Solubility of Carbon Dioxide in LiF-Li2CO3 Molten Salt System
Solubility of Carbon Dioxide in LiF-Li2CO3 Molten Salt System
复制标题
二氧化碳在 LiF-Li2CO3 熔盐体系中的溶解度
DOI：
10.1021/acs.jced.6b00043
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发表时间：
2016
影响因子：
--
通讯作者：
Wang Zhaowen
中科院分区：
文献类型：
--
作者：
Shi Zhongning;Deng Wentao;Song Xiaowen;Hu Xianwei;Gao Bingliang;Wang Zhaowen
用压差法测定了二氧化碳在lif - li2co3熔盐体系中的溶解度。随着保温温度的升高，co2在lif - li2co3熔体中的溶解度迅速降低。考察了XF（X = K, Na）含量为5% ~ 25%的碱金属氟化物对co22溶解度的影响。co22在LiF-Li2CO3-XF熔体中的溶解度随着XF温度和浓度的升高而降低。计算出的溶解在这些熔体中的co2的热力学数据表明，co2与碳酸盐离子之间的反应是放热的。在630℃时，KF比NaF更有效地降低了co22的溶解度。当LiF的摩尔分数为50%时，在640℃时，LiF - li2co3的溶解度达到6.8 × 10-4 （molCO2/molmelt）。
The solubility of carbon dioxide in a LiF–Li2CO3molten salt system was determined using a pressure differential method. With increasing holding temperature, the solubility of CO2in LiF–Li2CO3melts decreases rapidly. The influence of the alkali metal fluoride of XF(X = K, Na) content from 5% to 25% on the CO2solubility was considered. The CO2solubility in LiF–Li2CO3–XF melts decreased with increasing temperature and concentration of XF. The calculated thermodynamic data for CO2dissolved in these melts revealed that the reaction between CO2and a carbonate ion was exothermic. At 630 °C, KF decreased the CO2solubility more effectively than NaF. When the mole fraction of LiF was 50% in LiF–Li2CO3, the CO2solubility reached a maximum of 6.8 × 10–4(molCO2/molmelt) at 640 °C.