Process intensification of <scp> CO ₂ </scp> chemical absorption in a conjugated double‐helix cross minichannel absorber

Abstract This paper presents a novel design of miniaturized absorber for carbon capture, featuring a conjugated double‐helix cross (Codohec) multi‐minichannel structure. A lab‐scale Codohec module with four minichannels was fabricated, and chemical absorption experiments were conducted using monoethanolamine (MEA) aqueous solution under varied gas and liquid flowrates and MEA concentration conditions. Flow visualization revealed that the unique Codohec design induces diverse bubble morphologies (e.g., swirling, splitting, switching, collision, and recombination), significantly enhancing the two‐phase mass transfer. Results also demonstrated that the Codohec module achieves a processing capacity of up to kg s −1 while maintaining a high overall mass transfer coefficient of 2.75 s −1 , and with an energy consumption below 4.24 W kg −1 . These findings highlight the potential of miniaturized devices for efficient carbon capture with enhanced mass transfer, high throughput and energy efficiency, offering a promising solution for large‐scale industrial applications.