KR101680610B1 - Activated carbon adsorbent for acidic gas removal and manufacturing method the same - Google Patents
Activated carbon adsorbent for acidic gas removal and manufacturing method the same Download PDFInfo
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- KR101680610B1 KR101680610B1 KR1020150074940A KR20150074940A KR101680610B1 KR 101680610 B1 KR101680610 B1 KR 101680610B1 KR 1020150074940 A KR1020150074940 A KR 1020150074940A KR 20150074940 A KR20150074940 A KR 20150074940A KR 101680610 B1 KR101680610 B1 KR 101680610B1
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
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- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0274—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04 characterised by the type of anion
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28057—Surface area, e.g. B.E.T specific surface area
Abstract
The present invention relates to an activated carbon adsorbent for removing an acid gas and a method for producing the same, and more particularly, to a method for preparing an activated carbon adsorbent for acid gas removal, The present invention relates to an activated carbon adsorbent for acid gas removal and a method for producing the activated carbon adsorbent.
Description
The present invention relates to an activated carbon adsorbent for removing an acid gas and a method for producing the same, and more particularly, to a method for preparing an activated carbon adsorbent for acid gas removal, The present invention relates to an activated carbon adsorbent for acid gas removal and a method for producing the activated carbon adsorbent.
As industrialization progresses, air pollution and indoor air pollution become worse. Harmful substances in the air and polluted dust affect the human body and adversely affect health such as various skin diseases and respiratory diseases. Various technologies that can be controlled are being developed.
Activated carbon is a amorphous carbon which has fine pores of molecular size developed through carbonization and activation processes using carbon materials such as coconut, wood, alane, lignite and bituminous coal as raw materials, and has a large internal surface area of 1,000 m2 or more per unit g , And is an excellent porous adsorbent for adsorbing and removing various harmful substances present in air, water and soil. However, since the surface is hydrophobic, mainly nonpolar molecules are selectively adsorbed and adsorption affinity to water vapor is small, and thus it is mainly used for solvent recovery, deodorization and separation of aromatic hydrocarbons. Therefore, there is a limit to efficiently remove harmful gas or organic compounds mixed in the air.
In order to solve such a problem, there is a demand for a technique of grasping the characteristics of the harmful gas to be removed and extending the adsorption life by adding functionalities to general activated carbon. As an attempt to remove the noxious gas by adding a catalytic function to general activated carbon, impregnated activated carbon enhanced its chemical activity by supporting metal, metal salts or organic substances on activated carbon. Such impregnated activated carbon has the advantage of removing gases which are difficult to be removed by general activated carbon accompanied by neutralization reaction, chemical reaction and catalytic reaction.
Such impregnated activated carbon is generally prepared by impregnating a normal activated carbon with potassium iodide or potassium permanganate aqueous solution as a raw material.
Korean Patent Laid-Open Publication No. 10-2004-0106640 (Patent Document 1) discloses a method for treating nitrogen oxide by impregnating a carrier with an aqueous potassium permanganate solution, drying and calcining the impregnated carrier, Korean Patent Laid-Open Publication No. 10-1998-0073620 (Patent Document 2) discloses a method for treating nitrogen oxides, in which a raw activated carbon having a specific size range is impregnated with a KI aqueous solution to effectively inhibit hydrogen sulfide, Discloses a method for producing impregnated impregnated activated carbon.
The impregnated activated carbon produced by this method has a complicated process due to the firing step, and the specific surface area is reduced by impregnation of the transition metal or its salt into the aqueous solution, so that the amount of acid gas adsorbed per unit weight of the transition metal material and its salt is not high, There was still a problem of economic loss due to frequent replacement in the market.
Therefore, it is required to solve the problem that the adsorption performance is deteriorated when the acid gas is removed by the conventional impregnation method, thereby increasing the lifetime of the adsorbent, requiring an adsorbent which is simple in the production method and does not incur the cost of treatment such as waste water by impregnation In fact.
In order to solve the above-mentioned problems, the present invention is made by a conventional impregnation method, which prolongs short adsorption life, and simultaneously improves chemical adsorption power and physical adsorption power. Thus, even in an environment where the temperature of exhaust gas is high or the space velocity is high, It is an object of the present invention to provide a process for producing an activated carbon adsorbent for acid gas removal which is capable of improving the adsorbability of gas and which is simple in production process and does not generate wastewater by impregnation and is eco-friendly and easy to mass-produce.
It is another object of the present invention to provide an activated carbon adsorbent for acidic gas removal prepared by the above-described production method.
According to an aspect of the present invention, there is provided a process for preparing a composition comprising: a) preparing a first composition comprising an activated carbon and a basic metal carbonate; b) preparing a second composition comprising any one selected from copper salts or iron salts and any one selected from at least one of a manganese salt and an alkali salt; c) mixing the first composition and the second composition to produce an adsorbent; And d) drying and aging the adsorbent. The present invention also relates to a method for producing an activated carbon adsorbent for acidic gas removal.
According to an embodiment of the present invention, the step a) may further include one or more carriers selected from alumina, silica, zeolite, bentonite, zirconia, and celite.
According to one embodiment of the present invention, the in step b), the copper salt is copper chloride (CuCl 2), copper nitrate (Cu (NO 3) 2) , copper sulfate (CuSO 4), perchlorate, copper (Cu (ClO 4 ) 2 ), hydrates thereof, and mixtures thereof, and the iron salt is at least one selected from the group consisting of iron chloride (FeCl 3 ), iron nitrate (Fe (NO 3 ) 2 ), iron sulfate (FeSO 4 ) And hydrates thereof, and mixtures thereof.
According to an embodiment of the present invention, in the step b), the manganese salt is at least one selected from the group consisting of manganese chloride (MnCl 2 ), manganese nitrate (Mn (NO 3 ) 2 ), manganese sulfate (MnSO 4 ), manganese perchlorate 4 ) 2 ), hydrates thereof, and mixtures thereof, and the alkali salt may be selected from sodium hydroxide, sodium carbonate, or a mixture thereof.
According to an embodiment of the present invention, the weight ratio of activated carbon to basic carbonic acid salt in the first composition is not limited, but may be 1:10 to 1:20, and the content of the salt in the second composition is not limited, 5 to 25% by weight.
According to an embodiment of the present invention, in the step c), 40 to 60 parts by weight of the second composition may be mixed with 100 parts by weight of the first composition, but the present invention is not limited thereto.
According to an embodiment of the present invention, the aging temperature in step d) is not limited, but may be 50 to 70 ° C.
In order to accomplish the above object, the present invention relates to an activated carbon adsorbent for removing acidic gases produced by the above-described production method.
According to one embodiment of the invention, the acid gas include, but are not limited to, one kind or in a chloride fluoride (HF), hydrogen chloride (HCl), chlorine (Cl 2), sulfur dioxide (SO 2) and hydrogen sulfide (H 2 S) Two or more species can be selected.
According to an embodiment of the present invention, the specific surface area of the activated carbon adsorbent for removing acid gases is not limited by the BET method, but may range from 450 to 650 m2 / g.
According to remove acid gases according to the present invention activated carbon adsorbents and methods for their preparation for, the acid gases such as chloride, fluoride (HF), hydrogen chloride (HCl), chlorine (Cl 2), sulfur dioxide (SO 2) and hydrogen sulfide (H 2 S) The adsorption removal rate can be improved, and thus it can be usefully applied in an acid gas generating plant. It is possible to increase the impregnation amount of metals and salts thereof compared with the case where they are produced by the conventional impregnation method and it is possible to remarkably improve the adsorption amount of acid gas. Further, it does not generate wastewater such as an impregnation aqueous solution, and is environmentally friendly, and further processing steps such as wastewater treatment and firing are not required, thereby reducing the process cost.
FIG. 1 is a photograph of a surface of an activated carbon adsorbent for acidic gas production according to an embodiment of the present invention, taken by scanning electron microscope (SEM).
FIG. 2 is a photograph of a surface of an activated carbon adsorbent for acid gas removal prepared according to a comparative example of the present invention by SEM (scanning electron microscope, electron microscope). FIG.
3 is a schematic view showing a reaction system for measuring an acid gas removal rate of an activated carbon adsorbent for acidic gas production according to an embodiment of the present invention.
4 is a digital photograph of an activated carbon adsorbent for acidic gas production according to an embodiment of the present invention.
Best Mode for Carrying Out the Invention Hereinafter, a preferred embodiment and a method for measuring a physical property of an activated carbon adsorbent for removing acidic gas of the present invention and a method for producing the same will be described in detail. The present invention may be better understood by the following examples, which are for the purpose of illustrating the present invention and are not intended to limit the scope of protection defined by the appended claims.
An object of the present invention is to provide an activated carbon adsorbent for acidic gas removal which is environmentally friendly and which does not generate wastewater from the impregnation solution to improve the adsorption performance of acid gas by a simple method, As a result of the research, it was found that a first composition containing activated carbon and a basic metal carbonate and a second composition containing at least one selected from a copper salt or an iron salt and a manganese salt and an alkali salt were mixed It is possible to improve the adsorption removal rate of acidic gases such as fluoride (HF), hydrogen chloride (HCl), chlorine (Cl 2 ), sulfur dioxide (SO 2 ) and hydrogen sulfide (H 2 S) It is environmentally friendly because it does not generate wastewater such as an impregnation aqueous solution, and it can reduce the process cost because no additional process such as wastewater treatment and calcination is required And completed the present invention.
Hereinafter, one embodiment of the present invention will be described in more detail.
A method for producing an activated carbon adsorbent for acidic gas removal according to an embodiment of the present invention includes:
a) preparing a first composition comprising activated carbon and a basic metal carbonate salt;
b) one selected from copper salts or iron salts and
Preparing a second composition comprising any one selected from at least one of manganese salt and alkali salt;
c) mixing the first composition and the second composition to produce an adsorbent; And
d) drying and aging the adsorbent.
According to one embodiment of the present invention, the activated carbon can be used without limitation of the activated carbon surface area that is well known in the art. For example, the micropores are preferably 50% or more, the average pore radius is 1.0 to 2.5 nm, and the specific surface area is 800 m2 / g or more, but the present invention is not limited thereto.
In the case of using conventional activated carbon, effective adsorption ability is exhibited for neutral substances, but adsorption ability of acid or basic substances is somewhat lowered. Therefore, according to an embodiment of the present invention, it has been found that acidic gas can be effectively removed by adding a basic metal carbonate to the activated carbon.
The basic metal carbonate according to an embodiment of the present invention may be selected from basic zinc carbonate, basic copper carbonate, and basic nickel carbonate, but is not limited thereto. Preferably, it may be basic zinc carbonate.
For example, when basic zinc carbonate is used as the basic metal carbonate, adsorption experiments using an acidic gas, particularly HCl standard gas, show that the adsorption amount increases in the order of Cu <Cu - Zn composite oxide <Cu - Zn - Ag there was. Cu and Ag are comparatively expensive metals, and the cost of raw materials for industrial mass production is high. On the other hand, zinc oxide, zinc hydroxide and zinc carbonate are competitive in price. Among them, zinc carbonate is weakly alkaline, It is effective because it can induce the reaction and finally induce chemical adsorption removal in the form of zinc chloride or the like.
According to an embodiment of the present invention, the step a) is a step of preparing a first composition by mixing an activated carbon and a basic metal carbonate. The mixing method may be used without limitation as long as it is a mixing method well known in the art.
According to an embodiment of the present invention, the mixing ratio of the basic metal carbonate and the activated carbon is not limited, but the weight ratio of the activated carbon to the basic metal carbonate may be 1:10 to 1:20. When mixed in the above range, the adsorption amount of the acid gas can be maximized while maintaining the fine pores showing the adsorption capability of the activated carbon, which is effective.
According to one embodiment of the present invention, the first composition may further include a carrier for enhancing the adsorption force together with the activated carbon and the basic metal carbonate. The carrier is not limited as long as it is a carrier well known in the art. For example, one or more of alumina, silica, zeolite, bentonite, zirconia, and celite may be selected, but is not limited thereto.
According to an embodiment of the present invention, the step b) is a step of preparing a second composition comprising at least one selected from a copper salt or an iron salt and at least one selected from a manganese salt and an alkali salt.
More specifically, it is a step of dissolving a copper salt, iron salt, manganese salt and alkali salt in distilled water to prepare a mixed solution.
According to one embodiment of the invention, the copper salt, but not limited to, copper chloride (CuCl 2), copper nitrate (Cu (NO 3) 2) , copper sulfate (CuSO 4), perchlorate, copper (Cu (ClO 4) 2 ), Hydrates thereof, and mixtures thereof.
The iron salt is not limited, but may be one or more selected from the group consisting of iron chloride (FeCl 3 ), iron nitrate (Fe (NO 3 ) 2 ), iron sulfate (FeSO 4 ), hydrates thereof and mixtures thereof.
The manganese salt is not limited, but manganese chloride (MnCl 2 ), manganese nitrate (Mn (NO 3 ) 2 ), manganese sulfate (MnSO 4 ), manganese perchlorate (Mn (ClO 4 ) 2 ) And mixtures thereof, and the alkali salt may be selected from sodium hydroxide, sodium carbonate or a mixture thereof.
According to an embodiment of the present invention, the content of the salt included in the second composition is not limited, but may be preferably 2 to 25% by weight, and more preferably 10 to 15% by weight.
If the content of the salt contained in the second composition is less than 2% by weight, the adsorption amount of the acid gas may decrease. If the salt content exceeds 25% by weight, the salt may block the fine pores of the activated carbon to decrease the physical adsorption rate, There is a possibility that the adsorption performance of the adsorbent may be deteriorated. Therefore, since the content of the salt in the second composition is within the above-mentioned range, the adsorption amount and the adsorption performance of the acid gas can be remarkably improved, which is effective.
According to one embodiment of the present invention, the molar ratio of the alkali salt to the sum of the copper salt or iron salt and the manganese salt is not limited, but may be 0.9 to 1.1. When the above-mentioned range is satisfied, the adsorption performance of the acid gas and the adsorption reaction rate can be improved, which is effective.
When the molar ratio of the alkali salt to the sum of the copper salt or the iron salt and the manganese salt is less than 0.9, the pH of the adsorbent to be prepared is less than 7, so that the initial adsorption reaction rate with the acid gas is lowered, , And when it exceeds 1.1, the production of ferrous hydroxide is increased in the alkaline atmosphere of the iron hydroxide, and the improvement of the adsorption capacity of the acid gas may be insignificant.
According to an embodiment of the present invention, the step c) is a step of preparing an adsorbent by mixing the first composition and the second composition.
The first composition as a powder phase and the second composition as a liquid phase may be mixed to prepare a slurry state. The mixing method can be applied without limitation as long as it is a method well known in the art. The slurry may be extruded to form an adsorbent in a pellet, granule, or monolith form, but is not limited thereto.
In order to facilitate the extrusion molding, a lubricant or a binder may be further included. The lubricant and the binder may be applied without limitation as long as they are well known in the art. For example, inorganic binders including sodium metasilicate, sodium magnesium silicate, boehmite and the like can be selected.
According to an embodiment of the present invention, in the step c), the mixing ratio of the first composition and the second composition is not limited. However, 40 to 60 parts by weight of the second composition may be mixed per 100 parts by weight of the first composition , And more preferably 45 to 55 parts by weight. By mixing in the above-mentioned range, the adsorption performance and the adsorption amount of the acid gas can be improved while maintaining the fine pores of the activated carbon, which is effective.
If the amount of the second composition is less than 40 parts by weight, the adsorption amount of the acid gas may decrease. If the amount of the second composition is more than 60 parts by weight, the micropore of the activated carbon may be blocked to lower the physical adsorption rate, .
According to an embodiment of the present invention, the step d) is a step of drying and aging the adsorbent prepared in the step c). The drying and aging temperature is not limited, but may be 50 to 70 ° C. In the case of the conventional impregnation method, drying and calcination at a high temperature of 110 ° C or higher is necessary to dry residual water, which is a problem of high process cost. However, according to the production method of the present invention, it is possible to produce an activated carbon adsorbent excellent in the adsorption performance of acid gas only by drying and aging in the temperature range described above, and it is possible to prevent unnecessary energy consumption and reduce the process cost .
If the drying and aging temperature is less than 50 캜, drying and aging may not be sufficiently performed. If the drying and aging temperature is more than 70 캜, unnecessary energy waste may cause an increase in process cost. Therefore, Is effective.
According to another embodiment of the present invention, there can be provided an activated carbon adsorbent for acidic gas removal, which is produced according to the above-described production method. The activated carbon adsorbent for acid gas removal can effectively adsorb and remove the acidic gas known to those skilled in the art. The acid gas may be selected from, for example, at least one of fluorine (HF), hydrogen chloride (HCl), chlorine (Cl 2 ), sulfur dioxide (SO 2 ) and hydrogen sulfide (H 2 S) The present invention is not limited thereto and can be usefully applied in various acid gas generating plants.
The activated carbon adsorbent for removing acidic gas according to an embodiment of the present invention may be contained in an activated carbon adsorption tower, an air purifier or an air purifying device, and may be filled in an air purifying device or a space capable of being in air contact with the air purifying device. The product to be charged into the air purification apparatus having a small amount of air to be treated may be charged with granula (granula), and the product to be charged into the industrial activated carbon absorption tower may be pelletized or monolithic But is not limited thereto.
According to an embodiment of the present invention, the activated carbon adsorbent for removing acid gases may have a specific surface area of 450 to 650 m 2 / g measured according to the BET method. Compared with the adsorbent prepared by the conventional impregnation method, the specific surface area was reduced by the mixing method, but the specific contents of metal salts were uniformly and stably distributed on the surface of the activated carbon, so that the adsorption performance and the adsorption amount of the acid gas were remarkably improved Could know.
BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment and a method for measuring a physical property of an activated carbon adsorbent for removing acidic gases of the present invention and a method for producing the same are described in detail below.
Property measurement
1. Measurement of specific surface area (BET)
In order to measure the specific surface area of the activated carbon adsorbent for acidic gas production according to an embodiment of the present invention, the amount of nitrogen adsorption and desorption of the adsorbent pretreated under a vacuum of 200 ° C was measured with a specific surface area meter (Micromeritics, ASAP 2420, USA) The adsorption desorption curve was obtained and the specific surface area was calculated by the Bruneure-Emmett-Teller (BET) method.
2. Adsorption amount measurement
The reactor was charged in a cylindrical reactor having an inner diameter of 9.5 mm and a height of 60 mm in a reactor filled with an activated carbon adsorbent for acidic gas removal of the present invention at a charging height of about 45 mm and a charged amount of about 1.5 g. Adsorption performance of the adsorbent was measured by measuring the gas flowing out of the reactor through Toxic Gas Tansmitter (Analytical Technology, INC., Series F12, USA). The point of time when the concentration of the acid gas collected at the outlet reached 5.0 ppm was determined as the destruction time point.
[Example 1]
20 g of bentonite (IS-SUPER GEL) and 20 g of basic zinc carbonate (2ZnCO 3 .3Zn (OH) 2) were added to a mixture of 70 g of powdered activated carbon (SPC- 2 .H 2 O, basic) were mixed in a separate reactor to prepare a first composition.
5 g of ferrous sulfate heptahydrate (FeSO 4 .7H 2 O) and 0.1 g of potassium permanganate (KMnO 4 ) were dissolved in distilled water to prepare a second composition in an amount of 50 ml.
The first composition and the second composition were mixed in a separate reactor, and the mixture in a cake state was extruded into pellets using an extruder. The mixture was dried and aged at 60 ° C for 5 hours to prepare an activated carbon adsorbent for acid gas removal.
Wherein using the activated carbon for removing the produced acidic gas absorbent chloride fluoride (HF, 455μmol / mol / N 2 gas produced in the standard balance), hydrogen chloride (HCl, a standard gas prepared by 1,013μmol / mol / N 2 balance), and The adsorption performance of chlorine (standard gas prepared with Cl 2 , 1,014 μmol / mol / N 2 balance) was measured at 25 ° C. at a space velocity of 2,823 h -1 . The results are shown in Table 2 below.
[Example 2]
As shown in the following Table 1, the charging height of the acid gas was 45 mm, and the space velocity was changed to 75 cc / min at the supply flow rate. The results are shown in Table 2 below.
[Comparative Example 1]
As shown in the following Table 1, 100 g of granular activated carbon (DD-30, 3 mm) was washed with distilled water to remove fine particles in the pores and then dried in an oven at 110 ° C.
5.0 g of ferrous sulfate heptahydrate (FeSO 4 .7H 2 O), 0.1 g of potassium permanganate (KMnO 4 ) and 3.0 g of basic zinc carbonate (2ZnCO 3 .3Zn (OH) 2 .H 2 O, basic) To prepare an impregnation solution. The impregnated solution was impregnated with dried granular activated carbon for 1 hour and then dried at 60 ° C for 4 hours to prepare an activated carbon adsorbent for acidic gas removal.
Wherein using the activated carbon for removing the produced acidic gas absorbent chloride fluoride (HF, 455μmol / mol / N 2 gas produced in the standard balance), hydrogen chloride (HCl, a standard gas prepared by 1,013μmol / mol / N 2 balance), and The adsorption performance of chlorine (standard gas prepared with Cl 2 , 1,014 μmol / mol / N 2 balance) was measured at 25 ° C. at a space velocity of 2,823 h -1 . The results are shown in Table 2 below.
[Comparative Example 2]
The results are shown in Table 2, except that the content of iron salts was changed as shown in Table 1 below.
[Comparative Example 3]
The results are shown in Table 2, except that the contents of iron salts and manganese salts were changed as shown in Table 1 below.
[Comparative Example 4]
The results are shown in Table 2 below, except that the basic zinc carbonate and manganese salt were excluded, as shown in Table 1 below.
[Table 1]
[Table 2]
As shown in Table 2, the activated carbon adsorbent for acid gas removal of Examples 1 and 2 was prepared by the mixing method, so that the adsorption amount and the adsorption performance of the acid gas were remarkably higher than those of the adsorbent prepared by the impregnation method as in Comparative Example 1 .
In addition, as shown in Comparative Examples 2 and 3, it was found that not only the breakage time but also the adsorption amount was remarkably decreased when the salt content was out of the range. As shown in Comparative Example 4, the basic zinc carbonate and manganese salt compositions were not employed It was found that it was not easy to adsorb the acid gas due to the adsorption amount similar to that of the adsorbent prepared by the impregnation method as in Comparative Example 1. [
1 and 2, SEM photographs of the surface of an activated carbon adsorbent for acid gas removal according to Example 1 of the present invention are shown in FIG. 1, SEM photograph of the surface of activated carbon adsorbent for degassing. As shown in FIG. 1, although the salt particles are dispersed and evenly distributed throughout, the distribution of the salt particles is irregular in the case of FIG. 2, and the phenomenon of blocking the activated carbon fine pores can be confirmed.
While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Accordingly, the above description should not be construed as limiting the scope of the present invention defined by the limits of the following claims.
Claims (10)
b) one selected from copper salts or iron salts and
Preparing a second liquid composition containing at least one selected from the group consisting of manganese salt and alkali salt;
c) mixing the first composition and the second composition to prepare a slurry;
d) extruding the slurry to produce an adsorbent; And
e) drying and aging the adsorbent,
Wherein the second composition is 40 to 60 parts by weight based on 100 parts by weight of the first composition in the step c).
Wherein the step a) further comprises one or more carriers selected from alumina, silica, zeolite, bentonite, zirconia, and celite.
In the step b), the copper salt may be at least one selected from the group consisting of copper chloride (CuCl 2 ), copper nitrate (Cu (NO 3 ) 2 ), copper sulfate (CuSO 4 ), copper perchlorate (Cu (ClO 4 ) 2 ) , And mixtures thereof.
The iron salt may be one or more selected from the group consisting of iron chloride (FeCl 3 ), iron nitrate (Fe (NO 3 ) 2 ), iron sulfate (FeSO 4 ), hydrates thereof, Gt;
In step b), the manganese salt is at least one selected from the group consisting of manganese chloride (MnCl 2 ), manganese nitrate (Mn (NO 3 ) 2 ), manganese sulfate (MnSO 4 ), manganese perchlorate (Mn (ClO 4 ) 2 ) Or a mixture thereof, and may be one or more selected from the above-
Wherein the alkali salt is sodium hydroxide, sodium carbonate or a mixture thereof.
The weight ratio of the basic carbonic acid metal salt to the activated carbon in the first composition is from 1:10 to 1:20,
Wherein the amount of the salt contained in the second composition is 5 to 25% by weight.
Wherein the aging temperature in the step (e) is 50 to 70 ° C.
Wherein the acidic gas is one or two or more selected from the group consisting of fluoride (HF), hydrogen chloride (HCl), chlorine (Cl 2 ), sulfur dioxide (SO 2 ) and hydrogen sulfide (H 2 S).
The activated carbon adsorbent for removing acid gases has an specific surface area of 450 to 650 m < 2 > / g as measured according to the BET method.
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| KR101870134B1 (en) * | 2018-01-16 | 2018-06-25 | 한국지질자원연구원 | Manufacturing method of acid gas absorbent and acid gas absorbent manufactured thereby |
| KR20190073798A (en) * | 2017-12-19 | 2019-06-27 | 한밭대학교 산학협력단 | Inorganic adsorbent for removal of hydrogen sulfide |
| KR102145394B1 (en) | 2020-03-23 | 2020-08-19 | 한소 주식회사 | High performance spray-impregnated activated carbon impregnated with various metal salts and method for manufacturing the same |
| KR102146628B1 (en) * | 2019-06-12 | 2020-08-20 | 주식회사 에스알디글로벌 | Adsorbent for removing acidic gas and Method for preparing the same |
| KR102161049B1 (en) * | 2019-05-31 | 2020-09-29 | 윤남식 | Process for production of dry-type desulfurizing agent for removing hydrogen sulfide from a high concentration biogas |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190073798A (en) * | 2017-12-19 | 2019-06-27 | 한밭대학교 산학협력단 | Inorganic adsorbent for removal of hydrogen sulfide |
| KR102051502B1 (en) | 2017-12-19 | 2019-12-04 | 한밭대학교 산학협력단 | Inorganic adsorbent for removal of hydrogen sulfide |
| KR101870134B1 (en) * | 2018-01-16 | 2018-06-25 | 한국지질자원연구원 | Manufacturing method of acid gas absorbent and acid gas absorbent manufactured thereby |
| KR102161049B1 (en) * | 2019-05-31 | 2020-09-29 | 윤남식 | Process for production of dry-type desulfurizing agent for removing hydrogen sulfide from a high concentration biogas |
| KR102146628B1 (en) * | 2019-06-12 | 2020-08-20 | 주식회사 에스알디글로벌 | Adsorbent for removing acidic gas and Method for preparing the same |
| KR102145394B1 (en) | 2020-03-23 | 2020-08-19 | 한소 주식회사 | High performance spray-impregnated activated carbon impregnated with various metal salts and method for manufacturing the same |
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