CN112755955A - Preparation method of light honeycomb molecular sieve purification module - Google Patents
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- CN112755955A CN112755955A CN202011573130.6A CN202011573130A CN112755955A CN 112755955 A CN112755955 A CN 112755955A CN 202011573130 A CN202011573130 A CN 202011573130A CN 112755955 A CN112755955 A CN 112755955A
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- 239000002808 molecular sieve Substances 0.000 title claims abstract description 62
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 238000000746 purification Methods 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000001125 extrusion Methods 0.000 claims abstract description 31
- 238000005187 foaming Methods 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 238000001354 calcination Methods 0.000 claims abstract description 16
- 239000004088 foaming agent Substances 0.000 claims abstract description 15
- 239000004094 surface-active agent Substances 0.000 claims abstract description 13
- 239000011230 binding agent Substances 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 11
- 239000011148 porous material Substances 0.000 claims abstract description 9
- 238000007670 refining Methods 0.000 claims abstract 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 9
- 239000002202 Polyethylene glycol Substances 0.000 claims description 8
- 229920001223 polyethylene glycol Polymers 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 7
- 239000004927 clay Substances 0.000 claims description 6
- 239000006260 foam Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000005995 Aluminium silicate Substances 0.000 claims description 4
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 4
- 235000012211 aluminium silicate Nutrition 0.000 claims description 4
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 4
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 4
- 238000004898 kneading Methods 0.000 claims description 2
- 230000001413 cellular effect Effects 0.000 claims 2
- 235000010469 Glycine max Nutrition 0.000 claims 1
- 244000068988 Glycine max Species 0.000 claims 1
- 235000013312 flour Nutrition 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 abstract description 9
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 235000011187 glycerol Nutrition 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 5
- 238000003723 Smelting Methods 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 235000019764 Soybean Meal Nutrition 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004455 soybean meal Substances 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 230000002431 foraging effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
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- 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
- B01J20/2803—Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products
-
- 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
- B01J20/28042—Shaped bodies; Monolithic structures
- B01J20/28045—Honeycomb or cellular structures; Solid foams or sponges
-
- 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
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Catalysts (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
本发明实施例公开了一种轻质蜂窝分子筛净化模块的制备方法，包括：样品初混步骤：将称取的分子筛原粉、粘结剂、发泡剂放入混料机中进行搅拌混料至均匀；样品练泥步骤：再加入称取的表面活性剂继续搅拌，将泥状的坯料投入炼泥机中挤出；挤出成型步骤：将炼好的泥料放入低压真空挤出机中进行成型挤出；低温干燥步骤：将湿润坯体置于低温干燥的环境下；低温发泡步骤：将湿润坯体进行低温发泡；煅烧步骤：将坯料进行高温煅烧，得到轻质蜂窝分子筛。本发明通过人为控制发泡造孔，获得更多的中空结构，从而降低蜂窝分子筛的整体密度，增加蜂窝分子筛模块的比表面积，更加有利于废气成分与蜂窝分子筛的接触吸附，提升了单位有效吸附容量。
The embodiment of the present invention discloses a preparation method of a light honeycomb molecular sieve purification module, which includes: a sample initial mixing step: putting the weighed molecular sieve raw powder, a binder and a foaming agent into a mixer for stirring and mixing Steps of mud refining the sample: add the weighed surfactant and continue stirring, and put the mud-like billet into the mud mixer for extrusion; extrusion molding step: put the refined mud into the low-pressure vacuum extruder low temperature drying step: placing the wet green body in a low temperature drying environment; low temperature foaming step: low temperature foaming the wet green body; calcination step: calcining the green body at high temperature to obtain a lightweight honeycomb molecular sieve . The invention obtains more hollow structures by artificially controlling the foaming and pore formation, thereby reducing the overall density of the honeycomb molecular sieve, increasing the specific surface area of the honeycomb molecular sieve module, which is more conducive to the contact adsorption between the exhaust gas components and the honeycomb molecular sieve, and improves the unit effective adsorption. capacity.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a preparation method of a light honeycomb molecular sieve purification module.
Background
Molecular sieves have found wide application in the fields of catalysis, adsorption and the like due to their advantages of thermal stability, acid resistance, excellent selectivity and the like. However, the traditional molecular sieve is mainly in powder or granular form, so that the application field and the application range of the traditional molecular sieve are greatly limited, and especially in the field of environmental protection treatment, the granular molecular sieve has large filling resistance and restricts the application of material engineering.
The honeycomb material is a breakthrough of a molecular sieve applied in the field of environmental protection, and has the advantages of good permeability, low resistance, convenient filling, good mechanical strength and the like. But also has the defects that compared with the honeycomb activated carbon with the same volume, the honeycomb activated carbon has the problems of low adsorption capacity, large stacking density and high price, and has great influence on the replacement of the honeycomb activated carbon by the honeycomb molecular sieve in the environmental protection engineering.
Therefore, the effective adsorption capacity of the unit volume of the honeycomb molecular sieve is increased, the stacking density of the honeycomb molecular sieve is reduced, the material utilization rate is improved, the cost is reduced, and the method becomes an important breakthrough for promoting the application of the honeycomb molecular sieve.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide a preparation method of a light honeycomb molecular sieve purification module so as to obtain more molecular sieve contact areas and improve the effective adsorption capacity per unit.
In order to solve the technical problem, an embodiment of the present invention provides a preparation method of a light honeycomb molecular sieve purification module, including:
a sample initial mixing step: weighing the following raw materials in percentage by weight: 60-80% of molecular sieve raw powder, 25-15% of binder, 10-3% of surfactant and 5-2% of foaming agent; putting the weighed molecular sieve raw powder, a binder and a foaming agent into a mixer, stirring and mixing the materials uniformly, wherein the binder is clay;
a sample pugging step: adding the weighed surfactant, continuously stirring, putting the uniformly stirred mud-shaped blank into a mud mill, repeatedly mixing and extruding to obtain the well-mixed mud material, and controlling the temperature of the mud material to be
Coarse smelting is repeated for 5 times, and vacuum degree is
An extrusion molding step: putting the smelted pug into a low-pressure vacuum extruder for molding and extruding to obtain a wet blank;
and (3) low-temperature drying: placing the wet green body in a low-temperature drying environment, drying to remove excessive water, and reducing the water content of the wet green body to 18%;
and (3) low-temperature foaming step: foaming the wet blank at a low temperature of 80-90 ℃ for 24h, and naturally cooling to room temperature to obtain a blank containing a naturally air-dried foam;
and (3) calcining: and (3) calcining the blank at high temperature to break the foaming body in the heating process to form more pore structures, keeping the temperature for 6 hours, and naturally cooling to room temperature to obtain the light honeycomb molecular sieve.
Further, the stirring time in the sample preliminary mixing step was 20 minutes, and the temperature was controlled to be 30 ℃.
Further, stirring and kneading in the sample pugging step
The temperature is controlled to be 35 ℃, and the stirring speed is 50 r/min.
Further, in the extrusion molding step, the temperature is controlled to be 30 ℃ during extrusion, the extrusion rate is 20mm/s, and the extrusion pressure is controlled
Further, in the low-temperature drying step, the temperature is controlled to be 30 +/-5 ℃, and the humidity is kept to be
The wind speed is lower than 2m/s, and the light is avoided; controlling the water loss rate of the wet blank to be 0.5%/d, ventilating once every 4 hours
Further, in the calcining step, the temperature rising rate is 3 ℃/min, the temperature is raised from the room temperature to 550 ℃ for calcining, and the temperature is kept at 550 ℃ for 6 h.
Further, the clay was 1250 mesh calcined kaolin.
Further, the foaming agent is one or more of sodium carboxymethylcellulose and soybean meal.
Further, the surfactant is composed of water, glycerol, polyethylene glycol and a silica sol solution, and the surfactant comprises the following components in percentage by mass: 70-80% of water, 10-15% of silica sol and 5-10% of glycerin and polyethylene glycol.
The invention has the beneficial effects that: according to the invention, by adding the organic binder and the foaming agent, on the basis of not influencing the mechanical strength of the whole structure of the honeycomb molecular sieve, more hollow structures are obtained by artificially controlling foaming and pore-forming, so that the whole density of the honeycomb molecular sieve is reduced, the specific surface area of a honeycomb molecular sieve module is increased, the contact adsorption of waste gas components and the honeycomb molecular sieve is facilitated, and the unit effective adsorption capacity is improved.
Drawings
FIG. 1 is a flow chart of a method of making a lightweight honeycomb molecular sieve purification module according to an embodiment of the present invention.
FIG. 2 is a schematic representation of the BET multipoint method specific surface area of a honeycomb molecular sieve in accordance with an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict, and the present invention is further described in detail with reference to the drawings and specific embodiments.
If directional indications (such as up, down, left, right, front, and rear … …) are provided in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the movement, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only used for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
Referring to fig. 1, the preparation method of the lightweight honeycomb molecular sieve purification module according to the embodiment of the present invention includes a sample primary mixing step, a sample pugging step, an extrusion molding step, a low temperature drying step, a low temperature foaming step, and a calcining step.
A sample initial mixing step: weighing the following raw materials in percentage by weight: 60-80% of molecular sieve raw powder, 25-15% of binder, 10-3% of surfactant and 5-2% of foaming agent; and putting the weighed molecular sieve raw powder, the binder and the foaming agent into a mixer, and stirring and mixing the materials uniformly, wherein the binder is clay. The invention uses natural zeolite or artificially synthesized molecular sieve raw powder, and because the molecular sieve raw powder is powdery, the direct application is greatly limited, and particularly in the field of environmental protection, the powdery purifying material has large filling resistance and serious material loss, thereby greatly restricting the engineering application of the molecular sieve. According to the invention, more hollow structures are obtained by co-extruding and foaming the molecular sieve, the adhesive and the foaming agent, so that the overall density of the molecular sieve honeycomb module is reduced, the specific surface area of the molecular sieve module is increased, and the contact adsorption of waste gas components and the molecular sieve is facilitated.
A sample pugging step: adding the weighed surfactant, continuously stirring, putting the uniformly stirred mud-shaped blank into a mud mill, repeatedly mixing and extruding to obtain the well-mixed mud material, and controlling the temperature of the mud material to be
Coarse smelting is repeated for 5 times, and vacuum degree is
An extrusion molding step: and (3) putting the smelted pug into a low-pressure vacuum extruder for molding and extruding to obtain a wet blank.
And (3) low-temperature drying: and (3) placing the wet green body in a low-temperature drying environment, drying to remove excessive water, and reducing the water content of the wet green body to 18%.
And (3) low-temperature foaming step: and (3) foaming the wet blank at a low temperature of 80-90 ℃, keeping the temperature for 24h, and naturally cooling to room temperature to obtain a blank containing the naturally air-dried foam.
And (3) calcining: and (3) calcining the blank at high temperature to break the foaming body in the heating process to form more pore structures, keeping the temperature for 6 hours, and naturally cooling to room temperature to obtain the light honeycomb molecular sieve purification module.
The invention relates to a light honeycomb molecular sieve prepared by combining a foaming principle on the basis of honeycomb forming of the molecular sieve. Based on the influence of temperature and humidity on a molecular sieve material in an extrusion process, the problems of easiness in drying and cracking of a module, deformation of appearance, uneven wall thickness and the like in a preparation process exist. The invention mixes the molecular sieve, the adhesive, the foaming agent and the like for the first time, and obtains the honeycomb molecular sieve purification module with light weight, large specific surface and developed pore structure by optimizing the extrusion conditions and adopting the processes of low-pressure extrusion, low-temperature drying and high-temperature program calcination.
As an embodiment, the stirring time in the sample preliminary mixing step is 20 minutes, and the temperature is controlled to be 30 ℃.
As an embodiment, the sample is stirred and kneaded in the pugging step
The temperature is controlled to be 35 ℃, and the stirring speed is 50 r/min.
As an embodiment, in the extrusion molding step, the temperature is controlled to be 30 ℃ during extrusion, the extrusion rate is controlled to be 20mm/s, and the extrusion pressure is controlled to be
In one embodiment, the low-temperature drying step is performed at a temperature of 30 + -5 deg.C and a humidity of 30 + -5 deg.C
The wind speed is lower than 2m/s, and the light is avoided; controlling the water loss rate of the wet blank to be 0.5%/d, ventilating once every 4 hours
In one embodiment, in the calcination step, the temperature is raised from room temperature to 550 ℃ at a rate of 3 ℃/min, and the temperature is kept at 550 ℃ for 6 h.
As an embodiment, the clay is 1250 mesh calcined kaolin.
In one embodiment, the foaming agent is one or more of sodium carboxymethylcellulose and soybean meal.
As an implementation mode, the surfactant comprises water, glycerol, polyethylene glycol and a silica sol solution, and the surfactant comprises the following components in percentage by mass: 70-80% of water, 10-15% of silica sol and 5-10% of glycerin and polyethylene glycol. Water, glycerol, polyethylene glycol are surface active.
Firstly, mixing a plurality of binders, a molecular sieve and a foaming agent for pugging; and secondly, low-pressure extrusion molding is adopted, the mixture is placed for aging and then is dried at low temperature to remove excessive moisture, and finally, the mixture is calcined at high temperature through a program to obtain the lightweight honeycomb molecular sieve purification module with a strong framework structure, high mechanical strength, developed pore structure and large specific surface area.
Example 1:
(1) a sample initial mixing step: 40kg of molecular sieve raw material, 5.0kg of 1250-mesh calcined kaolin powder, 0.5kg of sodium carboxymethyl cellulose and 1.0kg of foaming agent are put into a mixer to be stirred and mixed uniformly for 20 minutes, and the temperature is controlled at 30 ℃.
(2) A sample pugging step: 30.0kg of water and 0.6kg of glycerin and polyethylene glycol, 0.2kg of a silica sol solution were added to the above (1) at a rate of 5 kg/min, and the mixture was further kneaded with stirring
Controlling the temperature at 35 ℃, stirringThe stirring speed is 50 r/min. The uniformly stirred mud-shaped blank is put into a mud mixer for repeated mixing and extrusion, and the temperature of the mud is controlled
Coarse smelting is repeated for 5 times, and vacuum degree is
(3) An extrusion molding step: and (3) putting the smelted pug into a low-pressure vacuum extruder for molding extrusion, wherein the extrusion temperature is controlled to be 30 ℃, the extrusion speed is 20mm/s, and the extrusion pressure is 30 MPa. (extrusion die external dimension: 100mm gamma 100mm square specification, pore structure hexagonal, aperture 3mm, wall thickness 1mm, green body cutting length 150 mm.)
(4) And (3) low-temperature drying: controlling the temperature to 30 +/-5 ℃ and maintaining the humidity
The wind speed is lower than 2m/s, the green body is protected from light, and the water loss rate of the wet green body is controlled to be 0.5%/d. Ventilating at intervals of 4 hours each time
The water content of the sample is reduced to 18%, and the sample is wetted to obtain a blank.
(5) And (3) low-temperature foaming step: and (3) foaming the wet blank at a low temperature of 80-90 ℃ for 24h, and naturally cooling to room temperature to obtain a naturally air-dried foam.
(6) And (3) calcining: and (3) calcining the blank in the step (5), heating the blank at a heating rate of 3 ℃/min, and carrying out programmed calcination at room temperature to 550 ℃, so that the foaming body is broken in the heating process to form more pore structures, keeping the temperature of 550 ℃ for 6h, and naturally cooling to room temperature to obtain the lightweight honeycomb molecular sieve purification module. The mechanical strength of the material is 1.77MPa, a sample is taken and 300mg is taken, the degassing temperature is 200 ℃, the degassing time is 300min, the ambient temperature is 20 ℃, and the specific surface area is tested to be 1322.1740m2The test is shown in figure 2 and tables 1, 2 and 3, wherein the compression strength (internal self-test) of the material is shown in table 1, and the specific surface test node of the BET multipoint method is shown in table 2Table 3 shows the results of the BJH pore size volume analysis.
TABLE 1
TABLE 2
TABLE 3
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
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| CN115504481A (en) * | 2022-11-23 | 2022-12-23 | 山东齐鲁华信高科有限公司 | Preparation method of honeycomb FAU type zeolite molecular sieve |
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