Temperature swing adsorption
AssigneeAir Products and Chemicals, Inc.
InventorsMohammed Ali Kalbassi, Rodney John Allam, Timothy Christopher Golden
Life of this patent
Estimating the term…
Abstract
Temperature swing adsorption to remove CO.sub.2 from a gas stream is conducted using alumina to adsorb all the water and at least most of the carbon dioxide from the gas stream. Optionally a downstream zone of zeolite may be provided to remove further carbon dioxide and hydrocarbons.
Claims26
A process for the temperature swing adsorption of at least carbon dioxide and water from a feed gas to form a purified gas for subsequent cryogenic treatment, comprising contacting the feed gas at a first temperature with a solid adsorbent comprising agglomerates of activated alumina, impregnated with an adsorption enhancing impregnant of a basic solution having a pH of 9 or more, to adsorb all of said water and substantially all of said carbon dioxide so as to produce a dry, purified gas from which at least most of the carbon dioxide has been removed, and periodically regenerating the adsorbent by contacting the adsorbent with a regenerating gas at a second temperature in excess of said first temperature but below a calcining temperature of the impregnant to desorb said carbon dioxide and water from said adsorbent by said regenerating gas at said second temperature.
Dependencies are inferred from the claim text.