PURIFICATION OF CARBON MONOXIDE FROM GASEOUS MIXTURE CONTAINING CARBON MONOXIDE BY USING ADSORBING METHOD

摘要

PURPOSE:To economically obtain high concn. carbon monoxide according to a pressure swing type adsorptive separation method, by using an adsorbent having selectivity to carbon dioxide and carbon monoxide. CONSTITUTION:Stock gas is introduced into an adsorbing tower A under pressure and a valve 1 is opened to raise pressure from a vacuum state. The valve 1 and an outlet valve 2 are closed while a valve 3 is opened to reduce and release the internal pressure of the adsorbing tower A to bring the same to the vicinity of atmospheric pressure. The valve 3 is closed while a valve 4 is opened from the lower part of the adsorbing tower and vacuum exhaustion is performed by using a vacuum pump to desorb a carbon dioxide component. The waste gas from a denitrification PSA apparatus is utilized by opening a valve 5 and carbon dioxide is expelled from the adsorbent by accompany adsorption with purge gas. A valve 6 is opened to perform pressurization by the product gas.