Abstract The simulation of the thermodynamic properties and phase equilibria in the Li2CO3 - H2O system was carried out on the basis of the experimental data obtained by potentiometry method in the previous work of the authors and literature data on liquidus. The Pitzer – Harvie model of the ionic interactions in the solution was applied. The goal function included pH and potentiometric experimental data for lithium carbonate in the solution, as well as liquidus data. The optimization refers to the temperature range (273-373) K and CO2 partial pressure range (10-4 – 10-1) MPa. The final set of model parameters consists of three values corresponding to the interaction between Li+ and CO32- ions.

中文翻译：

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固定 CO2 压力下 Li2CO3 水溶液的热力学模拟

摘要 根据作者前人工作中电位法获得的实验数据和液相线文献资料，对Li2CO3-H2O体系的热力学性质和相平衡进行了模拟。应用了溶液中离子相互作用的 Pitzer-Harvie 模型。目标函数包括溶液中碳酸锂的 pH 值和电位实验数据，以及液相线数据。优化是指温度范围 (273-373) K 和 CO2 分压范围 (10-4 – 10-1) MPa。最后一组模型参数由三个值组成，对应于 Li+ 和 CO32- 离子之间的相互作用。