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Formulation and process for CO2 capture using amino acids and biocatalysts

A biocatalyst, amino acid technology, applied in the field of CO2 capture, can solve the problems of low ionic strength, not biodegradable, protein stability and unfavorable function

Inactive Publication Date: 2012-07-04
CO2 SOLUTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aside from being the most widely studied and applied capture method, other reasons for the continued preference for amine solutions for catalytic enhancement are their relatively low ionic strength, a property thought to be important for carbonic anhydrase hydration activity, Because high ionic strength may be detrimental to protein stability and function
[0023] However, amine-based solutions tend to degrade and oxidize, are not biodegradable, and have high vapor pressure

Method used

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  • Formulation and process for CO2 capture using amino acids and biocatalysts
  • Formulation and process for CO2 capture using amino acids and biocatalysts
  • Formulation and process for CO2 capture using amino acids and biocatalysts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Experiments were carried out in an absorption packed column. The absorption solution is an aqueous solution of potassium taurate (1,5M). The absorption solution and CO 2 The gas phase was contacted in countercurrent at a concentration of 130,000 ppm. The liquid flow rate was 0.65 g / min and the gas flow rate was 65 g / min, corresponding to a L / G of 10 (g / g). The gas and absorbing solution are at room temperature. The operating pressure of the absorber was set at 1.4 psig. The tower has a diameter of 7.5 cm and a height of 50 cm. The packing is 0.25 inch polymeric Raschig rings. Two tests were carried out: the first without biocatalyst and the second with carbonic anhydrase immobilized to the packing support.

[0083] The obtained results show that with carbonic anhydrase immobilized on the surface of Raschig rings, CO 2 transfer rate or CO 2 Increased removal rate from 83 to 117mmol CO 2 / minute. These results clearly demonstrate the positive effect of adding en...

Embodiment 2

[0085] The test was carried out in a stirred cell at an enzyme concentration of 500 mg / L in solutions of potassium glycinate (or the potassium salt of glycine) at concentrations of 0.1, 0.25 and 0.5 M and at a temperature of 20°C. The enzyme used was human carbonic anhydrase II (HCAII). initial CO 2 The loading is 0 mol / mol. The stirred tank contains the absorption solution (and enzymes, when required). Pure CO 2 A continuous stream of 1.0 is swept over the liquid phase in the stirred tank, and the pH change of the solution is monitored. Correlates changes in pH to changes in inorganic carbon concentration, which is used to calculate CO 2 transfer rate. The tests were carried out with and without enzymes to be able to determine the effect of the enzymes. Results are expressed as CO with enzyme 2 Transfer rate versus CO in the absence of enzyme 2 ratio of transfer rates (see image 3 ). The results clearly show that for K 2 CO 3 In all tests of the solutions, the en...

Embodiment 3

[0088] The tests were carried out in a stirred cell at an enzyme concentration of 500 mg / L in potassium methionine solutions (potassium salt of L-methionine) at concentrations of 0.1 and 0.25 M and at a temperature of 20°C. The enzyme used was human carbonic anhydrase II (HCAII). initial CO 2 The loading is 0 mol / mol. The stirred tank contains the absorption solution (and enzymes, when required). Pure CO 2 A continuous stream of 1.0 is swept over the liquid phase in the stirred tank, and the pH change of the solution is monitored. Correlates changes in pH to changes in inorganic carbon concentration, which is used to calculate CO 2 transfer rate. The tests were carried out with and without enzymes to be able to determine the effect of the enzymes. Results are expressed as CO with enzyme 2 Transfer rate versus CO in the absence of enzyme 2 Scale of transfer rates (see Table 1). The results clearly show that for all tests tested with potassium methionine solution, the e...

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Abstract

A formulation and a process for CO2 capture, where a CO2-containing gas in contacted with water, biocatalyst and an amino acid compound, enabling the dissolution and transformation of the CO2 into bicarbonate ions and hydrogen ions, producing an ion-rich solution and a CO2-depleted gas. The amino acids may present slow absorption kinetics and having elevated stability such that absorption is enhanced in combination with the biocatalyst. The amino acid compound and the biocatalyst may be selected such that the active sites of the biocatalyst benefit from proton removal facilitated by the amino acid compounds, thus improving the CO2 absorption.

Description

field of invention [0001] The present invention generally relates to CO 2 capture, and more specifically involves the use of amino acids and biocatalysts to capture CO 2 formulations and methods. Background of the invention [0002] Increasingly urgent warnings from the scientific community around the world of the dangers of climate change, as well as greater public awareness and concern for the issue, have fueled interest in reducing anthropogenic emissions of greenhouse gases (GHGs), most notably carbon dioxide. Increased dynamics of global regulation. Ultimately, North American and global CO 2 Significant reductions in emissions will require CO2 2 The largest single-source electricity production industry shrinks. According to the GHG program of the International Energy Agency (IEA), as of 2006, there were nearly 5,000 fossil fuel power plants worldwide, generating nearly 11 billion tons of CO 2 , accounting for the global total anthropogenic CO 2 nearly 40% of emis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/62B01D53/14B01D53/86
CPCB01D2252/504B01D2257/504B01D53/62B01D2252/205Y02C10/04Y02C10/06B01D2252/602B01D53/1493B01D2252/20494B01D53/96B01D2255/804Y02C20/40Y02A50/20
Inventor 西尔维·弗拉代特朱莉·金格拉斯乔纳森·卡利格伦·R·凯利奥利维拉·切佩尔科维奇
Owner CO2 SOLUTION