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离子液体在气-液反应与分离过程中有良好的应用前景,研究气体/离子液体两相体系的微分散过程对于发展新型气-液分散技术和设备具有重要意义。研究了N2/[Bmim]BF4体系在同轴环管微通道中的流动和分散行为。实验结果表明,在不同的气相和液相流速下,N2/[Bmim]BF4体系分别呈现气泡流、气泡-气柱过渡流、气柱流和气柱-环隙流过渡流4种流型。通过考察分散相尖端尺寸和气相、液相流速对气-液体系流型的影响,作出了相应的流型图。通过考察气相、液相流速对稳定气-液分散流型下的气相分散尺寸的影响,揭示了分散气相行为的机理,并建立了描述气相分散尺寸的数学模型。
Ionic liquids have good application prospects in the gas-liquid reaction and separation process. It is of great significance to study the micro-dispersion of gas / ionic liquid two-phase system for the development of new gas-liquid dispersion technology and equipment. The flow and dispersion behavior of N2 / [Bmim] BF4 in microchannels of coaxial tubes were investigated. The experimental results show that the N2 / [Bmim] BF4 systems show four types of flow patterns: bubble flow, bubble-air column transition flow, gas column flow and column-annular flow respectively at different gas and liquid velocities. By investigating the influence of disperse phase tip size, gas phase and liquid velocity on the gas-liquid flow pattern, a corresponding flow pattern was obtained. By investigating the influence of gas phase and liquid velocity on gas dispersion size under stable gas-liquid dispersion flow pattern, the mechanism of gas dispersion behavior was revealed and a mathematical model describing gas dispersion size was established.