A process for the preparation of ultra-high purity carbon monoxide

摘要

Ultra-high purity carbon monoxide is prepared by electrolysis of pre-treated food grade carbon dioxide in a solid oxide electrolysis cell stack by mixing food grade carbon dioxide with a minor amount of oxygen and heating the mixture, passing the heated mixture through a catalytic oxidation reactor, feeding the hydrocarbon-free effluent from the catalytic oxidation reactor to a drying unit to remove the water to a maximum residual content of 1-3 ppmv and feeding the dry, hydrocarbon-free carbon dioxide stream from the drying unit to the fuel side of the solid oxide electrolysis cell stack with an applied current. Excess oxygen is transported to the oxygen side of the stack, and the product stream from the solid oxide electrolysis cell stack is subjected to a separation procedure to remove carbon dioxide from the carbon monoxide product.