# US 10,765,997 B1 · Regenerable non-aqueous basic immobilized amine slurries for removal of CO2 from a gaseous mixture and a method of use thereof

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- Number: US 10,765,997 B1
- Document ID: US10765997B1
- Status: Granted
- Kind: B1
- Application number: 16/110,352
- Filed: 2018-08-23
- Granted: 2020-09-08
- Earliest claimed: 2018-08-23
- Assignees: U.S. Department of Energy
- Applicants: Energy, United States Department of
- Inventors: Fan Shi; McMahan L. Gray; Jeffrey Culp; Brian W. Kail; Christopher Mark Marin
- Web page: https://patentgrep.com/patent/US10765997B1

## CPC

- B01D 53/1475: {Removing carbon dioxide}
- B01D 53/80: Semi-solid phase processes, i.e. by using slurries
- B01D 53/1493: {Selection of liquid materials for use as absorbents}
- B01D 53/62: Carbon oxides
- B01D 53/96: Regeneration, reactivation or recycling of reactants
- B01D 2252/204: Amines
- B01D 2252/205: Other organic compounds not covered by B01D2252/00 - B01D2252/20494
- B01D 2252/40: Absorbents explicitly excluding the presence of water
- B01D 2253/25: Coated, impregnated or composite adsorbents
- B01D 2257/504: Carbon dioxide
- B01D 2258/0283: Flue gases
- B01D 2259/806: Microwaves
- Y02A 50/20: Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02C 20/40: of CO2
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02C: CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]

## Abstract

The disclosure provides a composition for the separation of CO2 from a gaseous mixture and a method of use thereof. The composition comprises solid Basic Immobilized Amine Sorbents (BIAS) suspended in silicone oil. The method of use comprises contacting the gaseous mixture with a sorbent slurry comprising Basic Immobilized Amine Sorbents (BIAS) and silicone oil to at least partially absorb the CO2 from the gaseous mixture, and regenerating the BIAS slurry by causing desorption of the CO2.

## Claims

### Claim 1

A composition for the separation of CO2 from a gaseous mixture, the composition comprising:
a carrier fluid comprising polymerized silicone oil, wherein the carrier fluid has a molecular weight of less than 1500 g/mol; and,
basic immobilized amine sorbent (BIAS) is suspended in the carrier fluid.

### Claim 2 (depends on 1)

The composition of claim 1, wherein the carrier fluid has a boiling point greater than 200° C.

### Claim 3 (depends on 1)

The composition of claim 1, wherein the basic immobilized amine sorbent is a class 1 where class 1 are prepared by dry or wet impregnation of a support with a polyamine/hydrophilic solvent mixture, class 2 where class 2 are prepared by wet impregnation of a mixture of a reactive aminosilane and anhydrous hydrophobic solvent onto a dry pre-treated silica support, class 1/class 2 hybrid, or a combination thereof.

### Claim 4 (depends on 1)

The composition of claim 1, wherein the composition is hydrophobic.

### Claim 5 (depends on 1)

The composition of claim 1, wherein the CO2 capture capacity of the composition is greater than 0.8 mmol/L.

### Claim 6 (depends on 5)

The composition of claim 5, wherein the CO2 capture capacity of the composition is greater than 1.0 mmol/L.

### Claim 7

A composition for the separation of CO2 from a gaseous mixture, the composition comprising:
a carrier fluid comprising polymerized silicone oil; and,
basic immobilized amine sorbent (BIAS) is suspended in the carrier fluid, wherein the basic immobilized amine sorbent ranges from about 20 to about 35 wt. % of the composition.

### Claim 8 (depends on 7)

The composition of claim 7, wherein the basic immobilized amine sorbent ranges from about 27 to about 35 wt. % of the composition.

### Claim 9

A composition for the separation of CO2 from a gaseous mixture, the composition comprising:
a carrier fluid comprising polymerized silicone oil;
basic immobilized amine sorbent (BIAS) is suspended in the carrier fluid; and,
wherein the viscosity of the composition ranges from about 20 to about 50 cSt.

### Claim 10 (depends on 9)

The composition of claim 9, wherein the viscosity of the composition ranges from about 20 to about 30 cSt.

### Claim 11

A composition for the separation of CO2 from a gaseous mixture, the composition comprising:
a carrier fluid comprising polymerized silicone oil, wherein the carrier fluid has a molecular weight of less than 1500 g/mol and a boiling point greater than 200° C.; and,
basic immobilized amine sorbent (BIAS) is suspended in the carrier fluid, wherein the BIAS is a class 1 where class 1 are prepared by dry or wet impregnation of a support with a polyamine/hydrophilic solvent mixture, class 2 where class 2 are prepared by wet impregnation of a mixture of a reactive aminosilane and anhydrous hydrophobic solvent onto a dry pre-treated silica support, class 1/class 2 hybrid, or a combination thereof; wherein the basic immobilized amine sorbent ranges from about 27 to about 35 wt. % of the composition; wherein the viscosity of the composition is in a range from about 20 to about 30 cSt; wherein the CO2 capture capacity is greater than 1.0 mmol/L; and wherein the composition is hydrophobic.