The gas-liquid two-phase flow and the mass transfer characteristics for CO₂ absorption into the binary amine mixture of monoethanolamine (MEA) and N,N-diethylethanolamine (DEEA) aqueous solution were investigated in T-junction microchannel reactor with a square cross-section. The effects of gas-liquid flow rate and absorbent concentration on bubble length, velocity and mass transfer coefficient were studied. Three flow regimes including slug-bubbly flow, slug flow and slug-annular flow were observed under experimental condition, and the gas-liquid two-phase flow pattern map was depicted. It is found that the transitions between three flow regimes depend primarily on the competition of forces exerted on bubble in the T-junction. The kinetics of CO₂ absorption into blended amine aqueous solutions was analyzed to understand the mass transfer enhancement mechanism of new hybrid solvent. Furthermore, the liquid-side overall mass transfer coefficient k_L and the liquid-side overall volumetric mass transfer coefficient k_La were determined through processing experimental images recorded by a high-speed camera. The results show that k_La is in the range of (3.04-20.07) s^-1 in this work, which is 2-3 orders of magnitude higher than that in the conventional equipment. The dimensionless Damköhler number (Da) and Peclet number (Pe) are introduced to correlate the liquid-side volumetric mass transfer coefficient, new correlation shows good prediction accuracy with the average deviation 3.64%.

在T形结微通道反应器中研究了气液两相流和CO ₂吸收到单乙醇胺（MEA）和N，N-二乙基乙醇胺（DEEA）水溶液的二元胺混合物中的传质特性-部分。研究了气液流速和吸收剂浓度对气泡长度，速度和传质系数的影响。在实验条件下，观察了团状气泡流，团状流和团状环流三种流动状态，并绘制了气液两相流型图。发现三种流动状态之间的过渡主要取决于施加在T型接头上气泡上的力的竞争。CO ₂动力学分析了胺在混合胺水溶液中的吸收，以了解新型杂化溶剂的传质增强机理。此外，通过处理由高速照相机记录的实验图像来确定液体侧总质量传递系数k _L和液体侧总体积质量传递系数k _L a。结果表明，在该工作中，k _L a在（3.04-20.07）s ^-1的范围内，比传统设备高2-3个数量级。无量纲的Damköhler数（Da）和Peclet数（Pe引入来关联液体侧体积传质系数，新的关联显示出良好的预测准确性，平均偏差为3.64％。