Intrinsic CO2 capture process for the production of metal oxides, cement, CO2 air capture or a combination thereof

A process for producing captured carbon dioxide comprising:

• reacting calcium carbonate with sulfur dioxide solution to directly produce solid calcium sulfite and gaseous carbon dioxide without the prior or simultaneous production of bisulfite;
• thermally decomposing said calcium sulfite to produce gaseous sulfur dioxide;
• and
• recovering gaseous sulfur dioxide by dissolving it in a solution;
• wherein the gaseous carbon dioxide is captured and wherein the reaction of calcium carbonate with sulfur dioxide solution is conducted under conditions to prevent the formation of sulfate salts, wherein said conditions to prevent the formation of sulfate salts in the reaction of calcium carbonate with sulfur dioxide solution comprise gaseous diatomic oxygen concentration of less than 21 vol %.