Preparation method of multi-element solid waste sheet layer stacking spherical molecular sieve, and corresponding material and application

Abstract

This invention relates to the field of CO2 adsorption materials technology, specifically to a method for preparing a multi-element solid waste layered stacked spherical molecular sieve, along with corresponding materials and applications. The method includes: ball milling coal gangue to obtain coal gangue powder; performing decarbonization and activation treatment on the coal gangue powder to obtain carbon-free coal gangue powder; mixing the carbon-free coal gangue powder with sodium hydroxide powder according to a specified ratio to obtain a first mixed powder; performing alkali fusion activation treatment on the first mixed powder to obtain activated carbon-free coal gangue powder; mixing the activated carbon-free coal gangue powder with aluminum ash powder according to a specified ratio to obtain a second mixed powder; aging the second mixed powder with deionized water according to a specified ratio to obtain aged material; crystallizing the aged material to obtain crystallized material; and washing and drying to obtain a layered stacked spherical molecular sieve. This invention can prepare molecular sieve materials that adsorb CO2 under ambient temperature and pressure conditions, significantly improving CO2 adsorption capacity. The method is simple to operate, has good repeatability, and is low in cost.

Description

Technical Field

[0001] This invention relates to the field of CO2 adsorption materials technology, and in particular to a method for preparing a multi-component solid waste layer stacked spherical molecular sieve, as well as the corresponding materials and applications. Background Technology

[0002] Coal gangue and aluminum ash are representative solid wastes. Coal gangue is a solid waste generated during coal mining; large quantities of untreated coal gangue piled on the ground not only occupy land but also pollute the land and water sources. Aluminum ash is a solid waste generated during aluminum smelting, containing large amounts of harmful substances such as alumina and aluminum fluoride. Random dumping or discharge into the environment will also lead to soil and water pollution. Therefore, how to rationally utilize these solid wastes, reduce their accumulation, and simultaneously treat pollution with waste is one of the key research issues. Currently, coal gangue is mainly used in building materials and agriculture, accounting for the majority of its consumption. For example, in 2022, only 3% was used for high-value utilization. How to improve the utilization value of coal gangue is a problem that current research needs to solve. Currently, the resource utilization of primary aluminum ash mainly focuses on recovering metallic aluminum, with relatively few utilization methods, while the utilization of secondary aluminum ash has more diverse methods. However, apart from extracting and recovering metallic aluminum, other methods for utilizing secondary aluminum ash are not very mature and are quite complex. Most are still in the laboratory research and development stage and are difficult to apply to industrial production. Therefore, further research is needed on the resource utilization of aluminum ash.

[0003] With the acceleration of industrialization and the increase in energy consumption, large amounts of CO2 are released into the atmosphere, leading to an increase in greenhouse gas concentrations and causing serious problems such as extreme weather events and sea-level rise. Therefore, developing efficient CO2 adsorption technologies is of great significance for mitigating climate change and achieving carbon neutrality. Current research includes the preparation of molecular sieves from coal gangue for CO2 adsorption. Laboratory studies on CO2 adsorption often involve controlling temperature and pressure, conducting the process at high temperatures or high pressures, which increases energy consumption and costs. The maximum adsorption capacity of the prepared coal gangue-based molecular sieves at room temperature and pressure typically does not exceed 2.5 mmol / g. Current research mainly focuses on surface modification of coal gangue-based molecular sieves to improve their CO2 adsorption performance, but this process is complex and costly.

[0004] Therefore, how to provide a method for preparing CO2 adsorption materials based on multi-element solid waste, while reducing preparation costs and operational complexity, and preparing adsorption materials with excellent CO2 adsorption capacity, has become an urgent technical problem to be solved. Summary of the Invention

[0005] In view of this, in order to overcome the shortcomings of the prior art, the present invention provides a method for preparing spherical molecular sieves based on multi-component solid waste layer stacking, as well as corresponding materials and applications.

[0006] According to one aspect of the present invention, a method for preparing spherical molecular sieves based on multi-component solid waste sheet stacking is provided, the method comprising:

[0007] Step 1: Preparation of carbon-free coal gangue powder

[0008] Coal gangue is ball-milled to obtain coal gangue powder, and the coal gangue powder is subjected to decarbonization and activation treatment to obtain carbon-free coal gangue powder.

[0009] Step 2: Preparation of activated carbon-free coal gangue powder

[0010] Carbon-free coal gangue powder and sodium hydroxide powder are mixed according to the formula to obtain a first mixed powder. The first mixed powder is then subjected to alkali fusion activation treatment to obtain activated carbon-free coal gangue powder.

[0011] Step 3: Preparation of Stacked Spherical Molecular Sieves

[0012] The activated carbon-free coal gangue powder and aluminum ash powder are mixed according to the formula to obtain a second mixed powder. The second mixed powder is then aged with deionized water according to the formula to obtain aged material.

[0013] The aged material is subjected to crystallization treatment to obtain crystallized material, which is then washed and dried to obtain a layered stacked spherical molecular sieve.

[0014] Preferably, the present invention is based on a method for preparing multi-component solid waste layer stacked spherical molecular sieves. In step one, coal gangue is ball-milled to obtain coal gangue powder, including: crushing the coal gangue into coal gangue powder with a particle size of no more than 75 μm.

[0015] Preferably, the present invention is based on the preparation method of multi-component solid waste layer stacked spherical molecular sieve. In step one, the coal gangue powder is subjected to decarbonization and activation treatment, including: heating the coal gangue powder to 900°C at a heating rate of 10°C / min, holding it at that temperature for 3 hours and then cooling it to room temperature.

[0016] Preferably, in the present invention, based on the method for preparing multi-component solid waste layer-stacked spherical molecular sieves, in step two, the mass ratio of carbon-free coal gangue powder to sodium hydroxide powder is 1:2, and the particle size of sodium hydroxide powder is not greater than 75μm.

[0017] Preferably, the present invention is based on the preparation method of multi-component solid waste layer stacked spherical molecular sieve. In step two, the first mixed powder is subjected to alkali fusion activation treatment, including: heating the first mixed powder to 500°C at a heating rate of 10°C / min, holding it at that temperature for 3 hours and then cooling it to room temperature.

[0018] Preferably, in the present invention, based on the method for preparing multi-component solid waste layer stacked spherical molecular sieves, in step three, the mass ratio of activated carbon-free coal gangue powder to aluminum ash powder is 1:0.25-1, and the particle size of aluminum ash powder is not greater than 75μm.

[0019] Preferably, the present invention is based on the preparation method of multi-component solid waste layer stacked spherical molecular sieve. In step three, the second mixed powder is aged with deionized water according to the ratio, including: adding the second mixed powder to deionized water according to the ratio, and aging under magnetic stirring for 4 hours under a water bath heating condition of 30°C, wherein the mass ratio of the second mixed powder to deionized water is 1:4.72-5.43.

[0020] Preferably, the present invention is based on a method for preparing multi-component solid waste layer-stacked spherical molecular sieves. In step three, the aged material is subjected to crystallization treatment to obtain crystallized material. After washing and drying, the layer-stacked spherical molecular sieve is obtained. This includes: placing the aged material in a high-pressure reactor and allowing it to stand and crystallize at 110°C for 4-5 hours; filtering the crystallized product to obtain solid material; washing the solid material with deionized water; and drying it at a constant temperature of 60°C for 6 hours.

[0021] According to another aspect of the present invention, a multi-component solid waste layer-stacked spherical molecular sieve is provided, which is prepared according to the method described above.

[0022] According to another aspect of the present invention, the present invention relates to the application of multi-component solid waste sheet stacked spherical molecular sieves as CO2 adsorption materials.

[0023] The present invention provides a method for preparing multi-component solid waste layer-stacked spherical molecular sieves, along with corresponding materials and applications, which have the following beneficial effects:

[0024] 1. A multi-component solid waste layered stacked spherical molecular sieve was prepared by alkali fusion activation of carbon-free coal gangue powder and aluminum ash. All raw materials are solid waste. Activated carbon-free coal gangue powder was obtained through decarbonization activation and alkali fusion activation treatment, which reduced the preparation cost and improved the utilization rate of silicon and aluminum components in coal gangue.

[0025] 2. By controlling the mass ratio of activated carbon-free coal gangue powder to aluminum ash powder, and by regulating the morphology of molecular sieves through aging and crystallization treatments, molecular sieves with stacked spherical shapes, regular morphology, and uniform size were synthesized. The stacked morphology increased the specific surface area of ​​the molecular sieves and significantly improved their CO2 adsorption capacity.

[0026] 3. The multi-component solid waste layer stacked spherical molecular sieve prepared by this invention can achieve CO2 adsorption under normal temperature and pressure conditions, avoiding the energy consumption and cost increase caused by high temperature and high pressure operation. The CO2 adsorption under normal temperature and pressure conditions significantly improves the applicability and flexibility of the material adsorption, and has broad prospects for industrial application.

[0027] 4. The present invention is based on a method for preparing multi-component solid waste layer stacked spherical molecular sieves. It is simple to operate, has good repeatability, and low cost, and is suitable for industrial application. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 The image shows the SEM morphology of the stacked spherical molecular sieve prepared in Example 1 of this invention at 4000x magnification.

[0030] Figure 2 The image shows the SEM morphology of the stacked spherical molecular sieve prepared in Example 1 of this invention at 20,000x magnification.

[0031] Figure 3 The image shows the morphology of the stacked spherical molecular sieve prepared in Example 3 of this invention at 4000x SEM magnification.

[0032] Figure 4 The image shows the SEM morphology of the stacked spherical molecular sieve prepared in Example 3 of this invention at 20,000x magnification.

[0033] Figure 5 The image shows the SEM morphology of the stacked spherical molecular sieve prepared in Example 4 of this invention at 4000x magnification.

[0034] Figure 6 The image shows the SEM morphology of the stacked spherical molecular sieve prepared in Example 4 of this invention at 20,000x magnification.

[0035] Figure 7 The image shows the TEM morphology of the stacked spherical molecular sieve prepared in Example 4 of this invention at 20,000x magnification.

[0036] Figure 8 The image shows the TEM morphology of the stacked spherical molecular sieve prepared in Example 4 of this invention at 50,000x magnification.

[0037] Figure 9 The crystal structure test results are for the layered stacked spherical molecular sieve prepared in Example 1 of this invention.

[0038] Figure 10 The crystal structure test results are for the layered stacked spherical molecular sieve prepared in Example 2 of this invention.

[0039] Figure 11 The crystal structure test results are for the layered stacked spherical molecular sieve prepared in Example 3 of this invention.

[0040] Figure 12The crystal structure test results are for the layered stacked spherical molecular sieve prepared in Example 4 of this invention. Detailed Implementation

[0041] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0042] It should be noted that, in the absence of conflict, the following embodiments and features can be combined with each other; and, based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0043] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this disclosure, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0044] Example 1

[0045] Preparation of multi-component solid waste layered stacked spherical molecular sieves:

[0046] Step 1: Preparation of carbon-free coal gangue powder

[0047] The coal gangue was ball-milled and pulverized to a powder size of no more than 75 μm. The coal gangue powder was then heated to 900°C at a heating rate of 10°C / min, held at that temperature for 3 hours, and then cooled to room temperature to obtain carbon-free coal gangue powder.

[0048] Step 2: Preparation of activated carbon-free coal gangue powder

[0049] Carbon-free coal gangue powder and sodium hydroxide powder with a particle size of no more than 75 μm are mixed at a mass ratio of 1:2 to obtain a first mixed powder. The first mixed powder is then subjected to alkali fusion activation treatment. The first mixed powder is heated to 500℃ at a heating rate of 10℃ / min, held at that temperature for 3 hours, and then cooled to room temperature to obtain activated carbon-free coal gangue powder.

[0050] Step 3: Preparation of Stacked Spherical Molecular Sieves

[0051] Activated carbon-free coal gangue powder and aluminum ash powder with a particle size of no more than 75μm were mixed at a mass ratio of 1:0.25 to obtain a second mixed powder. The second mixed powder was added to deionized water at a mass ratio of 1:5.43 and aged under magnetic stirring for 4 hours under a water bath heating condition of 30℃ to obtain aged material.

[0052] The aged material was placed in a high-pressure reactor and allowed to crystallize at 110°C for 5 hours. The crystallized product was filtered to obtain solid material. The solid material was washed with deionized water and dried at 60°C for 6 hours to obtain a layered stacked spherical molecular sieve.

[0053] Example 2

[0054] Preparation of multi-component solid waste layered stacked spherical molecular sieves:

[0055] Step 1: Preparation of carbon-free coal gangue powder

[0056] The coal gangue was ball-milled and pulverized to a powder size of no more than 75 μm. The coal gangue powder was then heated to 900°C at a heating rate of 10°C / min, held at that temperature for 3 hours, and then cooled to room temperature to obtain carbon-free coal gangue powder.

[0057] Step 2: Preparation of activated carbon-free coal gangue powder

[0058] Carbon-free coal gangue powder and sodium hydroxide powder with a particle size of no more than 75 μm are mixed at a mass ratio of 1:2 to obtain a first mixed powder. The first mixed powder is then subjected to alkali fusion activation treatment. The first mixed powder is heated to 500℃ at a heating rate of 10℃ / min, held at that temperature for 3 hours, and then cooled to room temperature to obtain activated carbon-free coal gangue powder.

[0059] Step 3: Preparation of Stacked Spherical Molecular Sieves

[0060] Activated carbon-free coal gangue powder and aluminum ash powder with a particle size of no more than 75μm were mixed at a mass ratio of 1:0.5 to obtain a second mixed powder. The second mixed powder was added to deionized water at a mass ratio of 1:5.03 and aged under magnetic stirring for 4 hours under a water bath heating condition of 30℃ to obtain aged material.

[0061] The aged material was placed in a high-pressure reactor and allowed to crystallize at 110°C for 4.5 hours. The crystallized product was filtered to obtain solid material. The solid material was washed with deionized water and then dried at a constant temperature of 60°C for 6 hours to obtain a layered stacked spherical molecular sieve.

[0062] Example 3

[0063] Preparation of multi-component solid waste layered stacked spherical molecular sieves:

[0064] Step 1: Preparation of carbon-free coal gangue powder

[0065] The coal gangue was ball-milled and pulverized to a powder size of no more than 75 μm. The coal gangue powder was then heated to 900°C at a heating rate of 10°C / min, held at that temperature for 3 hours, and then cooled to room temperature to obtain carbon-free coal gangue powder.

[0066] Step 2: Preparation of activated carbon-free coal gangue powder

[0067] Carbon-free coal gangue powder and sodium hydroxide powder with a particle size of no more than 75 μm are mixed at a mass ratio of 1:2 to obtain a first mixed powder. The first mixed powder is then subjected to alkali fusion activation treatment. The first mixed powder is heated to 500℃ at a heating rate of 10℃ / min, held at that temperature for 3 hours, and then cooled to room temperature to obtain activated carbon-free coal gangue powder.

[0068] Step 3: Preparation of Stacked Spherical Molecular Sieves

[0069] Activated carbon-free coal gangue powder and aluminum ash powder with a particle size of no more than 75μm were mixed at a mass ratio of 1:1 to obtain a second mixed powder. The second mixed powder was added to deionized water at a mass ratio of 1:4.72 and aged under magnetic stirring for 4 hours under a water bath heating condition of 30℃ to obtain aged material.

[0070] The aged material was placed in a high-pressure reactor and allowed to crystallize at 110°C for 4 hours. The crystallized product was filtered to obtain solid material. The solid material was washed with deionized water and dried at a constant temperature of 60°C for 6 hours to obtain a layered stacked spherical molecular sieve.

[0071] Example 4

[0072] Preparation of multi-component solid waste layered stacked spherical molecular sieves:

[0073] Step 1: Preparation of carbon-free coal gangue powder

[0074] The coal gangue was ball-milled and pulverized to a powder size of no more than 75 μm. The coal gangue powder was then heated to 900°C at a heating rate of 10°C / min, held at that temperature for 3 hours, and then cooled to room temperature to obtain carbon-free coal gangue powder.

[0075] Step 2: Preparation of activated carbon-free coal gangue powder

[0076] Carbon-free coal gangue powder and sodium hydroxide powder with a particle size of no more than 75 μm are mixed at a mass ratio of 1:2 to obtain a first mixed powder. The first mixed powder is then subjected to alkali fusion activation treatment. The first mixed powder is heated to 500℃ at a heating rate of 10℃ / min, held at that temperature for 3 hours, and then cooled to room temperature to obtain activated carbon-free coal gangue powder.

[0077] Step 3: Preparation of Stacked Spherical Molecular Sieves

[0078] Activated carbon-free coal gangue powder and aluminum ash powder with a particle size of no more than 75μm were mixed at a mass ratio of 1:0.5 to obtain a second mixed powder. The second mixed powder was added to deionized water at a mass ratio of 1:5.03 and aged under magnetic stirring for 4 hours under a water bath heating condition of 30℃ to obtain aged material.

[0079] The aged material was placed in a high-pressure reactor and allowed to crystallize at 110°C for 5 hours. The crystallized product was filtered to obtain solid material. The solid material was washed with deionized water and dried at 60°C for 6 hours to obtain a layered stacked spherical molecular sieve.

[0080] Example 5

[0081] The microstructure of the stacked spherical molecular sieves prepared in Examples 1, 3, and 4 was observed and characterized at different magnifications using a Hitachi Regulus 8100 scanning electron microscope. The morphology of the stacked spherical molecular sieve prepared in Example 1 at 4000x SEM is shown in [reference needed]. Figure 1 The morphology of the layered stacked spherical molecular sieve prepared in Example 1 under 20,000x SEM magnification is shown in [reference needed]. Figure 2 The morphology of the stacked spherical molecular sieve prepared in Example 3 on a 4000x SEM is shown in [reference needed]. Figure 3 The morphology of the layered stacked spherical molecular sieve prepared in Example 3 on a 20,000x SEM is shown below. Figure 4 The morphology of the layered stacked spherical molecular sieve prepared in Example 4 is shown in the SEM image at 4000x magnification. Figure 5 The morphology of the layered stacked spherical molecular sieve prepared in Example 4, magnified at 20,000x SEM, is shown below. Figure 6 Among them, such as Figure 1 As shown, the molecular sieve prepared in Example 1 exhibited a layered, stacked spherical morphology. However, with the increase of aluminum ash addition and crystallization time, as... Figure 3 , Figure 5 As shown, the proportion of layered stacked spherical molecular sieves gradually increases in the molecular sieves prepared in Examples 3 and 4. Simultaneously, with the increase of aluminum ash addition and crystallization time, as... Figure 2 , Figure 4 , Figure 6 As shown, the resulting molecular sieves have more uniform morphology and size, and the regularity of morphology gradually improves.

[0082] The microstructure of the layered stacked spherical molecular sieve prepared in Example 4 was observed and characterized using a transmission electron microscope (FEI Talos F200X G2). The morphology of the layered stacked spherical molecular sieve prepared in Example 4 at 20,000x TEM magnification is shown in the image below. Figure 7 The morphology of the layered stacked spherical molecular sieve prepared in Example 4 at 50,000x TEM magnification is shown in [reference needed]. Figure 8 .like Figure 7 , Figure 8 As shown, the molecular sieve prepared in Example 4 can be seen to be composed of nanosheets stacked into spheres, and the stacking of the sheets provides the molecular sieve with a larger specific surface area.

[0083] The crystal structures of the layered stacked spherical molecular sieves prepared in Examples 1, 2, 3, and 4 were tested using an X-ray diffractometer (Shimadzu XRD-6000). The crystal structure test results of the layered stacked spherical molecular sieves prepared in Examples 1 to 4 are respectively referred to [reference needed]. Figure 9 , Figure 10 , Figure 11 and Figure 12 .like Figure 9 As shown, the characteristic peaks of type A molecular sieves have appeared in the layered stacked spherical molecular sieve prepared in Example 1. Figure 10 , Figure 11 , Figure 12 As shown, the layered stacked spherical molecular sieves prepared in Examples 2-4 all belong to type A molecular sieves. With the increase of aluminum ash addition and crystallization time, the intensity of the characteristic peaks of type A molecular sieves gradually increases, indicating that the crystallinity gradually improves. This is consistent with... Figure 2 , Figure 4 , Figure 6 The morphological regularity of the stacked spherical molecular sieves in the middle layer is correspondingly improved.

[0084] The CO2 adsorption capacity of the layered stacked spherical molecular sieves prepared in Examples 1, 2, 3, and 4 was tested at 101.325 kPa and 298.15 K using a fully automated specific surface area and porosity analyzer (Quantachrome Autosorb IQ). The adsorption capacity of the layered stacked spherical molecular sieve prepared in Example 1 was 2.61 mmol / g. The adsorption capacity of the layered stacked spherical molecular sieve prepared in Example 2 was 2.72 mmol / g. The adsorption capacity of the layered stacked spherical molecular sieve prepared in Example 3 was 2.86 mmol / g. The adsorption capacity of the layered stacked spherical molecular sieve prepared in Example 4 was 2.91 mmol / g. The CO2 adsorption capacity of the layered stacked spherical molecular sieves prepared in Examples 1-4 was greater than 2.5 mmol / g at room temperature and pressure, indicating good adsorption performance. Furthermore, the adsorption capacity of the layered stacked spherical molecular sieves prepared in Examples 1-4 gradually increased with the increase of aluminum ash addition and crystallization time. This can be attributed to the following... Figure 2 , Figure 4 , Figure 6 and Figure 9-12 The molecular sieves shown in the figure exhibit improved morphological regularity and crystallinity.

[0085] The present invention provides a method for preparing multi-component solid waste layer-stacked spherical molecular sieves, along with corresponding materials and applications, which have the following beneficial effects:

[0086] 1. A multi-component solid waste layered stacked spherical molecular sieve was prepared by alkali fusion activation of carbon-free coal gangue powder and aluminum ash. All raw materials are solid waste. Activated carbon-free coal gangue powder was obtained through decarbonization activation and alkali fusion activation treatment, which reduced the preparation cost and improved the utilization rate of silicon and aluminum components in coal gangue.

[0087] 2. By controlling the mass ratio of activated carbon-free coal gangue powder to aluminum ash powder, and by regulating the morphology of molecular sieves through aging and crystallization treatments, molecular sieves with stacked spherical shapes, regular morphology, and uniform size were synthesized. The stacked morphology increased the specific surface area of ​​the molecular sieves and significantly improved their CO2 adsorption capacity.

[0088] 3. The multi-component solid waste layer stacked spherical molecular sieve prepared by this invention can achieve CO2 adsorption under normal temperature and pressure conditions, avoiding the energy consumption and cost increase caused by high temperature and high pressure operation. The CO2 adsorption under normal temperature and pressure conditions significantly improves the applicability and flexibility of the material adsorption, and has broad prospects for industrial application.

[0089] 4. The present invention is based on a method for preparing multi-component solid waste layer stacked spherical molecular sieves. It is simple to operate, has good repeatability, and low cost, and is suitable for industrial application.

[0090] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for preparing spherical molecular sieves based on multi-component solid waste layer stacking, characterized in that, The method includes: Step 1: Preparation of carbon-free coal gangue powder Coal gangue was ball-milled to obtain coal gangue powder. The coal gangue powder was then subjected to decarbonization and activation treatment by heating it to 900℃ at a heating rate of 10℃ / min, holding it at that temperature for 3 hours, and then cooling it to room temperature to obtain carbon-free coal gangue powder. Step 2: Preparation of activated carbon-free coal gangue powder Carbon-free coal gangue powder and sodium hydroxide powder are mixed at a mass ratio of 1:2 to obtain a first mixed powder. The first mixed powder is then subjected to alkali fusion activation treatment. The first mixed powder is heated to 500°C at a heating rate of 10°C / min, held at that temperature for 3 hours, and then cooled to room temperature to obtain activated carbon-free coal gangue powder. Step 3: Preparation of Stacked Spherical Molecular Sieves Activated carbon-free coal gangue powder and aluminum ash powder were mixed at a mass ratio of 1:0.5-1 to obtain a second mixed powder. The second mixed powder was then aged with deionized water according to the formula. The second mixed powder was added to the deionized water at a mass ratio of 1:4.72-5.43 and aged under magnetic stirring for 4 hours in a 30°C water bath to obtain aged material. The aged material is subjected to crystallization treatment to obtain crystallized material, which is then washed and dried to obtain a layered stacked spherical molecular sieve.

2. The method for preparing spherical molecular sieves based on multi-component solid waste layer stacking according to claim 1, characterized in that, In step one, the coal gangue is ball-milled to obtain coal gangue powder, including: crushing the coal gangue into coal gangue powder with a particle size of no more than 75 μm.

3. The method for preparing spherical molecular sieves based on multi-component solid waste layer stacking according to claim 1, characterized in that, In step two, the particle size of the sodium hydroxide powder is no greater than 75 μm.

4. The method for preparing spherical molecular sieves based on multi-component solid waste layer stacking according to claim 1, characterized in that, In step three, the particle size of the aluminum ash powder is no greater than 75 μm.

5. The method for preparing spherical molecular sieves based on multi-component solid waste layer stacking according to claim 1, characterized in that, In step three, the aged material is crystallized to obtain crystallized material. After washing and drying, a layered stacked spherical molecular sieve is obtained. This includes: placing the aged material in a high-pressure reactor and allowing it to stand at 110°C for 4-5 hours to crystallize; filtering the crystallized product to obtain solid material; washing the solid material with deionized water; and drying it at a constant temperature of 60°C for 6 hours.

6. A spherical molecular sieve based on multi-component solid waste layer stacking, characterized in that, The spherical molecular sieve based on multi-component solid waste layer stacking is prepared according to any one of claims 1-5.

7. The application of the multi-component solid waste layered stacked spherical molecular sieve as a CO2 adsorption material according to claim 6.

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