Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • 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
  • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
  • B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
  • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
  • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
  • B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
  • B01D53/10—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds with dispersed adsorbents
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • 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
  • B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
  • B01J20/043—Carbonates or bicarbonates, e.g. limestone, dolomite, aragonite
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • 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
  • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
  • B01J20/16—Alumino-silicates
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • 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
  • B01J20/28014—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 form
  • B01J20/28016—Particle form
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • 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
  • B01J20/28064—Surface area, e.g. B.E.T specific surface area being in the range 500-1000 m2/g
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
  • C01B33/00—Silicon; Compounds thereof
  • C01B33/20—Silicates
  • C01B33/26—Aluminium-containing silicates, i.e. silico-aluminates
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
  • F23J15/00—Arrangements of devices for treating smoke or fumes
  • F23J15/003—Arrangements of devices for treating smoke or fumes for supplying chemicals to fumes, e.g. using injection devices
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
  • F23J15/00—Arrangements of devices for treating smoke or fumes
  • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2251/00—Reactants
  • B01D2251/30—Alkali metal compounds
  • B01D2251/304—Alkali metal compounds of sodium
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2251/00—Reactants
  • B01D2251/60—Inorganic bases or salts
  • B01D2251/606—Carbonates
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
  • B01D2253/10—Inorganic adsorbents
  • B01D2253/106—Silica or silicates
  • B01D2253/108—Zeolites
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2257/00—Components to be removed
  • B01D2257/20—Halogens or halogen compounds
  • B01D2257/204—Inorganic halogen compounds
  • B01D2257/2045—Hydrochloric acid
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2258/00—Sources of waste gases
  • B01D2258/02—Other waste gases
  • B01D2258/0283—Flue gases
  • B01D2258/0291—Flue gases from waste incineration plants
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
  • B01D53/34—Chemical or biological purification of waste gases
  • B01D53/46—Removing components of defined structure
  • B01D53/48—Sulfur compounds
  • B01D53/50—Sulfur oxides
  • B01D53/508—Sulfur oxides by treating the gases with solids
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
  • B01D53/34—Chemical or biological purification of waste gases
  • B01D53/46—Removing components of defined structure
  • B01D53/68—Halogens or halogen compounds
  • B01D53/685—Halogens or halogen compounds by treating the gases with solids
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
  • B01D53/34—Chemical or biological purification of waste gases
  • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
  • B01D53/81—Solid phase processes
  • B01D53/83—Solid phase processes with moving reactants
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
  • C01P2004/00—Particle morphology
  • C01P2004/60—Particles characterised by their size
  • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
  • C01P2006/00—Physical properties of inorganic compounds
  • C01P2006/12—Surface area
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
  • F23J2219/00—Treatment devices
  • F23J2219/20—Non-catalytic reduction devices

Definitions

• the present invention relates to treatment of acidic gases such as harmful hydrogen chloride and sulfur oxides generated in combustion facilities such as municipal waste waste incinerators, industrial waste incinerators, power generation boilers, carbonization furnaces, and private factories.
• acidic gases such as harmful hydrogen chloride and sulfur oxides generated in combustion facilities
• combustion facilities such as municipal waste waste incinerators, industrial waste incinerators, power generation boilers, carbonization furnaces, and private factories.
• Exhaust gas containing acidic gases such as harmful hydrogen chloride and sulfur oxides is treated with a treating agent containing an alkaline agent such as calcium hydroxide (also called slaked lime) or sodium bicarbonate (also called sodium bicarbonate or sodium bicarbonate). Thereafter, the dust is removed by a dust collector such as a bag filter (BF) and then discharged from the chimney.
• a treating agent containing an alkaline agent such as calcium hydroxide (also called slaked lime) or sodium bicarbonate (also called sodium bicarbonate or sodium bicarbonate).
• Sodium hydrogen carbonate is an alkali agent that is more reactive than calcium hydroxide, can treat acidic gas stably, has little unreacted content, and is effective in reducing environmental impact.
• sodium bicarbonate contains ammonia used as an impurity in its production process. For this reason, when formulating an acidic gas treating agent, ammonia gas is released from the sodium hydrogen carbonate due to an increase in pH, which may cause a problem of deteriorating the working environment. Further, such an acid gas treating agent can release ammonia gas even when stored in a high temperature environment such as summer, and can deteriorate the use environment.
• silica may be mixed in order to improve the decrease in fluidity.
• ammonia gas derived from sodium hydrogen carbonate is not solved. Rather, synthetic silica or the like can release ammonia gas and make the problem worse.
• the present invention has been made in view of the above circumstances, and an acidic gas treating agent capable of suppressing problems caused by ammonia gas while maintaining or improving the fluidity of sodium hydrogen carbonate, a method for producing the same, and an acidic gas It aims at providing the additive for processing agents.
• aluminosilicate removes ammonia gas derived from sodium hydrogen carbonate and contributes to the fluidity of sodium hydrogen carbonate, thereby completing the present invention.
• the present invention provides the following.
• An additive for an acid gas treating agent which is made of aluminosilicate and is used for removing ammonia gas released from sodium hydrogen carbonate.
• a method for producing an acid gas treating agent comprising a step of mixing and pulverizing aluminosilicate and sodium hydrogencarbonate to form a preparation.
• problems due to ammonia gas can be suppressed while maintaining or improving the fluidity of sodium bicarbonate.
• the acidic gas treating agent of the present invention contains sodium hydrogen carbonate and aluminosilicate.
• the aluminosilicate suppresses the decrease in fluidity of sodium hydrogen carbonate while removing ammonia gas derived from sodium hydrogen carbonate. For this reason, according to the acidic gas treating agent of this invention, the problem by ammonia gas is suppressed and fluidity
• Aluminosilicate is a substance with a structure in which some silicon atoms in silicate are replaced with aluminum atoms, and is generally used as a gas adsorbent or ion adsorbent to adsorb acid gas and ammonia gas. It is known to do.
• the mechanism by which ammonia gas is adsorbed and reduced by aluminosilicate is the physical adsorption of ammonia gas to aluminosilicate and / or the chemical adsorption of ammonium ions by the ion exchange action of monovalent cations possessed by aluminosilicate. It is thought that.
• Such aluminosilicates are, for example, zeolite, bentonite, kaolinite, halloysite, antigolite, piolite, talc, montmorillonite, sabonite, permiculite, muscovite, baragonite, illite, phlogopite, biotite, margarite, It may be one or more selected from the group consisting of xanthophyllite, donpasite, sudowite, clinochlore, chamosite, sepiolite, palygorskite, imogolite, allophane, and hysingerite. From the viewpoint of ammonia gas removal efficiency or fluidity, zeolite or bentonite is preferable, and zeolite is particularly preferable.
• the aluminosilicate used as a raw material for the acid gas treating agent is preferably a powder from the viewpoint of ease of formulation of the acid gas treating agent.
• the average particle diameter of the powder is not particularly limited, but is preferably 800 ⁇ m or less, and preferably 0.05 ⁇ m to 500 ⁇ m in order to improve the removal efficiency of ammonia gas or the fluidity of the acidic gas treating agent. More preferably, it is 0.1 to 200 ⁇ m, more preferably 1 to 3 ⁇ m.
• the average particle size in the present specification is determined by measurement using a diffraction type particle size distribution analyzer SALD-3100 / 2200 manufactured by Shimadzu Corporation.
• the specific surface area of the aluminosilicate is not particularly limited, but it is 500 cm 2 / in as measured by the SS-100 model manufactured by Shimadzu Corporation because of the improvement in ammonia gas removal efficiency or the ease of handling as an additive for acid gas treatment agents. is preferably g or more, more preferably from 1,000cm 2 / g ⁇ 10,000,000cm 2 / g, 1,700cm 2 / g ⁇ 1,000,000cm 2 / g and even more preferably, it is most preferable 20,000cm 2 / g ⁇ 100,000cm 2 / g.
• the aluminosilicate is contained in the acidic gas treating agent in such a manner that the ammonia gas derived from sodium hydrogen carbonate is removed and the flowability of sodium hydrogen carbonate is suppressed.
• the aspect is not particularly limited as long as ammonia gas can be removed.
• the aluminosilicate and the sodium hydrogen carbonate are mixed uniformly or non-uniformly.
• the aluminosilicate is contained in an amount of 0.1 to 10% by mass with respect to sodium bicarbonate.
• the aluminosilicate is contained in an amount of 0.1% by mass or less with respect to sodium hydrogen carbonate, it is difficult to sufficiently suppress the problem of ammonia gas of the acidic gas treating agent.
• the content of the aluminosilicate is more preferably 0.1 to 7% by mass with respect to the acid gas treating agent.
• the amount is more preferably 0.5 to 4% by mass, and most preferably 1 to 2% by mass.
• the content of the aluminosilicate is created by identifying the aluminosilicate from the peak in the X-ray diffraction of the acidic gas treating agent, and the peak area and the concentration of the aluminosilicate sample in the X-ray diffraction. Based on the calibration curve of the aluminosilicate, it is determined from the peak area of the aluminosilicate in the X-ray diffraction of the acidic gas treating agent.
• the acid gas treatment agent is preferably a powder from the viewpoint of acid gas treatment efficiency. If the average particle size of the powder is too large, the acid gas treatment efficiency is low, and if it is too small, the handling is complicated. For this reason, the average particle diameter of the acidic gas treating agent is preferably 0.1 ⁇ m to 2 mm, more preferably 1 ⁇ m to 300 ⁇ m.
• Sodium hydrogen carbonate used as a raw material for the acid gas treating agent is preferably a powder from the viewpoint of acid gas treatment efficiency.
• the average particle size of the powder may be 0.01 ⁇ m to 500 ⁇ m, more preferably 0.011 ⁇ m to 100 ⁇ m, from the viewpoint of improving the reactivity with the acidic gas.
• the acidic gas treating agent of the present invention preferably further contains silica.
• silica is used in combination with sodium hydrogen carbonate, the fluidity and storage stability of the acidic gas treating agent can be further improved as compared with the case of silica alone. Since aluminosilicate has a hygroscopic effect, when combined with silica, moisture that causes solidification of sodium bicarbonate is removed, and the fluidity and storage stability of the acid gas treatment agent are further improved. It is done.
• the content of silica is preferably 20% by mass or less based on sodium hydrogen carbonate from the viewpoint of improving the fluidity of the acid gas treating agent.
• the silica is more preferably contained in an amount of 0.1 to 5% by mass with respect to sodium bicarbonate, from the viewpoint of improving the fluidity of the acidic gas treating agent and preventing sticking and consolidation. Most preferably, it is contained in an amount of ⁇ 2% by weight.
• the silica content is based on a silica calibration curve prepared from the silica peak area and its concentration in X-ray diffraction after identifying silica from the peak in X-ray diffraction of the acidic gas treating agent. The peak area of silica in the X-ray diffraction of the acidic gas treating agent is determined.
• the silica may be either synthetic silica or natural silica, but is preferably synthetic silica in order to improve the fluidity and storage stability of sodium bicarbonate.
• the method for synthesizing silica is not particularly limited, and may be dry or wet.
• Silica may be either amorphous or crystalline, but is preferably amorphous in order to improve the fluidity of sodium bicarbonate.
• silica may be either hydrophilic or hydrophobic, but is preferably hydrophilic in order to improve the flowability of sodium bicarbonate.
• Synthetic silica may contain ammonia used as an impurity in its production process, but the problem of ammonia gas derived from synthetic silica is simultaneously suppressed by the aluminosilicate, which is an additive for the acidic gas treating agent of the present invention. Is done.
• the acidic gas treating agent may further include calcium hydroxide, activated carbon for adsorbing and treating dioxin in the exhaust gas.
• the method for using the acid gas treating agent of the present invention is not particularly limited, and may be conventional.
• the spray position of the acid gas treating agent may be upstream of a dust collector such as a bag filter or an electric dust collector.
• the addition amount of the acid gas treatment agent is controlled according to the calculated value by measuring the sulfur sulfide and / or hydrogen chloride concentration in the exhaust gas before addition of the acid gas treatment agent or in the exhaust gas downstream of the dust collector. Is preferred.
• an acid gas treating agent is added so that sodium hydrogen carbonate is equivalent to 0.5 to 3 equivalents of the total amount of hydrogen chloride and sulfur oxide, which are the main acid gases generated in the combustion facility.
• the acid gas treating agent is added so as to be 0.7 to 1.5 equivalents.
• the manufacturing method of the acidic gas processing agent which concerns on this invention includes the process of mixing and grind
• the method and equipment for mixing the aluminosilicate and sodium hydrogen carbonate are not particularly limited.
• the aluminosilicate and sodium hydrogen carbonate are pulverized and mixed before being put into a polyethylene sealed container. Good.
• mixing and pulverization may be performed in parallel, or pulverization may be performed after mixing.
• the pulverization may be performed by a conventional method.
• the aluminosilicate is preferably mixed in an amount of 0.1 to 10% by mass with respect to sodium bicarbonate.
• the aluminosilicate is more preferably blended in an amount of 0.5 to 4% by mass with respect to the acid gas treating agent from the balance between suppression of the problem of ammonia gas in the acid gas treating agent and the acid gas treating efficiency. Most preferably, it is blended in an amount of 1 to 2% by mass.
• the aluminosilicate used in the method for producing an acidic gas treating agent of the present invention preferably has an average particle size of 800 ⁇ m or less or a specific surface area of 500 cm 2 / g or more before mixing or pulverization.
• silica may be further mixed together with aluminosilicate and sodium hydrogen carbonate.
• the fluidity and storage stability of the acid gas treating agent are further improved as compared with the case where silica is used alone.
• the initial silica may be mixed simultaneously with the mixing of the aluminosilicate and the sodium hydrogen carbonate, or when formulating the acidic gas treating agent. From the viewpoint of maintaining fluidity, the aluminosilicate and the hydrogen carbonate are mixed. It is preferable to mix simultaneously with the mixing of sodium.
• Sodium bicarbonate, aluminosilicate, and silica may be mixed with each other, or may be pulverized after mixing.
• the additive for acid gas treating agent of the present invention is made of aluminosilicate and is used for removing ammonia gas released from sodium hydrogen carbonate.
• the average particle diameter of the aluminosilicate is not particularly limited, but is preferably 800 ⁇ m or less, more preferably 500 ⁇ m to 0.05 ⁇ m, and even more preferably 200 ⁇ m to 0.1 ⁇ m.
• the specific surface area of the aluminosilicate is not particularly limited, but is preferably 500 cm 2 / g or more as measured by Shimadzu SS-100 model, and is preferably 1,000 cm 2 / g to 10,000,000 cm 2. more preferably from / g, more preferably at 1,700cm 2 / g ⁇ 1,000,000cm 2 / g.
• the amount of the aluminosilicate added to the acidic gas treating agent is not particularly limited depending on the amount of ammonia gas released from the acidic gas treating agent, but is 0.1 to 10% by mass.
• the aluminosilicate is blended in an amount of 0.1% by mass or less with respect to sodium hydrogen carbonate, it is difficult to sufficiently suppress the problem of ammonia gas of the acid gas treating agent. Moreover, the fluidity
• the aluminosilicate is more preferably blended in an amount of 0.1 to 7% by mass with respect to the acid gas treating agent. More preferably, it is blended in an amount of 0.5 to 4% by mass, and most preferably in an amount of 1 to 2% by mass.
• the acid gas treating agent to which the additive for acid gas treating agent of the present invention is added may contain silica in addition to sodium bicarbonate.
• silica in addition to sodium bicarbonate.
• Zeolite (Zeolite # 70, BET specific surface area of 2,000 cm 2 / g, average particle size of 200 ⁇ m or less): manufactured by Nitto Flour Industry Co., Ltd. 2) Zeolite (Zeolite # 600, BET specific surface area 17,800 cm 2 / g, average particle size 1.92 ⁇ m): manufactured by Nitto Flour Industry Co., Ltd. 3) Zeolite (Zeolite # 2300, BET specific surface area 23,100 cm 2 / g, average particle size 1.25 ⁇ m): manufactured by Nitto Flour Industry Co., Ltd.
• Bentonite (Kunigel V1, BET specific surface area 1,500 cm 2 / g, average particle size of 60 ⁇ m or less): manufactured by Kunimine Kogyo Co., Ltd.
• Hydrophilic synthetic silica (Tokusil U): manufactured by Tokuyama Corporation.
• the BET specific surface area of each additive was measured with SS-100 (manufactured by Shimadzu Corporation), and the average particle diameter was measured with a Shimadzu Corporation diffraction type particle size distribution analyzer SALD-3100 / 2200.
• Table 1 shows the evaluation of ammonia gas reduction by aluminosilicate.
• the numerical value in the parenthesis in the composition ratio in Table 1 is a ratio with respect to sodium bicarbonate.
• n. d. Indicates that ammonia gas could not be detected, and tr indicates that the ammonia gas could be detected but was so small that it could not be quantified.
• silica gel was able to reduce the amount of ammonia gas more efficiently than bentonite as aluminosilicate.
• the additive used in the ammonia gas concentration reduction evaluation derived from the acid gas treatment agent was mixed at a predetermined ratio, and the angle of repose and dip angle were measured using a powder tester PT-D type (manufactured by Hosokawa Micron). The effect of improving fluidity was evaluated. The measurement procedure follows the instructions of the powder tester, and the measured values are shown in Table 2.
• Compression adhesion evaluation The sample after being allowed to stand for 21 days is vibrated 10 times with a 2 mm sieve (10 cm at a time), and the residue on the sieve is displayed as a percentage. The storage stability of the acid gas treating agent was evaluated from the pressure-bonding property (%). The measured values are shown in Table 2.
• the numerical value in the parenthesis in the composition ratio in Table 2 is an amount with respect to sodium bicarbonate.
• “ ⁇ ” in the fluidity indicates unmeasured.
• Example 1 From Example 1, Example 3 and Comparative Example 1 in Table 2, it was found that the repose angle and the collapse angle of the acid gas treating agent containing aluminosilicate were small and excellent in fluidity. In addition, from Example 1 and Example 3, the repose angle and collapse angle of the acid gas treating agent containing an aluminosilicate having a smaller average particle diameter or a larger specific surface area are smaller and excellent in fluidity. all right.
• Example 3 and Example 4 in Table 2 From Example 1 and Example 2, Example 3 and Example 4 in Table 2, the repose angle and dip angle of the acid gas treating agent containing silica with aluminosilicate are smaller and better in fluidity. all right.
• Example 3 From the comparison of Example 3 and Comparative Example 1 in Table 2 and Examples 2, 4 and Comparative Example 2, the acidic gas treating agent containing aluminosilicate has a pressure-bonding adhesiveness than the acidic gas treating agent not containing aluminosilicate. Low and storage stability was improved.
• the acidic gas treating agent further containing silica in the aluminosilicate has low pressure-bonding property and difficult to consolidate with respect to the acidic gas treating agent not containing silica.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Analytical Chemistry (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Inorganic Chemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Dispersion Chemistry (AREA)
• Solid-Sorbent Or Filter-Aiding Compositions (AREA)
• Treating Waste Gases (AREA)
• Silicates, Zeolites, And Molecular Sieves (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=49161316

Family Applications (1)

Country Status (4)

Cited By (2)

Families Citing this family (4)

Citations (8)

Family Cites Families (2)

• 2012
  • 2012-03-16 JP JP2012060693A patent/JP5751199B2/ja active Active
• 2013
  • 2013-03-14 CN CN201380014123.4A patent/CN104245118A/zh active Pending
  • 2013-03-14 WO PCT/JP2013/057296 patent/WO2013137416A1/ja not_active Ceased
  • 2013-03-15 TW TW102109270A patent/TWI541063B/zh active

Patent Citations (8)

Also Published As

Similar Documents

Legal Events