Skip to content

Research at St Andrews

Understanding CO2 adsorption in a flexible zeolite through a combination of structural, kinetic and modelling techniques

Research output: Contribution to journalArticle


Maarten C. Verbraeken, Roberto Mennitto, Veselina M. Georgieva, Elliott L. Bruce, Alex G. Greenaway, Paul A. Cox, Jung Gi Min, Suk Bong Hong, Paul A. Wright, Stefano Brandani

School/Research organisations


In this study we show how non-trivial equilibrium and kinetic adsorption behaviour in a flexible zeolite can be understood through a combination of experimental characterisation and modelling. Flexible zeolites, such as those in the RHO-family, can exhibit unusual stepped isotherms in the presence of CO2, but their structural complexity makes it hard to attribute a clear mechanism. Here we present a structural and kinetic study on (Na,TEA)-ZSM-25, an extended member of the RHO-family, and show that by combining diffraction data, lattice fluid modelling and dynamic column experiments, we obtain a plausible mechanism for CO2 adsorption and transport in this material. It is evident that by using any single technique, the behaviour is too complex to be readily understood. This is to our knowledge the first study to measure and model the changing kinetics due to adsorption induced framework flexibility.


Original languageEnglish
Article number117846
Number of pages14
JournalSeparation and Purification Technology
Early online date7 Oct 2020
Publication statusE-pub ahead of print - 7 Oct 2020

    Research areas

  • ZSM-25, Adsorption, Synchrotron X-ray diffraction, Zero Length Column technique, Lattice Fluid

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Effects of crystal size on methanol to hydrocarbon conversion over single crystals of ZSM-5 studied by synchrotron infrared microspectroscopy

    Minova, I. B., Matam, S. K., Greenaway, A., Catlow, C. R. A., Frogley, M. D., Cinque, G., Wright, P. A. & Howe, R. F., 14 Sep 2020, In : Physical chemistry chemical physics : PCCP. 22, 34, p. 18849-18859 11 p.

    Research output: Contribution to journalArticle

  2. Site-specific iron substitution in STA-28, a large pore aluminophosphate zeotype prepared using 1,10-phenanthrolines as framework-bound templates

    Watts, A. E., Lozinska, M. M., Slawin, A. M. Z., Mayoral, A., Dawson, D. M., Ashbrook, S. E., Bode, B. E., Dugulan, I., Shannon, M., Cox, P., Turrina, A. & Wright, P. A., 17 Aug 2020, In : Angewandte Chemie International Edition. 59, 35, p. 15186-15190 5 p.

    Research output: Contribution to journalArticle

  3. Hiding extra-framework cations in zeolites L and Y by internal ion exchange and its effect on CO2 adsorption

    Lozinska, M. M., Miller, D. N., Brandani, S. & Wright, P. A., 23 Jan 2020, In : Journal of Materials Chemistry A. Advance Article

    Research output: Contribution to journalArticle

  4. Facile, room-temperature 17O enrichment of zeolite frameworks revealed by solid-state NMR spectroscopy

    Pugh, S. M., Wright, P. A., Law, D., Thompson, N. & Ashbrook, S. E., 15 Jan 2020, In : Journal of the American Chemical Society. 142, 2, p. 900-906 7 p.

    Research output: Contribution to journalArticle

  5. Improvements to the production of ZIF-94; a case study in MOF scale-up

    Johnson, T., Łozińska, M. M., Orsi, A. F., Wright, P. A., Hindocha, S. & Poulston, S., 21 Oct 2019, In : Green Chemistry. 21, 20, p. 5665-5670 6 p.

    Research output: Contribution to journalArticle

Related by journal

  1. Surface trace doping of Na enhancing structure stability and adsorption properties of Li1.6Mn1.6O4 for Li+ recovery

    Qian, F., Zhao, B., Guo, M., Wu, Z., Zhou, W. & Liu, Z., 13 Aug 2020, In : Separation and Purification Technology. In press

    Research output: Contribution to journalArticle

  2. Pilot scale recovery of lignin from black liquor and advanced characterization of the final product

    Lauwaert, J., Stals, I., Lancefield, C. S., Deschaumes, W., Depuydt, D., Vanlerberghe, B., Devlamynck, T., Bruijnincx, P. C. A. & Verberckmoes, A., 15 Aug 2019, In : Separation and Purification Technology. 221, p. 226-235 10 p.

    Research output: Contribution to journalArticle

ID: 270618824