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Crystal Growth Mechanisms, Transport Enhanced Crystallization

机译:晶体生长机制,传输增强结晶

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Much of the literature on wax (n-alkane) crystallization has to do with crystal form and properties, intraconversion of polymorphs and phases. Many researchers use differential scanning calorimetry (DSC) to study these topics, but a few such DSC studies have also pursued associated kinetics issues. Because DSC deals with pure waxes (without solvents) such work of necessity involves melt crystallization however and not solvent cast (or solution) crystallization. We seek solvent cast kinetics information for the purpose of modeling that process. However, solvent cast crystallization in a watch glass crystallizer of earlier studies is a complex process that involves transport elements of solvent removal, solute diffusion, kinetics elements, and so forth. Comprehensive modeling may not be possible without the kinetic and other information. Still we desire a predictor of that complex process. Kinetics are not crucial for herein we find a pseudo diffusion coefficient equivalent parameter whose relatively straightforward use alone with the transport enhanced crystallizer model will predict the complex real process, the predictor we seek.
机译:关于蜡(正构烷烃)结晶的许多文献都与晶型和性质,多晶型物和相的内部转化有关。许多研究人员使用差示扫描量热法(DSC)来研究这些主题,但是一些此类DSC研究也追求了相关的动力学问题。因为DSC处理纯蜡(不含溶剂),所以这种必要的工作涉及熔体结晶,而不涉及溶剂浇铸(或溶液)结晶。我们寻求溶剂浇铸动力学信息,以对该过程进行建模。然而,较早研究的手表玻璃结晶器中的溶剂浇铸结晶是复杂的过程,涉及溶剂去除,溶质扩散,动力学元素等的传输元素。没有动力学和其他信息,可能无法进行全面建模。我们仍然希望能够预测到这一复杂过程。动力学对于这里不是至关重要的,我们找到一个伪扩散系数等效参数,将其与运输增强结晶器模型一起使用时相对简单直接即可预测我们寻求的复杂实际过程。

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