CO₂ Capture from Air Using Amine-Functionalized Kaolin-Based Zeolites

Abstract

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.

Department(s)

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)

0930-7516; 1521-4125

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2017 Wiley-VCH, All rights reserved.

Publication Date

01 Nov 2017

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