Abstract
The liquid-liquid phase equilibrium of the binary systems, 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]) and 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF4]) + methylbenzene, were investigated at temperatures ranging from 294 K to 355 K. The solubility of methylbenzene was greater in [Bmim][PF6] than in [Bmim][BF4]. The effects of multiple parameters, such as temperature, gas flow rate and concentration of methylbenzene, were systematically investigated. The removal of methylbenzene in [Bmim][PF6] is up to 83% at 293.15 K, a gas flow rate of 50 mL/min and a gas concentration of 395 mg/m3. The absorption and desorption of methylbenzene in [Bmim][PF6] were reversible.
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