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 journalArticlepeer-review

70 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 languageEnglish (US)
Pages (from-to)146-149
Number of pages4
JournalMicroporous and Mesoporous Materials
Volume145
Issue number1-3
DOIs
StatePublished - Nov 1 2011

Keywords

  • Amine-functionalized silicas
  • CO adsorption
  • Oxidative degradation
  • Stability

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials

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