Adsorbents for ozone recovery from gas mixtures
AssigneeAir Products and Chemicals, Inc.
InventorsKeith Alan Ludwig, Charles Gardner Coe, James Edward MacDougall, Arne Baumgartl
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Abstract
An improved adsorbent for ozone comprises a crystalline aluminosilicate in which at least 90% of the exchangeable cation content is in the acid form and further which contains between 0.5 and 20 wt % of one or more adsorbed components which are non-reactive with ozone. Preferably the adsorbed component is water, and the total non-framework metal content expressed as metal oxide is less than 0.4 mole %.
Claims18
A method for recovering ozone from an ozone-containing gas mixture which comprises contacting said gas mixture with an ozone-selective adsorbent whereby said ozone is selectively adsorbed by said adsorbent, and recovering said ozone by desorption from said adsorbent, wherein said adsorbent comprises a crystalline aluminosilicate in which at least 90% of the exchangeable cation content is in the acid form and further which contains between 0.5 and 20 wt % of one or more adsorbed components which are non-reactive with ozone.
A method for reducing the decomposition rate of ozone adsorbed on an adsorbent which comprises adsorbing on a zeolite adsorbent, prior to ozone adsorption, one or more components which are non-reactive with ozone, wherein the total non-framework metal content of said zeolite adsorbent is less than 0.4 mole % expressed as metal oxide.
An adsorbent for the recovery of ozone from ozone-containing gas mixtures which comprises a crystalline aluminosilicate in which at least 90% of the exchangeable cation content is in the acid form and further which contains between 0.5 and 20 wt % of one or more adsorbed components which are non-reactive with ozone.
Dependencies are inferred from the claim text.