... divalent calcium ion makes it an excellent adsorbent to remove water, CO2, H2S from sour natural gas streams, while minimising COS formation ... ) Production of high purity N2, O2, H2 and inert gases from mixed gas streams.Regeneration Molecular sieve Type 5A can be ... the pressure in the case of pressure swing processes. To remove moisture from a 5A molecular sieve, a temperature of 250-300 ...