~(14)CO and ~(12)CO Separation on Na-X Using Pressure Swing Adsorption at Low Temperatures

摘要

Economical ~(14)CO separation is very important to provide the means of removal and fixation of the radio-acitve carbon(carbon-14)in atomic power industry.~(13)C has been separated from ~(13)C/~(12)C CO or ~(13)C/~(12)C CH_4 by cryogenic process conventionally.However,since the separation factor is not so large,the separation cost is very expensive and thus the industrial application of ~(13)C is very limited.Meanwhile,there is no report on the separation of ~(14)C from ~(14)C/~(12)C until now.The authors found that there was a great difference on the adsorption equilibrium coefficient between ~(14)CO and ~(12)CO when they are adsorbed on low SiO_2/Al_2O_3 ratio Na-X type zeolite(Na-X)at low temperatures.