Micromixing efficiency in a T-shaped confined impinging jet reactor

doi:10.1016/j.cjche.2014.11.024

›› 2015, Vol. 23 ›› Issue (2): 350-355.DOI: 10.1016/j.cjche.2014.11.024

• FLUID DYNAMICS AND TRANSPORT PHENOMENA • Previous Articles Next Articles

Micromixing efficiency in a T-shaped confined impinging jet reactor

Zhengming Gao, Jing Han, Yuyun Bao, Zhipeng Li

State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

Received:2013-06-25 Revised:2014-01-17 Online:2015-03-01 Published:2015-02-28
Supported by:
Supported by the National Natural Science Foundation of China (21206002, 21121064, 20990224) and the State Key Laboratory of Chemical Engineering (SKL-ChE-13A03).

Micromixing efficiency in a T-shaped confined impinging jet reactor

Zhengming Gao, Jing Han, Yuyun Bao, Zhipeng Li

State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

通讯作者: Zhipeng Li
基金资助:
Supported by the National Natural Science Foundation of China (21206002, 21121064, 20990224) and the State Key Laboratory of Chemical Engineering (SKL-ChE-13A03).

Abstract

Abstract: Confined impinging jet reactor (CIJR) offers advantages for chemical rapid processes and has become an important new reactor used in the chemical industry. The micromixing efficiency in a T-shaped CIJR for two tubes of inner diameter of 3 mm was studied by using a parallel competing iodide-iodate reaction as the working system. In this work, the effects of different operating conditions, such as impinging velocity and acid concentration, on segregation index were investigated. In addition, the effects of the inner nozzles diameter and the distance L between the jet axis and the top wall of the mixing chamber on the micromixing efficiency were also considered. It is concluded that the best range of L in this CIJR is 6.5-12.5 mm. Based on the incorporation model, the estimated minimum micromixing time t_m of CIJR approximately equals to 2×10^-4 s. These experimental results indicate clearly that CIJR possesses a much better micromixing performance compared with the conventional stirred tank (micromixing time of 2×10^-3 to 2×10^-2 s). Hence, it can be envisioned that CIJR hasmore promising applications in various industrial processes.

Key words: Impinging jet reactor, Micromixing, Segregation index, Incorporation model

摘要： Confined impinging jet reactor (CIJR) offers advantages for chemical rapid processes and has become an important new reactor used in the chemical industry. The micromixing efficiency in a T-shaped CIJR for two tubes of inner diameter of 3 mm was studied by using a parallel competing iodide-iodate reaction as the working system. In this work, the effects of different operating conditions, such as impinging velocity and acid concentration, on segregation index were investigated. In addition, the effects of the inner nozzles diameter and the distance L between the jet axis and the top wall of the mixing chamber on the micromixing efficiency were also considered. It is concluded that the best range of L in this CIJR is 6.5-12.5 mm. Based on the incorporation model, the estimated minimum micromixing time t_m of CIJR approximately equals to 2×10^-4 s. These experimental results indicate clearly that CIJR possesses a much better micromixing performance compared with the conventional stirred tank (micromixing time of 2×10^-3 to 2×10^-2 s). Hence, it can be envisioned that CIJR hasmore promising applications in various industrial processes.

关键词: Impinging jet reactor, Micromixing, Segregation index, Incorporation model

Zhengming Gao, Jing Han, Yuyun Bao, Zhipeng Li. Micromixing efficiency in a T-shaped confined impinging jet reactor[J]. , 2015, 23(2): 350-355.

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Micromixing efficiency in a T-shaped confined impinging jet reactor

Micromixing efficiency in a T-shaped confined impinging jet reactor

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