Modified cycles, adsorbents improve gas treatment, increase mol-sieve life

Natural gas treatment often uses adsorbents for contaminant removal. Special materials, such as molecular sieves, remove sulfur-containing impurities like mercaptans, as well as water vapor. Such operation may be prone to problems, particularly during regeneration of these molecular sieves. The transient thermal waves produced during regeneration, for example, may create unwanted byproducts like COS.Improper regeneration may ultimately reduce product quality if the temperature is too low or time is too short. On the other hand, excessive temperatures or heating times may reduce adsorbent life or cause adsorbate decomposition (or coking) in some instances.Modified cycling, as well as addit...

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