The estimated value for parameter A is lower than the theoretical value of AHON = 1033 m-3 s-1 for homogeneous nucleation. Using the experimentally determined value for B the interfacia... |
| Databáze: | OpenAIRE |
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