What is the impact of air separation with and without argon on nitrogen purity and yield?
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What is the impact of air separation with and without argon on nitrogen purity and yield? Additionally, regarding the requirement that nitrogen purity be 99.999%, how should this be determined? Should the total amount of oxygen and argon impurities be kept at 10 ppm, or should only the oxygen content be kept below 5 ppm? I would appreciate guidance from those with expertise!
Whether an argon system is included in the air separation unit has no impact on the purity of oxygen and nitrogen products; however, large-scale air separation units generally come equipped with an argon purification tower. The national standards do not specify any requirements regarding argon content in nitrogen gas – the focus is rather on the oxygen content in nitrogen, with some requirements being less than 10 ppm and others less than 3 ppm~~
The presence of argon has no effect on nitrogen purity; generally, those equipped with argon enhancement towers are used only to increase the oxygen extraction rate； The purity of nitrogen is generally such that 10 ppm should correspond to a mixture of oxygen and argon, with oxygen being the predominant component and argon in very small amounts.
What size of vacuum is usually required to reach the argon level in the argon enhancement tower?
According to the national standard 8979, high-purity nitrogen is required to have an oxygen content of less than 3 ppm; there is no requirement regarding argon, as its content is likely low anyway. The water content is required to be 3 ppm, while in other standards it should be below 1 ppm
Check the requirements for Yang Chundu and oxygen extraction rate~