CO₂ Capture from Air Using Amine-Functionalized Kaolin-Based Zeolites
Several inexpensive zeolites such as ZSM-5 (MFI), zeolite Y (FAU), and SAPO-34 (CHA) were developed from kaolin clay and applied for CO₂ capture from air. These molecular sieves were functionalized with tetraethylenepentamine (TEPA) in order to further improve their CO₂ capacity. The obtained kaolin-based zeolites exhibited similar properties than those of zeolites prepared with other sources. They also revealed a bimodal pore network consisting of both micropores and mesopores. The effect of amine loading on CO₂ capture was investigated and the results demonstrated that TEPA-modified zeolite Y with 10 wt % TEPA had a higher capacity than other zeolites due to its larger mesopore volume. The presence of mesopores in the zeolite Y framework facilitated a better accessibility of CO₂ molecules to the amine sites.
H. V. Thakkar et al., "CO₂ Capture from Air Using Amine-Functionalized Kaolin-Based Zeolites," Chemical Engineering & Technology, vol. 40, no. 11, pp. 1999-2007, Wiley-VCH, Nov 2017.
The definitive version is available at https://doi.org/10.1002/ceat.201700188
Chemical and Biochemical Engineering
Keywords and Phrases
Carbon Dioxide; Clay; Kaolin; Molecular Sieves; CO2 Capture; Functionalized; Kaolin Clay; Mesopore Volume; Micropores; Modified Zeolite; Pore Networks; Tetraethylenepentamine; Zeolites; Kaolin-Based Zeolites; Tetraethylenepentamine Impregnation
International Standard Serial Number (ISSN)
Article - Journal
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01 Nov 2017