Gas separation: processes – Solid sorption – Including reduction of pressure
Patent
1995-02-13
1996-04-09
Spitzer, Robert
Gas separation: processes
Solid sorption
Including reduction of pressure
95121, 95139, 95140, 95141, B01D 53047
Patent
active
055057640
ABSTRACT:
A process for restarting an adsorption receptacle which is part of an installation for the purification of hydrogen by pressure swing adsorption (PSA), which receptacle, during a hiatus in its operation, has been depressurized and then rendered inert with nitrogen. The receptacle is repressurized with practically pure hydrogen, and then the adsorption cycle is restarted in this receptacle. The repressurization is effected counter-current with respect to the adsorption direction in the receptacle. The receptacle is repressurized with hydrogen produced by the installation before the hiatus. The process can be used for the treatment of a catalytic hydrocarbon reforming gas, in which case the receptacle contains successively, in the adsorption direction, a layer of alumina, a layer of carbon and a layer of molecular sieve. Or the process can be used for the treating of a petroleum refinery residual gas, in which case the receptacle contains successively, in the adsorption direction, a layer of carbon with relatively large pores, a layer of carbon with relatively small pores and a layer of molecular sieve.
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L'Air Liquide Societe Anonyme pour L'Etude et L'Exploitation des
Spitzer Robert
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