Air Products and ITT WEDECO have recently disclosed a process for recovery unused oxygen from ozone generator gas. This is important since oxygen is a major cost factor for producing ozone and the conversion efficiency from oxygen to ozone is only 6-15%. Therefore, in most oxygen fed ozone systems, the vast majority of oxygen is wasted. The process shown in the schematic claims to recover about 70% of the oxygen. The basic process involves adsorbing ozone on a bed of molecular sieves and then stripping the ozone into a dry air stream. The air ozone stream is used for water treatment and the oxygen is recylced or recovered for reuse at the generator. A more detailed discussion is provided at our web page on ozone oxygen recovery.
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