Pressure swing adsorption process
AssigneeLinde Aktiengesellschaft
InventorChristian Benkmann
Life of this patent
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Abstract
A pressure swing adsorption process conducted with plural cyclically reversible adsorbers, each of the adsorbers undergoing identical switching cycles. The switching cycles include sequentially at least one adsorption phase, at least two expansion phases, at least one desorption phase employing a purge gas which is foreign and inert relative to the material adsorbed in the adsorbent phase, a displacement phase employing a gas obtained from an expansion phase of one of the adsorbers to displace the purge gas, and at least one pressure build-up phase.
Claims9
In a pressure swing adsorption process for the purification or separation of gaseous mixtures, using plural, cyclically reversible adsorbers, each of which passes through identical switching cycles, wherein each switching cycle comprises sequentially at least one adsorption phase, two expansion phases, a desporption phase, and a pressure buildup phase, the improvement comprising effecting desorption by purging with a foreign gas, following the desorption with a displacement phase, and conducting the displacement of the foreign gas with a gas or gaseous mixture discharged during an expansion phase.
In a pressure swing adsorption process for the purification or separation of gaseous mixture, said process employing plural, cyclically reversible adsorbers, each adsorber passing through identical switching cycles with each cycle comprising sequentially at least one adsorption phase, two expansion phases, a desorption phase, and a pressure buildup phase, the improvement comprising the steps of purging each on adsorber during the desorption phase thereof with a foreign purge gas of low adsorbability relative to the gaseous component adsorbed, and displacing the foreign purge gas with a gas or gaseous mixture discharged during the expansion phase of another one of the plural adsorbers.
Dependencies are inferred from the claim text.