Effects Of Fine Particle On The Gas-liquid Mass Transfer In The Micro-channel

Gas-liquid mass transfer enhancement by dispersed particle is an important intensification method of chemical engineering process. And micro-reactors have attracted more and more attentions for their advantages brought from size reduction and produced process intensification, intrinsic safety and ?number-up?, which lead development of reactor design toward a new horizon. This paper studies the effects in the micro-channel of solid particles on the gas-liquid flow pattern and enhancement of mass transfer, and explains the results got by Dimensionless Numbers, Polarity Materials, and Coverage.In the flow pattern experimental part, two glass micro-channels were self fabricated, whose hydrodynamic diameters were 507μm and 621μm respectively. The effects of micro-channel diameter and particle on the two-phase flow pattern of H₂O-CO₂ system were investigated. Bubbly flow, Taylor flow and Taylor-annular flow were recorded in both 507μm and 621μm micro-channels under the experimental conditions by a high-speed CCD camera. After analyzing images we concluded that diameters of micro-channels affected the flow pattern maps because of the dominance of surface tension in micro-channel, and the particle affected the flow pattern maps because of the same theory.In the mass transfer experimental part, the micro-channel whose hydrodynamic diameter was 507μm was used. The mass transfer ratio under different conditions was investigated. However, different enhancement factors of gas-liquid are obtained with different particle.