Abstract
Abstract The application of spray towers for CO 2 capture is a development trend in recent years. However, most of the previous jobs were conducted in a cylindrical tower by using a single spray nozzle, whose configuration and performance is not good enough for industrial application. To solve this problem, the present work proposed a diameter-varying spray tower and a new spray mode of dual-nozzle opposed impinging spray to enhance the heat and mass transfer of CO 2 absorption process. Experiments were performed to investigate the mass transfer performance (in terms of the CO 2 removal rate ( η ) and the overall mass transfer coefficient ( K G a e )) of the improved spray tower under various operating conditions. Experimental results showed that the liquid to gas ratio and mole ratio of MEA to CO 2 are major factors, which affect the absorption performance and the maximums of η and K G a e that are 94.0% and 0.574 kmol·m − 3 ·h − 1 ·kPa − 1 , respectively, under the experimental conditions. Furthermore, new correlations to predict the mass transfer coefficient of the proposed spray tower are developed in various CO 2 concentrations with a Pearson Correlation Coefficient over 90%.
Published Version
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