METHOD OF REMOVING CARBON DIOXIDE FROM GASEOUS MIXTURES

• US 3,619,130 A
• Filed: 08/27/1968
• Issued: 11/09/1971
• Est. Priority Date: 08/27/1968
• Status: Expired due to Term

• Current Assignee: Cyril J. Stockhausen, David M. Zall, Donald R. Decker Jr, Frank J. Ventriglio
• Original Assignee: Cyril J. Stockhausen, David M. Zall, Donald R. Decker Jr, Frank J. Ventriglio
• Inventors: Zall, David M., Ventriglio, Frank J., Stockhausen, Cyril J., Decker, Donald R. Jr.
• Primary Examiner(s): Thomas, Earl C.
• Application Number:
  US04/755,548
• Time in Patent Office: 1,169 Days
• Field of Search: 23/2,2.1,3,3.1,4,150,260,262 252/434,443,476,455Z
• US Class Current: 95/115
• CPC Class Codes: B01D 2253/108 Zeolites
• CPC Class Codes: B01D 2257/504 Carbon dioxide
• CPC Class Codes: B01D 2259/403 using three beds
• CPC Class Codes: B01D 2259/4566 for use in transportation means
• CPC Class Codes: B01D 53/04 with stationary adsorbents B01D53/025 takes precedence
• CPC Class Codes: B01D 53/62 Carbon oxides
• CPC Class Codes: B01J 20/186 Chemical treatments in view of modifying the properties of the sieve, e.g. increasing the stability or the activity, also decreasing the activity
• CPC Class Codes: Y02A 50/20 Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
• CPC Class Codes: Y02C 20/40 of CO2

Abstract

Method for removing CO2 from air by passing said air through said sorbent material made by treating molecular sieve-type zeolite with aqueous solution of any alkali carbonate. The sorbent material may be regenerated repeatedly by passing either heated air or superheated steam therethrough.

Claims

2. A gas purification process for removing carbon dioxide from a gas mixture as set forth in claim 1 further comprising the steps of:

heating the gas mixture prior to passing the gas mixture through the sorbent material; and

commencing said step of passing said gas mixture, immediately after sorbent regeneration is completed.

3. A gas purification process for removing carbon dioxide from a gas mixture as set forth in claim 2 wherein:

said alkali carbonate comprises potassium carbonate.

4. A gas purification process for removing carbon dioxide from a gas mixture as set forth in claim 2 wherein:

said gas mixture is heated to a temperature in the vicinity of 320* F.; and

said steam is superheated to a temperature in the vicinity of 400* F.

5. A gas purification process for removing carbon dioxide from a gas mixture as set forth in claim 4 wherein:

said heating step includes the step of passing the purified effluent from said sorption column through a heat exchanger to cool the purified gas and to heat the gas mixture.

6. A gas purification process for removing carbon dioxide from a gas mixture as set forth in claim 5 wherein:

the regeneration effluent from said sorbent material column comprises steam and gaseous carbon dioxide;

said effluent being passed through a cooling condenser for condensing said steam and freeing said gaseous carbon dioxide.