Advances in hollow fiber membrane contactors for CO2 stripping

Alkanolamines are most commonly used solvents for CO2 capture because of their high absorption capacities and reversibility. The energy-intensive nature of amine-based CO2 capture, as well as high capital cost, inhibits its widespread application. Amine solvent regeneration accounts for more than 60% of the overall CO2 capturing cost. Global interest in reducing CO2 emissions efficiently shows the urgency of advancements in carbon capture. Hollow fiber membrane contactors (HFMCs) give a promising option for solvent regeneration, offering benefits like functional adaptability, versatility, and decreased energy utilization. The latest developments in the use of HFMCs for CO2 stripping in amine-based carbon capture processes are examined in this paper. The review includes an assessment of membrane materials, fabrication approaches, module developments, and innovation challenges. The challenges of scaling up membrane contactors for industrial applications are considered, emphasizing interdisciplinary collaboration, technological advancement, and environmentally friendly methods. Membrane contractors have the potential to significantly contribute to global efforts for a sustainable and environmentally conscious future as the world moves toward a low-carbon future. Further research on optimizing HFMC materials and understanding their industrial effect is essential to fully realize their potential in large-scale CO2 separation processes. © 2024 The Authors