TY - JOUR
T1 - Understanding CO2 adsorption in a flexible zeolite through a combination of structural, kinetic and modelling techniques
AU - Verbraeken, Maarten C.
AU - Mennitto, Roberto
AU - Georgieva, Veselina M.
AU - Bruce, Elliott L.
AU - Greenaway, Alex G.
AU - Cox, Paul A.
AU - Min, Jung Gi
AU - Hong, Suk Bong
AU - Wright, Paul A.
AU - Brandani, Stefano
PY - 2021/2/1
Y1 - 2021/2/1
N2 - 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.
AB - 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.
UR - https://linkinghub.elsevier.com/retrieve/pii/S1383586620323194
U2 - 10.1016/j.seppur.2020.117846
DO - 10.1016/j.seppur.2020.117846
M3 - Article
SN - 1383-5866
VL - 256
JO - Separation and Purification Technology
JF - Separation and Purification Technology
M1 - 117846
ER -