WO2007022595A1 - Adsorbant pour gaz - Google Patents

Adsorbant pour gaz Download PDF

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Publication number
WO2007022595A1
WO2007022595A1 PCT/AU2006/001238 AU2006001238W WO2007022595A1 WO 2007022595 A1 WO2007022595 A1 WO 2007022595A1 AU 2006001238 W AU2006001238 W AU 2006001238W WO 2007022595 A1 WO2007022595 A1 WO 2007022595A1
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WO
WIPO (PCT)
Prior art keywords
concentration
water
solution
carbon dioxide
component
Prior art date
Application number
PCT/AU2006/001238
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English (en)
Inventor
Oscar Zelayandia
Original Assignee
Agriforce Pty Ltd
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Filing date
Publication date
Priority claimed from AU2005904622A external-priority patent/AU2005904622A0/en
Application filed by Agriforce Pty Ltd filed Critical Agriforce Pty Ltd
Publication of WO2007022595A1 publication Critical patent/WO2007022595A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1493—Selection of liquid materials for use as absorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1456—Removing acid components
    • B01D53/1462—Removing mixtures of hydrogen sulfide and carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1456—Removing acid components
    • B01D53/1468—Removing hydrogen sulfide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1456—Removing acid components
    • B01D53/1475—Removing carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1456—Removing acid components
    • B01D53/1481—Removing sulfur dioxide or sulfur trioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/62—Carbon oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B01D2251/604—Hydroxides
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2

Definitions

  • This invention relates to an adsorbent for absorbing or trapping gases inclusive of carbon dioxide.
  • the adsorbent may also be used for trapping, sulphur dioxide and nitric oxide as well as gaseous emissions or liquids which contain these gases.
  • Calcium hydroxide absorbents for absorbing carbon dioxide are described in US Patent Application 20040048742 which comprises 83-97% calcium hydroxide; 5-25% of water; and 0.05-5.0% of a rheology modifier which may include a phosphoric acid or salt thereof. There also may be included 0.1-6.0% of calcium chloride and 0.01-5.0% of a colour indicator dye. This absorbent is in the form of particles having an average length of 1 mm to 10mm and an average width of 0.5-5.0mm.
  • US Patent Application 20040029730 describes a carbon dioxide absorbent formulation comprising a pharmaceutically acceptable hydroxide such as calcium hydroxide essentially free of sodium, potassium and barium hydroxides; calcium and/or magnesium chloride; a hardening agent selected from alumina silicate, alumino silicate or complex alumino silicate and a non-film forming binding agent comprising derivatised celluloses, gums and starch.
  • a pharmaceutically acceptable hydroxide such as calcium hydroxide essentially free of sodium, potassium and barium hydroxides; calcium and/or magnesium chloride
  • a hardening agent selected from alumina silicate, alumino silicate or complex alumino silicate and a non-film forming binding agent comprising derivatised celluloses, gums and starch.
  • the resulting absorbent granules like the particles of US Patent Application 20040048742 can be used in absorbing carbon dioxide in medical anaesthesiology wherein a gas stream containing
  • the invention therefore in one aspect relates to a liquid precursor formulation for absorbing carbon dioxide which contains the following components:
  • the concentration of component (i) is from 5 to 20 g/l, more preferably 5-20 g/l and most preferably 6.5 g/l.
  • the concentration of component (ii) may be from 45 to 60 g/l, more preferably 45 to 50 g/l, and most preferably 46.5 g/l.
  • the precursor solution may have an initial conductivity of 50,000 to 120,000 ⁇ S/cm and a specific gravity of 1.0-1.8 and more preferably 1.17. It will also be appreciated that the liquid precursor solution may also contain potassium permanganate for removing other gases from gaseous emissions from boilers or flue gases. Thus such gaseous emissions contain impurities such as sulphur dioxide and nitrogen oxides such as nitric oxide or nitrogen dioxide.
  • the potassium permanganate is useful in facilitating in the removal of such gases from such gaseous emissions.
  • the potassium permanganate when included in the composition may have a concentration of 0.3-1.5 g/l, more preferably 0.5-1.5 g/l and most preferably 1.0 g/l.
  • the liquid precursor formulation in use is dissolved in water so as to provide a diluted solution which has a pH of 8.0 - 13.5 and more preferably 10.2 - 11.0 and a conductivity of 500 - 60000 ⁇ S/cm.
  • the formulation may be diluted in tap water or water around a neutral pH it is desirable that the formulation be dissolved in bore water or sea water which has a high concentration of carbonated salts such as sodium carbonate or bicarbonate as well as sodium chloride which enhances conductivity.
  • a dilution factor of the precursor absorbent solution may be from 0.5 - 5.0% although in relation to sea water or bore water this dilution factor may be from 0.5 - 2.5%.
  • the calcium hydroxide function is to absorb carbon dioxide out of gas streams containing carbon dioxide by reaction with carbon dioxide to form the calcium carbonate. This reaction is favoured by relatively high pH which favours the production of carbonate ion instead of bicarbonate ion. Thus is the purpose of the inclusion of potassium hydroxide.
  • Potassium permanganate may also be involved in the removal of sulphur dioxide wherein sulphate ion is produced as well as manganese dioxide. However the water itself may assist in efficient removal of sulphur dioxide which may form sulphate anion at high pH.
  • Nitrogen monoxide or nitric oxide (NO) may also be in the gaseous emissions and the removal of this gas is facilitated by the reaction with permanganate which eventually produces nitrate.
  • the permanganate may be reduced to manganese dioxide.
  • the high conductivity of the water is desirable because to create a favourable environment for the binding or reaction described above.
  • the solid residue When the diluted solution has reached a pH of 6.4 - 6.8, the solid residue will be in the bottom of the container and the water is ready for a reload a new batch of precursor solution. Otherwise, after removal of the solid residue the water remaining can be used for irrigation of crops or further dilution of precursor solution.
  • the gas is bubbled through the solution preferably so that it reaches the bottom of the container so that it is under greater pressure from the weight of the solution so that the pressure will be around 1.5 to 2.5 kilopascal.
  • This pressure results in the carbon dioxide being trapped in the diluted solution and subsequently converted to bicarbonate and subsequently carbonate ion with a subsequent pH drop in the diluted solution to 6.5 to 7.0.
  • the solid residue as described above which may comprise calcium carbonate, calcium hydroxide and manganese oxide.
  • the diluted solution of the invention may also be utilised as a method of storage of carbon dioxide, nitric oxide or sulphur dioxide or a combination of these gases for regeneration or disposal as required.
  • potassium hydroxide having a concentration of 47.5 g/l was mixed with water and agitated for 15 minutes.
  • FIG 1 shows infrared spectra vs time of the gases emitted from the
  • FIG 2 shows infrared spectra vs time of the carbon dioxide emitted from the 4WD vehicle and recorded directly in the FTIR instrument in Example 1 ;
  • FIG 3 shows chemigrams (Areas under the infrared peaks) of the carbon dioxide (CO 2 ) recorded from the 4WD vehicle (420 units cone.) and Air emissions ( ⁇ 0 units cone) having regard to Example 1 ;
  • FIG 4 shows chemigrams (Areas under the infrared peaks) of the carbon dioxide (CO 2 ) from the 4WD vehicle and recorded after passing through a solution of sea water and the precursor solution (1), bore water and the precursor solution (2) and just air (3) having regard to Example 1 ;
  • FIG 5 shows chemigrams of CO 2 from the 4WD after passing through sea water (1), bore water (2) and sea water/precursor solution (3) having regard to Example 1 ;
  • FIG 5A and 5B shows an XPS analysis of the sea water deposit referred to in Table 1 ;
  • FIG 6 shows XPS spectrum (Survey wide scan) of the solid sample in Example 2.
  • FIG 7 shows XPS spectrum of the carbon region (C1s) and assignments of the C-peaks discussed in Example 2;
  • FIG 8 shows XPS spectrum of the Oxygen region (O 1s) and assignments of the obtained peaks after deconvolution and curve fitting of the oxygen spectrum discussed in Example 2
  • FIG 9 shows XPS spectrum of the calcium region (Ca 1s) and assignments of the Ca-peaks discussed in Example 2;
  • FIG 10 shows XPS spectrum of the manganese region (Mn 1s) and assignments of the Mn-peaks discussed in Example 2;
  • FIG 11 shows infrared spectrum of the solid sample in Example 2;
  • FIG 12 shows infrared signals of the solid sample obtained in
  • Example 2 Example 2 and calcium carbonate. There are clear similarities between the two spectra, indicating that Calcium Carbonate is the main component present in the solid sample;
  • FIG 13 shows CO 2 (differential between ambient air and concentration in the chamber) of car exhaust prior to trapping in Example 3;
  • FIG 14 shows CO 2 levels (differential between ambient air and concentration in the chamber) in the plastic container with the bore water and the absorbent solution, before starting the engine described in Example 3;
  • FIG 15 shows CO 2 levels (differential between ambient air and concentration in the chamber) while bubbling through the bore water solution described in Example 3
  • FIG 16 shows CO 2 levels (differential between ambient air and concentration in the chamber) while bubbling through the bore water solution described in Example 3;
  • FIG 17 shows CO2 levels (differential between ambient air and concentration in the chamber) of car exhaust prior to trapping as described in
  • Example 4 Having regard to FIG 17 the plateau of readings represents the maximum possible reading by the gas analysers used in the experiment.
  • the vehicle motor was started 20 seconds after beginning of the experiment;
  • FIG 18 shows CO 2 levels (differential between ambient air and concentration in the chamber) in the plastic container with the bore water and the absorbent solution, before starting the engine as described in Example 4;
  • FIG 19 shows CO 2 levels (differential between ambient air and concentration in the chamber) while bubbling through the seawater solution as described in Example 4;
  • FIG 20 shows operation of a boiler whereby emissions from the boiler are passed through the diluted absorbent solution of the invention.
  • XPS X-ray Photoelectron Spectroscopy
  • Carbon dioxide was detected and measured using an integrated TA Instruments/Nicolet NEXUS Evolved Gas Analysis system.
  • This system consists of a Nicolet NEXUS FT-IR spectrometer fitted with a TGA Interface Unit (Gas Cell). Carbon dioxide was detected in the infrared region of 2240 - 2400 cm "1 wavelength. Spectral data were acquired every 30s as the gas emissions were collected into the Gas Cell. The IR Gas Cell and transfer lines between the engine or the Absorbent solution (2OL volume) and the FT- IR unit were held at 220 0 C to avoid condensation of gases.
  • the diluted solution had a pH of 11.0 and a conductivity of 4000 ⁇ S/cm.
  • the hoses with the gas emissions from the 4WD vehicle were directly submerged to the bottom of the 2OL tank.
  • the tank was sealed off at the top and the gases emitted from the solution were collected and transferred to the FTIR Gas Cell by a hose attached to the top side of the plastic tank.
  • the FTIR Instrument used for the detection and measurement over time of carbon dioxide generated from the 4WD vehicle took measurements before and after carbon dioxide trapping with the absorbent solution.
  • the 3D set of infrared spectra collected directly (without being treated by the absorbent solution) from the 4WD vehicle are shown in Figures 1 and 2.
  • Carbon dioxide has been assigned to the 2230 -2400 cm “1 region of the FT-IR spectrum.
  • the plots (“chemigrams") below monitor the peak area of this region of the Infrared spectra during emission of exhaust gases from the 4WD vehicle over a period of 60 minutes.
  • Chemigrams areas of the CO 2 infrared peak
  • the gases (and Air) were directly collected into the FT-IR Instrument, without passing through the absorbent solution.
  • the 1 X' and 1 Y' axes represent time (min) and the arbitrary value of the area under the CO 2 peak, respectively. Therefore, it is important to keep in mind that the area of the CO 2 peak is an arbitrary measurement, it doesn't have any particular units, is only suitable for a comparison of the CO 2 areas of one sample (let say gases collected from bore water without the precursor absorbent solution) and another sample (gases after passing through bore water with the precursor absorbent solution). Therefore, in Figure 5 the relative concentration of CO 2 detected from the 4WD is about 420 times higher than the CO 2 in Air.
  • Figure 5 shows the Chemigrams of CO 2 coming from the 4WD and collected after passing through the 2OL tank of sea water (1) and bore water (2) without the precursor solution (3).
  • the CO 2 collected from Sea Water with the precursor solution (3) is also included.
  • Figure 5 reveals that initially the CO 2 from the 4WD engine that is flushed through sea and bore water, dissolves up to a saturation point. This point is about 7 minutes and 18 minutes for Sea Water and Bore Water, respectively. Above this point, the water can't dissolve any more CO 2 and therefore the gas reach the maximum value (about 420 units of relative concentration) as generated from the 4WD engine.
  • Example 2 PTL was requested to chemically characterise a solid precipitate sample. This sample was obtained from the process as described above in Example 1. Specifically the following tests were performed in the characterization of the chemical composition of the solid residue sample:
  • the sample used for analysis was obtained by filtration of the solid residue at the bottom of a liquid absorbent solution.
  • the filtrate was dry until constant weight in the oven at 60 0 C.
  • XPS X-Ray Photoelectron Spectroscopy
  • ESA electron spectroscopy for chemical analysis
  • Figures 6 to 10 show the XPS spectra of the solid sample (Survey), Carbon, Oxygen, Calcium and Manganese regions, respectively. The assignments of the different peaks present in each spectral region are included and the Tables with the values of Atomic Mass and relative concentrations (Atomic Cone. And Mass Cone, %) of the chemical species present in the sample.
  • FT-IR is a technique used to characterise the chemical structure of materials.
  • a beam of (infrared) light is shone on a material and the way in which this light is absorbed as a function of the light frequency is monitored.
  • This absorption versus frequency spectrum provides a "fingerprint" of the material and can be used to infer its chemical structure.
  • FT-IR spectra were collected using FCDD's Nicolet Nexus FT-IR spectrometer in a Transmission mode, via mixing of the sample (2 % w/w) with Potasium Bromide (KBr) salt, which provides the background of the Infrared spectra.
  • FT-IR spectra in the mid-IR region of the spectrum (4000 cm "1 to 700 cm '1 ) were taken, as shown in Figure 11.
  • Figure 12 shows the Infrared signal of the sample and the Infrared spectrum of Calcium Carbonate. The similarity of both spectra indicates that most of the Infrared signal of the solid sample corresponds to Calcium Carbonate (CaCOs), confirming the results obtained from the XPS analysis.
  • the large peak at 3446 cm-1 corresponds to the stretching vibrations of the O-H groups present in Ca(OH) 2 and from any residual moisture (H 2 O) still present in the sample.
  • the peak at 2362 cm-1 corresponds to CO 2 present in the environment during the scanning of the sample.
  • bore water solution Quantification of CO 2 gas in exhaust of 4WD vehicle after 'trapping' with the precursor solution diluted in bore water
  • This experiment aimed at quantifying the CO 2 (carbon dioxide) levels in the emissions from a 4WD vehicle, after 'trapping' them in the bore water solution.
  • the absorbent solution is designed to consume most of the CO 2 emitted from combustion engines in a chemical reaction that takes place inside 'salty' bore water. Water from many Australian bores is high in carbonated salts eg sodium carbonate or calcium carbonate. In the absorbent solution, CO 2 from a combustion engine is bubbled through bore water to which a chemical solution was added.
  • the levels of CO 2 before and after bubbling through the absorbent solution are to be quantified.
  • the exhaust from the 4WD vehicle was connected directly to the chamber with the gas analysers.
  • the exhaust was connected to a sealed 20 L plastic container holding the mixture of bore water and the absorbent solution.
  • the plastic container itself was connected with the chamber via a hose.
  • the CO 2 levels in the 20 L container containing the bore water were measured.
  • the bore water was tested for conductivity and pH before and after
  • the bore water used had a pH of 7.5 and an electrical conductivity of 3.6 mS. After adding 100 ml of the precursor solution to the 20 L of bore water the pH rose to 11.3 and the EC measured 4.0 mS.
  • the aim of this experiment was to test the efficiency of the precursor solution in 'trapping' the CO 2 (carbon dioxide) emissions from a 4WD vehicle using seawater.
  • the previous experiment in Example 3 to quantify the levels of CO 2 before and after bubbling through the absorbent solution was repeated, but instead of salty bore water, seawater was used.
  • the gas analysers are designed to measure very small CO 2 concentration differentials typical for plant CO 2 fluxes, their detection range has a maximum of approx. 3000 ppm of CO 2 . As a combustion engine's output is much higher than 3000 ppm, we could only show how quickly the maximum reading was reached when the exhaust was attached to the chamber without running through the absorbent solution. These gas analysers, however, were very capable of detecting any CO 2 present in the sample while the reaction of carbon dioxide with the absorbent solution was taking place.
  • the exhaust was connected to a sealed 20 L plastic container holding the mixture of seawater (collected from Moreton Bay) to which 100ml of the absorbent solution was added.
  • the plastic container itself was connected with the chamber via a hose.
  • the seawater was tested for conductivity and pH before and after 'trapping' and a sample each of the water before and after treatment was sent away for a full laboratory analysis.
  • the CO 2 chamber was then connected to the container with the 20 L of seawater.
  • the seawater used had a pH of 8.28 and an electrical conductivity of 4.96 mS. After adding 100 ml of the precursor solution to the
  • FIG 20 an example of the absorbent solution of the invention in use in relation to trapping carbon dioxide from gases from a boiler 10.
  • Water is heated in the boiler 10 to generate high pressure steam whose passage in conduits 11 is shown by the arrows in full outline for activating a turbine 12 as shown.
  • the water is heated in the furnace chamber 13 as shown and emissions from the boiler through conduit 14 are passed through a fabric filter 15 to filter out any fly ash before the resulting smoke is discharged from the emission stack 16.
  • a certain amount of such emissions (e.g. 30-50%) is passed through one of containers 17A and 17B which contain the diluted absorbent solution of the invention.
  • a precipitate from the absorbent solution may be reused as required.
  • Two containers 17Aand 17B are shown one of which can be used as a changeover container as required.
  • the resulting "clean" water with carbon dioxide removed is then returned to the to the boiler as shown through conduit 18.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Treating Waste Gases (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

La présente invention concerne la formulation d'un précurseur aqueux destiné à l'absorption des gaz, y compris le dioxyde de carbone, cette formulation contenant de l'hydroxyde de calcium, de l'hydroxyde de potassium ou un autre hydroxyde de métal alcalin, et de l'eau. La formulation du précurseur peut comporter de l'hydroxyde de calcium à 5 à 20 g/l ; de l'hydroxyde de potassium ou un hydroxyde de métal alcalin à 45 à 60 g/l et facultativement du permanganate de potassium à 0,3 à 1,5 g/l. La solution précurseur est prête à l'emploi lorsqu'elle a été diluée d'un facteur de 0,5 à 5 % et qu'elle a un pH de 8,0 à 13,5.
PCT/AU2006/001238 2005-08-25 2006-08-25 Adsorbant pour gaz WO2007022595A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2005904622 2005-08-25
AU2005904622A AU2005904622A0 (en) 2005-08-25 Adsorbent for gases

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FR2924032A1 (fr) * 2007-11-27 2009-05-29 Yngve Jakobsen Dispositif pour reduire principalement le dioxyde de carbone produit par tous moteurs a combustion interne et par l'activite de l'industrie
DE102008054395A1 (de) * 2008-12-08 2010-06-17 Pacific Speed Ltd. Kohlendioxidbindungsverfahren
EP2203241A1 (fr) * 2008-10-31 2010-07-07 Calera Corporation Compositions non cimentaires comprenant des additifs séquestrant le co2
EP2203067A1 (fr) * 2008-09-30 2010-07-07 Calera Corporation Compositions et procédés utilisant des matières carbonées
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US8006446B2 (en) 2008-09-30 2011-08-30 Calera Corporation CO2-sequestering formed building materials
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US8869477B2 (en) 2008-09-30 2014-10-28 Calera Corporation Formed building materials
WO2015002523A1 (fr) * 2013-07-04 2015-01-08 Centro De Investigación En Química Aplicada Procédé et système pour obtenir un gaz non corrosif, un gaz synthétique et du soufre à partir d'un gaz naturel
US9133581B2 (en) 2008-10-31 2015-09-15 Calera Corporation Non-cementitious compositions comprising vaterite and methods thereof
US9260314B2 (en) 2007-12-28 2016-02-16 Calera Corporation Methods and systems for utilizing waste sources of metal oxides
US9533260B2 (en) 2013-07-03 2017-01-03 Centro De Investigacion En Quimica Aplicada Method and system for obtaining sweet gas, synthetic gas and sulphur from natural gas
WO2017103797A1 (fr) 2015-12-14 2017-06-22 King Abdullah University Of Science And Technology Encre à base de complexe organo-argent à conductivité élevée et stabilité de jet d'encre
JP2018530425A (ja) * 2015-08-18 2018-10-18 ユナイテッド アラブ エミレーツ ユニバーシティＵｎｉｔｅｄ Ａｒａｂ Ｅｍｉｒａｔｅｓ Ｕｎｉｖｅｒｓｉｔｙ 二酸化炭素の回収及び脱塩のための方法
WO2023187778A1 (fr) * 2022-03-28 2023-10-05 Carbon Blue Ltd. Procédé d'élimination de dioxyde de carbone

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WO2009077675A3 (fr) * 2007-11-27 2009-10-01 Yngve Jakobsen Dispositif pour reduire principalement le dioxyde de carbone produit par tous moteurs a combustion interne et par l'activite de l'industrie
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