A copper-potassium-containing activated carbon adsorbent capable of recyclably adsorbing hydrogen sulfide and its preparation method

Abstract

This invention discloses a copper-potassium-containing activated carbon adsorbent capable of recyclably adsorbing hydrogen sulfide and its preparation method. The preparation method includes the following steps: S1, weighing the components; S2, dissolving copper and potassium salts in deionized water, then adding oxalic acid and ammonium humate, and stirring until homogeneous to obtain mixed solution A; S3, adding carbon powder to a kneader, stirring, then adding mixed solution A, and continuing kneading to obtain sample B; S4, repeatedly extruding sample B in an extruder for more than 5 times, placing it at room temperature, and then drying it in an oven to obtain dried sample C; S5, placing dried sample C in a rotary kneader for high-temperature activation treatment in a mixed atmosphere of nitrogen and water vapor to obtain the copper-potassium-containing activated carbon adsorbent. Compared with traditional methods for preparing copper-containing activated carbon adsorbents, the copper-potassium-containing activated carbon prepared by this invention generates no waste liquid during preparation and regeneration, and the regeneration operation is simple. The regenerated activated carbon still exhibits excellent adsorption performance.

Description

Technical Field

[0001] This invention relates to the field of activated carbon adsorbent regeneration technology, specifically to a copper-potassium-containing activated carbon adsorbent capable of cyclically adsorbing hydrogen sulfide and its preparation method. Background Technology

[0002] Activated carbon adsorbents have a wide range of applications for removing low concentrations of hydrogen sulfide, such as from blast furnace gas, coke oven gas, and associated gas from oil fields. However, currently, most activated carbon adsorbents are used for single-use applications. After adsorption saturation, the activated carbon is often simply treated as fuel through sintering, leading to waste of activated carbon and increased carbon emissions.

[0003] Research on recyclable activated carbon adsorption has also begun to attract the attention of researchers. For example, Chinese patents CN202322235551 and CN202311047511 disclose a process and device for regenerating activated carbon for blast furnace gas desulfurization. The activated carbon can be regenerated through washing and extraction, heating and regeneration. However, this method contains a washing and extraction process, and the problem of waste liquid reprocessing still exists. Summary of the Invention

[0004] To address the problems existing in the regeneration of activated carbon in the prior art, this invention starts from the source of activated carbon preparation and provides a copper-potassium activated carbon adsorbent with recyclable hydrogen sulfide and its preparation method. Compared with the traditional preparation of copper-containing activated carbon adsorption, the copper-potassium activated carbon prepared by this invention generates no waste liquid during the preparation and regeneration process, and the regeneration operation is simple. The regenerated activated carbon still exhibits excellent adsorption performance.

[0005] The present invention adopts the following technical solution:

[0006] A copper-potassium activated carbon adsorbent capable of cyclically adsorbing hydrogen sulfide is prepared from the following raw materials in parts by weight:

[0007]

[0008] Preferably, the copper-potassium activated carbon adsorbent is prepared from the following raw materials in parts by weight:

[0009]

[0010] The carbon powder is fine carbon powder particles with a mesh size between 200 and 400 mesh.

[0011] The copper salt is one or more of copper sulfate, copper nitrate, copper chloride, and copper acetate.

[0012] The potassium salt is one or more of potassium sulfate, potassium nitrate, potassium chloride, and potassium carbonate.

[0013] A method for preparing a copper-potassium-containing activated carbon adsorbent capable of cyclically adsorbing hydrogen sulfide includes the following steps:

[0014] S1. Weigh each component according to the specified mass ratio and set aside;

[0015] S2. Dissolve copper salt and potassium salt in deionized water, then add oxalic acid and ammonium humate, and stir until homogeneous to obtain mixed solution A;

[0016] S3. Add charcoal powder to the kneader, start the kneader to stir, and slowly add mixed solution A. After adding all the solution, continue kneading for 2 to 24 hours to obtain sample B.

[0017] S4. Place the kneaded sample B into an extruder and repeatedly extrude it into strips more than 5 times. After forming the strips, place them at room temperature for 12 to 24 hours, and then place them in an oven at 110°C for 12 to 24 hours to dry them, thus obtaining dried sample C.

[0018] S5. Finally, place the dried sample C into a rotary kiln and perform high-temperature activation treatment for 3 to 12 hours in a mixed atmosphere of nitrogen and water vapor to obtain copper-potassium activated carbon adsorbent.

[0019] The volume ratio of nitrogen gas to water vapor added in step S5 is (3-5):1, and the temperature of the water vapor is 120-170℃.

[0020] The high-temperature activation temperature in step S5 is 500–700°C.

[0021] A copper-potassium activated carbon adsorbent, or a copper-potassium activated carbon adsorbent prepared by a specific method, is disclosed for regeneration in the adsorption of hydrogen sulfide. The hydrogen sulfide adsorption atmosphere of the copper-potassium activated carbon adsorbent is as follows: H₂S content 500–1000 ppm, CO content 25–28%, CO₂ content 10–15%, O₂ content 0.1–0.5%, water vapor content 0–5%, and the remainder being nitrogen. The working space velocity of the copper-potassium activated carbon adsorbent is 2000–5000 h⁻¹. -1 .

[0022] The regeneration conditions for the copper-potassium activated carbon adsorbent are as follows: the copper-potassium activated carbon adsorbent is treated at 180-220°C for 5-20 hours in a gas free of hydrogen sulfide.

[0023] The technical solution of this invention has the following advantages:

[0024] A. This invention starts from the source of activated carbon preparation, by directly adding copper and potassium elements to the carbon powder, which on the one hand increases the adsorption capacity of activated carbon for sulfur sulfide, and on the other hand effectively reduces the temperature required for activated carbon activation; the addition of oxalic acid and humic acid ammonia enhances the mechanical strength of activated carbon; and the specific surface area of ​​activated carbon is increased by using a specific nitrogen to water vapor ratio.

[0025] B. Compared with traditional methods of preparing copper-containing activated carbon adsorbents, the copper-potassium activated carbon adsorbent prepared by this invention produces no waste liquid during both preparation and regeneration processes, and the regeneration operation is simple. The regenerated activated carbon still exhibits excellent adsorption performance. Detailed Implementation

[0026] The technical solution of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example 1:

[0028] This embodiment provides a method for preparing a copper-potassium activated carbon adsorbent capable of cyclically adsorbing hydrogen sulfide, comprising the following steps:

[0029] S1. Dissolve 10.6g of copper nitrate and 8.3g of potassium chloride in 20.0g of deionized water, then add 5.2g of oxalic acid and 7.8g of ammonium humate, stir well and set aside.

[0030] S2. Place 100.0g of 300-mesh charcoal powder into a kneader, start the kneader and stir, then slowly add the above solution. After adding all the solution, continue kneading for 6 hours.

[0031] S3. Place the kneaded sample into an extruder and repeatedly extrude it into strips 6 times. Place the strips into strips at room temperature for 15 hours, and then place them in an oven at 110°C for 12 hours to dry.

[0032] S4. Finally, the dried sample was placed in a rotary kiln, and a mixed atmosphere of nitrogen gas at a rate of 5 L / min and water vapor at a rate of 1 L / min was introduced. The temperature was increased to 600°C at a rate of 5°C / min, and held for 6 hours. Then, the water vapor was turned off, and the sample was cooled to room temperature to obtain a copper-potassium-containing activated carbon adsorbent. Its specific surface area was measured to be 1128 m². 2 / g.

[0033] Adsorption performance test: The hydrogen sulfide adsorption atmosphere of the adsorbent was: H2S content 500ppm, CO content 25%, CO2 content 15%, O2 content 0.2%, water vapor content 2.0%, and the remainder being nitrogen; the working space velocity of the adsorbent was 2000h⁻¹. -1 The adsorption performance of the adsorbent for hydrogen sulfide (based on the breakthrough sulfur capacity of 5% hydrogen sulfide) is approximately 6.9% sulfur capacity.

[0034] The adsorbent regeneration conditions were as follows: the adsorbent was treated at 180°C for 10 hours in a hydrogen sulfide-free atmosphere, then cooled to room temperature to obtain the regenerated activated carbon adsorbent. Its hydrogen sulfide adsorption performance was tested, and the results after this cycle are shown in the table below:

[0035] Table 1. Adsorption performance of hydrogen sulfide on the sample from Example 1 (based on the breakthrough sulfur capacity of 5% hydrogen sulfide).

[0036] frequency 1 2 3 4 5 6 7 8 Sulfur capacity 6.8％ 6.9％ 6.8％ 6.7％ 6.9％ 6.9％ 6.8％ 6.9％

[0037] Example 2:

[0038] This embodiment provides a method for preparing a copper-potassium activated carbon adsorbent capable of cyclically adsorbing hydrogen sulfide, comprising the following steps:

[0039] S1. Dissolve 22.0g of copper sulfate and 15.2g of potassium nitrate in 50.0g of deionized water, then add 14.6g of oxalic acid and 16.2g of ammonium humate, stir well and set aside.

[0040] S2. Place 200.0g of 200-mesh charcoal powder into a kneader, start the kneader to stir, and slowly add the above solution. After adding all the solution, continue kneading for 8 hours.

[0041] S3. Place the kneaded sample into an extruder and repeatedly extrude it into strips 8 times. Place the strips into room temperature for 12 hours, and then place them in an oven at 110°C for 15 hours to dry.

[0042] S4. Finally, the dried sample was placed in a rotary kiln and heated to 650°C at a rate of 5°C / min in a mixed atmosphere of nitrogen (6 L / min) and water vapor (2 L / min). The temperature was maintained for 4 hours, then the water vapor was turned off, and the sample was cooled to room temperature to obtain a copper-potassium-containing activated carbon adsorbent. Its specific surface area was measured to be 1241 m². 2 / g.

[0043] Adsorption performance test: The hydrogen sulfide adsorption atmosphere of the adsorbent was: H2S content 700ppm, CO content 26%, CO2 content 12%, O2 content 0.1%, water vapor content 3.0%, and the remainder being nitrogen; the working space velocity of the adsorbent was 3500h⁻¹. -1The adsorption performance of the adsorbent for hydrogen sulfide (based on the breakthrough sulfur capacity of 5% hydrogen sulfide) is approximately 7.3% sulfur capacity.

[0044] The adsorbent regeneration conditions were as follows: the adsorbent was treated at 190°C for 15 hours in a hydrogen sulfide-free atmosphere, then cooled to room temperature to obtain the regenerated activated carbon adsorbent. Its hydrogen sulfide adsorption performance was tested, and the results after this cycle are shown in the table below:

[0045] Table 2. Adsorption performance of hydrogen sulfide on the sample of Example 2 (based on the breakthrough sulfur capacity of 5% hydrogen sulfide).

[0046]

[0047]

[0048] Example 3:

[0049] S1. Dissolve 16.3g of copper chloride and 10.5g of potassium carbonate in 35.0g of deionized water, then add 12.8g of oxalic acid and 18.0g of ammonium humate, stir well and set aside.

[0050] S2. Place 150.0g of 400-mesh charcoal powder into a kneader, start the kneader to stir, and slowly add the above solution. After adding all the solution, continue kneading for 12 hours.

[0051] S3. Place the kneaded sample into an extruder and repeatedly extrude it into strips 6 times. Place the strips into strips at room temperature for 10 hours, and then place them in an oven at 110°C for 20 hours to dry.

[0052] S4. Finally, the dried sample was placed in a rotary kiln and heated to 700°C at a rate of 5°C / min with a mixed atmosphere of nitrogen (8 L / min) and water vapor (2 L / min). The temperature was maintained for 10 hours, then the water vapor was turned off, and the sample was cooled to room temperature to obtain a copper-potassium-containing activated carbon adsorbent. Its specific surface area was measured to be 1352 m². 2 / g.

[0053] Adsorption performance test: The hydrogen sulfide adsorption atmosphere of the adsorbent was: H2S content 1000ppm, CO content 28%, CO2 content 15%, O2 content 0.3%, water vapor content 4.5%, and the remainder being nitrogen; the working space velocity of the adsorbent was 5000h⁻¹. -1 The adsorption performance of the adsorbent for hydrogen sulfide (based on the breakthrough sulfur capacity of 5% hydrogen sulfide) is approximately 7.9% sulfur capacity.

[0054] The adsorbent regeneration conditions were as follows: the adsorbent was treated at 220°C for 8 hours in a hydrogen sulfide-free atmosphere, then cooled to room temperature to obtain the regenerated activated carbon adsorbent. Its hydrogen sulfide adsorption performance was tested, and the results after this cycle are shown in the table below:

[0055] Table 3. Adsorption performance of hydrogen sulfide on the sample of Example 3 (based on the breakthrough sulfur capacity of 5% hydrogen sulfide).

[0056] frequency 1 2 3 4 5 6 7 8 Sulfur capacity 7.9％ 8.0％ 7.9％ 7.8％ 8.1％ 8.0％ 8.0％ 7.9％

[0057] Example 4:

[0058] This embodiment provides a method for preparing a copper-potassium activated carbon adsorbent capable of cyclically adsorbing hydrogen sulfide, comprising the following steps:

[0059] S1. Dissolve 30g of copper nitrate and 1g of potassium chloride in 30g of deionized water, then add 10g of oxalic acid and 5g of ammonium humate, stir well and set aside.

[0060] S2. Place 100.0g of 400-mesh charcoal powder into a kneader, start the kneader to stir, and slowly add the above solution. After adding all the solution, continue kneading for 2 hours.

[0061] S3. Place the kneaded sample into an extruder and repeatedly extrude it into strips 6 times. Place the strips into strips at room temperature for 24 hours, and then place them in an oven at 110°C for 24 hours to dry.

[0062] S4. Finally, the dried sample is placed in a rotary kiln, and a mixed atmosphere of nitrogen gas at a rate of 4 L / min and water vapor at a rate of 1 L / min is introduced. The temperature is increased to 500°C at a rate of 5°C / min, and maintained for 3 hours. Then, the water vapor is turned off, and the sample is cooled to room temperature to obtain a copper-potassium-containing activated carbon adsorbent. Its specific surface area is measured to be 1120 m². 2 / g.

[0063] Adsorption performance test: The hydrogen sulfide adsorption atmosphere of the adsorbent was: H2S content 600ppm, CO content 27%, CO2 content 10%, O2 content 0.4%, water vapor content 1.0%, and the remainder being nitrogen; the working space velocity of the adsorbent was 3000h⁻¹. -1 The adsorption performance of the adsorbent for hydrogen sulfide (based on the breakthrough sulfur capacity of 5% hydrogen sulfide) is approximately 7.0% sulfur capacity.

[0064] The conditions for adsorbent regeneration are as follows: after treating the adsorbent at 200°C for 20 hours in an atmosphere free of hydrogen sulfide, the temperature is lowered to room temperature to obtain the regenerated activated carbon adsorbent.

[0065] Example 5:

[0066] This embodiment provides a method for preparing a copper-potassium activated carbon adsorbent capable of cyclically adsorbing hydrogen sulfide, comprising the following steps:

[0067] S1. Dissolve 1g of copper sulfate and 30g of potassium nitrate in 10g of deionized water, then add 1g of oxalic acid and 10g of ammonium humate, stir well and set aside.

[0068] S2. Place 100.0g of 200-mesh charcoal powder into a kneader, start the kneader and stir, then slowly add the above solution. After adding all the solution, continue kneading for 24 hours.

[0069] S3. Place the kneaded sample into an extruder and repeatedly extrude it into strips 7 times. Place the strips into strips at room temperature for 12 hours, and then place them in an oven at 110°C for 18 hours to dry.

[0070] S4. Finally, the dried sample was placed in a rotary kiln and heated to 550°C at a rate of 5°C / min with a mixed atmosphere of nitrogen (6 L / min) and water vapor (2 L / min). The temperature was maintained for 12 hours, then the water vapor was turned off, and the sample was cooled to room temperature to obtain a copper-potassium-containing activated carbon adsorbent. Its specific surface area was measured to be 1252 m². 2 / g.

[0071] Adsorption performance test: The hydrogen sulfide adsorption atmosphere of the adsorbent was: H2S content 900ppm, CO content 26%, CO2 content 14%, O2 content 0.5%, water vapor content 5.0%, and the remainder being nitrogen; the working space velocity of the adsorbent was 4500h⁻¹. -1 The adsorption performance of the adsorbent for hydrogen sulfide (based on the breakthrough sulfur capacity of 5% hydrogen sulfide) is approximately 7.1% sulfur capacity.

[0072] The conditions for adsorbent regeneration are as follows: after treating the adsorbent at 210°C for 5 hours in the above-mentioned hydrogen sulfide-free atmosphere, the temperature is cooled to room temperature to obtain the regenerated activated carbon adsorbent.

[0073] Example 6:

[0074] This embodiment provides a method for preparing a copper-potassium activated carbon adsorbent capable of cyclically adsorbing hydrogen sulfide, comprising the following steps:

[0075] S1. Dissolve 25g of copper sulfate and 10g of potassium nitrate in 25g of deionized water, then add 5g of oxalic acid and 8g of ammonium humate, stir well and set aside.

[0076] S2. Put 100g of 200-mesh charcoal powder into a kneader, start the kneader to stir, and slowly add the above solution. After adding all the solution, continue kneading for 8 hours.

[0077] S3. Place the kneaded sample into an extruder and repeatedly extrude it into strips 8 times. Place the strips into room temperature for 12 hours, and then place them in an oven at 110°C for 15 hours to dry.

[0078] S4. Finally, the dried sample was placed in a rotary kiln and heated to 650°C at a rate of 5°C / min in a mixed atmosphere of nitrogen (6 L / min) and water vapor (2 L / min). The temperature was maintained for 4 hours, then the water vapor was turned off, and the sample was cooled to room temperature to obtain a copper-potassium-containing activated carbon adsorbent. Its specific surface area was measured to be 1241 m². 2 / g.

[0079] Adsorption performance test: The hydrogen sulfide adsorption atmosphere of the adsorbent was: H2S content 700ppm, CO content 26%, CO2 content 12%, O2 content 0.1%, water vapor content 3.0%, and the remainder being nitrogen; the working space velocity of the adsorbent was 3500h⁻¹. -1 The adsorption performance of the adsorbent for hydrogen sulfide (based on the breakthrough sulfur capacity of 5% hydrogen sulfide) is approximately 7.4% sulfur capacity.

[0080] The adsorbent regeneration conditions were as follows: the adsorbent was treated at 190°C for 15 hours in a hydrogen sulfide-free atmosphere, then cooled to room temperature to obtain the regenerated activated carbon adsorbent. Its hydrogen sulfide adsorption performance was tested, and the results after this cycle are shown in the table below:

[0081] Table 4. Adsorption performance of hydrogen sulfide on sample 6 of Example 4 (based on breakthrough sulfur capacity of 5% hydrogen sulfide).

[0082] frequency 1 2 3 4 5 6 7 8 Sulfur capacity 7.3％ 7.3％ 7.5％ 7.6％ 7.2％ 7.3％ 7.5％ 7.5％

[0083] Example 7:

[0084] S1. Dissolve 10g of copper chloride and 25g of potassium carbonate in 15g of deionized water, then add 7g of oxalic acid and 6g of ammonium humate, stir well and set aside.

[0085] S2. Put 100g of 400-mesh charcoal powder into a kneader, start the kneader to stir, and slowly add the above solution. After adding all the solution, continue kneading for 12 hours.

[0086] S3. Place the kneaded sample into an extruder and repeatedly extrude it into strips 6 times. Place the strips into strips at room temperature for 10 hours, and then place them in an oven at 110°C for 20 hours to dry.

[0087] S4. Finally, the dried sample was placed in a rotary kiln and heated to 700°C at a rate of 5°C / min with a mixed atmosphere of nitrogen (8 L / min) and water vapor (2 L / min). The temperature was maintained for 10 hours, then the water vapor was turned off, and the sample was cooled to room temperature to obtain a copper-potassium-containing activated carbon adsorbent. Its specific surface area was measured to be 1352 m². 2 / g.

[0088] Adsorption performance test: The hydrogen sulfide adsorption atmosphere of the adsorbent was: H2S content 1000ppm, CO content 28%, CO2 content 15%, O2 content 0.3%, water vapor content 4.5%, and the remainder being nitrogen; the working space velocity of the adsorbent was 5000h⁻¹. -1 The adsorption performance of the adsorbent for hydrogen sulfide (based on the breakthrough sulfur capacity of 5% hydrogen sulfide) is approximately 7.7% sulfur capacity.

[0089] The adsorbent regeneration conditions were as follows: the adsorbent was treated at 220°C for 8 hours in a hydrogen sulfide-free atmosphere, then cooled to room temperature to obtain the regenerated activated carbon adsorbent. Its hydrogen sulfide adsorption performance was tested, and the results after this cycle are shown in the table below:

[0090] Table 5. Adsorption performance of hydrogen sulfide on the sample of Example 7 (based on the breakthrough sulfur capacity of 5% hydrogen sulfide).

[0091] frequency 1 2 3 4 5 6 7 8 Sulfur capacity 7.8％ 7.7％ 7.9％ 7.7％ 7.5％ 7.6％ 7.6％ 7.9％

[0092] This invention addresses the issue from the very beginning of activated carbon preparation by directly adding copper and potassium to the carbon powder. This increases the adsorption capacity of activated carbon for sulfur sulfide and effectively lowers the activation temperature required for activated carbon. The addition of oxalic acid and ammonia humate enhances the mechanical strength of the activated carbon. Furthermore, a specific nitrogen-to-water vapor ratio increases the specific surface area of ​​the activated carbon. In addition, compared to traditional methods of preparing copper-containing activated carbon, the copper-potassium activated carbon prepared by this invention generates no waste liquid during preparation and regeneration, the regeneration process is simple, and the regenerated activated carbon still exhibits excellent adsorption performance.

[0093] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A copper-potassium activated carbon adsorbent capable of cyclically adsorbing hydrogen sulfide, characterized in that, It is prepared from the following raw materials in parts by weight: 100 parts charcoal powder; 1-30 parts copper salt; Potassium salt 1-30 parts; Oxalic acid 1-10 parts; 5-10 parts of ammonium humate; 10-30 parts deionized water; And it is prepared by the following steps: S1. Weigh each component according to the specified mass ratio and set aside; S2. Dissolve copper salt and potassium salt in deionized water, then add oxalic acid and ammonium humate, and stir until homogeneous to obtain mixed solution A; S3. Add charcoal powder to the kneader, start the kneader to stir, and slowly add mixed solution A. After adding all the solution, continue kneading for 2 to 24 hours to obtain sample B. S4. Place the kneaded sample B into an extruder and repeatedly extrude it into strips more than 5 times. After forming the strips, place them at room temperature for 12 to 24 hours, and then place them in an oven at 110°C for 12 to 24 hours to dry them, thus obtaining dried sample C. S5. Finally, place the dried sample C into a rotary kiln and perform high-temperature activation treatment for 3 to 12 hours in a mixed atmosphere of nitrogen and water vapor to obtain copper-potassium activated carbon adsorbent.

2. The copper-potassium activated carbon adsorbent for recyclable adsorption of hydrogen sulfide according to claim 1, characterized in that, It is prepared from the following raw materials in parts by weight: 100 parts charcoal powder; 10-25 parts copper salt; Potassium salt 10-25 parts; 5-7 parts oxalic acid; 6-8 parts of ammonium humate; 15-25 parts deionized water.

3. The copper-potassium activated carbon adsorbent for recyclable adsorption of hydrogen sulfide according to claim 1, characterized in that, The carbon powder is fine carbon powder particles with a mesh size between 200 and 400 mesh.

4. The copper-potassium activated carbon adsorbent for recyclable adsorption of hydrogen sulfide according to claim 1, characterized in that, The copper salt is one or more of copper sulfate, copper nitrate, copper chloride, and copper acetate.

5. The copper-potassium activated carbon adsorbent for recyclable adsorption of hydrogen sulfide according to claim 1, characterized in that, The potassium salt is one or more of potassium sulfate, potassium nitrate, potassium chloride, and potassium carbonate.

6. A method for preparing a copper-potassium activated carbon adsorbent capable of cyclically adsorbing hydrogen sulfide, characterized in that, Includes the following steps: S1. Weigh each component according to the specified mass ratio and set aside; S2. Dissolve copper salt and potassium salt in deionized water, then add oxalic acid and ammonium humate, and stir until homogeneous to obtain mixed solution A; S3. Add charcoal powder to the kneader, start the kneader to stir, and slowly add mixed solution A. After adding all the solution, continue kneading for 2 to 24 hours to obtain sample B. S4. Place the kneaded sample B into an extruder and repeatedly extrude it into strips more than 5 times. After forming the strips, place them at room temperature for 12 to 24 hours, and then place them in an oven at 110°C for 12 to 24 hours to dry them, thus obtaining dried sample C. S5. Finally, place the dried sample C into a rotary kiln and perform high-temperature activation treatment for 3 to 12 hours in a mixed atmosphere of nitrogen and water vapor to obtain copper-potassium activated carbon adsorbent.

7. The preparation method according to claim 6, characterized in that, The volume ratio of nitrogen gas to water vapor added in step S5 is (3-5):1, and the temperature of the water vapor is 120-170℃.

8. The preparation method according to claim 7, characterized in that, The high-temperature activation temperature in step S5 is 500–700°C.

9. The regeneration application of the copper-potassium activated carbon adsorbent according to any one of claims 1-5 or the copper-potassium activated carbon adsorbent prepared by the preparation method according to any one of claims 6-8 in the adsorption of hydrogen sulfide, characterized in that, The hydrogen sulfide adsorption atmosphere of the copper-potassium activated carbon adsorbent is as follows: H2S content 500-1000 ppm, CO content 25-28%, CO2 content 10-15%, O2 content 0.1-0.5%, water vapor content 0-5%, and the remainder is nitrogen; the working space velocity of the copper-potassium activated carbon adsorbent is 2000-5000 h⁻¹. -1 .

10. The recycling application according to claim 9, characterized in that, The regeneration conditions for the copper-potassium activated carbon adsorbent are as follows: the copper-potassium activated carbon adsorbent is treated at 180–220°C for 5–20 hours in a gas free of hydrogen sulfide.

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