| 摘要 |
PURPOSE:To remove carbon dioxide film a mixed gas contg. carbon monoxide with a variable pressure adsorption method by using an adsorption tower contg. a combination of an activated alumina layer and zeolite, and an activated alumina and an activated carbon layer. CONSTITUTION:The absorption towers and B are constituted of a combination of activated alumina, activated carbon, and a zeolite layer which are packed from the lower part of the adsorption tower in the described order. A raw gas is passed from the activated alumina layer side, and a purge gas for regenerating is passed from the zeolite layer side. The raw gas is introduced into the adsorption tower A under pressure, and a valve 2 is opened to increase the pressur from vacuum to the adsorption pressure. After the pressure in the adsorption tower A is increased to the adsorption pressure, a valve 5 is opened to keep the adsorption pressure at 0.5-1.0kg/cm<2>G. Carbon dioxide and carbon monoxide, which are easily adsorptive components, and a part of nitrogen are adsorbed, and the remaining part is recovered as the gaseous product. |
