Patent ID: 6402814
Filing Date: 2002-06-11
Classification: B01D,F25J,Y02C

Abstract:
Process for the treatment of a gas by Temperature Swing Adsorption (TSA) in at least two beds of adsorbent, in which each bed of adsorbent is subjected to a cycle which comprises, in succession: an adsorption phase, which itself comprises an adsorption step at a low adsorption temperature; an adsorbent regeneration phase, which itself comprises a depressurization step; a heating/elution step, during which the bed is purged with a hot heating/elution gas, and a cooling/elution step, during which the bed is purged with a cold cooling/elution gas; and a repressurization phase, in which:(a) the cooling/elution step is terminated while the cooling/elution gas leaving the bed is at a temperature of at least 30Â° C. greater than the temperature of the gas to be treated; (b) the adsorption phase comprises an initial adsorption step, during which the bed is cooled down to the low adsorption temperature due to the effect of the gas to be treated; (c) and wherein, during at least a first part of the initial adsorption step, the bed is connected up in parallel with another bed at the end of the adsorption phase, and the two gas streams coming from these two beds are combined.