Bruzon D A V, Tapang G A, Martinez I S
Institute of Chemistry, University of the Philippines-Diliman, Quezon City 1101, Philippines.
National Institute of Physics, University of the Philippines-Diliman, Quezon City 1101, Philippines.
Rev Sci Instrum. 2021 Feb 1;92(2):024102. doi: 10.1063/5.0019479.
An electrochemical setup was designed and built to evaluate carbon dioxide solubility in ionic liquids. The setup can simultaneously measure amounts of CO in the gas and in the ionic liquid phase, making it very useful for in situ electrochemical measurements. The home-built glass cell is able to withstand high vacuum allowing the ionic liquid samples to be properly evacuated before characterization and kept free of contaminants during experiments. A pressure gauge attached to the setup enables continuous monitoring of gas added to the system. This kind of configuration can measure gas solubility in ionic liquids expressed as Henry's constants determined from generated plots of dissolved gas concentration in the ionic liquid vs headspace gas pressure. It also serves as a more economical alternative to other gas solubility measurement techniques, as it is predominantly made of glass, and requires minimal sample amounts. The setup can be useful in determining the solubility of various gases in ionic liquids.
设计并构建了一种电化学装置，用于评估二氧化碳在离子液体中的溶解度。该装置能够同时测量气相和离子液相中一氧化碳的含量，这使其对于原位电化学测量非常有用。自制的玻璃池能够承受高真空，使离子液体样品在表征前能够适当抽真空，并在实验过程中保持无污染。连接到该装置的压力计能够连续监测添加到系统中的气体。这种配置可以测量离子液体中气体的溶解度，用亨利常数表示，该常数由离子液体中溶解气体浓度与顶空气体压力的生成曲线确定。它也是其他气体溶解度测量技术的一种更经济的替代方法，因为它主要由玻璃制成，且所需样品量最少。该装置可用于确定各种气体在离子液体中的溶解度。
