Title

Molecular Layer Deposition-Modified 5A Zeolite for Highly Efficient Co₂ Capture

Abstract

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.

Department(s)

Chemical and Biochemical Engineering

Comments

We greatly acknowledge the financial support by the National Science Foundation (NSF), United States, under grant no. CBET-1402772.

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)

1944-8244; 1944-8252

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2018 American Chemical Society (ACS), All rights reserved.

PubMed ID

29239167

Share

 
COinS