INVESTIGATION OF CO2 AND METHANOL SOLUBILITY AT HIGH PRESSURE AND TEMPERATURE IN THE IONIC LIQUID [EMIM][BF4] EMPLOYED DURING METHANOL SYNTHESIS IN A MEMBRANE-CONTACTOR REACTOR
INVESTIGATION OF CO2 AND METHANOL SOLUBILITY AT HIGH PRESSURE AND TEMPERATURE IN THE IONIC LIQUID [EMIM][BF4] EMPLOYED DURING METHANOL SYNTHESIS IN A MEMBRANE-CONTACTOR REACTOR
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DOI：
10.1016/j.ces.2021.116722
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发表时间：
2021-04
影响因子：
4.7
通讯作者：
Fatemeh Sadat Zebarjad;Zi Wang;Hao Li;Sheng Hu;Yongchun Tang;T. Tsotsis
中科院分区：
文献类型：
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作者：
Fatemeh Sadat Zebarjad;Zi Wang;Hao Li;Sheng Hu;Yongchun Tang;T. Tsotsis
采用高压高温装置，采用压降法研究了离子液体1-乙基-3-甲基咪唑四氟硼酸盐（[EMM][BF 4]）的溶解性能。选择[EMIM][BF 4]是因为它被用作我们小组最近提出/研究的基于膜反应器（MR）的甲醇合成（MR-MeS）工艺中的扫掠液体。MR-MeS研究表明，在典型的MeS反应条件下，IL中的甲醇（MeOH）溶解度很高，这促使本研究在非反应条件下直接测量这种溶解度，以验证MR研究结果。此外，在MR-MeS研究期间，存在对[EMIM][BF 4]中CO2溶解度的担忧，因为它是一种反应物，并且其在IL中的溶解将对性能有害。因此，除了MeOH溶解度之外，还进行了研究以研究CO2。我们的研究表明，虽然CO2的溶解度在室温下是高的，他们变得可以忽略不计，在典型的MeS条件。
In this paper, the solubility properties of the ionic liquid (IL), 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM][BF4]) were studied using a high-pressure, high-temperature set-up employing the pressure-drop technique. [EMIM][BF4] was selected because it is used as sweep liquid in a membrane reactor (MR)-based methanol synthesis (MR-MeS) process recently proposed/studied by our group. The MR-MeS studies indicated high methanol (MeOH) solubilities in the IL under typical MeS reaction conditions, which then motivated this study to measure such solubilities directly under non-reactive conditions to validate the MR study findings. In addition, during the MR-MeS studies concerns existed about the CO2solubility in [EMIM][BF4], since it is a reactant and its dissolution in the IL would be detrimental for performance. Studies, therefore, were also carried out to investigate CO2, in addition to MeOH solubility. Our investigation indicates that though CO2solubilities are high at room temperature, they become negligible at the typical MeS conditions.