Adsorption of CO2-containing gas mixtures over amine-bearing pore-expanded MCM-41 silica: Application for CO2 separation

Youssef Belmabkhout, Rodrigo Serna-Guerrero, Abdelhamid Sayari*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

52 Scopus citations


Adsorption of CO2, N2, CH4 and H 2 on triaminegrafted pore-expanded MCM-41 mesoporous silica (TRIPE- MCM-41) was investigated at room temperature in a wide range of pressure (up to 25 bar) using gravimetric measurements. The material was found to exhibit high affinity toward CO2 in comparison to the other species over the whole range of pressure. Column-breakthrough dynamic measurements of CO 2-containing mixtures showed very high selectivity toward CO 2 over N2, CH4 and H2 at CO 2 concentrations within the range of 5 to 50%. These conditions are suitable for effective removal of CO2 at room temperature from syngas, flue gas and biogas using temperature swing (TS) or temperature-pressure swing (TPS) regeneration mode. Moreover, TRI-PE-MCM-41 was found to be highly stable over hundreds of adsorption-desorption cycles using TPS as regeneration mode.

Original languageEnglish (US)
Pages (from-to)395-401
Number of pages7
Issue number2
StatePublished - Apr 1 2011


  • Adsorption
  • CO adsorption
  • CO adsorption selectivity
  • CO removal
  • CO separation

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Surfaces and Interfaces


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