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@article{Ward:2023:10.1016/j.seppur.2023.123990,
author = {Ward, A and Li, K and Pini, R},
doi = {10.1016/j.seppur.2023.123990},
journal = {Separation and Purification Technology},
title = {Assessment of dual-adsorbent beds for CO2 capture byequilibrium-based process design},
url = {http://dx.doi.org/10.1016/j.seppur.2023.123990},
volume = {319},
year = {2023}
}
TY - JOUR
AB - We have carried out a model-based assessment of dual-adsorbent beds for post-combustion CO capture, whereby we consider systems in which two distinct adsorbent materials are homogeneously mixed to form a fixed bed adsorber. We have employed an equilibrium-based process model (D-BAAM) to simulate and optimize the process performance of a four-step vacuum swing adsorption cycle for CO capture with a dual-adsorbent bed. We have used the developed framework to screen the performance of 2,850 binary combinations of adsorbents from a database of 76 promising materials for post-combustion capture, which includes zeolites, activated carbons, metal organic frameworks (MOFs) and zeolitic imidazolate frameworks (ZIFs). Through unconstrained purity/recovery process optimization, we determine that only one pure material in a material pair needs to itself satisfy regulatory constraints on CO purity/recovery for post-combustion capture to yield a dual-adsorbent process which satisfies the constraints. For these dual-adsorbent combinations, we have assessed the optimal process performance in the constrained working capacity/energy usage Pareto plane and have identified nine distinct categories of process behavior. Five of these categories have the potential to allow for a reduction in the energy penalty of the separation, as compared to the constituent single-adsorbent processes. We have observed reductions in the energy penalty of the separation of approximately 20%. We contend that such processes may be economically optimal depending on a process specific balance of capital, operating and material costs, and should be investigated in more detail using dynamic process modeling and an associated techno-economic assessment.
AU - Ward,A
AU - Li,K
AU - Pini,R
DO - 10.1016/j.seppur.2023.123990
PY - 2023///
SN - 0950-4214
TI - Assessment of dual-adsorbent beds for CO2 capture byequilibrium-based process design
T2 - Separation and Purification Technology
UR - http://dx.doi.org/10.1016/j.seppur.2023.123990
VL - 319
ER -