In this section
@article{Ward:2024:10.1007/s10450-024-00526-y,
author = {Ward, A and Papathanasiou, M and Pini, R},
doi = {10.1007/s10450-024-00526-y},
journal = {Adsorption},
pages = {1829--1848},
title = {The impact of design and operational parameters on the optimal performance of direct air capture units using solid sorbents},
url = {http://dx.doi.org/10.1007/s10450-024-00526-y},
volume = {30},
year = {2024}
}
TY - JOUR
AB - Direct capture of CO2 from ambient air is technically feasible today, with com mercial units already in operation. A demonstrated technology for achievingdirect air capture (DAC) is chemical separation of CO2 in a steam-assistedtemperature-vacuum swing adsorption (S-TVSA) process. However, the poten tial to develop scalable solutions remains high, requiring a detailed understandingof the impact of both process design and operation on the performance of theDAC unit. Here, we address this knowledge gap by presenting a state-of-the-artprocess simulation tool for the purification of CO2 from ambient air by a 5-stepS-TVSA process. By considering the benchmark adsorbent APDES-NFC, we con duct multi-objective productivity/energy usage optimization of the DAC unit,subject to the requirement of producing a high purity CO2 product (≥95%).For the base case scenario, we find a maximum productivity of Prmax = 6.20kg/m3/day and a minimum specific equivalent work of WEQ,min = 1.66 MJ/kg.While in reasonable agreement with published data, our results indicate thatthe description of both competitive adsorption and adsorption kinetics are keyfactors in introducing uncertainty in process model predictions. We also demon strate that the application of formal optimization techniques, rather than designheuristics, is central to reliably assess the process performance limits. We identitythat system designs employing moderate CO2 sorption kinetics and contactorswith low length-to-radius ratios yield the best performance in terms of systemproductivity. Finally, we find that moderate-high ambient relative humidities (50-75%) offer significantly favourable performance, and that a wide range of feed temperatures (5-30oC) can be accommodated via process optimization withouta significant impact on performance.
AU - Ward,A
AU - Papathanasiou,M
AU - Pini,R
DO - 10.1007/s10450-024-00526-y
EP - 1848
PY - 2024///
SN - 0929-5607
SP - 1829
TI - The impact of design and operational parameters on the optimal performance of direct air capture units using solid sorbents
T2 - Adsorption
UR - http://dx.doi.org/10.1007/s10450-024-00526-y
UR - https://link.springer.com/article/10.1007/s10450-024-00526-y
VL - 30
ER -