85Kr is a highly valuable radioactive gaseous nuclide.At present,China's 85Kr gas basically relies on imports to meet its usage demand.As an important technology of 85Kr industrial extraction and purification integrated production system,purification is an important means to obtain high-purity 85Kr.Therefore,it is necessary to carry out non-radioactive test to determine the important parameters of the purification process before the purification radioactive test and formal industrial production.In this study,a non-radioactive test bench based on low temperature preparation chromatographic method was set up to study the influence of chromatographic column packing material and temperature on the purification effect of krypton gas.The results showed that the coconut shell activated carbon had better purification effect than 5A molecular sieve;when the temperature of the chromatography column filled with coconut shell activated carbon decreased to-40℃,Kr could be completely separated from impurities such as nitrogen and oxygen,the purification effect of krypton gas was better,and the peaks of Kr-84 in the product gas were significantly higher than those of N2 and O2,and the purity of krypton gas was greatly improved.
关键词
85Kr/氪气/纯化/低温制备色层法
Key words
85Kr/Krypton/Purification/Low temperature preparation chromatography
维普
万方数据