BibTex format
@article{Büchner:2026,
author = {Büchner, D and Pini, R},
journal = {Langmuir},
title = {Unary and binary dynamic column breakthrough experiments with carbon dioxide and nitrogen imaged by x-ray computed tomography},
year = {2026}
}
RIS format (EndNote, RefMan)
TY - JOUR
AB - This study extends the Digital Adsorption (DA) method– i.e., adsorption experiments augmented with X-ray computed tomography (XCT)– from unary systems withstrongly adsorbing CO2 to unary systems with weakly adsorbing N2 and to binary systems involving both species. Using this method, equilibrium adsorption isotherms on commercial activated carbon and zeolite 13X were measured for both gases at 294.15Kbetween 0.1 bar and 9 bar. Our analysis shows that X-ray attenuation by the bulk phase must be considered for weak adsorbates, while it is relevant only at elevated pressures for strong adsorbates. Unary dynamic column breakthrough (DCB) experiments with N2 showed that, with a correction factor, the DA method can describe the transient progression of the internal adsorbed phase under near-isothermal, equilibrium controlled conditions quantitatively. In binary CO2–N2 DCB experiments, the direct determination of adsorbed amounts requires local composition data; however, when complemented by a one-dimensional DCB model, the experimental results are shown to capture dynamic adsorption behavior, including fast N2 and slower CO2 uptake, as well as a thermally enhanced roll-up. These results demonstrate that XCT provides valuable insight into dynamic adsorption processes and that, with care, the DA methodcan also be applied to weakly adsorbing systems.
AU - Büchner,D
AU - Pini,R
PY - 2026///
SN - 0743-7463
TI - Unary and binary dynamic column breakthrough experiments with carbon dioxide and nitrogen imaged by x-ray computed tomography
T2 - Langmuir
ER -