Catalyst for treating industrial sulfur-containing waste gas as well as preparation method and application of catalyst

Abstract

The invention discloses a catalyst for treating industrial sulfur-containing waste gas as well as a preparation method and application thereof. The catalyst is used for solving the problem that a noble metal catalyst is easily poisoned and inactivated when the sulfur-containing waste gas is treated in a catalytic combustion mode. The catalyst is composed of a precious metal sulfur-resistant catalyst used for treating sulfur in waste gas at the front end and a catalytic combustion catalyst used for degrading pollutants at the rear end. The noble metal sulfur-resistant catalyst and the catalytic combustion catalyst are both composed of a noble metal active component and a carrier, the noble metal active component is a platinum and / or palladium soluble compound, and the noble metal sulfur-resistant catalyst carrier is silicon-doped alumina; a carrier of the catalytic combustion catalyst is rare earth modified aluminum oxide. According to the invention, a zoning and sectioning method is combined with the existing catalytic combustion catalyst, the sulfur-containing waste gas is treated, the service life of the catalyst during application is greatly prolonged, the sulfur-resistant catalyst can be integrated into the catalytic reaction tower more simply and conveniently, additional equipment does not need to be added, and the capital construction difficulty and cost are reduced.

Description

Technical Field

[0001] The invention relates to a catalyst for treating industrial sulfur-containing waste gas, a preparation method and application thereof. The catalyst is particularly suitable for treating industrial sulfur-containing waste gas. Background Art

[0002] Catalytic combustion is a purification method that oxidizes and decomposes combustible pollutants in exhaust gas into non-toxic and harmless substances such as water, carbon dioxide, and nitrogen at a lower temperature under the action of a catalyst. Since the catalyst accelerates the process of oxidation and decomposition, most organic compounds can be completely oxidized by the catalyst within the temperature range of 200-450°C. Compared with the thermal combustion method, catalytic combustion requires less auxiliary fuel, low energy consumption, and small equipment and facilities. The catalytic combustion process is carried out in a catalytic combustion device. The organic waste gas is first preheated to 200-400°C through a heat exchanger, and then enters the combustion chamber. When passing through the catalyst bed, the molecules of organic compounds and the oxygen molecules in the mixed gas are adsorbed on the surface of the catalyst and activated. Since the surface adsorption reduces the activation energy of the reaction, the organic compounds react rapidly with the oxygen molecules at a lower temperature to produce carbon dioxide and water. The key to the catalytic combustion reaction is to select a suitable catalyst. The catalyst is required to have high activity, especially good low-temperature activity, so that the reaction can be started at the lowest possible temperature. The combustion reaction is an exothermic reaction. The release of a large amount of heat can rapidly increase the surface temperature of the catalyst. However, the metal on the catalyst is easily reduced in activity due to melting and sintering, so the catalyst is required to be resistant to high temperatures.

[0003] At present, the catalysts for catalytic combustion of exhaust gas can be roughly divided into precious metal catalysts, non-precious metal oxide catalysts and mixed metal catalysts. Metal oxide catalysts are cheap and highly resistant to poisoning, but they are not durable and have low efficiency. As catalysts for treating industrial waste gas, precious metal catalysts have the advantage of high oxidation activity. Although they have the disadvantages of scarce resources, high prices and poor resistance to poisoning, they are still the main catalysts used by countries around the world. Catalysts loaded with precious metals are widely favored for their high efficiency, and their main carriers are ceramic or metal materials in the form of monolithic or honeycomb.

[0004] Due to its high activity and high stability, platinum catalysts are widely used in VOCs catalytic oxidation. Industrial applications are limited by high cost and easy poisoning, especially in the treatment of industrial waste gas containing chlorides, sulfides and other substances. In a high humidity environment, platinum catalysts are also easily deactivated due to water adsorption.

[0005] Compared with other precious metal catalysts, palladium catalysts have higher thermal stability. Usually, Pd is loaded on the surface of a porous carrier to improve the stability of the catalyst. Catalysts prepared with weakly acidic materials as carriers have the highest activity. Palladium-based catalysts are more active than other precious metal catalysts in oxidizing benzene, toluene, xylene and methane.

[0006] However, since sulfur and precious metals have a strong binding ability at high temperatures, the presence of sulfides in the exhaust gas will poison the catalyst and deactivate it, greatly affecting the catalyst activity. The performance of the catalyst often depends on factors such as the preparation method, precursor type, particle diameter, metal loading, VOC concentration, etc. In summary, when treating sulfide-containing exhaust gas, conventional catalysts and processes cannot be used. It is necessary to develop a new catalyst and a matching application process. Summary of the invention

[0007] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a catalyst for treating industrial sulfur-containing waste gas, a preparation method and its application. The present invention adopts a process for treating sulfur-containing waste gas in stages, that is, the sulfur component in the waste gas is treated by a desulfurization catalyst at the front end, and the desulfurized gas enters the catalytic combustion catalyst at the back end to complete the degradation of pollutants.

[0008] Specifically, the technical solution of the present invention is:

[0009] A catalyst for treating industrial sulfur-containing waste gas, comprising a noble metal anti-sulfur catalyst for treating sulfur components in waste gas at the front end and a catalytic combustion catalyst for pollutant degradation at the back end; the noble metal anti-sulfur catalyst comprises a noble metal active component and a carrier, the noble metal active component is one or more of platinum and palladium soluble compounds, and the carrier is silicon-doped alumina; the noble metal loading in the noble metal anti-sulfur catalyst is 0.5-1wt%, and the remainder is the carrier; SiO in the silicon-doped alumina 2 1~10wt%, the balance is Al 2 O 3 The catalytic combustion catalyst is composed of a noble metal active component and a carrier, wherein the noble metal active component is one or more of platinum and palladium soluble compounds, and the carrier is rare earth modified alumina; the noble metal loading in the noble metal sulfur-resistant catalyst is 0.5-1wt%, and the balance is the carrier; the rare earth oxide in the rare earth oxide doped alumina accounts for 10-25wt%, and the balance is Al 2 O 3 .

[0010] Furthermore, the platinum or palladium soluble compound is platinum nitrate or palladium nitrate.

[0011] Furthermore, the precious metal loading in the precious metal sulfur-resistant catalyst is 0.5-1wt%, and the remainder is the carrier;2 1~10wt%, the balance is Al 2 O 3 The precious metal loading in the precious metal anti-sulfur catalyst is 0.5-1wt%, and the balance is the carrier; the rare earth oxide in the rare earth oxide doped alumina accounts for 10-25wt%, and the balance is Al 2 O 3 .

[0012] A method for preparing a catalyst for treating industrial sulfur-containing waste gas, comprising:

[0013] (1) Preparation of the Noble Metal Sulfur-Resistant Catalyst

[0014] Take a certain amount of tetraethyl orthosilicate and mix it with anhydrous ethanol, add concentrated sulfuric acid to adjust the pH to 1-2, and stir for 2 hours until it is completely hydrolyzed; dissolve a certain amount of polyvinyl pyrrolidone and sodium aluminate in water and stir for 30 minutes; mix and stir the above two solutions, and drop the precious metal solution therein, stir for 2 hours, adjust the pH to 10 with 2 mol / L sodium hydroxide solution, stir for 1 hour and transfer to a hydrothermal kettle, place the hydrothermal kettle in an oven, and hydrothermally crystallize at 180°C for 24 hours; wash the obtained catalyst powder with deionized water until it is neutral, add a binder after drying, and calcine at 600°C for 2 hours after forming with an extruder to obtain a precious metal sulfur-resistant catalyst.

[0015] (2) Preparation of the Catalytic Combustion Catalyst

[0016] One or more platinum or palladium compound solutions are slowly added dropwise to the aluminum oxide or rare earth oxide powder dispersed in water, and stirred for 2 hours. The platinum and palladium compounds used are one or more of platinum nitrate and palladium nitrate. After the addition is completed, the pH of the solution is adjusted to 7-9 with barium hydroxide or ammonia water. The resulting slurry is dried and roasted at 600°C for 2 hours to obtain a precious metal coating material. The precious metal coating material, adhesive, acetic acid, water, etc. are dispersed in a colloid mill, the slurry viscosity is adjusted, and the coating is completed at both ends of the honeycomb carrier by vacuum coating. The catalyst is obtained after drying and roasting.

[0017] Furthermore, in the preparation of the noble metal sulfur-resistant catalyst, a high-temperature hydrothermal method is used to prepare catalyst powder, wherein the template agent is polyvinyl pyrrolidone K30, and the catalyst is obtained through a molding process.

[0018] Furthermore, the binder used in the preparation of the catalytic combustion catalyst is aluminum gel or silica gel, and the amount thereof is 10-25% of the mass of the catalyst powder.

[0019] Furthermore, in the preparation of the catalytic combustion catalyst, hydroxyethyl cellulose is used to adjust the slurry viscosity, and the amount of hydroxyethyl cellulose used is 3-10% of the mass of the liquid.

[0020] The application of the catalyst for treating industrial sulfur-containing waste gas of the present invention adopts a process of treating sulfur-containing waste gas in stages, that is, the sulfur component in the waste gas is treated by a desulfurization catalyst at the front end, and the desulfurized gas enters the catalytic combustion catalyst at the rear end to complete the degradation of pollutants. The catalyst is loaded into the reactor in stages, with the front end being a noble metal desulfurization catalyst and the rear end being a catalytic combustion catalyst; the sulfide in the industrial sulfur-containing waste gas is less than or equal to 100 ppm.

[0021] Compared with the prior art, the beneficial effects of the present invention include:

[0022] The present invention effectively solves the problem of catalyst preparation and application process for treating industrial sulfur-containing waste gas by catalytic combustion, greatly improves the service life of precious metal catalysts, and effectively reduces the use cost of catalysts. The desulfurization catalyst can be easily integrated into the catalytic reaction tower without adding additional equipment, reducing the difficulty and cost of infrastructure construction. DETAILED DESCRIPTION

[0023] Example 1

[0024] 1. Preparation of precious metal desulfurization catalyst

[0025] Take 34.66g of tetraethyl orthosilicate and mix it with 100g of anhydrous ethanol, add concentrated sulfuric acid to adjust the pH to 1-2, and stir for 2h until it is completely hydrolyzed; take 5g of polyvinyl pyrrolidone and 72.35g of sodium aluminate and dissolve them in water, and stir for 30min; mix and stir the above two solutions, and add palladium nitrate solution containing 1g of palladium dropwise thereto, stir for 2h, adjust the pH to 10 with 2mol / L sodium hydroxide solution, stir for 1h, transfer to a hydrothermal kettle, place the hydrothermal kettle in an oven, and hydrothermally crystallize at 180°C for 24h; the obtained catalyst powder is washed with deionized water until it is neutral, dried, added with a binder, formed by an extruder, and calcined at 600°C for 2h to obtain a precious metal sulfur-resistant catalyst.

[0026] 2. Preparation of Catalytic Combustion Catalyst

[0027] (1) Weigh 2.4 g of platinum nitrate solution with a Pt mass, dilute it with water, and slowly add it dropwise to 200 g of rare earth modified alumina powder dispersed in water while stirring. After the addition is completed, adjust the pH of the solution to 6-8 with barium hydroxide. After hydrolysis for 2 hours, dry it and calcine it at 600°C for 2 hours to obtain a precious metal Pt coating material.

[0028] (2) Weigh 4 g of palladium nitrate solution with a Pd mass, dilute it with water, and slowly add it dropwise to 200 g of rare earth modified alumina powder dispersed in water while stirring. After the addition is completed, adjust the pH of the solution to 6-8 with barium hydroxide, hydrolyze for 2 hours, dry it, and calcine it in air for 2 hours to obtain the precious metal Pd coating material.

[0029] (3) Weigh 120 g of precious metal Pt coating material, 180 g of precious metal Pd coating material, aluminum gel, acetic acid, water, etc., disperse them in a colloid mill, adjust the viscosity of the slurry, and use vacuum coating to complete the coating on both ends of the honeycomb carrier. After drying and calcining, the catalyst is obtained.

[0030] 3. Catalyst evaluation

[0031] The catalyst is loaded into the reactor in sections, with the front end being the noble metal desulfurization catalyst and the rear end being the catalytic combustion catalyst. According to the experimental requirements, the reaction gas is introduced, and the reaction temperature is set to start the experiment. The reaction temperature is 350-500°C, and the test gradient is 50°C; carbon monoxide: 4000±10ppm, methane: 1000±10ppm, propane: 1000±10ppm; oxygen: 5%; water: 0-20%; sulfide: 50ppm.

[0032] The experimental results are as follows:

[0033]

[0034]

[0035] It can be seen from the data in the table that carbon monoxide can react completely under the above-mentioned temperature and water content conditions. When the temperature is greater than 500°C, the conversion rate of methane at various water contents is greater than 80%. When the temperature is greater than 450°C, the conversion rate of propane at various water contents is greater than 90%. The conversion rates all meet the design requirements.

[0036] Comparative Example 1

[0037] The catalytic combustion catalyst is loaded into the reactor, and the noble metal desulfurization catalyst at the front end is removed. According to the experimental requirements, the reaction gas is introduced, and the reaction temperature is set to start the experiment. The reaction temperature is 350-500°C, and the test gradient is 50°C; carbon monoxide: 4000±10ppm, methane: 1000±10ppm, propane: 1000±10ppm; oxygen: 5%; water: 0-20%; sulfide: 50ppm.

[0038] The experimental results are as follows:

[0039]

[0040]

[0041] By comparing Example 1 and Comparative Example 1, it can be seen that with the same catalyst formulation, only the removal of the front-end precious metal desulfurization catalyst does not significantly reduce the carbon monoxide conversion rate, but the conversion rates of methane and propane both decrease.

[0042] Example 2

[0043] 1. Preparation of precious metal desulfurization catalyst

[0044] 34.66g of tetraethyl orthosilicate was mixed with 100g of anhydrous ethanol, concentrated sulfuric acid was added to adjust the pH to 1-2, and the mixture was stirred for 2h until it was completely hydrolyzed; 5g of polyvinyl pyrrolidone and 72.35g of sodium aluminate were dissolved in water and stirred for 30min; the above two solutions were mixed and stirred, and palladium nitrate solution containing 2g of palladium was added dropwise thereto, and after stirring for 2h, the pH was adjusted to 10 with 2mol / L sodium hydroxide solution, and after stirring for 1h, the mixture was transferred to a hydrothermal kettle, and the hydrothermal kettle was placed in an oven for hydrothermal crystallization at 180°C for 24h; the obtained catalyst powder was washed with deionized water until it was neutral, and a binder was added after drying. After being formed by an extruder, the mixture was calcined at 600°C for 2h to obtain a precious metal sulfur-resistant catalyst.

[0045] 2. Preparation of Catalytic Combustion Catalyst

[0046] (1) Weigh 4 g of platinum nitrate solution with a Pt mass, dilute it with water, and slowly add it dropwise to 200 g of rare earth modified alumina powder dispersed in water while stirring. After the addition is completed, adjust the pH of the solution to 7 with acetic acid, hydrolyze for 2 hours, dry it, and calcine it at 600°C for 1 hour to obtain the precious metal Pt coating material.

[0047] (2) Weigh 4 g of palladium nitrate solution with a Pd mass, dilute it with water, and slowly add it dropwise to 200 g of rare earth modified alumina powder dispersed in water while stirring. After the addition is completed, adjust the pH of the solution to 7-9 with barium hydroxide, hydrolyze for 2 hours, dry it, and calcine it in air for 2 hours to obtain the precious metal Pd coating material.

[0048] (3) Weigh 120 g of precious metal Pt coating material, 180 g of precious metal Pd coating material, aluminum gel, acetic acid, water, etc., disperse them in a colloid mill, adjust the viscosity of the slurry, and use vacuum coating to complete the coating on both ends of the honeycomb carrier. After drying and calcining, the catalyst is obtained.

[0049] 3. Catalyst evaluation

[0050] The catalyst is loaded into the reactor in sections, with the front end being the noble metal desulfurization catalyst and the rear end being the catalytic combustion catalyst. According to the experimental requirements, the reaction gas is introduced, and the reaction temperature is set to start the experiment. The reaction temperature is 350-500°C, and the test gradient is 50°C; carbon monoxide: 4000±10ppm, methane: 1000±10ppm, propane: 1000±10ppm; oxygen: 5%; water: 0-20%; sulfide: 50ppm.

[0051] The experimental results are as follows:

[0052]

[0053] It can be seen from the values ​​in the table that, compared with Example 1, the increase in the precious metal content is beneficial to the conversion of alkanes, and the conversion rate thereof is improved.

[0054] Comparative Example 2

[0055] The catalytic combustion catalyst is loaded into the reactor, and the noble metal desulfurization catalyst at the front end is removed. According to the experimental requirements, the reaction gas is introduced, and the reaction temperature is set to start the experiment. The reaction temperature is 350-500°C, and the test gradient is 50°C; carbon monoxide: 4000±10ppm, methane: 1000±10ppm, propane: 1000±10ppm; oxygen: 5%; water: 0-20%; sulfide: 50ppm.

[0056] The experimental results are as follows:

[0057]

[0058] It can be seen from the values ​​in the table that, compared with Example 2, after the introduction of sulfur, the conversion rates of methane and propane decreased significantly, and the higher the noble metal content, the more obvious the decrease.

[0059] Example 3

[0060] 1. Preparation of precious metal desulfurization catalyst

[0061] Take 26.01g of tetraethyl orthosilicate and mix it with 100g of anhydrous ethanol, add concentrated sulfuric acid to adjust the pH to 1-2, and stir for 2h until it is completely hydrolyzed; take 5g of polyvinyl pyrrolidone and 74.36g of sodium aluminate and dissolve them in water, and stir for 30min; mix and stir the above two solutions, and add palladium nitrate solution containing 1g of palladium thereto dropwise, stir for 2h, adjust the pH to 10 with 2mol / L sodium hydroxide solution, stir for 1h, transfer to a hydrothermal kettle, place the hydrothermal kettle in an oven, and hydrothermally crystallize at 180°C for 24h; the obtained catalyst powder is washed with deionized water until it is neutral, dried, added with a binder, formed by an extruder, and calcined at 600°C for 2h to obtain a precious metal sulfur-resistant catalyst.

[0062] 2. Preparation of Catalytic Combustion Catalyst

[0063] (1) Weigh 2.4 g of platinum nitrate solution with a Pt mass, dilute it with water, and slowly add it dropwise to 200 g of rare earth modified alumina powder dispersed in water while stirring. After the addition is completed, adjust the pH of the solution to 6-8 with barium hydroxide. After hydrolysis for 2 hours, dry it, and calcine it at 600°C for 2 hours to obtain a precious metal Pt coating material.

[0064] (2) Weigh 4 g of palladium nitrate solution with a Pd mass, dilute it with water, and slowly add it dropwise to 200 g of rare earth modified alumina powder dispersed in water while stirring. After the addition is completed, adjust the pH of the solution to 6-8 with barium hydroxide, hydrolyze for 2 hours, dry it, and calcine it in air for 2 hours to obtain the precious metal Pd coating material.

[0065] (3) Weigh 150 g of precious metal Pt coating material, 150 g of precious metal Pd coating material, aluminum gel, acetic acid, water, etc., disperse them in a colloid mill, adjust the viscosity of the slurry, and use vacuum coating to complete the coating on both ends of the honeycomb carrier. After drying and calcining, the catalyst is obtained.

[0066] 3. Catalyst evaluation

[0067] The catalyst is loaded into the reactor in sections, with the front end being the noble metal desulfurization catalyst and the rear end being the catalytic combustion catalyst. According to the experimental requirements, the reaction gas is introduced, and the reaction temperature is set to start the experiment, reaction temperature: 350-500°C, test gradient: 50°C; carbon monoxide: 4000±10ppm, methane: 1000±10ppm, propane: 1000±10ppm; oxygen: 5%; water: 0-20%; sulfide: 100ppm.

[0068] The experimental results are as follows:

[0069]

[0070]

[0071] The catalyst powder used in this embodiment is the same as that used in Example 1, except that the Pd loading and the sulfide concentration are increased. From the values ​​in the table, it can be seen that increasing the Pd loading can effectively solve the negative impact of increasing the sulfur concentration, and the conversion rates of methane and propane have not decreased significantly.

[0072] Comparative Example 3

[0073] The catalytic combustion catalyst is loaded into the reactor, and the noble metal desulfurization catalyst at the front end is removed. According to the experimental requirements, the reaction gas is introduced, and the reaction temperature is set to start the experiment. The reaction temperature is 350-500°C, and the test gradient is 50°C; carbon monoxide: 4000±10ppm, methane: 1000±10ppm, propane: 1000±10ppm; oxygen: 5%; water: 0-20%; sulfide: 100ppm.

[0074]

[0075]

[0076] From the values ​​in the table, it can be seen that, compared with Example 3, after the amount of sulfur introduced increases, the conversion rates of methane and propane decrease more significantly than that of Comparative Example 1, indicating that the catalyst is easily deactivated when there is no desulfurization section protection, and also indicating that Pd is more easily poisoned than Pt in an environment where sulfur exists.

Claims

1. A catalyst for treating industrial sulfur-containing waste gas, characterized in that: The catalyst is composed of a noble metal anti-sulfur catalyst for treating sulfur components in exhaust gas at the front end and a catalytic combustion catalyst for pollutant degradation at the back end; The noble metal anti-sulfur catalyst is composed of a noble metal active component and a carrier, wherein the noble metal active component is one or more of platinum and palladium soluble compounds, and the carrier is silicon-doped alumina; the noble metal loading in the noble metal anti-sulfur catalyst is 0.5-1wt%, and the balance is the carrier; SiO2 in the silicon-doped alumina accounts for 1-10wt%, and the balance is Al2O3; The catalytic combustion catalyst is composed of a precious metal active component and a carrier, wherein the precious metal active component is one or more of platinum and palladium soluble compounds, and the carrier is rare earth modified alumina; the precious metal loading in the precious metal sulfur-resistant catalyst is 0.5-1wt%, and the balance is the carrier; the rare earth oxide in the rare earth oxide-doped alumina accounts for 10-25wt%, and the balance is Al2O3.

2. The catalyst for treating industrial sulfur-containing waste gas according to claim 1, characterized in that: The platinum and palladium soluble compounds are platinum nitrate or palladium nitrate.

3. The catalyst for treating industrial sulfur-containing waste gas according to claim 1, characterized in that: The noble metal loading in the noble metal sulfur-resistant catalyst is 0.5-1 wt %, and the remainder is the carrier; The silicon-doped alumina contains 1-10 wt% SiO2 and the remainder is Al2O3; The noble metal loading in the noble metal sulfur-resistant catalyst is 0.5-1 wt %, and the remainder is the carrier; The rare earth oxide doped alumina contains 10-25 wt% of rare earth oxide, and the remainder is Al2O3.

4. A method for preparing a catalyst for treating industrial sulfur-containing waste gas according to any one of claims 1 to 3, characterized in that: The preparation of the noble metal sulfur-resistant catalyst comprises: Take a certain amount of tetraethyl orthosilicate and mix it with anhydrous ethanol, add concentrated sulfuric acid to adjust the pH to 1-2, and stir for 2 hours until it is completely hydrolyzed; dissolve a certain amount of polyvinyl pyrrolidone and sodium aluminate in water and stir for 30 minutes; mix and stir the above two solutions, and drop the precious metal solution therein, stir for 2 hours, adjust the pH to 10 with 2 mol / L sodium hydroxide solution, stir for 1 hour and transfer to a hydrothermal kettle, place the hydrothermal kettle in an oven, and hydrothermally crystallize at 180°C for 24 hours; wash the obtained catalyst powder with deionized water until it is neutral, add a binder after drying, and calcine at 600°C for 2 hours after forming with an extruder to obtain a precious metal sulfur-resistant catalyst.

5. A method for preparing a catalyst for treating industrial sulfur-containing waste gas according to any one of claims 1 to 3, characterized in that: The preparation of the catalytic combustion catalyst comprises: One or more platinum or palladium compound solutions are slowly added dropwise to aluminum oxide or rare earth oxide powder dispersed in water, and stirred for 2 hours. The platinum and palladium compounds used are one or more of platinum nitrate and palladium nitrate. After the addition is completed, the pH of the solution is adjusted to 7-9 with barium hydroxide or ammonia water. The obtained slurry is dried and calcined at 600°C for 2 hours to obtain a precious metal coating material. The precious metal coating material, adhesive, acetic acid and water are dispersed in a colloid mill, the slurry viscosity is adjusted, and the coating is completed at both ends of the honeycomb carrier by vacuum coating. The catalyst is obtained after drying and calcining.

6. The method for preparing a catalyst for treating industrial sulfur-containing waste gas according to claim 4, characterized in that: In the preparation of the noble metal sulfur-resistant catalyst, a high-temperature hydrothermal method is used to prepare catalyst powder, wherein the template agent is polyvinyl pyrrolidone K30, and the catalyst is obtained through a molding process.

7. The method for preparing a catalyst for treating industrial sulfur-containing waste gas according to claim 5, characterized in that: The adhesive used in the preparation of the catalytic combustion catalyst is aluminum glue or silica gel, and the amount thereof is 10-25% of the mass of the catalyst powder.

8. The method for preparing a catalyst for treating industrial sulfur-containing waste gas by catalytic combustion according to claim 5, characterized in that: In the preparation of the catalytic combustion catalyst, hydroxyethyl cellulose is used to adjust the slurry viscosity, and the amount of hydroxyethyl cellulose used is 3-10% of the liquid mass.

9. An application of a catalyst for treating industrial sulfur-containing waste gas according to any one of claims 1 to 3, characterized in that: The process of treating sulfur-containing exhaust gas in stages is adopted, that is, the sulfur component in the exhaust gas is treated by a desulfurization catalyst at the front end, and the desulfurized gas enters the catalytic combustion catalyst at the back end to complete the degradation of pollutants.

10. The use according to claim 9, characterized in that: The catalyst is loaded into the reactor in sections, with the front end being a noble metal desulfurization catalyst and the rear end being a catalytic combustion catalyst; the sulfide content in the industrial sulfur-containing waste gas is ≤100ppm.

Images