CO₂ absorption into [Bmim][BF₄] aqueous solution was investigated experimentally. To enhance gas-liquid mass transfer, the heart-shaped grooves were engraved in the microchannel. It was found that the grooves could cause eddy flow of liquid phase and accordingly promote turbulent and convective mass transfer. Liquid side volumetric mass transfer coefficient and mass transfer enhancement factor could be remarkably increased, and the enhancement factor could reach up to 2.2. Moreover, the effective mass transfer enhancement efficiency was analyzed considering the energy consumption, and its value could reach 2.1. A correlation was proposed to predict the liquid side volumetric mass transfer coefficient for the grooved microchannel.

CO ₂吸收到[Bmim][BF ₄ ] 水溶液中进行了实验研究。为了增强气液传质，在微通道中刻有心形凹槽。发现凹槽会引起液相的涡流，从而促进湍流和对流传质。液侧体积传质系数和传质增强因子显着提高，增强因子可达2.2。此外，考虑能耗对有效传质强化效率进行了分析，其值可达2.1。提出了相关性来预测带槽微通道的液体侧体积传质系数。