Carbon dioxide absorbent and method of using the same

• US 9,221,012 B2
• Filed: 01/13/2014
• Issued: 12/29/2015
• Est. Priority Date: 06/17/2010
• Status: Expired due to Fees

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Perry, Robert James, O'Brien, Michael Joseph
• Primary Examiner(s): Hopkins, Robert A
• Application Number:
  US14/153,548
• Publication Number:
  US 20140127105A1
• Time in Patent Office: 715 Days
• Field of Search: 951/49, 952/36
• US Class Current: 1/1
• CPC Class Codes: B01D 2252/20415 Tri- or polyamines
• CPC Class Codes: B01D 2252/205 Other organic compounds not covered by B01D2252/00 - B01D2252/20494
• CPC Class Codes: B01D 2258/0283 Flue gases
• CPC Class Codes: B01D 47/00 Separating dispersed particles from gases, air or vapours by liquid as separating agent B01D45/10 takes precedence; fractionating columns or parts thereof B01D3/16
• CPC Class Codes: B01D 53/1475 Removing carbon dioxide
• CPC Class Codes: B01D 53/1493 Selection of liquid materials for use as absorbents
• CPC Class Codes: B01D 53/62 Carbon oxides
• CPC Class Codes: C07F 7/0838 Compounds with one or more Si-O-Si sequences compounds with a ring containing only alternating Si and O atoms, i.e. cyclosilanes C07F7/21
• CPC Class Codes: C10K 1/16 with non-aqueous liquids
• CPC Class Codes: C10L 3/104 Carbon dioxide
• CPC Class Codes: Y02C 20/40 of CO2
• CPC Class Codes: Y02P 20/151 Reduction of greenhouse gas [GHG] emissions, e.g. CO2

Abstract

In accordance with one aspect, the present invention provides a composition which contains the amino-siloxane structures I, or III, as described herein. The composition is useful for the capture of carbon dioxide from process streams. In addition, the present invention provides methods of preparing the amino-siloxane composition. Another aspect of the present invention provides methods for reducing the amount of carbon dioxide in a process stream employing the amino-siloxane compositions of the invention, as species which react with carbon dioxide to form an adduct with carbon dioxide.

Claims

1. A method of reducing the amount of carbon dioxide in a process stream, comprising the step of contacting the stream with a carbon dioxide absorbent comprising at least one amino-siloxane compound selected from the group consisting of amino-siloxanes having structure I and amino-siloxanes having structure III,

2. The method according to claim 1, wherein the amino-siloxane is a liquid.

3. The method according to claim 1, wherein said process stream is at least one selected from the group consisting of a combustion process, a gasification process, a landfill, a furnace, a steam generator, and a boiler.

4. The method according to claim 1, wherein said process stream is a fuel stream.

5. The method according to claim 4, wherein said fuel stream comprises natural gas.

6. The method according to claim 4, wherein said fuel stream comprises syn gas.