Process for CO2 capture from gaseous streams

Patent metadata

Field	Value
Publication number	US-11607646-B2
Application number	US-201916545578-A
Country	US
Kind code	B2
Filing date	Aug 20, 2019
Priority date	Aug 29, 2018
Publication date	Mar 21, 2023
Grant date	Mar 21, 2023

Abstract

A process for selective capture of CO 2 from gaseous mixture comprising of: (a) spraying a bio-amine cluster; (b) capturing CO 2 through bio-amine cluster; and (c) desorption of CO 2 through solar assisted electro de-amination, wherein the bio-amine cluster is comprises of: an amine cluster comprising of a quaternary Isobutylamine (IB) with amine terminated Poly(L-lactide) as the chelating agent; a cluster stabilizing agent; a cluster micelle stabilizing agent; and a carbonic anhydrase (CA) functionalized matrix in 0.05-0.2 wt % of total wt % of bio-amine cluster and wherein the CA is obtained from a source selected from the group consisting of Bacillus thermoleovorans, Pseudomonas fragi, Bacillus stearothermophilus and Arthrobacter sp. and a process for production of bio-amine cluster.

First claim

The invention claimed is:

1. A process for selective capture of CO 2 from a gaseous mixture, the process comprising:
synthesizing an amine cluster by complexation of a C 2 -C 10 alkalomine in presence of a salt solution and a chelating agent;
adding a cluster stabilizing agent and a cluster micelle stabilizing agent to the amine cluster;
isolating a thermostable enzyme having an ability to bond with the cluster micelle agent, wherein the thermostable enzyme has a pH stability in acidic and alkaline media;
synthesizing a carbonic anhydrase (CA) functionalized matrix to encapsulate the thermostable enzyme;
adding the amine cluster to the matrix system to form a solvent system;
loading a reactor with the solvent system;
passing the gaseous mixture through the reactor to enable the solvent system to absorb the CO 2 from the gaseous mixture to form a CO 2 rich solvent system; and
passing the CO 2 rich solvent system through a solar assisted electrochemical cell wherein the CO 2 is desorbed from the solvent system to obtain pure CO 2 .

2. The process as claimed in claim 1 , wherein the amine cluster comprises a quaternary Isobutylamine (IB) with amine terminated Poly(L-lactide) as the chelating agent.

3. The process as claimed in claim 1 , wherein the cluster stabilizing agent is selected from the group consisting of Poly (ethylene glycol) diamine (PEGD), diamino butane, Urea, 1,6-Hexanediamine, Diethylenetriamine, N1,N1-Dimethylbenzene-1,2-diamine, 1, 3-Diaminopentane, and Ethylenediamine.

4. The process as claimed in claim 1 , wherein the cluster micelle stabilizing agent is a long chain alkyl amine or N-based alkyl amines and derivatives and is selected from the group consisting of N-[2-[(2-Aminoethyl) amino] ethyl]-9-octadecenamide (AMEO), n-Benzalkonium chloride (BAC), CnH(2n+1)-COO(CH2CH2O)12CH3, Polyoxythylene alkyl ether, n-Alkyltrimethyl ammonium surfactant, Potassium alkanoate, Dodecylpyridinium bromide, Octylglucoside, Sodium dodecyl sulfate, trans-Cinnamaldehyde, Sodium bis-(2-ethylhexyl)-sulfosuccinate, Cetylpyridinium chloride, Primary alcohol ethoxylate, Polyoxyethylene nonyl phenyl ether, Polyethylene glycol esters, Linoleate, and Dodecylamine.

5. The process as claimed in claim 1 , wherein the cluster stabilizing agent is poly (ethylene glycol) diamine (PEGD) and the cluster micelle stabilizing agent is N-[2-[(2-Aminoethyl) amino] ethyl]-9-octadecenamide (AMEO).

6. The process as claimed in claim 1 , wherein the carbonic anhydrase functionalized matrix comprises a porous matrix obtained by calcination of precipitates obtained by reacting CaCl 2 with tetraethylorthosilicate in presence of Pluronic F-127, cetyl trimethyl ammonium bromide, boric acid, and CO 2 .

7. The process as claimed in claim 1 , wherein the thermostable enzyme is extracted from Bacillus stearothermophilus.

8. The process as claimed in claim 1 , wherein synthesizing the amine cluster comprises:
synthesizing quaternary Isobutylamine (IB) by reacting C 2 -C 10 alkalomine or hindered amine and HCl in equimolar concentrations in presence of amine terminated Poly(L-lactide) (ATPL) as the chelating agent to obtain a reaction solution;
incubating the reaction solution in an ice bath for 30-60 minutes and at a temperature in a range of 55-60° C. for 60-80 minutes and thereafter allowing to cool the reaction solution at room temperature;
removing excess water and HCl from the reaction solution to attain a basic pH by using a rotary evaporator at a temperature in a range of 20-35° C.;
crystallizing the reaction solution using an equal volume of acetone and diethyl ether solvent at a volume ratio of 1:1 to obtain a solid crystalline layer;
separating and drying the solid crystalline layer at room temperature under vacuum;
dissolving the solid crystalline layer in deionized water in a weight ratio of 30:70;
adding 0.5 mM of the cluster stabilizing agent to obtain a solution;
stirring the solution for 20-40 minutes at room temperature;
adding 500 ppm of cluster micelle stabilizing agent to the solution; and
sonicating the solution for 2-10 minutes followed by stirring at room temperature for 15-30 minutes to obtain the amine cluster.

9. The process as claimed in claim 1 , wherein synthesizing a carbonic anhydrase (CA) functionalized matrix comprises:
synthesizing a porous matrix;
adding the porous matrix to an ethanol solution containing 0.5-2% v/v (3-Glycidyloxypropyl) trimethoxysilane and 0.5-2% v/v triethoxy-3-(2-imidazolin-1-yl) propylsilane to obtain a suspension;
incubating the suspension at 55-65° C. for 80-160 minutes with continuous stirring;
filtering and washing the suspension with deionized water and drying at room temperature to obtain a functionalized matrix;
suspending the functionalized matrix in a 50 mM sodium phosphate solution containing a thermo-stable carbonic anhydrase (CA);
stirring the functionalized matrix at 160-240 rpm for 80-160 minutes at room temperature to obtain a CA functionalized matrix; and
filtering and washing the CA functionalized matrix with deionized water.

10. The process as claimed in claim 9 , wherein synthesizing the porous matrix comprises:
preparing a solution of Pluronic F-127 (surfactant) and cetyl trimethyl ammonium bromide in deionized water and adding boric acid under stirring;
incubating the solution with continuous stirring for 10-30 minutes;
adding 0.5 M CaCl 2 ) to the solution obtained and incubating with vigorous stirring for 15-45 minutes;
adding tetraethylorthosilicate drop wise to the solution and passing CO 2 for 10-20 minutes to obtain a precipitate;
filtering and oven drying the precipitate; and
calcining the dried precipitate at a temperature of 160-240° C. for 240-360 minutes to obtain the porous matrix.

11. The process as claimed in claim 1 , wherein the gaseous mixture comprises carbon dioxide-containing flue gas, a process gas, or a gas from bio-methanation plants.

12. The process as claimed in claim 11 , wherein the CO 2 concentration in the gaseous mixture is in a range of 200 ppm to 30 vol % in the source gas.

13. The process as claimed in claim 1 , wherein the gaseous mixture is sparged into the reactor as a fine dispersion having bubbles of a micro or a nano size.

14. The process as claimed in claim 1 , wherein the gaseous mixture is passed through the reactor at a pressure in a range of 0.1 to 0.3 bar and at a temperature in a range of 20-70° C.

15. The process as claimed in claim 1 , wherein the solar assisted electrochemical cell comprises an electrochemical cell, a working electrode, a counter electrode, a reference electrode, a chelating salt, and a solar panel.

16. The process as claimed in claim 15 , wherein the working electrode comprises a 2D material coated stainless steel mesh, wherein the 2D material is porous graphene, MWCNT, gC 3 N 4 , or MoS 2 .

17. The process as claimed in claim 16 , wherein the working electrode is synthesized by sintering the 2D material on a surface of the stainless steel mesh along with a conducting polymer, and wherein the conducting polymer is poly(pyrrole)s (PPY), polycarbazoles, polyindoles, polyazepines, polyanilines (PANI).

18. The process as claimed in claim 15 , wherein the counter electrode is graphite or copper, and wherein the reference electrode is silver.

19. The process as claimed in claim 15 , wherein the chelating salt is a salt of elements of Group 2 comprising beryllium, magnesium, calcium, strontium, barium, and wherein the concentration of the salts is in a range of 10-500 ppm.

Assignees

• Indian Oil Corp Ltd

Inventors

• Kumar Manoj
• Sahoo Prakash Chandra
• Puri Suresh Kumar
• RAMAKUMAR Sankara Sri Venkata

Classifications

• B01D2252/604

  Stabilisers or agents inhibiting degradation · CPC title

• B01J20/22

  comprising organic material · CPC title

• B01J20/24

  Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives · CPC title

• B01D2252/602

  Activators, promoting agents, catalytic agents or enzymes · CPC title

• B01D53/1475 Primary

  Removing carbon dioxide · CPC title