The steady-state and dynamic simulation of cascade distillation system for the production of oxygen-18 isotope from water

doi:10.1016/j.cjche.2016.03.001

›› 2016, Vol. 24 ›› Issue (8): 979-988.DOI: 10.1016/j.cjche.2016.03.001

• Separation Science and Engineering • Previous Articles Next Articles

The steady-state and dynamic simulation of cascade distillation system for the production of oxygen-18 isotope from water

Yunhu Gao¹, Zhihong Xu¹, Kejing Wu², Xiaolu Wang³, Zhaojun Yu¹, Weiyang Fei²

1 Jiangsu Huayi Technology Co., Ltd., Jiangsu 215522, China;
2 State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;
3 China Construction Installation Engineering Co. Ltd, Jiangsu 210049, China

Received:2015-09-11 Revised:2016-01-16 Online:2016-09-21 Published:2016-08-28
Supported by:
Supported by the Jiangsu Province Transformation of Sci-tech Achievements Project (BA2012080).

The steady-state and dynamic simulation of cascade distillation system for the production of oxygen-18 isotope from water

Yunhu Gao¹, Zhihong Xu¹, Kejing Wu², Xiaolu Wang³, Zhaojun Yu¹, Weiyang Fei²

1 Jiangsu Huayi Technology Co., Ltd., Jiangsu 215522, China;
2 State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;
3 China Construction Installation Engineering Co. Ltd, Jiangsu 210049, China

通讯作者: Yunhu Gao
基金资助:
Supported by the Jiangsu Province Transformation of Sci-tech Achievements Project (BA2012080).

Abstract

Abstract: Accurate simulation of water distillation system for oxygen-18 (¹⁸O) isotope separation is necessary to guide industrial practice, since both deuterium (D) and oxygen-18 isotope get enriched and interfere with each other. In the present work, steady-state and dynamic distillation models are established based on a classic method and a cascade distillation system with 5 towers is introduced to test the models. The theoretical expressions of separation factor α_H/D for protium/deuterium and separation factor α¹⁶O/¹⁸O.for oxygen-16/oxygen-18 were derived, with the existence of deuterium and oxygen-18, respectively. The results of the steady-state simulation by the classical method proposed in the present work agreed well with the results of the lumping method. The dynamic process could be divided into 5 stages. Impressively, a peak value of product withdraw was observed before the final steady state, which was resulted from the change of ¹⁶O/¹⁸O separation factor and isotope distribution. An interesting low concentration zone in the towers of T2-T5 existed at the beginning of the dynamic process and it required industrial evidence.

Key words: Oxygen-18, Deuterium, Steady-state simulation, Dynamic simulation, Isotope separation

摘要： Accurate simulation of water distillation system for oxygen-18 (¹⁸O) isotope separation is necessary to guide industrial practice, since both deuterium (D) and oxygen-18 isotope get enriched and interfere with each other. In the present work, steady-state and dynamic distillation models are established based on a classic method and a cascade distillation system with 5 towers is introduced to test the models. The theoretical expressions of separation factor α_H/D for protium/deuterium and separation factor α¹⁶O/¹⁸O.for oxygen-16/oxygen-18 were derived, with the existence of deuterium and oxygen-18, respectively. The results of the steady-state simulation by the classical method proposed in the present work agreed well with the results of the lumping method. The dynamic process could be divided into 5 stages. Impressively, a peak value of product withdraw was observed before the final steady state, which was resulted from the change of ¹⁶O/¹⁸O separation factor and isotope distribution. An interesting low concentration zone in the towers of T2-T5 existed at the beginning of the dynamic process and it required industrial evidence.

关键词: Oxygen-18, Deuterium, Steady-state simulation, Dynamic simulation, Isotope separation

Yunhu Gao, Zhihong Xu, Kejing Wu, Xiaolu Wang, Zhaojun Yu, Weiyang Fei. The steady-state and dynamic simulation of cascade distillation system for the production of oxygen-18 isotope from water[J]. , 2016, 24(8): 979-988.

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The steady-state and dynamic simulation of cascade distillation system for the production of oxygen-18 isotope from water

The steady-state and dynamic simulation of cascade distillation system for the production of oxygen-18 isotope from water

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