Adsorption With Dry Regeneration

//Adsorption With Dry Regeneration
Adsorption With Dry Regeneration2017-10-30T14:43:39+00:00

Project Description

Polaris has recently developed a new technique for the adsorption/desorption with activated carbons (or other adsorbent materials) of volatile organic compounds from gaseous emissions, and which has already been used successfully in some industrial applications (national and international patent PCT/IB2003/001247).
The adsorption phase proceeds as usual, but with a pretreatment of the emission in order to minimise the water humidity present in the effluent. The relevant innovation is related to the regeneration phase of the adsorption bed, and consists of a procedure of heating the bed with hot nitrogen in closed circuit, and desorption under vacuum, in order to realise a quantitative removal of the adsorbed compounds, associated to the simultaneous use of cryogenic energy of evaporated liquid nitrogen which is recovered as gas and used in the regeneration circuit to keep an inert atmosphere. Only a very little nitrogen flow, but enriched and saturated with the desorbed compounds, is sent to a cryogenic condenser, where such compounds are quantitatively separated from the stream and recovered, using the above mentioned cryogenic energy, eventually integrated by lower cost utilities (cooling tower or chilled water).