Inorganic fouling control and removal in oceanic carbon capture via in situ mineralization using bipolar membrane electrodialysis (BPMED)
Fouling study for an electrochemical cell used to capture CO2 from seawater in the form of CaCO3
H.C. van der Wal (TU Delft - Civil Engineering & Geosciences)
H. Spanjers (TU Delft - Sanitary Engineering)
R.E.F. Lindeboom (TU Delft - Sanitary Engineering)
DA Vermaas (TU Delft - ChemE/Transport Phenomena)
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Abstract
Oceanic CO2 capture technology can be used as a negative emission technology, or pre-treatment to reduce inorganic fouling (i.e., scaling) potential when further processing seawater. In this work CO2 from (synthetic) seawater was captured electrochemically via bipolar membrane electrodialysis. Although previous studies showed promising results regarding energy consumption (kJ/mole CaCO3), inorganic fouling is a drawback, which is why an inorganic fouling control and removal study was done. The effect of applied current density and flowrate on inorganic fouling build-up and dissolved organic carbon removal was investigated for 2 cell pair configurations. For inorganic fouling removal 5 methods were
investigated. This research was a proof of concept.