Integrated electrocoagulation desalination process with carbon dioxide capture and solid recovery

Abstract

An electrocoagulation (EC) reactor and method for simultaneous COcapture and brine desalination. The EC reactor includes a reaction chamber that holds brine solution with contaminants, an inlet tube for COgas mixture supply, and a plurality of electrodes (), submerged in the brine. The electrodes are connected to a power source, applying a voltage to induce electrochemical reactions that precipitate dissolved salts and heavy metals, reducing brine salinity and contaminants, while capturing COin the form of carbonates to form solid coagulants. The method involves introducing brine into the EC reactor's reaction chamber, adding calcium oxide (CaO) and ammonium bicarbonate (NHHCO) to create a homogeneous solution, and applying electric current to dissolve the electrodes, producing solid coagulants. A COgas mixture is introduced to facilitate carbonation reactions, forming precipitates like calcium carbonate (CaCO) and magnesium carbonate (MgCO), which are filtered to obtain desalinated brine.