Fouling management in oceanic carbon capture via in-situ electrochemical bipolar membrane electrodialysis

Direct ocean capture: the emergence of electrochemical processes for oceanic carbon removal

“…The researchers observed that by lowering the current density, the local pH decreased resulting in an increase in performance. Similar observations were also made by Sharifian et al 127,144 on membranes. At higher current densities, scaling has been observed to accelerate due to the high local OH − concentration generated.…”

“…As such, the same research group recently explored fouling management strategies that can be applied to address this issue. 144 The study investigated different strategies to minimize fouling in BPMED systems employed to mineralize DIC in seawater. These measures involved testing different membrane configurations and exploring fouling removal methods.…”

“…According to more recent research, a highly effective way to minimize fouling in BPMED systems is to avoid the use of CEMs near high-pH channels. 144 This is because CEMs create local high concentrations of Ca 2+ and Mg 2+ on the surface which promote fouling. One other potential concern is biological fouling in membrane-utilizing systems.…”

Advancements in Bipolar Membrane Electrodialysis Techniques for Carbon Capture

“…Fouling is a significant challenge encountered in the process of capturing CO 2 from seawater using BMED. In the study by Sharifian et al, the focus was on managing fouling in BMED for oceanic carbon capture . Fouling management strategies were investigated, including membrane configuration and current–flow rate optimization, as well as fouling removal methods.…”

Unraveling the Potential of Electrochemical pH-Swing Processes for Carbon Dioxide Capture and Utilization

“…Approaches such as air and CO 2 gas sparging, dissolved CO 2(aq) cleaning, backpressure, flow rate adjustment, and acid-washing have been introduced to address these issues, with a combination of acid-washing and back pressure proving to be effective in eliminating inorganic fouling. A study conducted by Sharifian et al 77 indicated that a combination of acid-wash and back pressure was effective in eliminating inorganic fouling, restoring both the cell voltage and pressure drop to their initial values.…”