Krypton in modern high-purity gas storage systems

Abstract

Krypton is a significant natural resource having great importance for modern industry, medicine, and science. The article considers the issue of preserving the purity of this inert gas of various grades, describes the main processes that can affect the amount of impurities in the gas, highlights the application of krypton nowadays. Experimental data aimed at elaboration of questions about the methodology of surface preparation before contact with high-purity krypton are presented. Besides, the amount of impurities from the time of container preparation for gas grade 5.8 was evaluated and dependences of moisture content on the method of preparation and type of surface, which is in contact with high-purity gas, were obtained. Also, statistics on filling containers with argon grade 6.0 and its preliminary preparation is collected. For parameter estimation cylinders with different type of surfaces are used, both unused and with service life of more than 10 years. The paper shows the variety of parameters that can affect the purity of the inert gas. Thanks to the data collected during the experiments, it becomes possible to adjust the requirements for the following works.