OA17082A - Method for processing carbon dioxide contained in an exhaust gas flow. - Google Patents
Method for processing carbon dioxide contained in an exhaust gas flow. Download PDFInfo
- Publication number
- OA17082A OA17082A OA1201400381 OA17082A OA 17082 A OA17082 A OA 17082A OA 1201400381 OA1201400381 OA 1201400381 OA 17082 A OA17082 A OA 17082A
- Authority
- OA
- OAPI
- Prior art keywords
- carbon
- exhaust gas
- gas flow
- fact
- aqueous medium
- Prior art date
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- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 30
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 30
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 150000001722 carbon compounds Chemical class 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 230000003647 oxidation Effects 0.000 claims abstract description 4
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N silicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N al2o3 Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 239000007795 chemical reaction product Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000000047 product Substances 0.000 claims description 4
- 239000008262 pumice Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229920005610 lignin Polymers 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L Calcium hydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 2
- 239000000428 dust Substances 0.000 claims description 2
- 239000010881 fly ash Substances 0.000 claims description 2
- 239000006260 foam Substances 0.000 claims description 2
- 239000010451 perlite Substances 0.000 claims description 2
- 235000019362 perlite Nutrition 0.000 claims description 2
- 150000002894 organic compounds Chemical class 0.000 claims 2
- 239000000126 substance Substances 0.000 abstract description 7
- 230000005591 charge neutralization Effects 0.000 abstract description 4
- 238000006386 neutralization reaction Methods 0.000 abstract description 4
- WMWXXXSCZVGQAR-UHFFFAOYSA-N dialuminum;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3] WMWXXXSCZVGQAR-UHFFFAOYSA-N 0.000 abstract 3
- FAHBNUUHRFUEAI-UHFFFAOYSA-M Aluminium hydroxide oxide Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 abstract 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract 1
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 abstract 1
- 150000001342 alkaline earth metals Chemical class 0.000 abstract 1
- 229910001385 heavy metal Inorganic materials 0.000 abstract 1
- 229910003439 heavy metal oxide Inorganic materials 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- WNROFYMDJYEPJX-UHFFFAOYSA-K Aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 230000001264 neutralization Effects 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 230000000875 corresponding Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Inorganic materials [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002916 wood waste Substances 0.000 description 2
- 210000002356 Skeleton Anatomy 0.000 description 1
- -1 aromatic carbon compounds Chemical class 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000001139 pH measurement Methods 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The present invention relates to a method for processing carbon dioxide (CO2) contained in an exhaust gas flow (1). For the purpose of obtaining a carbon-enriched product (9) from organiccontaining substances and carbon dioxide (CO2), the exhaust gas flow (1) is brought into contact in a drying and cooling chamber (3) with a moist, porous, siliceous material and admixed aluminium hydroxide and/or aluminium oxide hydrate (4) and/or optionally a different metal oxidation means, with the generation of a basic aqueous milieu and for the destabilisation of the carbon dioxide (CO2), said exhaust gas flow being cooled in said chamber, wherein the quantity of aluminium hydroxide and/or aluminium oxide hydrate (4) to be admixed is controlled by means of an ongoing Ph value measurement (2), after wich the aqueous milieu is fed to a subsequent prechamber (5) which is charged with a material (6) carrying oxidisable alkaline earth metal and/or heavy metal, wherein a neutralisation of the aqueous milieu carrying ionised carbon occurs and formed alkaline earth metal and/or heavy metal oxide (10) is discharged from the prechamber (5) and the aqueous milieu carrying ionised carbon C is then fed to a main chamber (7) charged with material (8) consisting of organic carbon compounds and/or containing organic carbon compounds.
Description
Method for Processing Carbon Dioxide Contained in an Exhaust Gas Flow
The présent invention concems a method for processing carbon dioxide CCh contained in an exhaust gas flow to a product suitable for energy production.
This processing is achieved according to the invention in that
a) the exhaust gas flow is brought into contact in a drying and cooling chamber with a moistened, porous, silicate matériel and admixed aluminum hydroxide and/or hydrated aluminum oxide to produce a basic, aqueous medium and to destabilize carbon dioxide CCh and then cooled, the mixture of aluminum hydroxide and/or hydrated aluminum oxide to be added being controlled by continuous pH value measurement,
b) the aqueous medium is fed to a subséquent prechamber, which is supplied with oxidizable material containing allcaline earth and/or heavy métal, in which oxidation of allcaline earth and/or heavy métal occurs with accompanying neutre! ization of the aqueous medium containing ionized carbon and formed allcaline earth and/or heavy métal oxide is discharged from the prechamber, in which oxidizable material containing alkaline earth and/or heavy meta) is simultaneously supplied as a function of continuous measuremenL and
c) the aqueous medium containing ionized carbon C is then fed to a main chamber equipped with material consisting of organic carbon compounds and/or containing organic carbon compounds, in which polyreactions occur with organic carbon compounds with participation of ionized carbon C to form a carbon-enriched product
The invention is further explained below with reference to the drawing in which Figure 1 shows a flow chart according to the invention of a method for processing of carbon dioxide CCh contained in an exhaust gas flow by means of a three-chamber system to a product suitable for energy production and Figure 2a shows the average initial content of 02 [sic, Ch] and CO2 [sic, CO2] of the exhaust gas flow being processed, Figure 2b shows the average content of 02 [sic, O2] and CO2 [sic, CO2] at the output of the supply chamber apparent from the flow chart according to Figure 1 and Figure 2c shows the average content of 02 [sic, O2] and CO2 [sic, CO2] at the output of the main chamber apparent from the flow chart according to Figure 1, in each case over a measurement period of 3 days.
It is initially stated that the individual components of the employed materials and the medium présent in the corresponding process steps are subject to continuous measurement 2 during the entîre process, in which case material feed to the corresponding process chambers is controlled, as required or as a function of measurement results. For example, the amount of aluminum hydroxide and/or hydrated aluminum oxide to be added is controlled via a continuous pH measurement 2.
In this case the exhaust gas flow 1, for example, crude gas from an incinerator, usually with a pH value of about 4 and with a température in the range from 150 to 170°C, in modem încinerators below 150°C, during passage through a drying and cooling chamber 3 optionally consisting of several chamber units, which is supplied with moistened, silicate, porous material and admixed aluminum hydroxide and/or hydrated aluminum oxide 4 and/or other métal oxidizers, is cooled to a température of30-50°C, in which case a basic, aqueous medium is generated and the contained carbon dioxide CO2 is destabilized. The moistened, silicate, porous material 4 is pumice, foam lava and/or perlite in granulated form with a moisture content of 15 to 30% referred to the total dry weight of the silicate material 4. The moistened, silicate, porous material 4 is then dried or its moisture absorbed by exhaust gas flow 1 so that it is cooled. The aqueous medium generated in the drying and cooling chamber 3 is brought to a pH value between 10 and 13 by means of aluminum hydroxide and/or hydrated aluminum oxide. The aqueous medium formed in the drying and cooling chamber 3, in which the destabilized carbon dioxide CO2 présent in ionïzed form is contained, is fed to a subséquent prechamber 5, which is supplied material containing oxidizable alkaline earth and/or heavy métal, in which case oxidation of alkaline earth and/or heavy métal 6 occurs with accompanying neutralization of the aqueous medium containing ionîzed carbon C. The oxidizable material 6 containing alkaline earth métal, preferably calcium and/or heavy métal is used în fine-granular form as métal, for example, Fe dust, fly ash, hydrated lime, etc. An alkaline earth and/or heavy métal oxide 10 formed during neutralization is discharged subsequently as byproducts from prechamber 5, in which case oxidizable material 6 containing alkaline earth and/or heavy métal is supplied as a function of continuous measurements 2. Following prechamber 5, the medium ordinarily has a pH value of
6. The aqueous medium containing ionized carbon C is then fed to a main chamber 7 equipped with a material 8 consisting of organic carbon compounds and/or containing organic carbon compounds, in which the material 8 can be lignin, lignin dérivatives, recovered paper stock and/or plastic materials, pulp or waste substances, etc. With participation of ionized carbon C polyreactions (chain lengthenîng) with organic carbon compounds occurs to form a carbonenriched end product 9. The polyreactions occurring in the main chamber 7 occur at températures between 5 and 80°C, preferably between 30-60°C and especially 40-45°C and under a pressure between 0.1 and 10 bar, preferably between 0.1 and 0.7 bar or 5 to 8 bar.
A température control arranged in the drying and cooling chamber 3 serves to separate the substances into the corresponding substance-specific state (solid, liquid, gas) in order to produce new compounds.
It is generally observed that under pressure the addition process of carbon C to the moistened silicate porous material 4 occurs more quîckly and significantly greater addition also occurs. Moreover, additional substance mixtures can be fed to main chamber 7 as reaction accelerators in order to configure the reaction capacity of the substances and the températures in the main chamber 7 so that optimal processing of the carbon dioxide CCh contained in the exhaust gas flow I occurs and a C-enriched end product 9 is formed.
The method according to the invention is further explaîned by means of a preferred practical example.
Wood waste is used as raw material source for the exhaust gas flow. The crude gas originating from incinération of ground wood waste, shows an average content of O2 between 11.5 and 14 vol% and a CO2 content between 7 and 9 vol%, is fed to a drying and cooling chamber with a température of about 150°C, in which the exhaust gas flow is cooled to a température of <40°C, preferably about 30°C and which is supplied with pumice as porous silicate material with a moisture content to 60%, referred to the dry weight, with admixed aluminum hydroxidc and/or hydrated oxide, said aluminum compounds occurring during KOH production. The exhaust gas flow absorbs the moisture of the pumice, in which case the exhaust gas flow is cooled. At the same time an aqueous medium is generated in the drying and cooling chamber to form a stable suspension of aluminum compounds in water. In the aqueous medium, which has a pH value of roughly neutral to more strongly basîc, pH 10 to 13, the carbon dioxide (CCh) contained in it is ionized and destabilized, in which the aqueous medium is cooled to a température between 12 and 13°C up to its output from the drying and cooling chamber.
The aqueous medium is sent from the drying and cooling chamber to a downline prechamber, which is supplied with iron shavings as oxidizable material, in which the ratio of oxidizable material to liquid of the aqueous medium is about 1:7 wt%. The iron shavings are oxidîzed during simultaneous neutralization of the prechamber medium by the oxygen coming from the ionized and destabilized carbon dioxide. At the output ofthe prechamber the aqueous medium has an average Ch content of about 16-17 vol% and a CO2 content of about 3.5-4 vol% and a pH 15 value of about 6.
For further treatment the aqueous medium containing carbon is sent to a main chamber, which is equipped with materials containing organic carbon compounds. Recovered paper stock containing lîgnin is preferably used here, which can be equally replaced by any plastic materials, 20 pulp and/or waste substances containing alîphatic and/or aromatic carbon compounds. With participation ofthe ionized carbon-containing aqueous medium, polyreactions occur in the main chamber along with polymerizations and polycondensations with the organic with the organic carbon compounds ofthe recovered paper stock situated in it to form a carbon-enriched end product, which has a silicate fraction of about 20-25 vol% as support skeleton. The polyreaction 25 in the main chamber preferably occurs at a température between 40 and 45°C under a pressure of to 8 bar. Under these pressure and température conditions the silicate fraction ofthe carbonrich end product is fînally also separable, which represents a basic raw material that can be used in a variety ofways. Through this processing ofthe exhaust gas flow a pure gas is fînally achîeved at the output from the main chamber, which has an average O2 content of 22 vol% and 30 a CO2 content of 0.2 vol%.
s
By continuous measurement ofthe individual process parameters, like pressure, température, material amounts and compositions in the individual process steps optîmtzation of the process and resuit ts guaranteed.
Claims (8)
- Claims:Method for processing of carbon dioxide (CO
- 2) contained în an exhaust gas flow (1) to a product suitable for energy production, characterized by the fact thata) the exhaust gas flow (1) is brought in contact in a drying and cooling chamber (
- 3) with a moistened porous silicate material and an admixed aluminum hydroxtde and/or hydrated aluminum oxide (4) and/or optionally other meta! oxidizers to form a basic aqueous medium and to destabilize carbon dioxide (CO2) and cooled, in which the amount of aluminum hydroxtde and/or hydrated aluminum oxide (4) to be added is control led via a continuous pH value measurement (2),b) the aqueous medium is fed to a subséquent prechamber (5), which is supplied with material containing oxidizable alkaline earth and/or heavy métal (6), in which oxidation of alkaline earth and/or heavy métal (6) occurs with accompanying neutre! ization of the aqueous medium containing ionized carbon and the formed alkaline earth and/or heavy meta! oxide (10) formed as a resuit is discharged from the prechamber (5), in which material (6) containing oxidizable alkaline earth and/or heavy meta! is simultaneously supplied as a function of continuous measurement (2) andc) the aqueous medium containing ionized carbon (C) is then fed to a main chamber (7) supplied with material (8) consisting of organic carbon compounds and/or containing organic carbon compounds, in which polyreactions with organic carbon compounds occur with participation of the ionized carbon (C) to form a carbon-enriched end product (9).Method according to claim 1, characterized by the fact that pumice, foam lava and/or perlite in granular form with a moisture content of 15-30% referred to the dry total weight of the silicate material (4) is used as moistened, porous silicate material (4).Method according to claim 1, characterized by the fact that the exhaust gas flow (1) entering the drying and cooling chamber (3) is cooled to 30-50°C.
- 4. Method according to claim 1, characterized by the fact that the aqueous medium generated in the drying and cooling chamber (3) is brought to a pH value between 10 and13.
- 5. Method according to claim 1, characterized by the fact that material (
- 6) containing oxidizable alkalîne earth and/or heavy métal is used in fine granular form as métal, for example, Fe dust, fly ash, hydrated lime.10 6. Method according to claim 1, characterized by the fact that Iignin, lignin dérivative, recovered paper stock and/or plastic materials are used as material (8) in the main chamber consisting of organic compounds and/or containing organic compounds.
- 7. Method according to claim I, characterized by the fact that the polyreactîons in the main15 chamber (7) occur at températures between 5 and 80°C.
- 8. Method according to daim I, characterized by the fact that the polyreactîon in the main chamber (7) occurs under a pressure between 9.8 and 196 kPa.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA204/2012 | 2012-02-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| OA17082A true OA17082A (en) | 2016-03-23 |
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