Experimental investigation on gas-liquid mass transfer with fast chemical reaction in microchannel

The gas-liquid two-phase flow and mass transfer with fast chemical reaction in a microchannel were investigated experimentally. Result showed that the bubble volume decreased exponentially with its movement along the channel in a quickly reactable absorbent. The volumetric mass transfer coefficient k L a increased with gas flow rate, while it was insensitive to liquid flow rate under experimental conditions, although the mass transfer coefficient k L increased with liquid flow rate. In slug-bubbly flow regime, the k L decreased when increasing gas flow rate, but inverse tendency was found for slug flow pattern. Both k L and k L a increased with the increase of absorbent concentration. A new correlation for predicting the volumetric mass transfer coefficients k L a was proposed by taking the enhancement factor E of chemical reaction into account.