连续结晶器中十水草酸铈反应结晶动力学研究

摘要采用连续稳态法,对十水草酸铈在混合悬浮、混合产品排出(MSMPR)结晶器中的连续反应结晶动力学进行了研究。实验测定了十水草酸铈晶体的粒数密度分布数据,并以此为基础,基于粒度无关生长速率模型,对不同实验条件下晶体的粒数密度分布数据进行拟合,确定了十水草酸铈的成核动力学方程和生长动力学方程,并计算得到十水草酸铈晶体的成核、生长速率相对于过饱和度的指数分别为4.211和0.752。同时,对方程的理论分析表明,低过饱和度有利于得到平均粒径更大的十水草酸铈晶体。十水草酸铈结晶动力学的研究,为其大规模工业生产提供了重要的动力学数据。

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	谢非
	黄云海
	吴德慧
	侯学锋
	苑斯雯
	周冠辰
	杨金月
	田贝倩
	郝红勋

关键词：十水草酸铈连续反应结晶结晶动力学成核速率生长速率

Abstract： The kinetics of continuous reaction crystallization of cerium oxalate decahydrate in a mixed suspension-mixed product-removal (MSMPR) crystallizer was studied using the continuous steady state method. Based on the grain size independent growth rate model, the obtained particle population density distribution data were used to determine the nucleation kinetic equation and growth kinetic equation of cerium oxalate decahydrate under different experimental conditions by regression. The index of the nucleation and growth rate of cerium oxalate decahydrate crystal relative to the supersaturation is calculated to be 4.211 and 0.752, respectively. Theoretical analysis of the equations showed that low supersaturation was beneficial to the preparation of cerium oxalate decahydrate crystals with larger average particle size. The kinetic study of cerium oxalate decahydrate crystal would provide important kinetic data for its large-scale industrial production.

Keywords： cerium oxalate decahydrate continuous reaction crystallization crystallization kinetics nucleation rate growth rate

Received 2021-07-09;

Fund:国家自然科学基金(21978201)。

Corresponding Authors: 郝红勋,教授,E-mail:hongxunhao@tju.edu.cn。 Email: hongxunhao@tju.edu.cn

About author: 谢非(1990-),男,硕士,工程师,现从事军工科研设计方面的研究。

引用本文:

谢非, 黄云海, 吴德慧, 侯学锋, 苑斯雯, 周冠辰, 杨金月, 田贝倩, 郝红勋.连续结晶器中十水草酸铈反应结晶动力学研究[J]. 化学工业与工程, 2022,39(3): 42-48

XIE Fei, HUANG Yunhai, WU Dehui, HOU Xuefeng, YUAN Siwen, ZHOU Guanchen, YANG Jinyue, TIAN Beiqian, HAO Hongxun.Kinetics of reaction crystallization of cerium oxalate decahydrate in continuous crystallizer[J]. Chemcial Industry and Engineering, 2022,39(3): 42-48

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