By Richard Betzendahl2012-02-13T14:36:00
Rare gases, which include krypton (Ke), xenon (Xe), and neon (Ne), are byproducts of air separation units (ASUs) that produce large quantities of oxygen and nitrogen. Historically, to be economically feasible, the rule of thumb was that an ASU must produce at least 1,000 tons per day (tpd) of oxygen ...
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