Inert purge cycle discussion

Gas bulk-separation processes consist mostly of pressureswing adsorption (PSA) variations and displacement-purge and Inert-purge processes Recently, however, a chromatographic cycle has been commercialized Below, these cycles will be discussed ... 

Gas bulk-seperalion processes consist mostly of PSA variations and displacement-purge and inert-purge procesrea These cycles are discussed below. Also, even (hough chromatography is covered in another chapter, reference is made hare and in following sections 10 several commercial chromatographic processes fur completeness of the discussion,... 

Hazards attendant on use of ethylene oxide in steriliser chambers arise from difficulties in its subsequent removal by evacuation procedures, owing to its ready absorption or adsorption by the treated material. Even after 2 evacuation cycles the oxide may still be present. Safety is ensured by using the oxide diluted with up to 90% of Freon or carbon dioxide. If high concentrations of oxide are used, an inert gas purge between cycles is essential [7]. The main factors in safe handling and use on laboratory or small pilot plant scales have been identified [8]. Safe operation of ethoxylation processes on industrial scale is discussed, with case histories [15],... 

As has been discussed in the foregoing sections, it is possible to combine cycles to take advantage of certain efficiencies. For example, in the TSA cycle, combining it with an inert gas purge, the time cycle is reduced. In the PSA cycle, it is possible to use a part of the adsorbed product as a low pressure purge to reduce energy requirements. 

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