Adsorption regeneration heating considerations

Adsorption regeneration (desoiption) (Continued) pressure-swing temp erature- sw ing cooling considerations heating considerations Alumina, activated Amines, tertiary Antoine equation Association reactions Atomic volumes Axial mixing Azeotropic distillation calculations selection of entrainer... 

TSA cycles require a considerable amount of heat to raise the temperature of the adsorbent and vessel as well as to supply the heat of adsorption. The heating and cooling cycle is time consuming, typically over an hour. As a result, the TSA processes are used primarily for the removal of small concentrations of impurities from gases. Frequently, an inert gas purge is used in combination with increased temperature to assure complete regeneration. 

Silica gel is used for water removal applications. Regeneration is achieved by heating to approximately 150 °C, as compared to 350 °C for zeolites, where the heats of adsorption for water are considerably higher. Zeolites, however, have the advantage of higher water capacities at low relative pressures hence they are used at high temperatures. 

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