Vaporization model of MgCl2-CaCl2 binary melts in fluidized bed

doi:10.1016/j.cjche.2016.07.001

›› 2017, Vol. 25 ›› Issue (1): 123-129.DOI: 10.1016/j.cjche.2016.07.001

• Chemical Engineering Thermodynamics • Previous Articles Next Articles

Vaporization model of MgCl₂-CaCl₂ binary melts in fluidized bed

Qiao Wang^1,2, Qingshan Zhu¹, Chuanlin Fan¹, Zhen Wang¹, Hongzhong Li¹

1 State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China

Received:2016-03-10 Revised:2016-07-03 Online:2017-02-15 Published:2017-01-28
Supported by:
Supported by the National Natural Science Foundation of China (NSFC) Distinguished Young Scholar project (No. 21325628).

Vaporization model of MgCl₂-CaCl₂ binary melts in fluidized bed

Qiao Wang^1,2, Qingshan Zhu¹, Chuanlin Fan¹, Zhen Wang¹, Hongzhong Li¹

1 State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China

通讯作者: Qingshan Zhu,E-mail address:qszhu@ipe.ac.cn
基金资助:
Supported by the National Natural Science Foundation of China (NSFC) Distinguished Young Scholar project (No. 21325628).

Abstract

Abstract: The present study investigated the vaporization kinetics of MgCl₂, CaCl₂ and their binary melts in a fluidized bed at 1073-1273 K, and developed a vaporization model for the binary melts to explore the possibility of achieving enhanced vaporization rate for the feedstock containing CaO greater than 0.2 wt%. The vaporization rate constant of MgCl₂ is more than seven times than that of CaCl₂ at 1273 K. The vaporization rate of the binary melt was significantly affected by the composition, a small quantity of CaCl₂ can remarkably deteriorate the overall vaporization rate. Experimental results coincide well with the numerical simulation by the vaporization model which regards the evolution of vaporization rate with melts composition. A correlation between the necessary operation temperature and the CaO/(CaO+MgO) of the feedstock was proposed. Predictions reveal that a similar vaporization rate for 0.2 wt%-0.4 wt% CaO content feedstock with 0.2 wt% could be achieved at lower than 1365 K.

Key words: MgCl₂, CaCl₂, Binary melts, Vaporization kinetics, Kinetics model

摘要： The present study investigated the vaporization kinetics of MgCl₂, CaCl₂ and their binary melts in a fluidized bed at 1073-1273 K, and developed a vaporization model for the binary melts to explore the possibility of achieving enhanced vaporization rate for the feedstock containing CaO greater than 0.2 wt%. The vaporization rate constant of MgCl₂ is more than seven times than that of CaCl₂ at 1273 K. The vaporization rate of the binary melt was significantly affected by the composition, a small quantity of CaCl₂ can remarkably deteriorate the overall vaporization rate. Experimental results coincide well with the numerical simulation by the vaporization model which regards the evolution of vaporization rate with melts composition. A correlation between the necessary operation temperature and the CaO/(CaO+MgO) of the feedstock was proposed. Predictions reveal that a similar vaporization rate for 0.2 wt%-0.4 wt% CaO content feedstock with 0.2 wt% could be achieved at lower than 1365 K.

关键词: MgCl₂, CaCl₂, Binary melts, Vaporization kinetics, Kinetics model

Qiao Wang, Qingshan Zhu, Chuanlin Fan, Zhen Wang, Hongzhong Li. Vaporization model of MgCl₂-CaCl₂ binary melts in fluidized bed[J]. , 2017, 25(1): 123-129.

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Vaporization model of MgCl₂-CaCl₂ binary melts in fluidized bed

Vaporization model of MgCl₂-CaCl₂ binary melts in fluidized bed

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