Both chemical (by adding 0.05 M NaOH) and physical absorption of CO₂ into aqueous glycerol solutions with viscosity up to 45.6 mPa·s in a microchannel are investigated. The concentration distribution pattern, absorption time, and mass transfer coefficient are analyzed and discussed. A new concentration distribution pattern is observed with the lowest concentration locating at the channel center. It is shown for the first time that presents a positive relationship with liquid viscosity, which is explained by the essential role of the mass exchange between the liquid film and bulk liquid slug. This mass exchange may lead to a rise in k _L when increasing the liquid viscosity under some cases in chemical absorption. A mass transfer model is successfully applied to predict the bubble size evolution in physical absorption. The model also shows about 10–46% of the mass transfer contribution from liquid films before saturation.

中文翻译：

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矩形微通道中气液塞团流动中液体粘度的影响和传质模型

研究了在微通道中化学性（通过添加0.05 M NaOH）和CO ₂在甘油水溶液中的物理吸收，粘度高达45.6 mPa·s。分析和讨论了浓度分布图，吸收时间和传质系数。观察到一个新的浓度分布模式，最低浓度位于通道中心。首次表明它与液体粘度呈正相关，这可以通过液膜和散装液体块之间的质量交换的重要作用来解释。这种质量交换可能导致k _L升高 当增加液体粘度时，在某些情况下会被化学吸收。传质模型已成功应用于预测物理吸收中气泡尺寸的演变。该模型还显示了饱和前液膜传质贡献的10-46％。