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Electrochemical methods of sequestering co2

a technology of electrochemical methods and co2 is applied in the field of electrochemical methods of sequestering co2, which can solve the problems of unresolved environmental outcomes, limited capacity and duration, and economic and environmental problems, and achieve the effects of economic, environmental and social benefits, and the economic and environmental benefits of sequestering co2

Inactive Publication Date: 2010-06-03
CALERA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes methods for sequestering carbon dioxide by precipitating a stable product from an alkaline-earth-metal-containing water. The product can then be disposed of in various ways, such as placing it in a disposal location or using it in manufactured items like building materials. The patent also provides systems for practicing these methods. The technical effect of this patent is to provide a way to reduce carbon dioxide emissions and mitigate the impact of climate change.

Problems solved by technology

CO2 is a by-product of combustion and it creates operational, economic, and environmental problems.
The impact of climate change will likely be economically expensive and environmentally hazardous.
The limited capacity and duration, expense, and environmental outcomes of these methods are largely unresolved and may prohibit their utility.

Method used

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  • Electrochemical methods of sequestering co2
  • Electrochemical methods of sequestering co2
  • Electrochemical methods of sequestering co2

Examples

Experimental program
Comparison scheme
Effect test

example i

Precipitation of P00099

A. P00099 Precipitation Process

[0254]The following protocol was used to produce the P00099 precipitate. 380 L of filtered seawater was pumped into a cylindrical polyethylene 60°-cone bottom graduated tank. This reaction tank was an open system, left exposed to the ambient atmosphere. The reaction tank was constantly stirred using an overhead mixer. pH, room temperature, and water temperature were constantly monitored throughout the reaction.

[0255]25 g of granulated (Ca,Mg)O (a.k.a., dolime or calcined dolomite) was mixed into the seawater. Dolime that settled to the bottom of the tank was manually re-circulated from the bottom of the tank through the top again, in order to facilitate adequate mixing and dissolution of reactants. A second addition of 25 g of dolime was performed in an identical manner, including a manual recirculation of settled reactant. When the pH of the water reached 9.2, a gas mixture of 10% CO2 (and 90% compressed air) was slowly diffused...

example ii

Use of Fly Ash as an Alakali Source

A. Methods

[0264]500 mL of seawater (initial pH=8.01) was continuously stirred in a glass beaker using a magnetic stir bar. The pH and temperature of the reaction was continuously monitored. Class F fly ash (˜10% CaO) was incrementally added as a powder, allowing the pH to equilibrate in between additions.

B. Results and Observations:

[0265](Amounts of fly ash listed are the cumulative totals, i.e. the total amount added at that point in the experiment.)

After the additions of 5.00 g of fly ash the pH reached 9.00.

34.14 g->9.50

168.89 g->9.76

219.47 g->10.94

254.13 g->11.20

300.87 g->11.28

Much more fly ash was needed to raise the pH of the seawater than distilled water. The initial pH raise (8 to 9) required much less fly ash than the further raises. The pH remained fairly stable around 9.7 for much of the reaction. The rate of rate of pH increase went up after ˜10. Also of note was an initial drop in pH when the fly ash was added. This drop in pH is quick...

example iii

Production of High Yields

A. Process 1

[0267]A 20% CO2 / 80% Air gas mixture was sparged into 1 L of seawater until a pH 2 was added to the 1 L of carbonic acid / seawater solution. The 20 / 80 gas mixture continued to be sparged for 20 minutes to ensure maximal dissolution of the Mg(OH)2 and gases. After dissolution, sparging was stopped and 2M NaOH was added until a pH of 9.8 was reached. Sparging of the 20 / 80 gas was resumed until a pH of 8.5 was reached. 2M NaOH and counter-additions of the 20 / 80 gas were continued maintaining a pH range between 8.5 and 9.8 until a total of 200 ml of 2M NaOH was added. A yield of 6.91 g was observed having a Coulometer reading of 10.6% carbon (˜80% carbonate).

B. Process 2

[0268]A 20% CO2 / 80% Air gas mixture was sparged into 1 L of seawater until a pH 2 was added to the 1 L of carbonic acid / seawater solution. The 20 / 80 gas mixture continued to be sparged for 20 minutes to ensure maximal dissolution of the Mg(OH)2 and gases. After dissolution, sparging was...

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Abstract

Methods of sequestering carbon dioxide (CO2) are provided. Aspects of the methods include precipitating a storage stable carbon dioxide sequestering product from an alkaline-earth-metal-containing water and then disposing of the product, e.g., by placing the product in a disposal location or using the product as a component of a manufactured composition. Also provided are systems for practicing methods of the invention.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]Pursuant to 35 U.S.C. §119 (e), this application claims priority to the filing dates of: U.S. Provisional Patent Application Ser. No. 61 / 017,405 filed on Dec. 28, 2007; U.S. Provisional Patent Application Ser. No. 61 / 057,173 filed on May 29, 2008; U.S. Provisional Patent Application 61 / 073,319 filed on Jun. 17, 2008; U.S. Provisional Patent Application 61 / 082,766 filed on Jul. 22, 2008; U.S. Provisional Patent Application Ser. No. 61 / 088,340 filed on Aug. 12, 2008; U.S. Provisional Patent Application Ser. No. 61 / 088,347 filed on Aug. 13, 2008; U.S. Provisional Patent Application Ser. No. 61 / 101,626 filed on Sep. 30, 2008; and U.S. Provisional Patent Application No. 61 / 121,872 filed on Dec. 11, 2008; and Pursuant to 35 U.S.C. §120, this application claims priority to the filing dates of PCT Application No. PCT / US08 / 88242 entitled “Low-Energy Electrochemical Hydroxide System and Method,” filed on Dec. 23, 2008, and PCT Application No. PCT / U...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B01D53/62C01B32/50C01B32/55C01B32/60
CPCB01D53/1425Y02E60/366B01D53/1493B01D53/62B01D53/77B01D2251/402B01D2251/404B01D2257/302B01D2257/404B01D2257/504B01D2257/602C01B31/24C01F5/24C01F11/18C01P2004/03C02F1/66C02F1/683C04B7/367Y02C10/04Y02C10/06B01D53/1475Y02W10/33Y02W10/37Y02P40/18C01B32/60Y02P20/133Y02C20/40Y02E60/36Y02P20/151C01B32/50C01F11/182F25J3/00B01D53/14
Inventor CONSTANTZ, BRENT R.YOUNGS, ANDREWTUET, PHILIP BRIANOMELON, SIDNEYFARSAD, KASRAGILLIAM, RYAN J.DECKER, VALENTINKIRKWAY, DOUGLAS J.BARD, ALLEN J.DANZIGER, ROBERTFERNANDEZ, MIGUELRYAN, CECILY
Owner CALERA CORP
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