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Effect of Electrolytes on CO−Water Mass Transfer
Industrial & Engineering Chemistry Research
  • Haiyang Zhu, Iowa State University
  • Brent H. Shanks, Iowa State University
  • Theodore J. Heindel, Iowa State University
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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 mass-transfer 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.

Reprinted with permission from Industrial & Engineering Chemistry Research 48 (2009): 3206–3210, doi:10.1021/ie8012924. Copyright 2009 American Chemical Society.

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American Chemical Society
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Haiyang Zhu, Brent H. Shanks and Theodore J. Heindel. "Effect of Electrolytes on CO−Water Mass Transfer" Industrial & Engineering Chemistry Research Vol. 48 Iss. 6 (2009) p. 3206 - 3210
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