Patent ID: 7790012
Filing Date: 2010-09-07
Classification: B01D,C25B,Y02P

Abstract:
1. A system comprising: an anode electrolyte in contact with an anode; a cathode electrolyte comprising in contact with a cathode, wherein the system is configured to introduce carbon dioxide into the cathode electrolyte; a third electrolyte disposed between an anion exchange membrane and a cation exchange membrane such that the anion exchange membrane contacts the anode electrolyte and the cation exchange membrane contacts the cathode electrolyte, a gas delivery system configured to deliver hydrogen gas to the anode, wherein the system is configured to produce hydrogen gas at the cathode and absorb hydrogen gas and produce protons at the anode, without producing a gas at the anode, on applying a voltage across the anode and cathode; and wherein the system is further configured to add magnesium and calcium to the cathode electrolyte to precipitate magnesium and calcium carbonates, bicarbonates or hydroxides from the cathode electrolyte.