CN115838253B - Eutectic solvent, preparation method and application thereof - Google Patents
Eutectic solvent, preparation method and application thereof Download PDFInfo
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- CN115838253B CN115838253B CN202211581331.XA CN202211581331A CN115838253B CN 115838253 B CN115838253 B CN 115838253B CN 202211581331 A CN202211581331 A CN 202211581331A CN 115838253 B CN115838253 B CN 115838253B
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- 239000002904 solvent Substances 0.000 title claims abstract description 81
- 230000005496 eutectics Effects 0.000 title claims abstract description 67
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000001257 hydrogen Substances 0.000 claims abstract description 67
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 67
- 239000000463 material Substances 0.000 claims abstract description 38
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims abstract description 36
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 30
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000004566 building material Substances 0.000 claims abstract description 20
- 235000005074 zinc chloride Nutrition 0.000 claims abstract description 18
- 239000011592 zinc chloride Substances 0.000 claims abstract description 18
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000004202 carbamide Substances 0.000 claims abstract description 10
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims abstract description 8
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims abstract description 4
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 47
- 229910052799 carbon Inorganic materials 0.000 claims description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 238000002156 mixing Methods 0.000 claims description 22
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 15
- 235000012241 calcium silicate Nutrition 0.000 claims description 15
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 claims description 15
- 239000008367 deionised water Substances 0.000 claims description 12
- 229910021641 deionized water Inorganic materials 0.000 claims description 12
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 10
- 229910021534 tricalcium silicate Inorganic materials 0.000 claims description 10
- 235000019976 tricalcium silicate Nutrition 0.000 claims description 10
- ARHMMDOXGIIARL-UHFFFAOYSA-N calcium;dihydroxy(dioxido)silane Chemical compound [Ca+2].O[Si](O)([O-])[O-] ARHMMDOXGIIARL-UHFFFAOYSA-N 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000004575 stone Substances 0.000 abstract description 55
- 238000003763 carbonization Methods 0.000 abstract description 39
- 239000000654 additive Substances 0.000 abstract description 31
- 230000000996 additive effect Effects 0.000 abstract description 31
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 26
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 13
- 239000001569 carbon dioxide Substances 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 13
- 231100000252 nontoxic Toxicity 0.000 abstract description 2
- 230000003000 nontoxic effect Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 58
- 239000003469 silicate cement Substances 0.000 description 23
- 239000000370 acceptor Substances 0.000 description 22
- 239000007787 solid Substances 0.000 description 14
- 239000007864 aqueous solution Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- 239000011259 mixed solution Substances 0.000 description 7
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000002893 slag Substances 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 125000000962 organic group Chemical group 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- AGWMJKGGLUJAPB-UHFFFAOYSA-N aluminum;dicalcium;iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Ca+2].[Ca+2].[Fe+3] AGWMJKGGLUJAPB-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- HOOWDPSAHIOHCC-UHFFFAOYSA-N dialuminum tricalcium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[Al+3].[Al+3].[Ca++].[Ca++].[Ca++] HOOWDPSAHIOHCC-UHFFFAOYSA-N 0.000 description 2
- 239000012154 double-distilled water Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 229910001410 inorganic ion Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
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- 239000000126 substance Substances 0.000 description 2
- 229910021642 ultra pure water Inorganic materials 0.000 description 2
- 239000012498 ultrapure water Substances 0.000 description 2
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 125000000524 functional group Chemical group 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
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- 231100000419 toxicity Toxicity 0.000 description 1
Landscapes
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
The invention provides a eutectic solvent, a preparation method and application thereof. The eutectic solvent comprises a hydrogen bond donor and a hydrogen bond acceptor, the hydrogen bond acceptor comprises a first component and a second component, the first component comprises zinc chloride, the second component comprises any one or more of urea, ethylenediamine tetraacetic acid or cetyltrimethylammonium bromide, and the hydrogen bond donor comprises ethylene glycol and/or isopropanol. The eutectic solvent can be used as an additive to be added into silicate cementing materials to prepare the carbon-fixing stone, the carbon dioxide capturing amount and carbonization rate of the carbon-fixing stone are obviously improved, the carbonized carbon-fixing stone can be used as a building material product, and the method has good application prospect, and the whole preparation process is nontoxic, environment-friendly, low in cost, simple and feasible.
Description
Technical Field
The invention relates to the technical field of carbon dioxide capture, in particular to a eutectic solvent, a preparation method and application thereof.
Background
In recent years, CO 2 The emission amount is rapidly increased, and the emission amount is used as a greenhouse gas, and excessive emission is easy to cause greenhouse effect, so that the problems of disastrous climate change, sea level rise and the like are caused. On the other hand, the CCUS (Carbon Capture, utilization and Storage), which is a proposal of Carbon Capture, utilization and sequestration, has made higher demands on Carbon emission control from economic and social developments, and thus Carbon dioxide emission reduction actions have been forced to be performedEyebrows and eyelashes.
In addition, the discharge amount of a large amount of solid wastes (such as steel slag or construction waste) in the steel, metallurgy or construction industry is increased year by year, and the direct discharge of the wastes not only wastes land resources, but also causes serious pollution to the environment and water body. Studies show that the substances with the main components of dicalcium silicate or tricalcium silicate in the solid wastes can be calcined into silicate cementing materials, and the silicate cementing materials are used as building materials after carbon maintenance through carbon dioxide absorption. However, the single silicate gel material has low carbon dioxide absorption capacity, and in order to improve the carbon fixation capacity, the silicate gel material is generally realized by adding an additive, and the conventional additive (such as ammonium nitrate) has the defects of toxicity and odor irritation, and has limited carbon dioxide absorption capacity improvement.
The eutectic solvent is used as a eutectic mixture with a low melting point, and is formed by hydrogen bond interaction between a Hydrogen Bond Acceptor (HBA) and a Hydrogen Bond Donor (HBD) in a certain molar ratio, so that the eutectic solvent has a good capture effect on carbon dioxide. However, it has not been reported to be mixed with silicate gel materials as an additive to increase the carbon fixation of silicate gel materials.
Disclosure of Invention
In view of the above, the present invention is directed to a eutectic solvent, a preparation method and application thereof. The carbon-fixing stone can be obtained by adopting the eutectic solvent as an additive and adding the eutectic solvent into silicate gel materials, has higher carbon-fixing amount and carbonization strength, and can be used as a building material product after carbonization.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a eutectic solvent comprising a hydrogen bond donor and a hydrogen bond acceptor, the hydrogen bond acceptor comprising a first component comprising zinc chloride and a second component comprising any one or more of urea, ethylenediamine tetraacetic acid or cetyltrimethylammonium bromide; the hydrogen bond donor includes ethylene glycol and/or isopropanol.
Preferably, the mass ratio of the first component to the second component is (1-7): 3-5.
Preferably, the mass ratio of the hydrogen bond acceptor to the hydrogen bond donor is 1 (2-5).
In a second aspect, the present invention provides a method for preparing the above eutectic solvent, comprising the steps of:
(1) Mixing the solution of the first component with the second component to obtain a hydrogen bond acceptor solution;
(2) And mixing the hydrogen bond acceptor solution with the hydrogen bond donor solution to obtain the eutectic solvent.
Preferably, the solvent of the solution of the first component comprises deionized water.
Preferably, the hydrogen bond donor solution is prepared by mixing a hydrogen bond donor with a solvent at 0-5 ℃ and then standing for 10-30 min at 5-15 ℃.
Preferably, the solvent comprises deionized water.
In a third aspect, the present invention provides a building material product comprising the eutectic solvent according to the above technical scheme.
In a fourth aspect, the present invention provides a method for preparing the building material product, comprising the steps of:
and mixing the eutectic solvent with silicate gel material, pressing and forming, and then carrying out carbon curing to obtain the building material product.
Preferably, the mass ratio of the eutectic solvent to the silicate cementing material is (0.12-0.18): 1.
Preferably, the silicate cement comprises any one or more of monocalcium silicate, dicalcium silicate, tricalcium aluminate or tetracalcium aluminoferrite.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention provides a eutectic solvent which can be used as an additive to be added into silicate cementing materials to prepare the carbon-fixing stone, the carbon dioxide capturing amount and carbonization rate of the carbon-fixing stone are obviously improved, the carbonized carbon-fixing stone can be used as a building material product, and the eutectic solvent has good application prospect, and the whole preparation process is nontoxic, environment-friendly, low in cost, simple and feasible;
(2) The eutectic solvent has good stability and has the advantages of high storage resistance and high controllability in industry.
Drawings
FIG. 1 is an external view of a carbon-fixed stone product obtained by using a eutectic solvent as an additive in example 1;
FIG. 2 is an external view of a carbon-fixed stone product obtained by using pure water as an additive in example 1;
FIG. 3 is an external view showing a carbon-fixed stone product obtained by using the eutectic solvent as an additive in comparative example 4.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Aiming at the condition that the absorption amount of a single silicate cementing material to carbon dioxide is low in the prior art, the invention provides a eutectic solvent which comprises a hydrogen bond acceptor and a hydrogen bond donor. It should be noted that, in the present invention, the eutectic solvent is used to mix with the silicate gel material to obtain a carbon-fixing stone product, unlike the prior art that the eutectic solvent is directly used to absorb carbon dioxide, the obtained carbon-fixing stone product needs to have a flat appearance and no slag falling phenomenon, so that the subsequent carbon-fixing stone product can be ensured to pass through the carbon curing stage to prepare the building material product. Thus, the present invention has specific requirements for the choice of hydrogen bond acceptors and hydrogen bond donors in the eutectic solvent. In the present invention, the hydrogen bond acceptor comprises a first component comprising zinc chloride and a second component comprising any one or more of urea, ethylenediamine tetraacetic acid or cetyltrimethylammonium bromide; wherein the second component is used for capturing CO by chemical absorption method by using solution containing organic functional group 2 While the second component may act as a bufferImproving the uniformity of mixing of the first component and the hydrogen bond donor. The mass ratio of the first component to the second component is (1-7): 3-5, preferably (1-6): 3-4. The hydrogen bond donor includes ethylene glycol and/or isopropanol, preferably ethylene glycol. In the present invention, the mass ratio of the hydrogen bond acceptor to the hydrogen bond donor is 1 (2-5), preferably 1 (2-4).
The eutectic solvent provided by the invention can be used as an additive to be mixed with silicate gel materials to prepare a carbon-fixing stone product with high carbon-fixing amount and carbonization rate.
The invention also provides a preparation method of the eutectic solvent, which comprises the following steps:
(1) Mixing the solution of the first component with the second component to obtain a hydrogen bond acceptor solution;
(2) And mixing the hydrogen bond acceptor solution with the hydrogen bond donor solution to obtain the eutectic solvent.
According to the invention, a solution of the first component and the second component are first mixed to obtain a hydrogen bond acceptor solution. In the present invention, the solvent of the solution of the first component is water, preferably including any one of deionized water, ultrapure water, or double distilled water. The concentration of the solution of the first component is preferably 0.1 to 0.6mol/L, more preferably 0.4 to 0.6mol/L, and the amount of the second component added is 2 to 5g. In a specific embodiment of the invention, the solution of the first component is zinc chloride solution and the second component is urea. The hydrogen bond donor solution is obtained by mixing a hydrogen bond donor with a solvent, preferably mixing the hydrogen bond donor with the solvent at 0-5 ℃ to ensure uniform mixing of the components, if the solvent is too low in temperature, the organic groups are not fully contacted with inorganic ions, a eutectic can not be formed, and if the solvent is too high in temperature, the organic groups are quickly agglomerated, so that the production of the effective eutectic is reduced. The solvent is water, preferably including any one of deionized water, ultrapure water, or double distilled water. The volume ratio of the hydrogen bond donor to the solvent is 1 (0.8-1.5), preferably 1:1. In order to form a stable eutectic of the organic group and the inorganic ion, the mixed solution of the hydrogen bond donor and the solvent is required to be kept stand for 10-30 min at 5-15 ℃ after the mixed solution of the hydrogen bond donor and the solvent is obtained. In one embodiment of the invention, the hydrogen bond donor solution is obtained by diluting ethylene glycol with an equal volume of deionized water and then standing. After the hydrogen bond acceptor solution and the hydrogen bond donor solution are obtained, the hydrogen bond acceptor solution and the hydrogen bond donor solution are mixed uniformly in proportion, the mixing is preferably carried out under the condition of stirring, and after the mixed solution of the hydrogen bond acceptor solution and the hydrogen bond donor solution reaches room temperature, the eutectic solvent is obtained after standing. In a specific embodiment of the invention, the solution of the hydrogen bond acceptor and the solution of the hydrogen bond donor are uniformly mixed according to the mass ratio of 1:2-1:5, and the solution is continuously stirred until the room temperature is reached, and then the solution is kept stand for 20-40 min, so that the eutectic solvent is obtained.
The invention also provides a building material product, which comprises the raw materials of the eutectic solvent related to the technical scheme.
The invention also provides a preparation method of the building material product, which comprises the following steps:
and mixing the eutectic solvent with silicate gel material, pressing and forming, and then carrying out carbon curing to obtain the building material product.
In the present invention, the silicate binder comprises any one or more of monocalcium silicate, dicalcium silicate, tricalcium aluminate or tetracalcium aluminoferrite. In order to ensure that the mixture of the eutectic solvent and the silicate binder can be molded by pressing, the mass ratio of the eutectic solvent to the silicate binder is preferably controlled to be (0.12-0.18): 1, more preferably (0.15-0.18): 1. The method of carbon maintenance is not particularly limited, and may be carried out according to conventional technical means well known to those skilled in the art. In the invention, the product obtained by mixing and pressing the eutectic solvent and the silicate cementing material is preferably placed in a carbonization tank, maintained for 1-5 min under 15-25 MPa, more preferably maintained for 2min under 20MPa, and then placed in CO with the air pressure of 0.1-0.3 MPa 2 Curing for 30-48 h in atmosphere, more preferably CO under a pressure of 0.1MPa 2 Curing for 48 hours in the atmosphere to obtain the building material product.
According to the invention, the eutectic solvent and the silicate cementing material are mixed and then pressed to form, so that the carbon-fixing stone sample is obtained. The carbon-fixing stone sample has higher carbon dioxide capturing amount, can absorb more carbon dioxide in the carbon maintenance process, can effectively avoid excessive emission of carbon dioxide, and the building material product prepared after carbonization can be put into practical use.
In order to further illustrate the present invention, the following examples are provided. The experimental materials used in the following examples of the present invention are commercially available or prepared according to conventional preparation methods well known to those skilled in the art.
Example 1
The embodiment provides a eutectic solvent, and the preparation method thereof is as follows:
preparing 100mL of zinc chloride aqueous solution with the concentration of 0.5mol/L, adding 4g of urea solid into the zinc chloride aqueous solution, and uniformly stirring to obtain a mixed solution serving as a mixed Hydrogen Bond Acceptor (HBA); 20mL of ethylene glycol was diluted with an equal volume of deionized water at 2deg.C and allowed to stand at 10deg.C for 15min as a Hydrogen Bond Donor (HBD); and uniformly mixing the HBA solution and the low-temperature HBD solution in a mass ratio of 1:2, continuously stirring until the solution reaches room temperature, and standing for 30min to obtain the eutectic solvent additive.
2 parts of 500g tricalcium silicate cement dry materials are weighed, mixed and ground with pure water and eutectic solvent additive solution respectively according to a water-solid ratio of 0.15, and then pressed and molded, so that 2 groups of carbon-fixing stone samples are obtained. The blank control group is a carbon-fixing stone sample formed by pressing water and tricalcium silicate cement dry materials. The appearance of the 2 groups of carbon-fixing stone samples is smooth and uniform, and as shown in fig. 1 and 2, no slag drop phenomenon exists. Weighing a carbon-fixing stone sample (the mass is recorded as m1 at the moment), placing the sample into a carbonization tank, maintaining the pressure for 2min under 20MPa, and then introducing CO with the air pressure of 0.1MPa 2 And taking out and weighing after maintaining for 48 hours, wherein the mass is denoted as m2, drying the carbon-fixing stone sample in a drying oven at 105 ℃ for 6 hours, and weighing, wherein the mass is denoted as m3.
The carbon fixation (Ct) of the carbon-fixation stone sample was calculated according to the following formula:
as a result, it was found that the carbon fixation amount of the sample of the carbon-fixed stone pressed and formed with the tricalcium silicate cement dry material by using the eutectic solvent as the additive was 0.192g/g, the carbonization degree was 36.4%, and both the carbon fixation amount and the carbonization degree of the carbon-fixed stone were remarkably improved as compared with the blank control group (the carbon fixation amount was 0.153g/g, the carbonization degree was 21.0%).
Example 2
The embodiment provides a eutectic solvent, and the preparation method thereof is as follows:
preparing 100mL of zinc chloride aqueous solution with the concentration of 0.1mol/L, adding 5g of urea solid into the zinc chloride aqueous solution, and uniformly stirring to obtain a mixed solution serving as a mixed Hydrogen Bond Acceptor (HBA); 20mL of ethylene glycol was diluted with an equal volume of deionized water at 5℃and allowed to stand at 8℃for 10min as Hydrogen Bond Donor (HBD); and uniformly mixing the HBA solution and the low-temperature HBD solution in a mass ratio of 1:3, continuously stirring until the solution reaches room temperature, and standing for 20min to obtain the eutectic solvent additive.
2 parts of dicalcium silicate cement dry materials of 500g are weighed, mixed and ground with pure water and eutectic solvent additive solution according to a water-solid ratio of 0.17 respectively, and then pressed and molded to obtain 2 groups of carbon-fixing stone samples. The blank control group is a carbon-fixing stone sample formed by pressing water and tricalcium silicate cement dry materials. The resulting sample of fixed carbon stone was then carbonized, the specific method of carbonization being referred to in example 1.
As a result, it was found that the carbon fixation amount of the sample of the carbon-fixed stone pressed with the tricalcium silicate cement dry material by using the eutectic solvent as the additive was 0.257g/g, the carbonization degree was 33.6%, and both the carbon fixation amount and the carbonization degree of the carbon-fixed stone were remarkably improved as compared with the blank control group (the carbon fixation amount was 0.161g/g, the carbonization degree was 17.9%).
Example 3
This example provides a eutectic solvent differing from example 2 only in that the concentration of the zinc chloride aqueous solution is 0.2mol/L, and other parameters and steps remain the same as in example 2.
500g of dicalcium silicate cement dry material is weighed, mixed with the obtained eutectic solvent additive solution at a water-solid ratio of 0.17, ground and pressed to form, a carbon-fixing stone sample is obtained, and carbonization is carried out, wherein the specific method of carbonization is as described in example 1.
As a result, it was found that the carbon fixation amount of the sample of the carbon-fixed stone pressed with the tricalcium silicate cement dry material using the eutectic solvent as an additive was 0.299g/g, and the degree of carbonization was 40.9%.
Example 4
This example provides a eutectic solvent differing from example 2 only in that the concentration of the zinc chloride aqueous solution is 0.3mol/L, and other parameters and steps remain the same as in example 2.
500g of dicalcium silicate cement dry material is weighed, mixed with the obtained eutectic solvent additive solution at a water-solid ratio of 0.17, ground and pressed to form, a carbon-fixing stone sample is obtained, and carbonization is carried out, wherein the specific method of carbonization is as described in example 1.
As a result, it was found that the carbon fixation amount of the sample of the carbon-fixed stone pressed with the tricalcium silicate cement dry material using the eutectic solvent as an additive was 0.310g/g, and the degree of carbonization was 45.3%.
As is clear from the data of examples 2 to 4, the carbon fixation amount and the carbonization degree of the carbon fixation stone sample gradually increased as the addition amount of zinc chloride increased.
Example 5
The embodiment provides a eutectic solvent, and the preparation method thereof is as follows:
preparing 100mL of zinc chloride aqueous solution with the concentration of 0.5mol/L, adding 4g of urea solid into the zinc chloride aqueous solution, and uniformly stirring to obtain a mixed solution serving as a mixed Hydrogen Bond Acceptor (HBA); 20mL of ethylene glycol was diluted with an equal volume of deionized water at 2deg.C and allowed to stand at 10deg.C for 15min as a Hydrogen Bond Donor (HBD); and uniformly mixing the HBA solution and the low-temperature HBD solution in a mass ratio of 1:2, continuously stirring until the solution reaches room temperature, and standing for 30min to obtain the eutectic solvent additive.
2 parts of 500g of monocalcium silicate cement dry materials are weighed, mixed and ground with pure water and eutectic solvent additive solution according to a water-solid ratio of 0.15 respectively, and then pressed and molded, so that 2 groups of carbon-fixing stone samples are obtained. The blank control group is a carbon-fixing stone sample formed by pressing water and monocalcium silicate cement dry materials. The resulting sample of fixed carbon stone was then carbonized, the specific method of carbonization being referred to in example 1.
As a result, it was found that the carbon fixation amount of the sample of the carbon-fixed stone pressed with the monocalcium silicate cement drier by using the eutectic solvent as the additive was 0.189g/g, the carbonization degree was 37.0%, and both the carbon fixation amount and the carbonization degree of the carbon-fixed stone were remarkably improved as compared with the blank (carbon fixation amount was 0.142g/g, carbonization degree was 19.9%).
Comparative example 1
The comparative example provides a single component HBA admixture, which is prepared as follows:
100mL of zinc chloride solution with the concentration of 0.2mol/L is prepared, 4g of urea solid is added into the zinc chloride solution, and the mixture is stirred uniformly to obtain HBA additive solution.
2 parts of dicalcium silicate cement dry materials of 500g are weighed, mixed with pure water and HBA additive solution respectively according to a water-solid ratio of 0.15, ground and pressed to form, and 2 groups of carbon-fixing stone samples are obtained. The blank control group is a fixed carbon stone sample formed by pressing water and dicalcium silicate cement drier. The resulting sample of fixed carbon stone was then carbonized, the specific method of carbonization being referred to in example 1.
As a result, it was found that the carbon fixation amount of the single-component HBA admixture and the dicalcium silicate cement drier pressed-molded carbon fixation stone sample was 0.129g/g, the carbonization degree was 19.8%, and compared with the blank control group (carbon fixation amount was 0.134g/g, carbonization degree was 20.5%), it was shown that the addition of the single-component hydrogen bond donor solvent admixture had no significant effect on the carbon fixation amount and carbonization degree of the carbon fixation stone sample.
Comparative example 2
The comparative example provides a single component HBD admixture, which was prepared as follows:
20mL of ethylene glycol was diluted with an equal volume of deionized water at 2℃and allowed to stand at 10℃for 15min to give an HBD admixture solution.
2 parts of dicalcium silicate cement dry materials of 500g are weighed, mixed with pure water and HBD additive solution respectively according to a water-solid ratio of 0.15, ground and pressed to form, and 2 groups of carbon-fixing stone samples are obtained. The blank control group is a fixed carbon stone sample formed by pressing water and dicalcium silicate cement drier. The resulting sample of fixed carbon stone was then carbonized, the specific method of carbonization being referred to in example 1.
As a result, it was found that the carbon fixation amount of the single-component HBD admixture and the dicalcium silicate cement drier pressed-molded carbon fixation stone sample was 0.137g/g, the carbonization degree was 19.7%, and compared with the blank control group (carbon fixation amount was 0.141g/g, carbonization degree was 19.5%), it was shown that the addition of the single-component hydrogen bond acceptor solvent admixture had no significant effect on the carbon fixation amount and carbonization degree of the carbon fixation stone sample.
Comparative example 3
The comparative example uses ammonium nitrate as an additive to prepare the carbon-fixing stone, and the preparation method is as follows:
100mL of ammonium nitrate solution with the concentration of 0.2mol/L is prepared, 500g of dicalcium silicate cement dry material is respectively mixed with pure water and the ammonium nitrate solution at the water-solid ratio of 0.15, ground and pressed to form, a carbon-fixing stone sample is obtained, and carbonization is carried out, wherein the specific method of carbonization is as described in example 1.
As a result, it was found that the carbon fixation amount of the sample of the carbon fixation stone pressed and formed by using the ammonium nitrate solution as the additive and the dicalcium silicate cement drier was 0.155g/g, the carbonization degree was 26.9%, and compared with the blank control group (the carbon fixation amount was 0.146g/g, the carbonization degree was 20.8%), indicating that the addition of the ammonium nitrate solution additive had no significant effect on the carbon fixation amount and the carbonization degree of the sample of the carbon fixation stone.
Comparative example 4
This comparative example provides a eutectic solvent, which is prepared as follows:
preparing 100mL of zinc chloride aqueous solution with the concentration of 0.5mol/L, adding 4g of urea solid into the zinc chloride aqueous solution, and uniformly stirring to obtain a mixed solution serving as a mixed Hydrogen Bond Acceptor (HBA); 20mL of isopropanolamine was diluted with an equal volume of deionized water at 2deg.C and allowed to stand at 10deg.C for 15min as a Hydrogen Bond Donor (HBD); and uniformly mixing the HBA solution and the low-temperature HBD solution in a mass ratio of 1:2, continuously stirring until the solution reaches room temperature, and standing for 30min to obtain the eutectic solvent additive.
Weighing 500g of tricalcium silicate cement dry material, mixing and grinding with eutectic solvent additive solution at a water-solid ratio of 0.15, and then compacting to obtain a carbon-fixing stone sample. As a result, the obtained carbon-fixed stone sample was found to exhibit cracking and slag removal phenomena, as shown in FIG. 3.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A building material product is characterized by being prepared from a eutectic solvent and silicate cementing material;
the eutectic solvent includes a hydrogen bond donor and a hydrogen bond acceptor;
the hydrogen bond acceptor comprises a first component and a second component, the first component comprises zinc chloride, and the second component comprises any one or more of urea, ethylenediamine tetraacetic acid or cetyltrimethylammonium bromide;
the hydrogen bond donor includes ethylene glycol and/or isopropanol;
the mass ratio of the first component to the second component is (1-7): 3-5;
the mass ratio of the hydrogen bond acceptor to the hydrogen bond donor is 1 (2-5).
2. The building material product of claim 1, wherein the eutectic solvent is prepared by:
(1) Mixing the solution of the first component with the second component to obtain a hydrogen bond acceptor solution;
(2) And mixing the hydrogen bond acceptor solution with the hydrogen bond donor solution to obtain the eutectic solvent.
3. The building material product of claim 2, wherein the solvent of the solution of the first component comprises deionized water.
4. The building material product according to claim 2, wherein the hydrogen bond donor solution is prepared by mixing a hydrogen bond donor with a solvent at 0-5 ℃ and then standing at 5-15 ℃ for 10-30 min.
5. The building material product of claim 4, wherein the solvent comprises deionized water.
6. A method of making a building material product according to any one of claims 1 to 5, comprising the steps of:
and mixing the eutectic solvent with silicate gel material, pressing and forming, and then carrying out carbon curing to obtain the building material product.
7. The preparation method of claim 6, wherein the mass ratio of the eutectic solvent to the silicate cementing material is (0.12-0.18): 1.
8. The method of making according to claim 6, wherein the silicate gelling material comprises any one or more of monocalcium silicate, dicalcium silicate, or tricalcium silicate.
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