Pulse-response study for the humidity effect on sorption of ethyl bromide on clays

Date

1999-02-01

Author

Yasyerli, N
Dogu, G
Doğu, Timur
McCoy, BJ

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The effects of relative humidify on sorption and the diffusion of ethyl bromide in kaolinite and montmorillonite pellets were investigated by the one-sided single-pellet moment technique. Montmorillonite demonstrated a higher water affinity than kaolinite, causing a sharper decrease of the ethyl bromide adsorption equilibrium constant with an increase of relative humidity. For montmorillonite, most of the active sites are covered by water even at relative humidities of 8%, and adsorption of ethyl bromide on the gas - water interface controls the sorption process. For kaolinite, however; adsorption on gas-to-mineral, gas-to-water and water-to-mineral surfaces contributes to the sorption process. Effective macropore diffusivity of ethyl bromide in montmorillonite showed a decreasing trend with increase in relative humidity. This is due to high water uptake of montmorillonite and the corresponding change in pore structure. No such change was observed for kaolinite.

Subject Keywords

Biotechnology, Environmental Engineering, General Chemical Engineering

URI

https://hdl.handle.net/11511/62895

Journal

AICHE JOURNAL

DOI

https://doi.org/10.1002/aic.690450210

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

N. Yasyerli, G. Dogu, T. Doğu, and B. McCoy, “Pulse-response study for the humidity effect on sorption of ethyl bromide on clays,” AICHE JOURNAL, pp. 291–298, 1999, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/62895.