Patent ID: 6402809
Filing Date: 2002-06-11
Classification: B01D,F25J,Y02C

Abstract:
Process for purifying a gas stream to be purified, containing at least one impurity chosen from carbon dioxide (CO2)and water vapour (H2O), comprising:at least one step of adsorbing, on at least one bed of adsorbent contained in at least one adsorber, at least some of the impurities contained in the gas stream to be purified, the gas stream to be purified being at an adsorption temperature (Ta), and at least one step of regenerating at least some of said bed of adsorbent contained in said at least one adsorber with at least one regeneration gas introduced into said at least one adsorber, the regeneration temperature (Tr) of said regeneration gas being greater than the temperature (Ta) of the gas stream to be purified, wherein at least one energy parameter, chosen from the flow rate of the regeneration gas entering and/or leaving said at least one adsorber, the duration of the regeneration step and the regeneration temperature (Tr) of said regeneration gas entering said at least one adsorber, is controlled, modified and/or regulated depending on at least one operating condition chosen from the pressure of the gas stream to be purified entering and/or leaving said at least one adsorber, the flow rate of the gas stream to be purified entering and/or leaving said at least one adsorber, the temperature (Ta) of the gas stream to be purified entering said at least one adsorber and/or the content of at least one of said impurities contained in the gas stream to be purified entering said at least one adsorber and depending on the thermal profile of the heat front output by at least one adsorber at the end of regeneration; the maximum temperature during the output of said heat front being measured and said measured maximum temperature being compared with a predetermined target temperature.