Demonstration method for carbon dioxide absorption and apparatus for demonstrating carbon dioxide absorption

Abstract

An object of the present invention is to provide a method for demonstrating carbon dioxide absorption capable of visualizing a phenomenon in which carbon dioxide is absorbed by concrete or mortar, and an apparatus for demonstrating carbon dioxide absorption. 【Solution means】The method for demonstrating carbon dioxide absorption according to the present invention uses a container including a main body having an opening and a cap configured to be able to open and close the opening, and includes a charging step of charging concrete or mortar into the main body from the opening, a supply step of supplying carbon dioxide into the main body from the opening after the charging step, and a plugging step of attaching the cap to the opening and plugging the opening after the supply step. As carbon dioxide is absorbed by the concrete or mortar in the main body, the main body collapses, and the concrete or mortar is granular material obtained by pulverizing a concrete hardened body or a mortar hardened body, and a minimum value of a particle diameter of the granular material is 0.15 mm or more.

Description

Technical Field

[0001] The present invention relates to a method for demonstrating carbon dioxide absorption and an apparatus for demonstrating carbon dioxide absorption.

Background Art

[0002] In recent years, in order to reduce carbon dioxide emissions, efforts have been made to absorb and immobilize carbon dioxide in the exhaust gas discharged from cement factories into concrete or mortar. Concrete and mortar using calcium as an alkali source have a high potential for immobilizing carbon dioxide, and since the resulting carbonate is chemically stable, it is possible to immobilize carbon dioxide semi-permanently, so a large carbon dioxide reduction effect is expected.

[0003] The phenomenon of carbon dioxide being absorbed into concrete or mortar can be confirmed, for example, by differential thermal-thermogravimetric simultaneous analysis (see Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, since carbon dioxide is colorless, the phenomenon of carbon dioxide being absorbed into concrete or mortar cannot be visually confirmed, and it is difficult for the general consumer to understand the carbon dioxide reduction effect.

[0006] In view of such circumstances, an object of the present invention is to provide a method for demonstrating carbon dioxide absorption capable of visualizing the phenomenon of carbon dioxide being absorbed by concrete or mortar, and an apparatus for demonstrating carbon dioxide absorption.

Means for Solving the Problems

[0007] The method for demonstrating carbon dioxide absorption according to the present invention is a method for demonstrating carbon dioxide absorption using a container including a main body having an opening and a cap configured to be able to open and close the opening. The method includes a charging step of charging concrete or mortar into the main body through the opening, a supply step of supplying carbon dioxide into the main body through the opening after the charging step, and a closing step of attaching the cap to the opening and closing the opening after the supply step. As the carbon dioxide is absorbed by the concrete or mortar in the main body, the main body collapses, and the concrete or mortar is a granular material obtained by pulverizing a concrete hardened body or a mortar hardened body, and the minimum value of the particle diameter of the granular material is 0.15 mm or more.

[0008] With such a configuration, the method for demonstrating carbon dioxide absorption can visualize the phenomenon of carbon dioxide being absorbed by concrete or mortar by the collapse of the main body. In particular, in the method for demonstrating carbon dioxide absorption, since the concrete or mortar is a granular material obtained by pulverizing a concrete hardened body or a mortar hardened body, and the minimum value of the particle diameter of the granular material is 0.15 mm or more, the main body starts to collapse after closing the opening, and the main body finishes collapsing in a relatively short time, so that the phenomenon of carbon dioxide being absorbed by concrete or mortar is visually easy to understand.

[0009] In the method for demonstrating carbon dioxide absorption according to the present invention, the main body may be formed of polyethylene terephthalate.

[0010] With such a configuration, in the method for demonstrating carbon dioxide absorption, since the main body is moderately crushed, the phenomenon of carbon dioxide being absorbed by the concrete or mortar becomes visually easier to understand.

[0011] In the method for demonstrating carbon dioxide absorption according to the present invention, the concrete or mortar may contain cement and aggregate.

[0012] With such a configuration, in the method for demonstrating carbon dioxide absorption, the carbon dioxide is more likely to be absorbed by the concrete or mortar.

[0013] In the method for demonstrating carbon dioxide absorption according to the present invention, the thickness of the main body may be 0.2 mm or less.

[0014] With such a configuration, in the method for demonstrating carbon dioxide absorption, since the main body is moderately crushed, the phenomenon of carbon dioxide being absorbed by the concrete or mortar becomes visually easier to understand.

[0015] In the method for demonstrating carbon dioxide absorption according to the present invention, the volume of the container may be 350 mL or more and 1000 mL or less.

[0016] With such a configuration, in the method for demonstrating carbon dioxide absorption, since the main body is moderately crushed, the phenomenon of carbon dioxide being absorbed by the concrete or mortar becomes visually easier to understand.

[0017] In the method for demonstrating carbon dioxide absorption according to the present invention, the mass of the concrete or mortar introduced into the main body may be 100 g / L or more and 400 g / L or less with respect to the volume of the container.

[0018] With such a configuration, in the method for demonstrating carbon dioxide absorption, the carbon dioxide is more likely to be absorbed by the concrete or mortar.

[0019] In the carbon dioxide absorption demonstration method according to the present invention, after the plugging step, the state in which the opening is plugged may be maintained for 0.5 minutes or more and 30 minutes or less.

[0020] With such a configuration, the carbon dioxide absorption demonstration method can visually confirm, in a relatively short time, the phenomenon from when the main body starts to collapse until it finishes collapsing.

[0021] In the carbon dioxide absorption demonstration method according to the present invention, the maximum value of the particle diameter of the granular material may be 10 mm or less.

[0022] With such a configuration, in the carbon dioxide absorption demonstration method, carbon dioxide is more likely to be absorbed by the concrete or mortar, and the main body finishes collapsing in a shorter time. Therefore, the phenomenon of carbon dioxide being absorbed by the concrete or mortar is visually more easily understandable.

[0023] The apparatus for demonstrating carbon dioxide absorption according to the present invention is an apparatus for demonstrating carbon dioxide absorption for performing the above-described carbon dioxide absorption demonstration method, and includes a container having a main body with an opening, a cap configured to be able to open and close the opening, charging means for charging concrete or mortar into the main body from the opening, and supply means for supplying carbon dioxide into the main body from the opening.

[0024] With such a configuration, the apparatus for demonstrating carbon dioxide absorption can visualize the phenomenon of carbon dioxide being absorbed by the concrete or mortar by the collapse of the main body.

Effects of the Invention

[0025] According to the present invention, it is possible to provide a method for demonstrating carbon dioxide absorption that can visualize the phenomenon of carbon dioxide being absorbed by concrete or mortar, and an apparatus for demonstrating carbon dioxide absorption.

Embodiment for Carrying Out the Invention

[0026] Hereinafter, a method for demonstrating carbon dioxide absorption and an apparatus for demonstrating carbon dioxide absorption according to the present embodiment will be described.

[0027] <Method for Demonstrating Carbon Dioxide Absorption> The method for demonstrating carbon dioxide absorption according to the present embodiment uses a container including a main body having an opening and a cap configured to open and close the opening.

[0028] The main body is formed of, for example, polyethylene terephthalate, polyethylene, etc., and is preferably formed of polyethylene terephthalate so that the main body can be appropriately crushed. The cap is formed of, for example, polypropylene, polyethylene, etc. As the container, for example, a PET bottle or the like can be used.

[0029] The thickness of the main body is preferably 0.2 mm or less, more preferably 0.15 mm or more and 0.2 mm or less so that the main body can be appropriately crushed.

[0030] The volume of the container is preferably 350 mL or more and 1000 mL or less, more preferably 350 mL or more and 650 mL or less, still more preferably 500 mL or more and 650 mL or less so that the main body can be appropriately crushed.

[0031] The demonstration method of carbon dioxide absorption according to this embodiment includes a charging step of charging concrete or mortar from the opening into the main body, a supply step of supplying carbon dioxide from the opening into the main body after the charging step, and a closing step of attaching the cap to the opening and closing the opening after the supply step. As the carbon dioxide is absorbed by the concrete or mortar in the main body, the main body collapses.

[0032] Concrete or mortar is a granular material obtained by pulverizing a hardened concrete body or a hardened mortar body. Note that the granular material obtained by pulverizing the hardened concrete body or the hardened mortar body may be moistened with water in advance before use.

[0033] Concrete or mortar contains, for example, cement, aggregate, admixture, admixture agent, water, etc. From the viewpoint of facilitating carbon dioxide absorption, it preferably contains cement and aggregate. Further, as one aspect, concrete or mortar contains a large amount of cement paste composed of cement and water.

[0034] Examples of cement include Portland cements such as ordinary Portland cement, early-strength Portland cement, ultra-early-strength Portland cement, medium-heat Portland cement, sulfate-resistant Portland cement, and white Portland cement defined in JIS R 5210; mixed cements such as blast furnace cement, fly ash cement, and silica cement; and known cements such as super-fast hard cement and alumina cement.

[0035] Concrete or mortar contains fine aggregate and / or coarse aggregate as aggregate. Fine aggregate refers to aggregate that completely passes through a 10 mm sieve and passes through a 5 mm sieve by 85% or more by mass, and coarse aggregate refers to aggregate that remains on a 5 mm sieve by 85% or more by mass (JIS A 0203:2019).

[0036] Examples of fine aggregates include sands derived from natural materials such as river sand, land sand, mountain sand, sea sand, crushed sand, and limestone crushed sand, which are defined in JIS A 5308:2024 Appendix JA Aggregates for Ready-Mixed Concrete; sands derived from slag such as blast furnace slag, electric furnace oxidized slag, and ferronickel slag; recycled aggregates; artificial lightweight aggregates; recovered aggregates; etc. Also, silica sand produced by crushing and classifying silica may be used.

[0037] Examples of coarse aggregates include natural aggregates such as river gravel, mountain gravel, and sea gravel; artificial aggregates such as crushed stones from sandstone, hard limestone, basalt, and andesite; recycled aggregates; etc.

[0038] Examples of admixtures include inorganic fine powders such as fly ash, cement kiln dust, blast furnace fume, fine powder of blast furnace granulated slag, fine powder of blast furnace chilled slag, fine powder of converter slag, hemihydrate gypsum, expansive agent, fine powder of limestone, fine powder of quicklime, and fine powder of dolomite; inorganic fillers such as sodium-type bentonite, calcium-type bentonite, attapulgite, sepiolite, activated clay, acid clay, allophane, imogolite, shirasu (volcanic ash), shirasu balloon, kaolinite, metakaolin (calcined clay), synthetic zeolite, artificial zeolite, artificial zeolite, mordenite, and clinoptilolite.

[0039] Examples of admixtures include AE agents, AE water reducers, high-performance water reducers, high-performance AE water reducers, fluidizing agents, separation-reducing agents, thickening agents, thixotropic agents, setting retarders (e.g., tartaric acid, etc.), setting accelerators (e.g., aluminum sulfate, etc.), flash set agents, shrinkage-reducing agents, foaming agents, blowing agents, defoaming agents, waterproof agents, etc.

[0040] Water is not particularly limited, and for example, tap water, industrial water, recovered water, groundwater, river water, rainwater, etc. can be used.

[0041] Concrete and mortar contain cement hydrates such as calcium silicate hydrate, calcium hydroxide, calcium aluminate hydrate, calcium ferroaluminate hydrate, etc., which are produced by the hydration reaction of cement and water. When this cement hydrate undergoes a neutralization reaction with carbon dioxide, the carbon dioxide is absorbed.

[0042] From the perspective of facilitating the absorption of carbon dioxide, the mass of the concrete or mortar introduced into the main body is preferably 100 g / L or more and 400 g / L or less, more preferably 186 g / L or more and 400 g / L or less, based on the volume of the container.

[0043] Concrete or mortar is a granular material obtained by crushing a hardened concrete body or a hardened mortar body, and the minimum value of the particle size of the granular material is 0.15 mm or more. If the minimum value of the particle size of the granular material is less than 0.15 mm, the rate at which the granular material absorbs carbon dioxide is too fast, and carbon dioxide begins to be absorbed by the granular material before the opening of the container is closed. Therefore, immediately after or simultaneously with the closing of the opening, the main body of the container collapses, and the phenomenon of carbon dioxide being absorbed by the granular material becomes visually difficult to distinguish. In the method for demonstrating carbon dioxide absorption according to the present embodiment, since the minimum value of the particle size of the granular material is 0.15 mm or more, after the opening is closed, the main body begins to collapse after 5 seconds or more have elapsed, and the main body finishes collapsing in a relatively short time. Therefore, the phenomenon of carbon dioxide being absorbed by the granular material is visually easy to understand. Also, from the perspective of facilitating the absorption of carbon dioxide, the maximum value of the particle size of the granular material is preferably 10 mm or less, more preferably 5 mm or less. The particle size of the granular material is selected by the method specified in the general rules of the JIS Z 8815 sieving test method into particles that do not pass through a 1 mm sieve and particles that pass through, and the particles that do not pass through are measured by the method specified in the general rules of the JIS Z 8815 sieving test method.

[0044] In the supply step, the supply amount of carbon dioxide is preferably an amount sufficient to visually make the phenomenon of carbon dioxide being absorbed by the concrete or mortar more understandable, and more preferably, it is 1.2 times or more and 2 times or less the volume of the container, from the perspective of visually making the phenomenon of carbon dioxide being absorbed by the concrete or mortar more understandable.

[0045] After the plugging step, preferably, the state of plugging the opening is maintained for 0.5 minutes or more and 30 minutes or less, more preferably, 1.5 minutes or more and 15 minutes or less, and even more preferably, 1.5 minutes or more and 4.5 minutes or less. With such a configuration, the demonstration method of carbon dioxide absorption according to this embodiment can visually confirm the phenomenon from the start to the end of the collapse of the main body in a relatively short time. If the time for maintaining the state of plugging the opening after the plugging step is too long, it is not suitable as a demonstration for visualizing the phenomenon of carbon dioxide being absorbed by the concrete or mortar.

[0046] The demonstration method of carbon dioxide absorption according to this embodiment includes a charging step of charging concrete or mortar into the main body from the opening, a supply step of supplying carbon dioxide into the main body from the opening after the charging step, and a plugging step of attaching the cap to the opening and plugging the opening. By including these steps, the phenomenon of carbon dioxide being absorbed by the concrete or mortar can be visualized by the collapse of the main body.

[0047] <Apparatus for Demonstrating Carbon Dioxide Absorption> The apparatus for demonstrating carbon dioxide absorption according to this embodiment is an apparatus for demonstrating carbon dioxide absorption for performing the above-described demonstration method of carbon dioxide absorption.

[0048] The apparatus for demonstrating carbon dioxide absorption includes a container having a main body with an opening and a cap configured to open and close the opening, an input means for introducing concrete or mortar into the main body from the opening, and a supply means for supplying carbon dioxide into the main body from the opening. As the container, the container described in the carbon dioxide absorption demonstration method according to the present embodiment can be used.

[0049] The input means is not particularly limited. For example, it is configured to measure concrete or mortar using a hopper or the like and introduce it into the main body from the opening.

[0050] The supply means may be a pressure vessel filled with carbon dioxide.

[0051] The apparatus for demonstrating carbon dioxide absorption according to the present embodiment includes a container having a main body with an opening and a cap configured to open and close the opening, an input means for introducing concrete or mortar into the main body from the opening, and a supply means for supplying carbon dioxide into the main body from the opening. By this, the phenomenon that carbon dioxide is absorbed by the concrete or mortar can be visualized by the main body collapsing.

[0052] The present invention includes the following aspects. [1] A method for demonstrating carbon dioxide absorption using a container including a main body having an opening and a cap configured to open and close the opening, an input step of introducing concrete or mortar into the main body from the opening, a supply step of supplying carbon dioxide into the main body from the opening after the input step, and a closing step of attaching the cap to the opening and closing the opening after the supply step, and as the carbon dioxide is absorbed by the concrete or mortar in the main body, the main body collapses, The concrete or mortar is a granular material obtained by pulverizing a hardened concrete body or a hardened mortar body, A method for demonstrating carbon dioxide absorption, wherein a minimum value of a particle diameter of the granular material is 0.15 mm or more. [2] The method for demonstrating carbon dioxide absorption according to [1], wherein the main body is formed of polyethylene terephthalate. [3] The method for demonstrating carbon dioxide absorption according to [1] or [2], wherein the concrete or mortar contains cement and aggregate. [4] The method for demonstrating carbon dioxide absorption according to any one of [1] to [3], wherein a thickness of the main body is 0.2 mm or less. [5] The method for demonstrating carbon dioxide absorption according to any one of [1] to [4], wherein a volume of the container is 350 mL or more and 1000 mL or less. [6] The method for demonstrating carbon dioxide absorption according to any one of [1] to [5], wherein a mass of the concrete or mortar to be introduced into the main body is 100 g / L or more and 400 g / L or less with respect to a volume of the container. [7] The method for demonstrating carbon dioxide absorption according to any one of [1] to [6], wherein a state in which the opening is closed is maintained for 0.5 minutes or more and 30 minutes or less after the closing step. [8] The method for demonstrating carbon dioxide absorption according to any one of [1] to [7], wherein a maximum value of the particle diameter of the granular material is 10 mm or less. [9] An apparatus for demonstrating carbon dioxide absorption for performing the method for demonstrating carbon dioxide absorption according to any one of [1] to [8], A container including a main body having an opening and a cap configured to be able to open and close the opening, Feeding means for feeding concrete or mortar into the main body from the opening, and Supply means for supplying carbon dioxide into the main body from the opening, the apparatus for demonstrating carbon dioxide absorption.

Example

[0053] Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to the following embodiments.

[0054] <Absorbent material> As the absorbent material, granular matter obtained by pulverizing a hardened concrete containing ordinary Portland cement, fine aggregate, coarse aggregate, and admixture was used. Table 1 shows the mass and particle size of the absorbent material. For Examples 17 to 21, water in the amount shown in Table 1 was added to the absorbent material.

[0055] The particle size of the granular matter was selected by the method specified in the general rules of the JIS Z 8815 sieving test method into particles that do not pass through a 1 mm sieve and particles that pass through, and the particles that do not pass through were measured by the method specified in the general rules of the JIS Z 8815 sieving test method.

[0056] <Container> As the container, a PET bottle whose main body is formed of polyethylene terephthalate and is provided with a cap was used. Table 1 shows the volume of the container and the thickness of the main body.

[0057] <Examples 1 to 23> After the absorbent material was introduced into the main body from the opening, carbon dioxide was supplied at 200 mL / second in an amount twice the volume of the container, and the opening was closed with a cap. After closing, the time when the main body of the container began to collapse was defined as the "container deformation start time", and the time when the main body of the container finished collapsing and no more deformation occurred was defined as the "container deformation end time", which are shown in Table 1.

[0058] In addition, the degree of collapse of the container was visually observed and evaluated based on the following criteria. The results are shown in Table 1. ○: The state where the container collapsed until there was almost no internal space △: The state where the container clearly collapsed, but an internal space clearly remained ×: The state where the container did not deform, or the state where it deformed but was slightly dented

[0059] Regarding the start time and end time of container deformation, as well as the result of the degree of crushing of the container, a comprehensive evaluation was carried out based on the following indicators. ◎: The start time of container deformation is 5 seconds or more, the end time of container deformation is 5 minutes or less, and the degree of crushing of the container is "○". ○: The start time of container deformation is 5 seconds or more, the end time of container deformation is 5 minutes or less, and the degree of crushing of the container is "△". △: The start time of container deformation is 5 seconds or more, the end time of container deformation exceeds 5 minutes, and the degree of crushing of the container is "○" or "△". ×: The start time of container deformation is less than 5 seconds, or the degree of crushing of the container is "×".

[0060]

Table 1

[0061] As can be seen from the results in Table 1, the carbon dioxide absorption demonstration method according to the present invention can visualize the phenomenon of carbon dioxide being absorbed by concrete or mortar. Further, in the carbon dioxide absorption demonstration method according to the present invention, since a granular material having a minimum particle diameter of 0.15 mm or more is used as the absorption material, after the opening is plugged, the main body of the container starts to collapse after 5 seconds or more have elapsed, and the main body collapses in a relatively short time. Therefore, the phenomenon of carbon dioxide being absorbed by concrete or mortar is visually easy to understand.

Claims

1. A demonstration method for carbon dioxide absorption using a container comprising a main body having an opening and a cap configured to open and close the opening, an input step of inputting concrete or mortar into the main body through the opening, a supply step of supplying carbon dioxide into the main body through the opening after the input step, a closing step of attaching the cap to the opening and closing the opening after the supply step, and the main body collapses as the carbon dioxide is absorbed by the concrete or mortar in the main body, the concrete or mortar is a granular material obtained by pulverizing a concrete hardened body or a mortar hardened body, A demonstration method for carbon dioxide absorption, wherein the minimum value of the particle diameter of the granular material is 0.15 mm or more.

2. The demonstration method for carbon dioxide absorption according to claim 1, wherein the main body is formed of polyethylene terephthalate.

3. The demonstration method for carbon dioxide absorption according to claim 1, wherein the concrete or mortar contains cement and aggregate.

4. The demonstration method for carbon dioxide absorption according to claim 1, wherein the thickness of the main body is 0.2 mm or less.

5. The demonstration method for carbon dioxide absorption according to claim 1, wherein the volume of the container is 350 mL or more and 1000 mL or less.

6. The demonstration method for carbon dioxide absorption according to claim 1, wherein the mass of the concrete or mortar input into the main body is 100 g / L or more and 400 g / L or less with respect to the volume of the container.

7. The demonstration method for carbon dioxide absorption according to claim 1, wherein the state of closing the opening is maintained for 0.5 minutes or more and 30 minutes or less after the closing step.

8. The demonstration method for carbon dioxide absorption according to claim 1, wherein the maximum value of the particle diameter of the granular material is 10 mm or less.

9. A demonstration apparatus for carbon dioxide absorption for performing the demonstration method for carbon dioxide absorption according to any one of claims 1 to 8, a container comprising a main body having an opening and a cap configured to open and close the opening, input means for inputting concrete or mortar into the main body through the opening, and An apparatus for demonstrating carbon dioxide absorption, comprising supply means for supplying carbon dioxide from the opening into the main body.

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