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- W2022306838 abstract "Cage-type micro-porous materials such as LTA, CHA, SAPO-34, DDR, ERI, ZIF-7, and ZIF-8 have significant potential for use in membrane technologies for CO2 capture. The permeation selectivities are governed by a combination of adsorption and diffusion selectivities, each of which can be separately manipulated. In this study we have investigated the characteristics of CO2/CH4 mixture diffusion in ZIF-8 by monitoring the uptake within crystals using infra-red microscopy (IRM). The uptake profiles were fitted to determine the “effective” Fick diffusivities of the individual components in the mixture. The diffusivity measurements, conducted for a range of loadings, clearly demonstrate that the preponderance of CO2 at the window regions of ZIF-8 hinders the inter-cage transport of partner CH4 molecules. Such hindering effects serve to enhance the CO2/CH4 permeation selectivities across ZIF-8 membranes for high mixture loadings within the membrane above values anticipated on the basis of unary permeances." @default.
- W2022306838 created "2016-06-24" @default.
- W2022306838 creator A5003657069 @default.
- W2022306838 creator A5043357391 @default.
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- W2022306838 date "2012-04-01" @default.
- W2022306838 modified "2023-09-26" @default.
- W2022306838 title "Hindering effects in diffusion of CO2/CH4 mixtures in ZIF-8 crystals" @default.
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- W2022306838 doi "https://doi.org/10.1016/j.memsci.2012.01.013" @default.
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