The effect of microwave on the crystallization process of magnesium carbonate from aqueous solutions
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2018
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Language
en
Pages
9
358-366
358-366
Series
Powder Technology, Volume 328
Abstract
The effect of microwave on reactive crystallization is investigated with magnesium carbonate as the working substance. In the experiments, magnesium carbonate is precipitated by mixing aqueous magnesium sulfate and sodium carbonate solutions in a MSMPR crystallizer located in a microwave reactor. A population balance model along with crystallization kinetics is formulated to assess the influence of microwave energy input on nucleation, growth, agglomeration and breakage during crystallization process. A general high order moment method of classes (HMMC) framework is applied to solve the model numerically. The results show that crystallization kinetics parameters, including the nucleation rate constant (kn), the growth rate constant (kg), the exponent of growth rate (g) and the collision efficiency (Ψag) change significantly due to mass transfer enhancement in microwave field. Meanwhile, the exponent of nucleation (n) and the breakage rate constant (kbr) remain constant or only change slightly. It is further discovered that the crystal suspension attenuates the microwave effect during crystallization process.Description
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Citation
Guo, Z, Han, W, Zhao, W, Li, L, Wang, B, Xiao, Y & Alopaeus, V 2018, ' The effect of microwave on the crystallization process of magnesium carbonate from aqueous solutions ', Powder Technology, vol. 328, 1, pp. 358-366 . https://doi.org/10.1016/j.powtec.2018.01.038