Nanoclay-based solid sorbents for carbon dioxide capture

• US 10,507,453 B2
• Filed: 11/01/2012
• Issued: 12/17/2019
• Est. Priority Date: 11/04/2011
• Status: Expired due to Fees

• Current Assignee: West Virginia University
• Original Assignee: West Virginia University
• Inventors: Gupta, Rakesh K., Agarwal, Sushant, Roth, Elliot
• Primary Examiner(s): Nassiri-Motlagh, Anita
• Application Number:
  US13/666,375
• Publication Number:
  US 20130121903A1
• Time in Patent Office: 2,602 Days
• Field of Search: None
• CPC Class Codes: B01D 2253/11 Clays
• CPC Class Codes: B01D 2253/25 Coated, impregnated or composite adsorbents
• CPC Class Codes: B01D 2257/504 Carbon dioxide
• 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 53/62 Carbon oxides
• CPC Class Codes: B01J 20/10 comprising silica or silicate
• CPC Class Codes: B01J 20/12 Naturally occurring clays or bleaching earth
• CPC Class Codes: B01J 20/22 comprising organic material
• CPC Class Codes: B01J 20/3204 Inorganic carriers, supports or substrates
• CPC Class Codes: B01J 20/3244 Non-macromolecular compounds
• CPC Class Codes: B01J 20/3257 the functional group or the linking, spacer or anchoring group as a whole comprising at least one of the heteroatoms nitrogen, oxygen or sulfur together with at least one silicon atom, these atoms not being part of the carrier as such
• CPC Class Codes: B01J 20/3259 comprising at least two different types of heteroatoms selected from nitrogen, oxygen or sulfur with at least one silicon atom
• CPC Class Codes: B01J 20/3272 Polymers obtained by reactions otherwise than involving only carbon to carbon unsaturated bonds
• CPC Class Codes: Y02C 20/40 of CO2
• CPC Class Codes: Y02P 30/00 Technologies relating to oil refining and petrochemical industry

Abstract

A nanoclay based solid sorbent is provided having a nanoclay with at least one surface, and at least one amine containing compound wherein the amine containing compound is attached to the surface, as well as a method of making it. A method of capturing carbon dioxide gas is disclosed includes passing a gas from an effluent process stream containing carbon dioxide through the nanoclay based solid sorbent and capturing the carbon dioxide gas on the surface and within the nanoclay based solid sorbent. The nanoclay based solid sorbent having the captured carbon dioxide gas is regenerated by undergoing one or more cycles of desorption of the captured carbon dioxide gas from the nanoclay. The regenerated nanoclay based solid sorbent may then be reused.

Claims

1. A regenerative nanoclay based solid sorbent consisting essentially of:

a layered nanoclay with at least one surface, and

at least one amine containing compound that is immobilized to the surface of said nanoclay by coating the substantial entirety of said surface forming an immobilized amine, wherein said immobilized amine is easily removable from said surface of said nanoclay by washing or frictional mechanical means; and

at least another amine containing compound that is grafted onto the at least one surface of said nanoclay, wherein said grafted amine compound is not easily removable from said surface of said nanoclay by washing or frictional mechanical means, wherein said grafted amine compound is selected from the group consisting of an organoamine and an aminosilane, wherein said surface of said nanoclay includes at least one of an edge of a platelet of said nanoclay, an interior portion of said nanoclay, and an exterior portion of said nanoclay, and at least one edge of a platelet, an interior portion, and an exterior portion of each layer of said nanoclay, wherein said layered nanoclay adsorbs carbon dioxide at a temperature ranging from 50°

C. to 85°

C. and desorbs carbon dioxide in the presence of carbon dioxide at a temperature ranging from 100°

C. to 155°

C. for a resultant multiple cycle regenerative nanoclay based solid sorbent for producing a pure carbon dioxide stream, and wherein said layered nanoclay has a sustainable carbon dioxide capacity of at least 85 percent of an initial carbon dioxide capacity after three cycles of regeneration, wherein said nanoclay is selected from the group consisting of a montmorillonite, a bentonite, a kaolinite, a halloysite, and a synthetic nanoclay.

2. The nanoclay based solid sorbent of claim 1 wherein said synthetic nanoclay is a mixed-metal hydroxide nanoclay.

3. The nanoclay based solid sorbent of claim 1 wherein said synthetic nanoclay is a layered double hydroxide nanoclay.

4. The nanoclay based solid sorbent of claim 1 wherein said synthetic nanoclay is selected from the group consisting of a laponite, a hectorite, a saponite, an indonite, and a sepiocite.

5. The nanoclay based solid sorbent of claim 1 wherein said organoamine is a polyamine.

6. The nanoclay based solid sorbent of claim 1 wherein said aminosilane is selected from the group consisting of an aminopropyltrimethoxysilane, an amiopropyltrimethoxysilane, a N-3-trimethoxysilyl-propyl-ethylenediamine, a N-3-trimethoxysilyl-propyl-diethylenediamine, an ethylhydroxylaminopropyl-trimethoxysilane, and a diethylhydroxyl-aminopropyltrimethoxysilane.

7. The nanoclay based solid sorbent of claim 1 wherein said organoamine is polyethyleneimine.

8. The nanoclay based solid sorbent of claim 1 wherein said amine containing compound that is grafted onto said surface of said nanoclay is selected from the group consisting of an aminopropyltrimethoxysilane, an amiopropyltrimethoxysilane, a N-3-trimethoxysilyl-propyl-ethylenediamine, a N-3-trimethoxysilyl-propyl-diethylenediamine, an ethylhydroxylaminopropyl-trimethoxysilane, and a diethylhydroxyl-aminopropyltrimethoxysilane.

9. The nanoclay based solid sorbent of claim 1 wherein said amine containing compound that is immobilized onto said surface of said nanoclay is polyethyleneimine.

10. The nanoclay based solid of claim 1 wherein said amine containing compound that is grafted onto said surface of said nanoclay is aminopropyltrimethoxysilane, and wherein said amine containing compound that is immobilized onto said surface of said nanoclay is polyethyleneimine.

11. The nanoclay based solid sorbent of claim 1, wherein said layered nanoclay adsorbs carbon dioxide at 85°

C.