Nasiri-ghiri et al. (2025): Surrogate-assisted cyclic performance optimisation of direct air capture using amine-functionalised metal–organic frameworks
Maryam Nasiri-ghiri, Hamid Reza Nasriani, Leila Khajenoori, Samira Khani Rasmussen, Karl Williams, IN: Separation and Purification Technology, https://doi.org/10.1016/j.seppur.2025.136177
Direct Air Capture (DAC) using solid sorbents has emerged as a promising technology for achieving net-negative CO₂ emissions and meeting global climate targets. Among the available sorbent materials, amine-functionalised metal–organic frameworks (MOFs) have gained significant attention due to their tuneable structures and strong affinity for CO₂ under ambient conditions. In particular, mmen-Mg₂(dobpdc) has demonstrated exceptional CO₂ uptake capacity, making it a strong candidate for DAC applications. However, its process-level performance optimisation under realistic operating conditions remains insufficiently explored. This study introduces the first comprehensive multi-objective optimisation of a temperature–vacuum swing adsorption (TVSA) process employing the amine-functionalised metal–organic framework mmen-Mg₂(dobpdc) as the sorbent for direct air capture (DAC) of CO₂.