Degradation of amine-supported CO2 adsorbents in the presence of oxygen-containing gases

Aliakbar Heydari-Gorji; Youssef Belmabkhout; Abdelhamid Sayari

doi:10.1016/j.micromeso.2011.05.010

Degradation of amine-supported CO₂ adsorbents in the presence of oxygen-containing gases

Aliakbar Heydari-Gorji, Youssef Belmabkhout, Abdelhamid Sayari^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

115 Scopus citations

Abstract

Three samples containing grafted primary, secondary and tertiary monoamines (pMono, sMono and tMono) as well as a triamine-grafted material (TRI) with both primary and secondary amines were exposed to flowing air at 120 °C for 30-40 h. It was found that pMono and tMono were stable as evidenced by CO ₂ adsorption measurements as well as infrared and NMR data, whereas sMono and TRI adsorbents exhibited extensive deactivation. Infrared data showed the development of an absorption band at 1665-1680 cm^-1 whose intensity increased with the degree of oxidative degradation. However, only minor changes occurred in the corresponding ¹³C CP/MAS NMR spectra. The findings were discussed, and a tentative explanation was provided.

Original language	English (US)
Pages (from-to)	146-149
Number of pages	4
Journal	Microporous and Mesoporous Materials
Volume	145
Issue number	1-3
DOIs	https://doi.org/10.1016/j.micromeso.2011.05.010
State	Published - Nov 2011

Keywords

Amine-functionalized silicas
CO adsorption
Oxidative degradation
Stability

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics
Mechanics of Materials

Access to Document

10.1016/j.micromeso.2011.05.010

Cite this

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title = "Degradation of amine-supported CO2 adsorbents in the presence of oxygen-containing gases",

abstract = "Three samples containing grafted primary, secondary and tertiary monoamines (pMono, sMono and tMono) as well as a triamine-grafted material (TRI) with both primary and secondary amines were exposed to flowing air at 120 °C for 30-40 h. It was found that pMono and tMono were stable as evidenced by CO 2 adsorption measurements as well as infrared and NMR data, whereas sMono and TRI adsorbents exhibited extensive deactivation. Infrared data showed the development of an absorption band at 1665-1680 cm-1 whose intensity increased with the degree of oxidative degradation. However, only minor changes occurred in the corresponding 13C CP/MAS NMR spectra. The findings were discussed, and a tentative explanation was provided.",

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AU - Heydari-Gorji, Aliakbar

AU - Belmabkhout, Youssef

AU - Sayari, Abdelhamid

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AB - Three samples containing grafted primary, secondary and tertiary monoamines (pMono, sMono and tMono) as well as a triamine-grafted material (TRI) with both primary and secondary amines were exposed to flowing air at 120 °C for 30-40 h. It was found that pMono and tMono were stable as evidenced by CO 2 adsorption measurements as well as infrared and NMR data, whereas sMono and TRI adsorbents exhibited extensive deactivation. Infrared data showed the development of an absorption band at 1665-1680 cm-1 whose intensity increased with the degree of oxidative degradation. However, only minor changes occurred in the corresponding 13C CP/MAS NMR spectra. The findings were discussed, and a tentative explanation was provided.

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