Method and device for regenerating a gel absorbing carbon dioxide contained in a gas

摘要

The regeneration process comprises passing a gas filled with carbon dioxide through an absorbing gel, and extracting carbon dioxide from the gel in the form of iron carbonates or calcium carbonates and/or iron hydrogencarbonates or calcium hydrogencarbonates while precipitating a metal present in the form of cations in a regeneration liquid. The liquid is used for washing the carbon dioxide absorbing gel, and contains a buffer solution to maintain the pH of the liquid at a predetermined value. The cations are iron cations Fe 2+ coming from iron filings attacked by an acid. The regeneration process comprises passing a gas filled with carbon dioxide through an absorbing gel, and extracting carbon dioxide from the gel in the form of iron carbonates or calcium carbonates and/or iron hydrogencarbonates or calcium hydrogencarbonates while precipitating a metal present in the form of cations in a regeneration liquid. The liquid is used for washing the carbon dioxide absorbing gel, and contains a buffer solution to maintain the pH of the liquid at a predetermined value. The cations are iron cations Fe 2+ coming from iron filings attacked by an acid or calcium cations present in the form of calcium hydroxide. The pH of the regeneration liquid is acid or base. An independent claim is included for a device for the regeneration of carbon dioxide absorbing gel contained in a gas.