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ChemSusChem ; 11(11): 1756-1760, 2018 Jun 11.
Artigo em Inglês | MEDLINE | ID: mdl-29673091

RESUMO

Dehumidification in CO2 adsorptive separation processes is an important issue, owing to its high energy consumption. However, available adsorbents such as low-silica zeolites show a significant decrease in CO2 adsorption capacity when water vapor is present. A core-shell-structured MFI-type zeolite with a hydrophilic ZSM-5 coated with a hydrophobic silicalite-1 shell layer was applied in CO2 adsorptive separation under wet conditions. This hybrid material demonstrated remarkably high water tolerance with stable CO2 adsorption performance without additional thermal treatment for regeneration, whereas a significant decrease in the CO2 adsorption amount because of water vapor was observed on the parent ZSM-5. The core-shell structure of zeolites with high pore volumes, such as LTA or CHA, could also be suitable candidates for high CO2 adsorption capacity and high water tolerance for practical applications.

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