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Effect of Air Injection on Nucleation Rates: An Approach from Induction Time Statistics

机译：空气喷射对成核率的影响：归纳时间统计的一种方法

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摘要

From disruption of the supersaturated solution to improved mass transfer in the crystallizing suspension, the introduction of a moving gas phase in a crystallizer could lead to improved rates of nucleation and crystal growth. In this work, saturated air has been injected to batch crystallizers to study the effects on formation of the first crystal and subsequent turbidity buildup. To account for the typically large sample-to-sample variation, nucleation rates were evaluated for a large number-of replicates using probability distributions of induction times. The Slope and the intercept of the distributions were studied independently, allowing the simultaneous determination of the mean induction time and a certain detectiOn delay related: to the rate of crystal growth after formation of the first nucleus. When saturated air was injected in aqueous glycine solutions, the average detection delay was reduced from 69 to 13min, and the mean induction time,decreased from 128 to 36 Min. The effect on aqueous solutions of L-arginine was less apparent, With a detection delay reduction from 15 to 3 min, and no significant-changes on the rate of primary nucleation. These results demonstrate the potential of. this technique for reduction in nucleation induction time and improved mass deposition rates in crystallization operations.
机译：通过破坏超饱和溶液以改善结晶悬浮液中的质量转移，在结晶器中引入移动气相可能导致成核和晶体生长的提高。在这项工作中，已经注射饱和空气以批量结晶器，以研究对第一晶体和随后的浊度堆积形成的影响。为了考虑通常大的样品到样本变化，使用诱导时间的概率分布评估大量复制的成核速率。独立研究了分布的斜坡和截距，允许同时测定平均诱导时间和某个检测延迟相关：在形成第一核后的晶体生长速率。当在甘氨酸水溶液中注入饱和空气时，平均检测延迟从69℃降低，平均诱导时间从128℃降至36分钟。对L-精氨酸水溶液的影响不太明显，检测延迟从15-3分钟降低，并且对原核的速率没有显着变化。这些结果表明了。该技术用于降低成核诱导时间和结晶作用中的提高质量沉积速率。

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  • 来源
    《Crystal growth & design》 |2017年第6期|共8页
  • 作者

    Capellades Gerard; Kiil Soren; Dam-Johansen Kim; Mealy Michael J.; Christensen Troels V.; Myerson Allan S.;

  • 作者单位

    Tech Univ Denmark Dept Chem &

    Biochem Engn Bldg 229 DK-2800 Lyngby Denmark;

    Tech Univ Denmark Dept Chem &

    Biochem Engn Bldg 229 DK-2800 Lyngby Denmark;

    Tech Univ Denmark Dept Chem &

    Biochem Engn Bldg 229 DK-2800 Lyngby Denmark;

    H Lundbeck &

    Co AS Oddenvej 182 DK-4500 Nykobing Sjaelland Denmark;

    H Lundbeck &

    Co AS Oddenvej 182 DK-4500 Nykobing Sjaelland Denmark;

    MIT Dept Chem Engn E19-502D 77 Massachusetts Ave Cambridge MA 02139 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 晶体学;
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