JP4571883B2 - Vapor absorption / release materials using salt-containing organic substances - Google Patents

Description

  The present invention relates to a material that absorbs and releases vapor such as water and organic solvents. More specifically, the present invention relates to a vapor absorption / release material using a salt-containing organic carbide.

  The vapor absorbing / releasing material has a characteristic of absorbing / releasing vapor such as water vapor, and is used as a heat pump adsorbent for a cooling / heating device, a humidity adjusting adsorbent, or the like. As such a vapor absorption / release material, a metal salt or a porous body having pores on the surface is known.

  Many attempts have been made to use a metal or metal oxide having pores as a vapor absorbing / releasing material. For example, Patent Document 1 describes a layered silica porous body or a layered silica metal oxide porous body. In this porous body, a value (W90-W50) obtained by subtracting the vapor adsorption amount (W50) at a humidity of 50% from the vapor adsorption amount (W90) at a humidity of 90% indicates 50% of its own weight. This indicates that 50% of its own weight of water vapor can be absorbed and released, which is higher than charcoal. Therefore, it is excellent as a humidity control material. However, the manufacturing cost is high and it is difficult to use. Patent Document 2 describes a vapor absorbing / releasing material in which a metal salt such as sodium chloride is attached to the pores of a mesoporous body having pores of a predetermined size. This vapor absorption / release material has a W90-W50 value as low as several percent of its own weight. Therefore, the vapor absorption / release material is more suitable for use as a moisture absorption material than a humidity control material, and the production process is complicated and the production cost is high. . Patent Document 3 describes a humidity control material obtained by mixing a silicon compound solution and an aluminum compound or a transition metal compound solution and hydrothermally synthesizing. The value of W90-W50 of this humidity control material is 55% of its own weight and its capacity is relatively high, but the manufacturing cost is high and it cannot be said that it is versatile. As described above, the vapor absorbing / releasing material using metal or metal oxide has a problem in manufacturing process and manufacturing cost.

  On the other hand, charcoal, including charcoal, has pores, and thus has been studied as a vapor absorption / release material. Patent Document 4 describes an underfloor humidity control material obtained by carbonizing a wood chip in its original form. Non-Patent Document 1 describes the humidity control ability of charcoal with respect to water vapor. According to it, charcoal does not adsorb much water vapor when humidity is low. The reason is that the charcoal surface is hydrophobic and has a low affinity for water vapor. When the humidity becomes 40 to 50%, the amount of adsorption increases rapidly, and when the humidity becomes about 90%, the increase in the amount of adsorption becomes dull and approaches a constant value. Non-Patent Document 1 describes the humidity control ability of charcoal (W90-W55). In the case of charcoal, the humidity control capacity is about 2 to 3%, and when activated charcoal is about 15 to 45%. It is shown that there is. Therefore, Patent Document 5 describes an attempt to activate carbonize charcoal.

By the way, since charcoal is fragile and difficult to handle, attempts have been made to combine it with other materials to make a humidity control material. For example, Patent Document 6 describes that charcoal (charcoal), a porous material, and an adhesive are mixed and formed into a building material panel or sheet. This material is used exclusively for the adsorption of aldehydes and is not very versatile. Patent Document 7 discloses a granulated product of granular coal (for example, charcoal, pulp sludge, coffee, okara, food waste charcoal such as food) and a nonflammable humidity control material (for example, sepiolite, zeolite). A humidity control material consisting of is described. However, its humidity control ability is low and not practical.
JP-A-6-304437 JP 11-11410 A JP 2002-95926 A JP-A-4-124343 JP 2000-226207 A JP-A-10-305226 JP 2000-325733 A “Power of Charcoal” 2001, No. 8, pages 18-22

  An object of this invention is to provide the carbide | carbonized_material with improved vapor | steam absorption / release capability.

  The present invention provides a vapor absorbing / releasing material containing a salt-containing organic carbide.

  In one embodiment, the carbide of the salt-containing organic material is a carbide obtained by baking the salt-containing organic material at a temperature of 300 to 1000 ° C.

  In another embodiment, the carbide of the above-mentioned salt-containing organic substance is obtained by further activating the carbide obtained by baking the salt-containing organic substance at a temperature of 100 to 1000 ° C. at a temperature of 300 to 1000 ° C. It is.

  Furthermore, in another embodiment, the salt-containing organic material is at least one selected from the group consisting of soy sauce cake, salt kelp waste, boiled waste, miso waste, soup, soup stock, pickles, urban rice cake, and cooking waste. Is one waste.

  In a different embodiment, the salt-containing organic material is soy sauce cake.

  In a further different embodiment, the vapor absorbing / releasing material contains an additive.

  In another embodiment, the vapor absorbing / releasing material is molded.

  In still another embodiment, the vapor absorbing / releasing material is obtained by further activation treatment at a temperature of 300 to 1000 ° C. after molding.

  Moreover, in a different embodiment, the said additive is added in the ratio of 0.05-10 mass parts with respect to 1 mass part of carbides of the said salt-containing organic substance.

  In still another embodiment, water vapor can be absorbed and released in the same amount or more than its own weight.

  In the case of water vapor, the vapor absorbing / releasing material containing the salt-containing organic carbide of the present invention has an absorbing / releasing capability equivalent to or higher than its own weight. This corresponds to an absorption / release capacity three times that of commercially available silica gel. Therefore, it is very excellent as an adsorbent for an adsorption heat pump and an adsorbent for humidity adjustment (humidity adjusting agent) of an air conditioner. Furthermore, since the carbide of the salt-containing organic substance has good affinity with the additive used for the vapor absorption / release material, it can be molded into various shapes. In addition, the ability of charcoal itself to absorb harmful substances such as organic solvents can be expected. In addition, due to the salt content, it has antibacterial and anti-ant activity more than charcoal. Therefore, if an additive is added to the fine powder of carbide and applied to wood, antibacterial / antifungal / anticidal effects can be obtained. Also, by mixing or impregnating fibers such as clothing and non-woven fabrics, it can be used for deodorized antibacterial clothing or mats under floors and closets. Therefore, it can be used for daily goods, house building materials, indoor interiors, etc. Since the vapor absorption / release material of the present invention can be used as a heat source when it is no longer needed, the organic waste can be reused (material recycling) and reused as a heat source (thermal recycling). There is an effect that the recycled resources can be used. Gypsum board is also a reusable product (material recycling) from power plants, etc., but since it cannot use heat, it cannot be processed and continues to increase. On the other hand, the vapor absorption / release material containing the salt-containing organic carbide can be reused as a heat source (thermal recycling) and is carbon neutral, so that it also has the effect of suppressing carbon dioxide emissions. Are better.

A: Salt-containing organic substance (Salt-containing organic substance)
In the present specification, the salt-containing organic substance refers to an organic substance containing a salt content. For example, food containing salt (salt) (for example, miso, soy sauce, salted salt, salt kelp, etc.), organic waste containing salt (hereinafter “salt-containing organic waste” or simply “salt-containing waste” It may be referred to as a “product”), but is not limited thereto. From the viewpoint of effective use of resources, salt-containing organic waste is preferably used. The salt-containing organic substance can be obtained by a method such as purchasing as a valuable resource, obtaining it free of charge, obtaining it with money (reverse purchase). Or you may obtain combining these methods.

  Examples of the salt-containing organic waste include municipal waste, sewage sludge, settlement drainage sludge, human waste sludge, livestock manure, and food waste. Examples of livestock manure include cow dung, pig manure, and chicken manure. Examples of food waste include soy sauce squeezed rice cake (soy sauce cake), salt kelp waste, boiled waste waste, miso waste, soup, soup stock, pickles, cooking scraps, and the like. These salt-containing wastes may be used alone or in combination of two or more. The salt-containing waste may be used in combination in consideration of the salinity when the carbide is used. For example, when using municipal waste, sewage sludge, village drainage sludge, human waste sludge, livestock manure, cooking waste, etc. with relatively low salinity, soy sauce cake, salt kelp waste, boiled waste, Or you may mix and use miso waste or salt. When salt-containing waste is used as a mixture, it may be used as it is for carbonization. In order to uniformly disperse the sodium chloride in the carbide, it is more preferable to mix with a mixer or the like and make the mixture uniform before firing.

B. Carbide of salt-containing organic substance and its production method Carbide of salt-containing organic substance (for example, salt-containing waste) is obtained by further treating carbide obtained by the primary treatment of salt-containing organic substance described later and the carbide obtained by the primary treatment (2) Carbides obtained by various methods such as activated carbides obtained by subsequent treatment) and activated carbides obtained by treating salt-containing organic substances by a chemical activation method are included. The salt-containing carbide is preferably a powder. Alternatively, powdered salt-containing carbides molded into various shapes may be used. As a method for powdering salt-containing carbide, a carbide powdering method known to those skilled in the art is applied.

(Primary processing)
Carbonization (primary treatment) of the salt-containing organic substance is performed by baking the salt-containing organic substance at a temperature of preferably 100 to 1000 ° C, more preferably 650 to 850 ° C. If it is less than 100 degreeC, the exothermic characteristic of the exothermic mixture containing this salt-containing carbide tends to deteriorate, and if it exceeds 1000 degreeC, salt in the carbide may volatilize. The obtained salt-containing carbide may be a powder.

The salt-containing carbide obtained by the primary treatment usually contains 10 to 50% by mass of sodium chloride in a uniformly dispersed state. The specific surface area of the chlorine-carbides varies depending chlorine organic substances used, in general, is often in the range of from about ^{1m 2} / ^g~60m 2 / g.

(Secondary processing)
The secondary treatment is a treatment for further activating the salt-containing carbide obtained by the primary treatment. The activation treatment includes a gas activation method and a chemical activation method. Either method may be used. The gas activation method is a method in which water vapor, carbon dioxide, oxygen (air), a mixed gas of these gases and a combustion gas, a combustion gas, or the like is brought into contact with a carbonized raw material at a high temperature. In the present invention, the salt-containing carbide obtained by the primary treatment is treated at a temperature of 600 to 1000 ° C., preferably 800 to 900 ° C. while adding water vapor, air (oxygen), carbon dioxide, etc., for example. (Gas activation method) is used. Alternatively, for example, the salt-containing organic substance may be subjected to a primary treatment at a temperature of 300 to 500 ° C., and the obtained carbide may be subjected to a secondary treatment. If the temperature of the secondary treatment is less than 600 ° C, the activation of the carbide may be insufficient, and if it exceeds 1000 ° C, the salt in the activated carbide may volatilize.

The activated carbide obtained by the secondary treatment usually contains 10 to 50% by mass of sodium chloride in a uniformly dispersed state. The specific surface area of activity carbide used varies depending chlorine organic substances, in general, often in the range of from about 100m ² / g~300m ² / g, which is a carbide of only primary treatment 5-100 Double specific surface area. Further, by performing the secondary treatment, there are also effects of homogenizing the carbide and cleaning the surface, so that the activated carbide may be preferably used.

(Chemical activation method)
The chemical activation method is a method in which a raw material is uniformly impregnated with an activation chemical, heated (baked) in an inert gas atmosphere, and activated carbonized by dehydration and oxidation reaction with the chemical. Examples of the activator include compounds having dehydrating properties, oxidizing properties, and erosive properties such as zinc chloride, phosphoric acid, calcium chloride, calcium sulfide, and potassium hydroxide. Most preferred is zinc chloride. A method for obtaining an activated carbide of a salt-containing organic substance by a chemical activation method is, for example, adding and mixing a saturated aqueous solution of the activation chemical (for example, zinc chloride) described above to a salt-containing organic substance dried at 100 to 200 ° C. for several hours. In this method, the salt-containing organic substance is impregnated with an activation chemical, and further dried (baked) at 100 to 200 ° C. for several hours in an inert gas atmosphere. In the drug activation method, the mass ratio between the active chemical and the dry salt-containing organic substance (the active chemical impregnation mass / the dry salt-containing organic substance amount) varies depending on the active chemical and the salt-containing organic substance to be used. 5, preferably 1-4. In addition, mass ratio is represented with the following formula | equation.

Mass ratio = (Y−X) / X
X: Dry mass of the salt-containing organic substance before impregnating the activation chemical Y: Dry mass of the salt-containing organic substance after impregnating the activation chemical

  When using zinc chloride as an activating chemical, it is preferable to dry the salt-containing organic substance at 110 ° C., impregnate with zinc chloride, and then dry at about 110 ° C. The mass ratio of zinc chloride is preferably about 3.

  The salt-containing carbide obtained by the treatment with this chemical activation method has fine porosity due to dehydration and oxidation reaction with the activation chemical, and has a large specific surface area. Are preferably used. The activated carbon (chemical treatment) may be further activated (secondary treatment) at a temperature of 300 to 1000 ° C. This treatment further improves the function as activated carbon. If the temperature of the secondary treatment is less than 300 ° C, activation of the activated carbide may be insufficient, and if it exceeds 1000 ° C, salt in the activated carbide may volatilize.

  There is no restriction | limiting in particular in the method used for a carbonization process (a primary process and a secondary process) or a chemical activation process, A batch process may be sufficient and a continuous process may be sufficient. The carbonization treatment apparatus may be any apparatus such as a batch furnace, a kiln type treatment apparatus, a fluidized bed type treatment apparatus, or a screw type treatment apparatus.

C. Vapor absorption / release material The obtained salt-containing carbide is directly used as the vapor absorption / release material of the present invention. For example, it is housed in a breathable container or bag, and is used as a vapor absorbing / releasing material, as well as a humidity control product, a deodorizing product, a hazardous substance removing product, and the like. Then, the carbide is formed into a desired shape by using an additive, and if necessary, a treatment similar to the above-described secondary treatment (for example, activation treatment) is further performed as a vapor absorption / release material. It may be used as a deodorizing article, a hazardous substance removing article, and the like. The phrase “containing a carbide of a salt-containing organic substance” includes a case of “consisting of a carbide of a salt-containing organic substance”.

(Salt-containing carbide molding)
The salt-containing carbide can also be formed into a desired shape according to the application by combining various additives. Examples of the additive used in the present invention include inorganic additives and organic additives. The additive and the blending ratio thereof may be determined mainly in consideration of molding into a shape according to the application or imparting strength of the molded product. The salt-containing carbide used in the present invention is excellent in moldability because of its good affinity with additives.

  As an inorganic additive, a building material made of a water-curable material mainly containing either gypsum or cement; a fired material building material mainly containing at least one selected from the group consisting of ceramic, foamed ceramic and tile A fiber material building material mainly composed of at least one selected from the group consisting of rock wool, slag wool, glass wool, and pulp; a material selected from the group consisting of building materials such as diatomaceous earth, perlite, and earth wall; etc. Is mentioned.

  Organic additives include petroleum-based materials containing either linear or cyclic carbides such as pitch, coal tar, and creosote; linear or cyclic components such as biomass tar and creosote derived from plants; carbonizing biomass Or activated carbon obtained by activating the carbide; water-soluble polymer materials such as starch paste, carboxymethyl cellulose (CMC) and glue; or materials obtained by combining these materials.

  Other additives include tap water, pure water, ultrapure water, industrial water, distilled water, and ion exchange water.

  As described above, the type and amount of the additive to be used are determined depending on the application, shape and the like as described above. Generally, the additive is in a ratio of 0.05 to 10 parts by mass with respect to 1 part by mass of the salt-containing carbide. Preferably, it is added at a ratio of 0.1 to 5 parts by mass.

  Furthermore, dyes, pigments, and the like may be added or applied to the surface.

  The above salt-containing carbides, additives and the like are mixed and formed into a desired shape. There is no particular limitation on the molding method, and depending on the type and amount of additive used, for example, coating, heat (heating or cooling), pressurization, chemical reaction, magnetic force, radiation irradiation, ultraviolet irradiation, explosion, supercritical state or A method such as a hydrothermal reaction in a subcritical state can be used.

  There is no restriction | limiting in particular in the shape of a vapor | steam absorption / release material, The shape according to a use, a use place, etc. is selected. Examples include, but are not limited to, a sphere, a cylinder, a disc, a cone, a cube, a triangular prism, a polygonal column, a polyhedron, a star shape, a plate shape, a human shape, an animal shape, and a plant shape. These crushed products can also be used.

  Further, the vapor absorbing / releasing material or the vapor absorbing / releasing material formed as necessary may be laminated with another member such as a building material.

  Since the molded body containing the salt-containing carbide formed into a desired shape is prevented from coming into contact with various vapors, the vapor absorption / release capability may be reduced. In this case, it is preferable to perform an activation process. In particular, when an organic additive is used, both the salt-containing carbide and the additive are activated.

  Further, the vapor absorbing / releasing material may be liquid. For example, a salt-containing carbide and an additive other than water and an organic solvent can be dispersed in water or an organic solvent, and this can be applied or impregnated in a desired portion of a desired shape. For example, it can be used not only as a vapor absorption / release material, but also as an antibacterial / antifungal / anticidal agent and also as a deodorant by applying it on wood, or applying or impregnating it to a fiber material and drying it. . In particular, since the vapor absorbing / releasing material of the present invention contains a high concentration of salt, it is also excellent as an antibacterial / antifungal / anticidal agent.

  Hereinafter, the present invention will be described with respect to examples using soy sauce cake as a salt-containing organic substance, but the present invention is not limited to these examples.

Example 1 Preparation of Soy Sauce Carbide (Carbide A)
Raw soy sauce cake containing water was carbonized in a continuous carbonization furnace at 450 ° C. under oxygen-free conditions to obtain a carbide A. The amount of raw soy sauce cake processed was 19 kg / h. The salt content of the carbide A was 21.7% by mass. The sodium concentration (Na concentration) was measured by a flame photometric method based on JIS K0102.48.1. The chlorine concentration (Cl concentration) is an added value of the chlorine concentration by the pump combustion method and the combustible chlorine concentration by the ion chromatography method based on JIS K0102.35.3. The salt concentration in the soy sauce cake carbide is a value obtained by adding the Na concentration and the Cl concentration.

  About 0.1 g of the obtained carbide A was weighed and degassed under vacuum at 120 ° C. for 10 hours. Then, using an automatic vapor adsorption measuring device (BELSORP 28, manufactured by Nippon Bell), the adsorption amount of water vapor at 25 ° C. is within a range up to a relative equilibrium pressure of 0.95 (the saturated vapor pressure of water at 25 ° C. is 23.76 mmHg). Therefore, the equilibrium pressure was measured in a range of 22.57 mmHg or less. When the relative equilibrium pressure exceeded 0.95, the measurement of the desorption amount of water vapor was started. The difference (W90) between the adsorption amount of water vapor (mass: W90) when the relative equilibrium pressure in the adsorption process is 0.90 and the adsorption amount (mass: W55) of water vapor when the relative equilibrium pressure in the desorption process is 0.55. The percentage of the value obtained by dividing -W55) by the mass of the carbide A was evaluated as the humidity control ability (%). Table 1 shows the humidity control ability of the carbide A, and FIG. 1A shows the adsorption isotherm and desorption isotherm of the carbide A.

(Example 2: Preparation of soy sauce cake carbide (carbide B))
Carbide B was obtained in the same manner as in Adjustment Example 1 except that the carbonization temperature was 600 ° C. The salt content of the carbide B was 28.2% by mass.

  The humidity control ability of the carbide B was determined in the same manner as in Example 1 except that the carbide B was used instead of the carbide A. Table 1 shows the humidity control ability of the carbide B, and FIG. 1B shows the adsorption isotherm and desorption isotherm.

(Example 3: Preparation of activated soy sauce lees carbide (activated carbide C))
Carbide A prepared in Example 1 was charged again into the carbonization furnace, and steam was introduced at a temperature of 800 ° C. to react for 1 hour. Thereby, activated carbide C was obtained. The salt content of the activated carbide C was 29.4% by mass.

  The humidity control ability of the activated carbide C was determined in the same manner as in Example 1 except that the activated carbide C was used instead of the carbide A. Table 1 shows the humidity control ability of the activated carbide C, and FIG. 1 (c) shows the adsorption isotherm and desorption isotherm.

(Example 4: Preparation of molded body of soy sauce koji carbide (molded body D))
To 1500 g of the carbide A prepared in Example 1, 450 g of pitch, 75 g of creosote and 225 g of water were added and mixed as additives. Using a Fuji Paudal disk pelleter F-5, it was molded into a cylindrical shape under a pressure of 150 to 200 kg / cm ² to obtain a molded product D. The salt content of the molded body D was 16.0% by mass.

  The humidity control ability of the molded body D was determined in the same manner as in Example 1 except that the molded body D was used instead of the carbide A. Table 1 shows the humidity control ability of the molded body D, and FIG. 1 (d) shows the adsorption isotherm and desorption isotherm.

(Example 5: Preparation of activated molded body (molded body E))
The soy sauce cake carbide molded body D prepared in Example 4 was again put into a carbonization furnace, and steam was introduced at a temperature of 800 ° C. to react for 1 hour. Thereby, the activated molded body E was obtained. The salt content of the activated molded body E was 35.2% by mass.

  The humidity control ability of the activated molded body E was determined in the same manner as in Example 1 except that the activated molded body E was used instead of the carbide A. Table 1 shows the humidity control ability of the activated molded body E, and FIG. 1 (e) shows the adsorption isotherm and desorption isotherm.

(Comparative Examples 1-3)
Humidity control ability was determined in the same manner as in Example 1 except that three types of commercially available silica gel (Comparative Examples 1 to 3) were used instead of the carbide A. Table 1 shows the humidity control ability of each silica gel, and FIGS. 2 (a) to 2 (c) show the adsorption isotherm and desorption isotherm of each silica gel.

(Comparative Examples 4-5)
Humidity control ability was calculated | required like Example 1 except having used commercial Bincho charcoal (comparative example 4) and commercial bamboo charcoal (comparative example 5) instead of carbide A. Table 1 shows the humidity control capacity of Bincho charcoal and bamboo charcoal, and FIGS. 2 (d) to 2 (e) show the adsorption isotherm and desorption isotherm of Bincho charcoal and bamboo charcoal, respectively.

As can be seen from FIG. 1 (a), the adsorption amount of the carbide A increases as the humidity increases, and 1759 ml / g of the carbide A (1.41 g) at a relative equilibrium pressure (P / P ₀ [−]) of 0.9. / G of carbide A) was adsorbed. At a relative equilibrium pressure of 0.55, 88 ml / g of carbide A (0.7 g / g of carbide A) was adsorbed. Therefore, W90-W55 was 1.34 g / g carbide A, and the humidity control ability was 134% (see Table 1). Carbide B shown in FIG. 1 (b) also showed the same behavior as FIG. 1 (a). The humidity control ability of the carbide B was 133%. From this, it was found that the soy sauce charcoal containing salt can absorb and release water vapor 1.3 times or more of its own weight.

  On the other hand, as shown in Table 1, the humidity control ability of commercially available silica gel was 6 to 46%, and the humidity control ability of ordinary carbides (Bincho charcoal and bamboo charcoal) was as low as 1 to 3%. This result shows that the vapor absorbing / releasing material made of the salt-containing carbide of the present invention is an unprecedented vapor absorbing / releasing material having an excellent humidity control ability.

  In addition, the activated carbide C shown in FIG. 1 (c) has an increased amount of adsorption as the humidity increases, and 1436 ml / g carbide C (1.15 g / g carbide C) of water vapor is obtained at a relative equilibrium pressure of 0.9. Adsorbed. The humidity control ability was 105%, which was inferior to the carbides A and B, but was able to adsorb water vapor equivalent to or higher than its own weight. Therefore, it has a much better humidity control ability than conventional carbides.

  Molded body D shown in FIG. 1 (d) was formed by adding an organic additive to carbide A, but its humidity control ability was as low as 14%. This is considered due to the fact that the additive prevented the activated carbon from coming into contact with water vapor.

  An activated molded body E shown in FIG. 1 (e) is obtained by further activating the molded body D. As the humidity increased, the amount of adsorption increased and 1591 ml / g molded body E (1.27 g / g molded body E) of water vapor was adsorbed at a relative equilibrium pressure of 0.9. The humidity control ability was 115%, which was inferior to the carbide A and the carbide B, but was able to adsorb water vapor more than its own weight. Therefore, it has a much better humidity control ability than conventional carbides.

  Further, when FIG. 1 is compared with FIG. 2, the adsorption isotherm and desorption isotherm of the vapor adsorption / desorption material containing salt-containing carbides are characterized in that the adsorption / desorption capability greatly increases when the relative equilibrium pressure exceeds 0.7. have. This means that adsorption / desorption occurs only when the humidity is high. Therefore, it can be seen that the humidity can be adjusted very efficiently by absorbing moisture when necessary.

  The vapor absorbing / releasing material containing the salt-containing organic carbide of the present invention has a very high vapor absorbing / releasing capability, and has a water vapor absorbing / releasing capability three times that of commercially available silica gel. Therefore, it is very excellent as an adsorbent for an adsorption heat pump and an adsorbent for humidity adjustment (humidity adjusting agent) of an air conditioner. In addition, charcoal itself has an excellent ability to absorb harmful substances such as organic solvents. Since the vapor absorption / release material of the present invention can be used as a heat source when it is no longer needed, the organic waste can be reused (material recycling) and reused as a heat source (thermal recycling). Since recycled resources can be used, it is industrially useful as a vapor absorption / release material that is environmentally friendly.

It is a figure which shows the adsorption isotherm and desorption isotherm of the vapor | steam absorption / release material containing the carbide | carbonized_material of the salt containing organic substance of this invention. It is a figure which shows the adsorption isotherm and desorption isotherm of the silica gel (FIG.2 (a)-(c)) which is a comparative example, Bincho charcoal (FIG.2 (d)), and bamboo charcoal (FIG.2 (e)).

Claims (8)

Containing carbide chlorine organic substances, a vapor absorbing and releasing material, the hydrated salt organic matter, at least one waste selected from soy sauce cake and miso waste or Ranaru group and is the carbide Vapor absorption / release material containing 10 to 50% by mass of sodium chloride.   The vapor absorption / release material according to claim 1, wherein the carbide of the salt-containing organic substance is a carbide obtained by firing the salt-containing organic substance at a temperature of 300 to 1000 ° C.   The carbide of the salt-containing organic substance is a carbide obtained by further activating a carbide obtained by baking the salt-containing organic substance at a temperature of 100 to 1000 ° C at a temperature of 300 to 1000 ° C. 2. The vapor absorbing / releasing material according to 2.   The vapor absorption / release material according to any one of claims 1 to 3, wherein the salt-containing organic substance is soy sauce cake.   The vapor absorbing / releasing material according to any one of claims 1 to 4, further comprising an additive.   The vapor absorbing / releasing material according to claim 5, wherein the vapor absorbing / releasing material is molded.   The vapor absorbing / releasing material according to claim 6, which is obtained by further activation treatment at a temperature of 300 to 1000 ° C after molding.   The vapor absorption / release material according to any one of claims 5 to 7, wherein the additive is added at a ratio of 0.05 to 10 parts by mass with respect to 1 part by mass of the carbide of the salt-containing organic substance.

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