Large-pore-volume activated carbon for carbon tank and preparation method of large-pore-volume activated carbon

Abstract

The invention discloses large-pore-volume activated carbon for a carbon tank and a preparation method thereof.The large-pore-volume activated carbon comprises activated carbon, the activated carbon comprises a component A, a component B and a component C. The component A is prepared from, by weight, 10-30 parts of sawdust, 20-30 parts of walnut shells, 20-30 parts of coconut shells, 10-30 parts of bagasse and 10-30 parts of furfural residues; the component B is prepared from the following components in parts by weight: 15-40 parts of lignite and 15-40 parts of peat, and the component C is prepared from 10-25 parts of furan resin. The activated carbon disclosed by the invention is high in overall adsorption capacity, has the characteristics of high specific surface area and adjustable pore size distribution, presents a layered structure which is gradually increased layer by layer on the activated carbon structure, and has the advantages of high adsorption capacity, high specific surface area and adjustable pore size distribution. The catalyst has a good application prospect in the fields of VOCs, catalysis and the like.

Description

Technical Field

[0001] The invention relates to the technical field of activated carbon, in particular to a large-pore activated carbon for a carbon canister and a preparation method thereof. Background Art

[0002] The main function of the activated carbon in the large-pore carbon canister is to adsorb and store gasoline vapor, and send it into the engine for combustion at an appropriate time, thereby reducing gasoline evaporation emissions, improving fuel efficiency, and reducing environmental pollution. Specifically, the activated carbon in the activated carbon canister has the following functions: The activated carbon canister is used as a fuel vapor adsorption and desorption device for gasoline vehicles. It is installed between the gasoline tank and the engine. It can adsorb gasoline vapor in the fuel tank and reduce gasoline evaporation emissions in the car's fuel tank and carburetor. When the engine is in working condition, the solenoid valve is opened through the ECU to send the gasoline vapor adsorbed in the activated carbon to the back of the throttle and enter the engine for combustion. When the engine is turned off or the solenoid valve is closed, the vapor escaping from the fuel tank will be adsorbed by the activated carbon and stored in the carbon canister: when the engine is restarted, the solenoid valve opens, and the gasoline vapor in the activated carbon canister is sucked into the intake manifold to participate in combustion, completing the recovery and reuse of the fuel vapor. In addition, the activated carbon has a well-developed pore structure, a large specific surface area, and a strong adsorption capacity. It can efficiently adsorb various volatile harmful substances, such as formaldehyde, organic solvents, etc. These characteristics make activated carbon widely used in air purification, water treatment, organic solvent recovery and other fields.

[0003] However, traditional activated carbon has the following disadvantages:

[0004] Traditional activated carbon is put into the carbon canister. Because the adsorption capacity of activated carbon is relatively small, it is easy to saturate. Once saturated, the activated carbon loses its adsorption capacity. With the continuous upgrading of national environmental protection regulations, the fuel emission control of carbon canisters has become more and more stringent, and the limit leakage value of carbon canisters has become lower and lower. The old generation of automotive activated carbon is difficult to meet the use requirements of national environmental protection regulations. Summary of the invention

[0005] The purpose of the present invention is to provide a large-pore volume activated carbon for carbon canisters and a preparation method thereof, so as to solve the problem proposed in the above background technology that the traditional activated carbon is placed in the carbon canister. Since the adsorption capacity of the activated carbon is relatively small, it is easy to be saturated. Once saturated, the activated carbon loses its adsorption capacity. With the continuous upgrading of national environmental protection laws and regulations, the fuel emission control of carbon canisters is becoming more and more stringent, and the limit leakage value of carbon canisters is getting lower and lower. The old generation of automotive activated carbon is difficult to meet the use requirements required by national environmental protection laws and regulations.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a macroporous activated carbon for a carbon canister, comprising activated carbon, wherein the activated carbon comprises component A, component B and component C, wherein component A comprises the following components: by weight, 10-30 parts of sawdust, 20-30 parts of walnut shells, 20-30 parts of coconut shells, 10-30 parts of bagasse and 10-30 parts of furfural residues, wherein component B comprises the following components: by weight, 15-40 parts of lignite and 15-40 parts of peat, wherein component C comprises the following components: by weight, 10-25 parts of furan resin, 10-25 parts of phenolic resin, 20-30 parts of urea-formaldehyde resin, 20-30 parts of polycarbonate, 5-10 parts of styrene-divinylbenzene copolymer and 5-10 parts of polyvinylidene chloride.

[0007] As a preferred technical solution of the present invention, the component A comprises the following components: by weight, 30 parts of sawdust, 30 parts of walnut shells, 20 parts of coconut shells, 10 parts of bagasse and 10 parts of furfural residues; the component B comprises the following components: by weight, 30 parts of lignite and 20 parts of peat; the component C comprises the following components: by weight, 25 parts of furan resin, 25 parts of phenolic resin, 20 parts of urea-formaldehyde resin, 20 parts of polycarbonate, 5 parts of styrene-divinylbenzene copolymer and 5 parts of polyvinylidene chloride.

[0008] As a preferred technical solution of the present invention, the component A comprises the following components: 25 parts of sawdust, 20 parts of walnut shells, 20 parts of coconut shells, 25 parts of bagasse and 10 parts of furfural residues, the component B comprises the following components: 25 parts of lignite and 25 parts of peat, and the component C comprises the following components: 20 parts of furan resin, 25 parts of phenolic resin, 25 parts of urea-formaldehyde resin, 20 parts of polycarbonate, 5 parts of styrene-divinylbenzene copolymer and 5 parts of polyvinylidene chloride, by weight.

[0009] As a preferred technical solution of the present invention, the component A comprises the following components: 30 parts of sawdust, 20 parts of walnut shells, 20 parts of coconut shells, 15 parts of bagasse and 15 parts of furfural residues, by weight; the component B comprises the following components: 20 parts of lignite and 130 parts of peat, by weight; and the component C comprises the following components: 25 parts of furan resin, 20 parts of phenolic resin, 25 parts of urea-formaldehyde resin, 20 parts of polycarbonate, 5 parts of styrene-divinylbenzene copolymer and 5 parts of polyvinylidene chloride, by weight.

[0010] As a preferred technical solution of the present invention, the component A comprises the following components: by weight, 10 parts of sawdust, 30 parts of walnut shells, 30 parts of coconut shells, 10 parts of bagasse and 20 parts of furfural residues; the component B comprises the following components: by weight, 23 parts of lignite and 40 parts of peat; the component C comprises the following components: by weight, 20 parts of furan resin, 20 parts of phenolic resin, 30 parts of urea-formaldehyde resin, 20 parts of polycarbonate, 5 parts of styrene-divinylbenzene copolymer and 5 parts of polyvinylidene chloride.

[0011] The present invention provides a method for preparing activated carbon for a carbon canister with a large pore volume, comprising the following steps:

[0012] Step 1, preparing component A: processing the raw materials for preparing A to obtain component A;

[0013] Step 2, preparing component B: processing the raw materials for preparing B to obtain component B;

[0014] Step 3, preparing component C: processing the raw materials for preparing C to obtain component C;

[0015] Step 4, preparing the finished product: After the shaping process, the components A, B, and C are combined according to the pore characteristic structure distribution, extruded and formed, and a carbon embryo with a layered three-dimensional distribution of pore structure is obtained after the combination, and then the activated carbon product is obtained after the activation process.

[0016] As a preferred technical solution of the present invention, the specific process of raw material processing in steps one to three is as follows: S1, pretreatment: particle size and ash content of the raw materials are processed; S2, carbonization: the raw materials after particle size and ash content processing are dried at a temperature of 170 to 600°C, and 80% of their organic tissues are carbonized.

[0017] As a preferred technical solution of the present invention, the specific processing flow in step 4 is S1, shaping treatment: after the prepared components A, B and C are mixed evenly with the activator and the composite binder, they are extruded into a stacked strip carbon embryo through a multi-layer co-extruder, and the core layer is respectively a mixture of component A, a mixture of component B and a mixture of component C. Then, the strip carbon embryo is cut to a fixed length; S2, activation treatment: the cut carbon embryo is sent to an activation furnace for activation, and finally the finished product is washed and dried to obtain an activated carbon product with a layered three-dimensional distribution of pore structure. The composite binder is a mixture of inorganic clay and organic starch.

[0018] Compared with the prior art, the beneficial effects of the present invention are: the activated carbon is formed by component A, component B and component C in increasing layers, the activated carbon has strong overall adsorption capacity, has the characteristics of high specific surface area and adjustable pore size distribution, and presents a layered structure that increases layer by layer on the activated carbon structure, and has good application prospects in the fields of VOCs, catalysis, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] Embodiment 1:

[0022] See also Figure 1 The present invention provides a macroporous activated carbon for a carbon canister, comprising activated carbon, wherein the activated carbon comprises component A, component B and component C, wherein component A comprises the following components: by weight, 10-30 parts of sawdust, 20-30 parts of walnut shells, 20-30 parts of coconut shells, 10-30 parts of bagasse and 10-30 parts of furfural residues, component B comprises the following components: by weight, 15-40 parts of lignite and 15-40 parts of peat, and component C comprises the following components: by weight, 10-25 parts of furan resin, 10-25 parts of phenolic resin, 20-30 parts of urea-formaldehyde resin, 20-30 parts of polycarbonate, 5-10 parts of styrene-divinylbenzene copolymer and 5-10 parts of polyvinylidene chloride.

[0023] The present invention provides a method for preparing activated carbon for a carbon canister with a large pore volume, comprising the following steps:

[0024] Step 1, preparing component A: processing the raw materials for preparing A to obtain component A;

[0025] Step 2, preparing component B: processing the raw materials for preparing B to obtain component B;

[0026] Step 3, preparing component C: processing the raw materials for preparing C to obtain component C;

[0027] Step 4, preparing the finished product: After the shaping process, the components A, B, and C are combined according to the pore characteristic structure distribution, extruded and formed, and a carbon embryo with a layered three-dimensional distribution of pore structure is obtained after the combination, and then the activated carbon product is obtained after the activation process.

[0028] As a preferred technical solution of the present invention, the specific process of raw material processing in steps one to three is as follows: S1, pretreatment: particle size and ash content of the raw materials are processed; S2, carbonization: the raw materials after particle size and ash content processing are dried at a temperature of 170 to 600°C, and 80% of their organic tissues are carbonized.

[0029] As a preferred technical solution of the present invention, the specific processing flow in step 4 is as follows: S1, shaping treatment: after the prepared components A, B and C are mixed evenly with the activator and the composite binder respectively, they are extruded into a stacked and nested strip carbon embryo through a multi-layer co-extrusion extruder, and the core layer is respectively a mixture of component A, a mixture of component B and a mixture of component C, and then the strip carbon embryo is cut to a fixed length; S2, activation treatment: the cut carbon embryo is sent to an activation furnace for activation, and finally the finished product is washed and dried to obtain an activated carbon product with a layered three-dimensional distribution of pore structure. The composite binder is a mixture of inorganic clay and organic starch.

[0030] Embodiment 2:

[0031] See also Figure 1 The present invention provides a macroporous activated carbon for a carbon canister, comprising activated carbon, wherein the activated carbon comprises component A, component B and component C, wherein component A comprises the following components: by weight, 30 parts of sawdust, 30 parts of walnut shells, 20 parts of coconut shells, 10 parts of bagasse and 10 parts of furfural residues, component B comprises the following components: by weight, 30 parts of lignite and 20 parts of peat, and component C comprises the following components: by weight, 25 parts of furan resin, 25 parts of phenolic resin, 20 parts of urea-formaldehyde resin, 20 parts of polycarbonate, 5 parts of styrene-divinylbenzene copolymer and 5 parts of polyvinylidene chloride.

[0032] The present invention provides a method for preparing activated carbon for a carbon canister with a large pore volume, comprising the following steps:

[0033] Step 1, preparing component A: processing the raw materials for preparing A to obtain component A;

[0034] Step 2, preparing component B: processing the raw materials for preparing B to obtain component B;

[0035] Step 3, preparing component C: processing the raw materials for preparing C to obtain component C;

[0036] Step 4, preparing the finished product: After the shaping process, the components A, B, and C are combined according to the pore characteristic structure distribution, extruded and formed, and a carbon embryo with a layered three-dimensional distribution of pore structure is obtained after the combination, and then the activated carbon product is obtained after the activation process.

[0037] As a preferred technical solution of the present invention, the specific process of raw material processing in steps one to three is as follows: S1, pretreatment: particle size and ash content of the raw materials are processed; S2, carbonization: the raw materials after particle size and ash content processing are dried at a temperature of 170 to 600°C, and 80% of their organic tissues are carbonized.

[0038] As a preferred technical solution of the present invention, the specific processing flow in step 4 is as follows: S1, shaping treatment: after the prepared components A, B and C are mixed evenly with the activator and the composite binder respectively, they are extruded into a stacked and nested strip carbon embryo through a multi-layer co-extrusion extruder, and the core layer is respectively a mixture of component A, a mixture of component B and a mixture of component C, and then the strip carbon embryo is cut to a fixed length; S2, activation treatment: the cut carbon embryo is sent to an activation furnace for activation, and finally the finished product is washed and dried to obtain an activated carbon product with a layered three-dimensional distribution of pore structure. The composite binder is a mixture of inorganic clay and organic starch.

[0039] Embodiment 3:

[0040] See also Figure 1 The present invention provides a macroporous activated carbon for a carbon canister, comprising activated carbon, wherein the activated carbon comprises component A, component B and component C, wherein component A comprises the following components: by weight, 25 parts of sawdust, 20 parts of walnut shells, 20 parts of coconut shells, 25 parts of bagasse and 10 parts of furfural residues, component B comprises the following components: by weight, 25 parts of lignite and 25 parts of peat, and component C comprises the following components: by weight, 20 parts of furan resin, 25 parts of phenolic resin, 25 parts of urea-formaldehyde resin, 20 parts of polycarbonate, 5 parts of styrene-divinylbenzene copolymer and 5 parts of polyvinylidene chloride.

[0041] The present invention provides a method for preparing activated carbon for a carbon canister with a large pore volume, comprising the following steps:

[0042] Step 1, preparing component A: processing the raw materials for preparing A to obtain component A;

[0043] Step 2, preparing component B: processing the raw materials for preparing B to obtain component B;

[0044] Step 3, preparing component C: processing the raw materials for preparing C to obtain component C;

[0045] Step 4, preparing the finished product: After the shaping process, the components A, B, and C are combined according to the pore characteristic structure distribution, extruded and formed, and a carbon embryo with a layered three-dimensional distribution of pore structure is obtained after the combination, and then the activated carbon product is obtained after the activation process.

[0046] As a preferred technical solution of the present invention, the specific process of raw material processing in steps one to three is as follows: S1, pretreatment: particle size and ash content of the raw materials are processed; S2, carbonization: the raw materials after particle size and ash content processing are dried at a temperature of 170 to 600°C, and 80% of their organic tissues are carbonized.

[0047] As a preferred technical solution of the present invention, the specific processing flow in step 4 is S1, shaping treatment: after the prepared component A, component B and component C are mixed evenly with the activator and the composite binder respectively, they are extruded into a stacked strip carbon embryo through a multi-layer co-extrusion extruder, and the core layer is respectively a mixture of component A, a mixture of component B and a mixture of component C, and then the strip carbon embryo is cut to a fixed length;

[0048] S2, activation treatment: the cut carbon embryo is sent to the activation furnace for activation, and finally the finished product is washed and dried to obtain an activated carbon product with a layered three-dimensional distribution of pore structure. The composite binder is a mixture of inorganic clay and organic starch.

[0049] Embodiment 4:

[0050] See also Figure 1 The present invention provides a macroporous activated carbon for a carbon canister, comprising activated carbon, wherein the activated carbon comprises component A, component B and component C, wherein component A comprises the following components: by weight, 30 parts of sawdust, 20 parts of walnut shells, 20 parts of coconut shells, 15 parts of bagasse and 15 parts of furfural residues, component B comprises the following components: by weight, 20 parts of lignite and 130 parts of peat, and component C comprises the following components: by weight, 25 parts of furan resin, 20 parts of phenolic resin, 25 parts of urea-formaldehyde resin, 20 parts of polycarbonate, 5 parts of styrene-divinylbenzene copolymer and 5 parts of polyvinylidene chloride.

[0051] The present invention provides a method for preparing activated carbon for a carbon canister with a large pore volume, comprising the following steps:

[0052] Step 1, preparing component A: processing the raw materials for preparing A to obtain component A;

[0053] Step 2, preparing component B: processing the raw materials for preparing B to obtain component B;

[0054] Step 3, preparing component C: processing the raw materials for preparing C to obtain component C;

[0055] Step 4, preparing the finished product: After the shaping process, the components A, B, and C are combined according to the pore characteristic structure distribution, extruded and formed, and a carbon embryo with a layered three-dimensional distribution of pore structure is obtained after the combination, and then the activated carbon product is obtained after the activation process.

[0056] As a preferred technical solution of the present invention, the specific process of raw material processing in steps one to three is as follows: S1, pretreatment: particle size and ash content of the raw materials are processed; S2, carbonization: the raw materials after particle size and ash content processing are dried at a temperature of 170 to 600°C, and 80% of their organic tissues are carbonized.

[0057] As a preferred technical solution of the present invention, the specific processing flow in step 4 is as follows: S1, shaping treatment: after the prepared components A, B and C are mixed evenly with the activator and the composite binder respectively, they are extruded into a stacked and nested strip carbon embryo through a multi-layer co-extrusion extruder, and the core layer is respectively a mixture of component A, a mixture of component B and a mixture of component C, and then the strip carbon embryo is cut to a fixed length; S2, activation treatment: the cut carbon embryo is sent to an activation furnace for activation, and finally the finished product is washed and dried to obtain an activated carbon product with a layered three-dimensional distribution of pore structure. The composite binder is a mixture of inorganic clay and organic starch.

[0058] Embodiment 5:

[0059] See also Figure 1 The present invention provides a macroporous activated carbon for a carbon canister, comprising activated carbon, wherein the activated carbon comprises component A, component B and component C, wherein component A comprises the following components: by weight, 10 parts of sawdust, 30 parts of walnut shells, 30 parts of coconut shells, 10 parts of bagasse and 20 parts of furfural residues, component B comprises the following components: by weight, 23 parts of lignite and 40 parts of peat, and component C comprises the following components: by weight, 20 parts of furan resin, 20 parts of phenolic resin, 30 parts of urea-formaldehyde resin, 20 parts of polycarbonate, 5 parts of styrene-divinylbenzene copolymer and 5 parts of polyvinylidene chloride.

[0060] The present invention provides a method for preparing activated carbon for a carbon canister with a large pore volume, comprising the following steps:

[0061] Step 1, preparing component A: processing the raw materials for preparing A to obtain component A;

[0062] Step 2, preparing component B: processing the raw materials for preparing B to obtain component B;

[0063] Step 3, preparing component C: processing the raw materials for preparing C to obtain component C;

[0064] Step 4, preparing the finished product: After the shaping process, the components A, B, and C are combined according to the pore characteristic structure distribution, extruded and formed, and a carbon embryo with a layered three-dimensional distribution of pore structure is obtained after the combination, and then the activated carbon product is obtained after the activation process.

[0065] As a preferred technical solution of the present invention, the specific process of raw material processing in steps one to three is as follows: S1, pretreatment: particle size and ash content of the raw materials are processed; S2, carbonization: the raw materials after particle size and ash content processing are dried at a temperature of 170 to 600°C, and 80% of their organic tissues are carbonized.

[0066] As a preferred technical solution of the present invention, the specific processing flow in step 4 is as follows: S1, shaping treatment: after the prepared components A, B and C are mixed evenly with the activator and the composite binder respectively, they are extruded into a stacked and nested strip carbon embryo through a multi-layer co-extrusion extruder, and the core layer is respectively a mixture of component A, a mixture of component B and a mixture of component C, and then the strip carbon embryo is cut to a fixed length; S2, activation treatment: the cut carbon embryo is sent to an activation furnace for activation, and finally the finished product is washed and dried to obtain an activated carbon product with a layered three-dimensional distribution of pore structure. The composite binder is a mixture of inorganic clay and organic starch.

[0067] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A macroporous activated carbon for a carbon canister, comprising activated carbon, characterized in that: The activated carbon comprises component A, component B and component C, wherein component A comprises the following components: by weight, 10-30 parts of sawdust, 20-30 parts of walnut shells, 20-30 parts of coconut shells, 10-30 parts of bagasse and 10-30 parts of furfural residues; component B comprises the following components: by weight, 15-40 parts of lignite and 15-40 parts of peat; and component C comprises the following components: by weight, 10-25 parts of furan resin, 10-25 parts of phenolic resin, 20-30 parts of urea-formaldehyde resin, 20-30 parts of polycarbonate, 5-10 parts of styrene-divinylbenzene copolymer and 5-10 parts of polyvinylidene chloride.

2. The macroporous activated carbon for carbon canister according to claim 1, characterized in that: The component A comprises the following components: by weight, 30 parts of sawdust, 30 parts of walnut shells, 20 parts of coconut shells, 10 parts of bagasse and 10 parts of furfural residues; the component B comprises the following components: by weight, 30 parts of lignite and 20 parts of peat; the component C comprises the following components: by weight, 25 parts of furan resin, 25 parts of phenolic resin, 20 parts of urea-formaldehyde resin, 20 parts of polycarbonate, 5 parts of styrene-divinylbenzene copolymer and 5 parts of polyvinylidene chloride.

3. The macroporous activated carbon for carbon canister according to claim 1, characterized in that: The component A comprises the following components: 25 parts of sawdust, 20 parts of walnut shells, 20 parts of coconut shells, 25 parts of bagasse and 10 parts of furfural residues, by weight; the component B comprises the following components: 25 parts of lignite and 25 parts of peat, by weight; and the component C comprises the following components: 20 parts of furan resin, 25 parts of phenolic resin, 25 parts of urea-formaldehyde resin, 20 parts of polycarbonate, 5 parts of styrene-divinylbenzene copolymer and 5 parts of polyvinylidene chloride, by weight.

4. The macroporous activated carbon for carbon canister according to claim 1, characterized in that: The component A comprises the following components: 30 parts of sawdust, 20 parts of walnut shells, 20 parts of coconut shells, 15 parts of bagasse and 15 parts of furfural residues, by weight; the component B comprises the following components: 20 parts of lignite and 130 parts of peat, by weight; and the component C comprises the following components: 25 parts of furan resin, 20 parts of phenolic resin, 25 parts of urea-formaldehyde resin, 20 parts of polycarbonate, 5 parts of styrene-divinylbenzene copolymer and 5 parts of polyvinylidene chloride, by weight.

5. The macroporous activated carbon for carbon canister according to claim 1, characterized in that: The component A comprises the following components: by weight, 10 parts of sawdust, 30 parts of walnut shells, 30 parts of coconut shells, 10 parts of bagasse and 20 parts of furfural residues; the component B comprises the following components: by weight, 23 parts of lignite and 40 parts of peat; the component C comprises the following components: by weight, 20 parts of furan resin, 20 parts of phenolic resin, 30 parts of urea-formaldehyde resin, 20 parts of polycarbonate, 5 parts of styrene-divinylbenzene copolymer and 5 parts of polyvinylidene chloride.

6. The method for preparing a macroporous activated carbon for a carbon canister according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1, preparing component A: processing the raw materials for preparing A to obtain carbonized component A; Step 2, preparing component B: processing the raw materials for preparing B to obtain carbonized component B; Step 3, preparing component C: processing the raw materials for preparing C to obtain carbonized component C; Step 4, preparing the finished product: After the shaping process, the components A, B, and C are combined according to the pore characteristic structure distribution, extruded and formed, and a carbon embryo with a layered three-dimensional distribution of pore structure is obtained after the combination, and then the activated carbon product is obtained after the activation process.

7. The method for preparing a macroporous activated carbon for a carbon canister according to claim 6, characterized in that: The specific process of raw material processing in steps 1 to 3 is as follows: S1, pre-processing: processing the particle size and ash content of the raw materials; S2, carbonization: drying the raw materials after particle size and ash content processing at a temperature of 170 to 600° C., and carbonizing 80% of their organic tissues.

8. The method for preparing a macroporous activated carbon for a carbon canister according to claim 7, characterized in that: The specific processing flow in step 4 is as follows: S1, shaping treatment: after the prepared component A, component B and component C are mixed evenly with the activator and the composite binder respectively, they are extruded into a stacked and nested strip carbon embryo through a multi-layer co-extrusion extruder, and the core layer is respectively a mixture of component A, a mixture of component B and a mixture of component C. Then, the strip carbon embryo is cut into a fixed length; S2, activation treatment: the cut carbon embryo is sent to an activation furnace for activation, and finally the finished product is washed and dried to obtain an activated carbon product with a porous structure and a layered three-dimensional distribution.

9. The method for preparing a macroporous activated carbon for a carbon canister according to claim 8, characterized in that: The composite binder is a mixture of inorganic clay and organic starch.

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