Sulfur-containing malodorous gas enrichment material, preparation and use thereof

Abstract

The application belongs to the technical field of environmental pollution treatment, and specifically discloses a preparation method of a sulfur-containing foul-smelling gas enrichment material, which comprises the following steps: performing solvothermal treatment on a solution containing biomass raw materials and an alkaline substance, and collecting carbon materials; and compounding the carbon materials with a metal source and performing carbonization treatment, so as to obtain the sulfur-containing foul-smelling gas enrichment material; the metal source contains three or more than three elements selected from copper, iron, zinc, silver and nickel; the application further comprises the material prepared by the preparation method and the application of the material. According to the technical scheme, the alkali-assisted solvothermal treatment and the composite metal roasting process are combined, so that the combined enrichment performance and selectivity of different sulfur-containing foul-smelling gases can be realized, and the efficient enrichment of trace sulfur-containing foul-smelling gases can be realized.

Description

Technical Field

[0001] This invention belongs to the field of environmental pollution control technology, specifically relating to a highly efficient enrichment material for trace odorous gases. Background Technology

[0002] With the rapid development of urbanization, people's requirements for the quality of their living environment are also increasing. Because odorous substances have a low odor threshold, even at extremely low concentrations, their perceived odor intensity is quite strong, leading to a growing concern about their impact on urban residential areas. Therefore, the detection of trace odorous gases in the environment has become particularly important.

[0003] Currently, there are two main methods for determining trace odorous gases. One method involves online detection of the gas using precision analytical instruments. This method requires very high detection limits and precision from the instruments, which general instruments cannot meet. The other method, which is also the most commonly used, involves enriching the gas and then manually injecting it into an analyzer to determine the concentration of the target gas.

[0004] Commonly used enrichment methods include solvent absorption, cryogenic trapping, and solid enrichment. Solvent absorption has a narrow application range, and solvents can easily cause interference, making it unsuitable for the enrichment and detection of trace organic odorous gases. Cryogenic trapping utilizes a low-temperature environment provided by electronic refrigeration or liquid nitrogen refrigeration to condense and enrich odorous gases, resulting in high enrichment efficiency, which increases exponentially with decreasing temperature. Patents such as "An Automatic Purging and Enrichment Device for Trace Gases" (CN 114441283 A), "An Integrated Cold Trap for Cryogenic Enrichment and Thermal Desorption of Trace Volatile Organic Compounds" (CN 109865309 A), "A Four-Stage Cold Trap Atmospheric Pre-Concentrator and Its Concentration Method" (CN 114705532 A), and "An Electronic Refrigeration Atmospheric Pre-Concentrator" (CN104792604 A) are all based on this approach. However, the condensation temperature of most trace organic odorous gases is at or below -100°C, resulting in high condensation costs and expensive equipment, which limits the widespread adoption of such technologies and devices.

[0005] Solid enrichment methods utilize solid materials such as carbon, molecular sieves, and alumina to enrich and remove odorous gases. Carbon is a popular material for this purpose due to its wide availability, low energy consumption, mature technology, and ease of application. However, because odorous gases are diverse, practical applications often require physical or chemical modification of carbon materials to enhance their activity. Patents such as "An Ozone-Nitrogen Doped Porous Biomass Carbon Composite Material and Its Preparation Method" (CN 113274979 A), "A Modified Activated Carbon Hydrogen Sulfide Adsorbent and Its Preparation Method" (CN 103521176 A), "A Preparation Method of Thiol-Modified Activated Carbon for Odor Removal" (CN 109967036 A), and "An Ammonia Adsorbent and Its Preparation Method" (CN 113231009 A) are all based on this approach and represent technological development. However, most of the malodorous substances in malodorous gases are trace amounts. If carbon materials cannot provide a strong enrichment effect, then the defects that are common when using carbon materials for enrichment, such as poor selectivity, low enrichment efficiency, and easy shedding during the enrichment process, will become particularly prominent. Summary of the Invention

[0006] To overcome the problems of unsatisfactory enrichment capacity and selectivity of carbon materials for sulfur-containing odorous gases, especially trace amounts of odorous substances, the primary objective of this invention is to provide a method for preparing a sulfur-containing odorous gas enrichment material, aiming to prepare a material that can efficiently enrich odorous gases and improve enrichment selectivity.

[0007] The second objective of this invention is to provide a highly efficient enrichment material obtained by the aforementioned preparation method.

[0008] The third objective of this invention is to provide the application of the highly efficient enrichment material prepared by the method in the enrichment of sulfur-containing odorous gases, especially trace amounts of sulfur-containing odorous gases.

[0009] Sulfur-containing odorous gases are diverse, including methanethiol, dimethyl sulfide, dimethyl disulfide, and carbon disulfide, among others. These gases exhibit significant differences in properties and enrichment behaviors. Furthermore, the difficulty of universally enriching trace amounts of sulfur-containing odorous gases increases exponentially. Existing carbon materials require improvements in enrichment efficiency, capacity, selectivity, and stability for various sulfur-containing odorous gases, particularly trace amounts. To address this issue, this invention provides the following solution:

[0010] A method for preparing a sulfur-containing odorous gas enrichment material involves solvothermal treatment of a solution containing biomass raw materials and alkaline substances to collect carbon material.

[0011] The carbon material is combined with a metal source and then subjected to carbonization treatment to obtain the desired product.

[0012] The metal source contains three or more elements selected from copper, iron, zinc, silver, and nickel.

[0013] In this invention, the innovative approach of using alkali-assisted solvothermal treatment and assisted carbonization roasting of the ternary or higher metals achieves synergy, which helps to improve the adsorption performance of the prepared material for sulfur-containing odorous gases. In particular, it exhibits excellent enrichment capacity, enrichment selectivity, and enrichment stability for trace amounts of sulfur-containing odorous gases. Furthermore, it can significantly improve enrichment efficiency and enhance the universality of the material for different sulfur-containing odorous gases.

[0014] In this invention, the biomass is at least one of the following: camellia oleifera shells, chili stalks, peanut shells, bean stalks, and Chinese medicinal residue.

[0015] In this invention, the alkali-assisted solvothermal process is combined with the ternary or higher-element roasting process to improve the enrichment efficiency, capacity, and selectivity of sulfur-containing odorous gases.

[0016] In this invention, the alkaline substance is at least one of an alkali metal hydroxide, a carbonate, a bicarbonate, and ammonia water; more preferably, it is an alkali metal hydroxide, and even more preferably, sodium hydroxide. Studies have found that preferred alkali metal hydroxides, especially sodium hydroxide, can bring about a better synergistic effect and can unexpectedly further improve the enrichment performance of sulfur-containing odorous gases.

[0017] Preferably, the solvent in the solution is water, or a mixture of water and an organic solvent. The organic solvent is a water-miscible solvent, such as an alcohol or THF.

[0018] Preferably, the weight percentage concentration of the alkaline substance in the solution is 5% to 15%, more preferably 8% to 10%, and even more preferably 8% to 9%. Preferably, at the preferred concentration, it helps to further improve the adsorption capacity and adsorption selectivity of the prepared material for sulfur-containing odorous gases.

[0019] Preferably, the mass-volume concentration of the biomass raw material in the solution is 50–300 g / L, and more preferably 100–150 g / L.

[0020] In this invention, the method is characterized by a solvothermal temperature of 180–300°C, more preferably 200–250°C, and even more preferably 200–220°C. Studies have found that at the preferred temperature, process synergy can be further improved, and the enrichment performance of the prepared material for trace amounts of sulfur-containing odorous gases can be further improved.

[0021] Preferably, the solvothermal time is 10–20 h, more preferably 14–17 h;

[0022] Preferably, after solvothermal treatment, the product is washed until the pH of the filtrate is 6.5-7.5 (preferably neutral) to obtain the carbon material.

[0023] In this invention, the combined roasting of ternary or higher metals among the metal elements is the key to the synergistic effect of solvothermal combined roasting with alkali-assisted roasting.

[0024] Preferably, the metal source includes at least a copper source;

[0025] Preferably, the metal source includes a copper source, an iron source, and a nickel source, and preferably the weight ratio of the copper source, iron source, and nickel source is 0.5-1.5:0.5-1.5:0.5-1.5, more preferably 1-1.5:0.5-1:0.5-1.

[0026] Alternatively, the metal source may include a copper source, a zinc source, and a silver source; preferably, the weight ratio of the copper source, zinc source, and silver source is 0.5–1.5:0.5–1.5:0.5–1.5, more preferably 1–1.5:0.5–1:0.5–1.

[0027] The study found that the optimal combination of copper, iron and nickel sources can unexpectedly achieve better synergy, which helps to further improve the adsorption capacity and selectivity of sulfur-containing odorous gases, especially the adsorption capacity of trace odorous gases.

[0028] In this invention, the metal source is a water-soluble salt of various metals, preferably at least one of nitrates, sulfates, and acetates;

[0029] Preferably, the weight ratio of the metal source to the carbon material is 0.1–2:1; more preferably 0.3–1:1; and even more preferably 0.7–1:1. Studies have found that under the preferred conditions, the adsorption capacity and selectivity of the prepared material for sulfur-containing odorous gases can be further synergistically improved.

[0030] In this invention, a liquid-phase composite method is used to combine carbon materials and metal sources;

[0031] Preferably, the liquid-phase composite method includes the step of mixing the carbon material in a metal source solution and then removing the solvent;

[0032] Preferably, a dispersant is also added to the metal source solution;

[0033] Preferably, the dispersant is at least one selected from ethylene glycol, isopropanol, isobutanol, and cyclohexanol;

[0034] Preferably, the weight ratio of dispersant to carbon material is 1:1 to 10.

[0035] In this invention, the carbonization process is carried out under a protective atmosphere;

[0036] Preferably, the carbonization process is carried out at a temperature of 500–900°C, and more preferably at 700–750°C. Studies have found that at the preferred temperature, the adsorption capacity and selectivity of the prepared material for sulfur-containing odorous gases can be further synergistically improved.

[0037] Preferably, the carbonization time is 1 to 3 hours;

[0038] Preferably, after carbonization, the material is washed with an alcohol solvent and then dried to obtain the sulfur-containing odorous gas enrichment material.

[0039] A more specific preparation method of the present invention includes the following steps:

[0040] Step (1):

[0041] The biomass raw material is crushed and sieved to make its particle size less than or equal to 100 mesh. The obtained biomass powder is soaked in alkaline solution and subjected to solvothermal treatment. Then it is washed with deionized water until neutral and dried to obtain carbon material.

[0042] Step (2):

[0043] The above-mentioned carbon material was placed in a composite metal solution, mixed evenly, and then a dispersant was added. The mixture was heated and stirred until viscous, dried, and then carbonized. After washing with anhydrous ethanol and drying, a highly efficient enriching material was obtained.

[0044] The present invention also provides a sulfur-containing odorous gas enrichment material prepared by the aforementioned preparation method.

[0045] The material described in this invention comprises a carbon substrate and nanoparticles of the ternary or higher metals in situ composited on its framework.

[0046] This invention also provides an application of the sulfur-containing odorous gas enrichment material prepared by the above preparation method, using it as an adsorbent material for sulfur-containing odorous gases.

[0047] Preferably, the sulfur-containing odorous gas includes at least one of methanethiol, dimethyl sulfide, dimethyl disulfide, and carbon disulfide;

[0048] Preferably, it is used for the adsorption of trace amounts of sulfur-containing odorous gases;

[0049] Preferably, the content of the trace sulfur-containing odorous gas is less than or equal to 100 mg / m³. 3 ;

[0050] Preferably, it selectively adsorbs sulfur-containing odorous gases from a mixed atmosphere containing sulfur-containing odorous gases and at least one of hydrocarbon benzene and alkylamine.

[0051] Beneficial effects

[0052] In this invention, the innovative approach of using alkali-assisted solvothermal treatment and assisted carbonization roasting of the ternary or higher metals achieves synergy, which helps to improve the adsorption performance of the prepared material for sulfur-containing odorous gases. In particular, it exhibits excellent enrichment capacity, enrichment selectivity, and enrichment stability for trace amounts of sulfur-containing odorous gases. Furthermore, it can significantly improve enrichment efficiency and enhance the universality of the material for different sulfur-containing odorous gases.

[0053] The raw materials for this invention are widely available and low in cost, and it can also solve the problem of environmental pollution, making it green and environmentally friendly. Attached Figure Description

[0054] Figure 1 SEM image of the highly efficient enrichment material prepared in Example 1;

[0055] Figure 2 The image shows the XRD pattern of the highly efficient enrichment material prepared in Example 1.

[0056] Figure 3 The image shows the removal effect of the highly efficient enrichment material prepared in Example 1;

[0057] Figure 4 The graph shows the cycling performance of the high-efficiency enrichment material prepared in Example 1. Specific implementation methods

[0058] Enrichment removal steps:

[0059] Step 1: First, prepare sulfur-containing odorous gases such as methanethiol, dimethyl sulfide, dimethyl disulfide, and carbon disulfide in the gas tank, with a concentration of 10 mg / m3 for each gas. Nitrogen is used as a protective gas to avoid interference from other gases.

[0060] Step 2: Add a high-efficiency enrichment material into the enrichment column, and then form a closed circuit of gas tank-enrichment column-gas pump-gas tank. Use the gas pump to achieve the enrichment of gas by the high-efficiency enrichment material. The enrichment temperature is 25℃, and the flow rate of the mixed gas through the enrichment column is 100ml / min.

[0061] Step 3: The concentrations of methanethiol, methanethiol, dimethyl sulfide and dimethyl disulfide in sulfur-containing odorous substances were detected using the standard "Determination of Hydrogen Sulfide, Methanethiol, Dimethyl Sulfide and Dimethyl Disulfide in Air Quality" (GB / T 14678-1993); the concentration of carbon disulfide in sulfur-containing odorous substances was detected using the standard "Determination of Carbon Disulfide in Air Quality - Diethylamine Spectrophotometric Method" (GB / T14680-1993).

[0062] Recycling steps:

[0063] To verify the material's cycling performance, regeneration was first performed as needed after each enrichment and removal cycle. The enriched material was loaded into a fixed tube, and a temperature control unit was used to gradually increase the temperature while continuously passing inert gas through it. This desorption and regeneration of the sulfur-containing odorous gas at 400–500°C took 2 hours. The regenerated enriched material was then loaded into an enrichment column, and cycling experiments were conducted following the same procedures as the enrichment and removal experiments. After five cycles, the enriched material still exhibited good performance.

[0064] Example 1:

[0065] Step (1):

[0066] The camellia oleifera shell biomass raw material was crushed and sieved to a particle size of less than or equal to 100 mesh. 10g of biomass powder was weighed and added to 100ml of 8% NaOH solution, then placed in a hydrothermal reactor and carbonized at 200℃ (hydrothermal pre-carbonization) for 15 hours. After washing with deionized water until neutral and drying, the charred material was obtained.

[0067] Step (2):

[0068] Take 4g of the above-mentioned carbon material and composite metal salt (total metal weight is 3g, including copper nitrate, iron nitrate and nickel nitrate in a weight ratio of 1:1:1) and disperse them in 100ml of deionized water. Then add 1g of ethylene glycol dispersant, heat and stir until viscous, dry, and then place in a tube furnace under nitrogen atmosphere and calcine at 700℃ for 2h. After washing with anhydrous ethanol and drying, a high-efficiency enrichment material is obtained.

[0069] The SEM, XRD, removal effect diagram, and cycle performance diagram of the obtained product are shown in the respective figures. Figures 1-4 .

[0070] Using the high-efficiency enrichment material obtained in Example 1, an enrichment and removal experiment of sulfur-containing odorous gases was conducted. Within 30 minutes, the enrichment and removal efficiency of methanethiol was 95%, that of dimethyl sulfide was 93%, that of dimethyl disulfide was 89%, and that of carbon disulfide was 91%. The enrichment and removal efficiency of all gases reached 100% after 4 hours.

[0071] Example 2:

[0072] Compared to Example 1, the only difference is the change in the alkaline treatment conditions, such as adjusting the concentration and type of alkaline solution, which are: (A) 5% alkaline solution concentration; (B) 10% alkaline solution concentration; (C) 8% NH3·H2O alkaline solution; (D) 8% KOH alkaline solution.

[0073] The enrichment and removal experiment of sulfur-containing odorous gases was carried out according to the method of Example 1. The effect data after 30 minutes is shown in Table 1:

[0074] Table 1. Enrichment Removal Effect

[0075]

[0076] Example 3:

[0077] Compared with Example 1, the only difference is that the hydrothermal pre-carbonization conditions are changed, such as adjusting the hydrothermal pre-carbonization temperature and time, which are: (A) the hydrothermal pre-carbonization temperature is 250°C; (B) the pre-carbonization time is 10h; (C) the pre-carbonization time is 17h; (D) the pre-carbonization time is 20h.

[0078] The results at 30 minutes are shown in Table 2:

[0079] Table 2. Enrichment Removal Effect

[0080]

[0081] Example 4:

[0082] Compared to Example 1, the only difference is that the conditions of the composite metal are changed, such as the metal ratio and metal type, as follows:

[0083] (A): The amount of composite metal is halved. For example, the weight ratio of carbon material to composite metal is 4:1.5.

[0084] (B): The amount of composite metals used is increased, for example, the weight ratio of carbon materials to composite metals is 4:4;

[0085] (C): The amount of composite metal remains the same, the difference is that the weight ratio of copper nitrate, iron nitrate and nickel nitrate is 1.5:0.7:0.8;

[0086] (D): The amount of composite metal remains the same, the difference is that the composition of the composite metal is copper nitrate: zinc nitrate: silver nitrate in a weight ratio of 1:1:1.

[0087] The results at 30 minutes are shown in Table 3:

[0088] Table 3. Enrichment Removal Effect

[0089]

[0090] Example 5:

[0091] Compared to Example 1, the only difference is that the carbonization conditions in step 2 are changed, such as adjusting the carbonization (calcination) temperature, which are: (A) calcination temperature of 500°C; (B) calcination temperature of 750°C; (C) calcination temperature of 900°C.

[0092] The results at 30 minutes are shown in Table 4:

[0093] Table 4. Enrichment Removal Effect

[0094]

[0095] Example 6:

[0096] The enriched material saturated in Example 1 was placed into a regeneration device for regeneration, and then an enrichment removal experiment was performed. This process was repeated five times, and the effect data after 30 minutes are shown in Table 5.

[0097] Table 5. Enrichment Removal Effect

[0098]

[0099] As shown in Table 5, the technical solution of the present invention can obtain highly efficient enrichment materials with good regeneration performance.

[0100] Example 7:

[0101] Compared with the example, the only difference is that the gas composition in the enrichment and removal experiment is changed: (A) the mixed gas is three organic gases: methanethiol, toluene and trimethylamine. After 30 minutes, the enrichment and removal efficiency of methanethiol is 100%, the enrichment and removal efficiency of toluene is 13%, and the enrichment and removal efficiency of trimethylamine is 24%.

[0102] Comparative Example 1:

[0103] Compared with Example 1, the only difference is that the hydrothermal pre-carbonization treatment in step (1) is omitted, and the relevant treatment in step (2) is carried out directly after alkaline treatment and drying. The enrichment and removal experiment of sulfur-containing odorous gases was conducted according to the method of Example 1. After 30 minutes, the enrichment and removal efficiency of methanethiol was 55%, that of dimethyl sulfide was 32%, that of dimethyl disulfide was 48%, and that of carbon disulfide was 37%.

[0104] Comparative Example 2:

[0105] Compared with Example 1, the only difference is that in step (1), 0.5M sulfuric acid is used instead of the sodium hydroxide solution. All other operations and parameters are the same as in Example 1. An enrichment and removal experiment of sulfur-containing odorous gases was conducted according to the method of Example 1. After 30 minutes, the enrichment and removal efficiency of methanethiol was 38%, that of dimethyl sulfide was 31%, that of dimethyl disulfide was 27%, and that of carbon disulfide was 19%.

[0106] Comparative Example 3:

[0107] Compared with Example 1, the only difference is that in step (1), the biomass was not combined with sodium hydroxide solution, but was directly placed in water for hydrothermal treatment. All other operations and parameters were the same as in Example 1. Following the method of Example 1, an enrichment and removal experiment of sulfur-containing odorous gases was conducted. After 30 minutes, the enrichment and removal efficiency of methanethiol was 41%, that of dimethyl sulfide was 34%, that of dimethyl disulfide was 28%, and that of carbon disulfide was 42%.

[0108] Comparative Example 4:

[0109] Compared with Example 1, the only difference is that a single metal source is used instead of the composite metal source, and the difference lies in step (2):

[0110] (A) Only copper nitrate is added, without ferric nitrate or nickel nitrate, and the ratio of copper nitrate to biomass is 3:4;

[0111] (B) Only ferric nitrate is added, without copper nitrate or nickel nitrate, and the ratio of ferric nitrate to biomass is 3:4;

[0112] (C) Only nickel nitrate is added, without copper nitrate or ferric nitrate, and the ratio of nickel nitrate to biomass is 3:4.

[0113] The results at 30 minutes are shown in Table 6:

[0114] Table 6. Enrichment Removal Effect

[0115]

[0116] Comparative Example 5:

[0117] Compared with Example 1, the only difference is the change in metal type. In step (2), the ratio of metal type and biochar is as follows:

[0118] (A) Copper nitrate: Aluminum nitrate: Magnesium nitrate: Carbon material = 1:1:1:4;

[0119] (B) Ferric nitrate: Aluminum nitrate: Magnesium nitrate: Carbon material = 1:1:1:4;

[0120] (C) Nickel nitrate: Aluminum nitrate: Magnesium nitrate: Carbon material = 1:1:1:4

[0121] The results at 30 minutes are shown in Table 7:

[0122] Table 7. Enrichment Removal Effect

[0123]

[0124]

[0125] In summary, the alkali-assisted solvothermal treatment, combined with the special combination of metals, can unexpectedly achieve synergy, significantly improving the adsorption performance of sulfur-containing odors. Moreover, it can also improve the adsorption selectivity of sulfur-containing odors, bringing unexpected results.

Claims

1. A method for producing a sulfur-containing malodorous gas enrichment material, characterized by, The solution containing the biomass raw material and the alkaline substance is subjected to a solvothermal treatment, and a carbon material is collected; The carbon material is compounded with a metal source, and subjected to a carbonization treatment, thereby obtaining the carbon material; The alkaline substance is at least one of hydroxides, carbonates, bicarbonates, and ammonia of alkali metals; the solvent in the solution is water or a mixed solvent of water and an organic solvent; the weight percentage concentration of the alkaline substance in the solution is 5% to 15%; the solvothermal temperature is 180 to 300℃; and the solvothermal time is 10 to 20 hours. The metal source contains a copper source, an iron source, and a nickel source, and the weight ratio of the copper source, the iron source, and the nickel source is 0.5 to 1.5: 0.5 to 1.5: 0.5 to 1.5; and the metal source is a water-soluble salt of each metal. The weight ratio of the metal source to the carbon material is 0.3 to 1:

1. The carbonization process is performed in a protective atmosphere. The carbonization temperature is 700 to 750℃. The sulfur-containing malodorous gas includes at least one of methyl mercaptan, methyl sulfide, and dimethyl disulfide.

2. The method for producing a sulfur-containing malodorous gas enrichment material according to claim 1, characterized by, The biomass is at least one of oil tea shell, chili straw, peanut shell, legume straw, and traditional Chinese medicine residue.

3. The method for producing a sulfur-containing malodorous gas enrichment material according to claim 1, characterized by, The weight percentage concentration of the alkaline substance in the solution is 8 to 10%.

4. The method for producing a sulfur-containing malodorous gas enrichment material according to claim 1, characterized by, The mass-volume concentration of the biomass raw material in the solution is 50 to 300 g / L.

5. The method for producing a sulfur-containing malodorous gas enrichment material according to claim 1, characterized by, The mass-volume concentration of the biomass raw material in the solution is 100 to 150 g / L.

6. The method for producing a sulfur-containing malodorous gas enrichment material according to claim 1, characterized by, The solvothermal temperature is 200 to 250℃.

7. The method for producing a sulfur-containing malodorous gas enrichment material according to claim 6, characterized by, The solvothermal temperature is 200 to 220℃.

8. The method for producing a sulfur-containing malodorous gas enrichment material according to Claim 1, characterized by, The solvothermal time is 14 to 17 hours.

9. The method for producing a sulfur-containing malodorous gas enrichment material according to Claim 1, characterized by, After the solvothermal treatment, the product is washed until the pH of the filtrate is 6.5 to 7.5, thereby obtaining the carbon material.

10. The method for producing a sulfur-containing malodorous gas enrichment material according to Claim 1, characterized by, The weight ratio of the copper source, the iron source, and the nickel source in the metal source is 1 to 1.5: 0.5 to 1: 0.5 to 1.

11. The method of producing a sulfur-containing malodorous gas enrichment material according to claim 1, characterized by, The metal source is at least one of a nitrate, a sulfate, and an acetate of each metal.

12. The method of producing a sulfur-containing malodorous gas enrichment material according to claim 1, characterized by, The weight ratio of the metal source to the carbon material is 0.7 to 1:

1.

13. The method of producing a sulfur-containing malodorous gas enrichment material according to claim 1, characterized by, The carbon material and the metal source are compounded by a liquid-phase compounding method. The liquid-phase compounding method includes the steps of mixing the carbon material in a metal source solution and then removing the solvent. A dispersant is further added to the metal source solution. The dispersant is at least one of ethylene glycol, isopropyl alcohol, isobutyl alcohol, and cyclohexanol. The weight ratio of the dispersant to the carbon material is 1: 1 to 10.

14. The method of producing a sulfur-containing malodorous gas enrichment material according to claim 1, characterized by, The carbonization time is 1 to 3 hours.

15. The method of producing a sulfur-containing malodorous gas enrichment material according to claim 1, characterized by, After the carbonization, the product is washed with an alcohol solvent, and then dried, thereby obtaining the sulfur-containing malodorous gas enrichment material.

16. The sulfur-containing malodorous gas enrichment material prepared by the preparation method of any one of claims 1 to 15.

17. Use of the sulfur-containing malodorous gas enrichment material produced by the production method according to any one of claims 1 to 15, characterized in that, The sulfur-containing malodorous gas includes at least one of methyl mercaptan, methyl sulfide, and dimethyl disulfide. The sulfur-containing malodorous gas enrichment material is used for adsorbing trace sulfur-containing malodorous gas.

18. The use of claim 17, wherein, The sulfur-containing malodorous gas enrichment material is used for selectively adsorbing the sulfur-containing malodorous gas from a mixed atmosphere containing the sulfur-containing malodorous gas and further containing at least one of a hydrocarbyl benzene and an alkyl amine. The trace amount of sulfur-containing malodorous gas has a content of sulfur-containing malodorous gas less than or equal to 100 mg / m 3 ; ​

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