Effect of electrolytes on CO-water mass transfer

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Date
2009-01-01
Authors
Zhu, Haiyang
Shanks, Brent
Heindel, Theodore
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Abstract

The influence of various electrolytes such as sulfate, nitrate, and chloride on CO-water mass transfer was investigated in this study. The results indicate that the enhancement in the CO-water volumetric masstransfer coefficient ranged from 1.5 to 4.7 times that of a baseline system without electrolytes, depending on electrolyte type and concentration. For those electrolytes with the same anions, copper-containing electrolytes provided stronger enhancement, whereas for those electrolytes with the same cations, sulfate-containing electrolytes showed stronger enhancement. By measuring both the CO-water volumetric mass-transfer coefficient (kLa) and the mass-transfer coefficient (kL), it was found that the electrolytes inhibit gas bubble coalescence. This leads to an increase in the gas-liquid interfacial area, resulting in CO-water mass-transfer enhancement. In contrast, when MCM41 nanoparticles with or without functionalized mercaptopropyl groups were added to water, the mass-transfer coefficient and CO-water interfacial area were both increased.

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Reprinted (adapted) with permission from Industrial and Engineering Chemistry Research 48 (2009): 3206, doi: 10.1021/ie8012924. Copyright 2009 American Chemical Society.

Keywords
Mechanical Engineering, baseline systems, functionalized, gas bubbles, gas liquids, interfacial areas, mass-transfer coeficients, water mass, chlorine compounds, coalescence, mass transfer
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