Estudo da transferência de massa entre água destilada e dióxido de carbono em um sistema de micro canais

Abstract

The study of the of mass transfer phenomena between phases carried out in microchannels has been developed seeking to intensify the processes. Increased contact between the phases promotes higher mass transfer coefficients. In this work, the promoted gas-liquid contact was between distilled water and carbon dioxide and had as main characteristic the stratified and corrugated parallel flow. In this study, the Reynolds numbers, which corresponded to the interval of 212-563, were quantified by varying the gas surface velocity in the range of 0.46-1.84 m/s and the liquid surface velocity in the range of 0.034-0.071 m/s. The mass transfer quantification was also performed by calculating the volumetric mass transfer coefficient for different operating conditions. The results allowed to analyze the effects of temperature and flow characteristics between the liquid and gaseous phases on the mass transfer efficiency in microchannels. Furthermore, the volumetric mass transfer coefficients were calculated, reaching values up to 3.80 s-1. This value shows that the mass transfer equipment used has higher efficiency than conventional mass transfer equipment used in industry, such as packed columns and static mixers.