Method for producing calcium carbonate from a flue gas

Abstract

A method for producing calcium carbonate from a flue gas. The method includes a carbon dioxide capturing process and a calcium carbonate forming process. The carbon dioxide capturing process is implemented by feeding an input flue gas into an alkaline aqueous solution to form a first solution. Based on a volume of the input flue gas being 100%, the input flue gas includes 10% to 80% of carbon dioxide, 6.1% to 88% of nitrogen, and 0.7% to 13.9% of oxygen. The first solution includes carbonate, and the carbonate is at least one of sodium carbonate and sodium bicarbonate. The calcium carbonate forming process is implemented by adding calcium hydroxide powders into the first solution to form a second solution, and the second solution includes calcium carbonate powders formed by the reaction between the carbonate and the calcium hydroxide powders.

Dependencies are inferred from the claim text.