Microscopic insight into the ion aggregation characteristics in aqueous MgCl2 and MgCl2–LiCl solutions: Implications for Mg2+/Li+ separation
Microscopic insight into the ion aggregation characteristics in aqueous MgCl2 and MgCl2–LiCl solutions: Implications for Mg2+/Li+ separation
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微观洞察 MgCl2 和 MgCl2−LiCl 水溶液中的离子聚集特征:对 Mg2/Li 分离的影响
DOI:
10.1016/j.molliq.2018.10.059
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发表时间:
2019
影响因子:
6
通讯作者:
Yi Hai-Bo
中科院分区:
文献类型:
--
作者:
Cai Hou-Qin;Li Hui-Ji;Wang Mei;Wang Chun-Chang;Yi Hai-Bo
The ion aggregation trend for nucleation in MgCl2and MgCl2–LiCl solutions has been investigated by density functional theory (DFT) and molecular dynamics (MD) simulations. The DFT results show that the solvent-separated Mg2+–Cl−conformers of the mixed LiCl·MgCl2·7H2O clusters are more stable than their contact-associated Mg2+–Cl−isomers in the dilute MgCl2–LiCl aqueous solution. The contact-associated Mg2+−Cl−structures become dominant in the concentrated MgCl2and MgCl2–LiCl solutions, while the Cl−ions can be more frequently found in the second shell than in the first shell of the Mg2+ions. The aggregation characteristics indicate that the solvent-separated Mg2+–Cl−association is more likely correlated to the aggregation process for nucleation in MgCl2and MgCl2–LiCl solutions, whereas the contact-associated Mg2+–Cl−structures may be correlated to the supersaturation of the MgCl2aqueous solution or MgCl2–LiCl brines. The evolution of the clusters shows that the solvent-separated Mg2+–Cl−mixed clusters can markedly enlarge, while this is not the case for contact associated Mg2+–Cl−mixed clusters during the simulation. The MD simulations reveal that the trends of solvent-separated Mg2+–Cl−association and contact Li+–Cl−association around Mg2+ions become synchronized in MgCl2–LiCl brines with a low Mg/Li ratio, in which LiCl·MgCl2·7H2O double salt can be formed.
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影响因子:
2.9
作者:
C. Pye;W. Rudolph
通讯作者:
C. Pye;W. Rudolph
影响因子:
3.3
作者:
Li Hui-Ji;Yan Dan;Cai Hou-Qin;Yi Hai-Bo;Min Xiao-Bo;Xia Fei-Fei
通讯作者:
Xia Fei-Fei
DOI:
10.1021/jp507008x
发表时间:
2015-01-08
期刊:
The journal of physical chemistry. B
影响因子:
--
作者:
Saxena A;García AE
通讯作者:
García AE
影响因子:
4.2
作者:
Chitrakar, Ramesh;Makita, Yoji;Sonoda, Akinari
通讯作者:
Sonoda, Akinari
影响因子:
9.9
作者:
A. Hamzaoui;A. M’nif;H. Hammi;R. Rokbani
通讯作者:
A. Hamzaoui;A. M’nif;H. Hammi;R. Rokbani