Adsorption

, Volume 14, Issue 6, pp 755–762

Amine functionalised metal organic frameworks (MOFs) as adsorbents for carbon dioxide

Authors

  • Bjørnar Arstad
    • SINTEF Materials and Chemistry
  • Helmer Fjellvåg
    • Centre for Materials Science and Nanotechnology and Department of ChemistryUniversity of Oslo
  • Kjell Ove Kongshaug
    • Centre for Materials Science and Nanotechnology and Department of ChemistryUniversity of Oslo
  • Ole Swang
    • SINTEF Materials and Chemistry
    • SINTEF Materials and Chemistry
Article

DOI: 10.1007/s10450-008-9137-6

Cite this article as:
Arstad, B., Fjellvåg, H., Kongshaug, K.O. et al. Adsorption (2008) 14: 755. doi:10.1007/s10450-008-9137-6

Abstract

Three different porous metal organic framework (MOF) materials have been prepared with and without uncoordinated amine functionalities inside the pores. The materials have been characterized and tested as adsorbents for carbon dioxide. At 298 K the materials adsorb significant amount of carbon dioxide, the amine functionalised adsorbents having the highest CO2 adsorption capacities, the best adsorbing around 14 wt% CO2 at 1.0 atm CO2 pressure. At 25 atm CO2 pressure, up to 60 wt% CO2 can be adsorbed. At high pressures the CO2 uptake is mostly dependent on the available surface area and pore volume of the material in question. For one of the iso-structural MOF pairs the introduction of amine functionality increases the differential adsorption enthalpy (from isosteric method) from 30 to around 50 kJ/mole at low CO2 pressures, while the adsorption enthalpies reach the same level at increase pressures. The high pressure experimental results indicate that MOF based solid adsorbents can have a potential for use in pressure swing adsorption of carbon dioxide at elevated pressures.

Keywords

Metal organic frameworks Amine functionality Carbon dioxide Adsorption

Copyright information

© Springer Science+Business Media, LLC 2008