CONCENTRATION OF CARBON MONOXIDE IN GASEOUS MIXTURE CONTAINING CARBON MONOXIDE BY USING ADSORBING METHOD

摘要

PURPOSE:To enhance CO-concn. by making effective use of a purge process, by connecting an adsorbing tower completed in CO-adsorption and an adsorbing tower completed in vacuum adsorption so as to level the pressures of both adsorbing towers, and reducing the remaining of a hardly adsorbing component before purging product gas. CONSTITUTION:A valve 1 is opened to introduce stock gas (a) into an adsorbing tower A under pressure and a valve 3 is opened to recover hardly adsorbable gas into a gas holder 13. A stock gas supply valve 1 and the outlet valve 3 are closed and, subsequently, a valve 5 is opened to make the internal pressures of the adsorbing tower A almost same to that of an adsorbing tower B through the connection pipe to the adsorbing tower B to adsorb gas of which the pressure is released in the adsorbing tower B. The valve 7 on the line from a product gas tank 12 is opened and a purge process is performed from the lower part of the adsorbing tower A. After the purge process is finished, the valves 5, 7 are closed and a valve 9 from the lower part of the adsorbing tower A is closed while a vacuum pump is used to perform vacuum exhaustion and the easily adsorbable component adsorbed with the adsorbent is desorbed.