초록 ▼

An adiabatic adsorption method for pressure-swing adsorbers, e.g. for gas purification or separation of components of a gas mixture, in which several switchable adsorbers are used in an adsorption phase followed by at least two pressure-relief stages and at least one pressure buildup stage with an i

An adiabatic adsorption method for pressure-swing adsorbers, e.g. for gas purification or separation of components of a gas mixture, in which several switchable adsorbers are used in an adsorption phase followed by at least two pressure-relief stages and at least one pressure buildup stage with an intervening purging in the adsorption-desorption/regeneration cycle. According to the invention, at least one of the adsorbers is operated as an auxiliary adsorber by comparison with a main adsorber with a reduced contact time between the adsorption medium and gases in the auxiliary adsorber. This reduced contact time can result from a reduced adsorption-phase period by comparison with that of the main adsorber (reduced residence time) and/or by using a reduced charge of the adsorption medium in the auxiliary adsorber by comparison with that of the main adsorber.

대표청구항 ▼

In an adiabatic gas-adsorption method wherein a plurality of adsorbers are switchable through cycles including a regeneration phase and an adsorption phase and in which each regeneration phase includes at least two pressure-relief stages, at least one pressure-buildup stage and a purging stage, the

In an adiabatic gas-adsorption method wherein a plurality of adsorbers are switchable through cycles including a regeneration phase and an adsorption phase and in which each regeneration phase includes at least two pressure-relief stages, at least one pressure-buildup stage and a purging stage, the improvement in which said adsorbers are at least three in number and are functionally subdivided into a main group and an auxiliary group, said main group including at least one main adsorber and said auxiliary group including at least one auxiliary adsorber, and said auxiliary adsorber is operated with a contact time of a gas during its adsorption phase with its adsorbent which is less than the adsorption time of the main adsorber, at least one adsorber of one group in a pressure-relief or pressure-buildup stage being connected to an adsorber of the other group in a pressure-buildup or pressure-relief stage respectively for pressure equalization therebetween, and purge gas generated during a pressure-relief stage of an adsorber of one of said groups being used to scavenge an adsorber of the other of said groups during the purging stage thereof.