Stabilized amine-containing CO;adsorbents and related systems and methods

• US 9,314,730 B1
• Filed: 12/22/2010
• Issued: 04/19/2016
• Est. Priority Date: 12/22/2009
• Status: Active Grant

• Current Assignee: Abdelhamid Sayari
• Original Assignee: Abdelhamid Sayari
• Inventors: Sayari, Abdelhamid, Belmabkhout, Youssef
• Primary Examiner(s): Smith, Jennifer A
• Application Number:
  US12/976,557
• Time in Patent Office: 1,945 Days
• Field of Search: 502 34- 56
• US Class Current: 1/1
• CPC Class Codes: B01D 2252/103 Water
• CPC Class Codes: B01D 2253/102 Carbon
• CPC Class Codes: B01D 2253/106 Silica or silicates
• CPC Class Codes: B01D 2253/108 Zeolites
• CPC Class Codes: B01D 2253/202 Polymeric adsorbents
• CPC Class Codes: B01D 2253/204 Metal organic frameworks (MOF's)
• CPC Class Codes: B01D 2253/25 Coated, impregnated or composite adsorbents
• CPC Class Codes: B01D 2253/306 Surface area, e.g. BET-specific surface
• CPC Class Codes: B01D 2253/308 Pore size
• CPC Class Codes: B01D 2253/311 Porosity, e.g. pore volume
• CPC Class Codes: B01D 2257/504 Carbon dioxide
• CPC Class Codes: B01D 2259/4005 Nature of purge gas
• CPC Class Codes: B01D 2259/40086 by using a purge gas B01D2259/4009 takes precedence
• CPC Class Codes: B01D 53/02 by adsorption, e.g. preparative gas chromatography solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01
• CPC Class Codes: B01D 53/0454 Controlling adsorption controlling temperature swing adsorption B01D53/0462, controlling pressure swing adsorption B01D53/047
• CPC Class Codes: B01D 53/62 Carbon oxides
• CPC Class Codes: B01J 20/22 comprising organic material
• CPC Class Codes: B01J 20/262 obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds per se C08G
• CPC Class Codes: B01J 20/28057 Surface area, e.g. B.E.T specific surface area
• CPC Class Codes: Y02C 20/40 of CO2

Abstract

The present invention provides (i) a method and system for stabilizing the performance of amine-containing CO₂ adsorbents using wet feed gas and/or wet purge gas and (ii) a method for regeneration of deactivated amine-containing CO₂ adsorbents via hydrolysis of the urea groups formed during deactivation.

Claims

1. A method of stabilizing an amine-containing CO₂ adsorbent over multiple adsorption-desorption cycles comprising contacting said amine-containing CO₂ adsorbent with one or more humid gas streams to stabilize the adsorbent, wherein the method comprises an adsorption step of contacting said amine-containing CO₂ adsorbent with said one or more humid gas streams, and subsequently a desorption step of contacting said amine-containing CO₂ adsorbent with said one or more humid gas streams or a dry gas stream, wherein said contacting steps are repeated during said multiple adsorption-desorption cycles of said system for removal of CO₂.

2. The method according to claim 1, wherein said one or more humid gas streams is a humid feed gas stream, a humid purge gas stream, or both a humid feed gas stream and a humid purge gas stream.

3. The method according to claim 2, wherein said amine-containing CO₂ adsorbent is within a system for removal of CO₂ from a humid CO₂-containing feed gas stream and wherein said method comprises contacting said amine-containing CO₂ adsorbent with said CO₂-containing humid feed gas stream and subsequently contacting said amine-containing CO₂ adsorbent with a humid purge gas stream.

4. The method according to claim 2, wherein the purge gas stream is a humid inert gas, a humid non-adsorbing gas, humid CO₂ or steam.

5. The method according to claim 1, wherein the relative humidity of each of the one or more humid gas streams is from about 0.1% to about 100%.