期刊
CRYSTAL GROWTH & DESIGN
卷 15, 期 1, 页码 305-317出版社
AMER CHEMICAL SOC
DOI: 10.1021/cg501368y
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资金
- Consortium for Risk Evaluation with Stakeholder Participation (CRESP)
- Nuclear Energy University Program (NEUP)
- Georgia Research Alliance
- Cecil J. Pete Silas Endowment
A closed-loop strategy is developed for controlling batch cooling multicomponent crystallization. The strategy represents the sequential application of two established feedback control techniques: direct nucleation control followed by supersaturation control. Experimental results show that such a control scheme produces larger crystals (compared to linear cooling crystallization with the same batch time). In using this scheme to control the crystallization of a double salt from a solution containing sodium nitrate and sodium sulfate, we demonstrate the application of supersaturation control to a multicomponent salt crystallization-which requires knowledge of the solubility as a function of temperature, the ability to monitor concentrations in a multicomponent solution, and an appropriate expression for the driving force for crystallization of a salt. In this paper, a methodology for rapidly identifying the solubility of a solute in a multicomponent solution is presented and a new expression for supersaturation-termed the molar supersaturation-is advanced as a measure of the driving force for crystallization of salts.
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