ELIMINERING AF SO2 OG CO2 FRA EN GAS PATENTKRAV

A process to treat/clean a gas, containing SO2, CO2 and O2 comprising the steps of: bringing the gas in contact with an activated carbon catalyst, converting SO2 to SO3/H2SO4 on the activated carbon catalyst, washing the SO3/H2SO4 from the activated carbon catalyst to obtain a sulfuric acid solution and a SO2 depleted gas; bringing the SO2 depleted gas in contact with an aqueous ammonia solution wherein CO2 is converted to obtain a SO2 and CO2 depleted gas containing ammonia; and bringing the SO2 and CO2 depleted gas containing ammonia in contact with the sulfuric acid solution obtained in step a. to form a solution containing ammonium sulfate and a treated, clean gas.