Molecular Layer Deposition-Modified 5A Zeolite for Highly Efficient Co₂ Capture
Effective pore mouth size of 5A zeolite was engineered by depositing an ultrathin layer of microporous TiO2 on its external surface and appropriate pore misalignment at the interface. As a result, a slightly bigger N2 molecule (kinetic diameter: 0.364 nm) was effectively excluded, whereas CO2 (kinetic diameter: 0.33 nm) adsorption was only influenced slightly. The prepared composite zeolite sorbents showed an ideal CO2/N2 adsorption selectivity as high as ∼70, a 4-fold increase over uncoated zeolite sorbents, while maintaining a high CO2 adsorption capacity (1.62 mmol/g at 0.5 bar and 25 °C) and a fast CO2 adsorption rate.
Z. Song et al., "Molecular Layer Deposition-Modified 5A Zeolite for Highly Efficient Co₂ Capture," ACS Applied Materials and Interfaces, vol. 10, no. 1, pp. 769-775, American Chemical Society (ACS), Jan 2018.
The definitive version is available at https://doi.org/10.1021/acsami.7b16574
Chemical and Biochemical Engineering
Keywords and Phrases
Adsorption; Alignment; Atomic Layer Deposition; Carbon Dioxide; Deposition; Self Assembly; Titanium Dioxide; Zeolites; Adsorption Selectivity; CO2 Adsorption; CO2 Capture; Molecular Layer Deposition; Pore Misalignment; Titanium Compounds; CO2 Adsorption Rate; CO2/N2 Adsorption Selectivity
International Standard Serial Number (ISSN)
Article - Journal
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01 Jan 2018