Sulfur-resistant chlorine-resistant VOCs (volatile organic compounds) and PM2.5 (particulate matter 2.5) synergistic purification multifunctional filter material and preparation method thereof

Abstract

The invention discloses a sulfur-resistant and chlorine-resistant VOCs and PM2.5 synergistic purification multifunctional filter material and a preparation method thereof. The sulfur-resistant and chlorine-resistant VOCs and PM2.5 synergistic purification multifunctional filter material comprises a sulfur-resistant and chlorine-resistant functional membrane and a catalytic filter material which are in composite connection, the catalytic filter material comprises filter material base cloth and an enrichment-catalysis bifunctional catalytic interface wrapping the surface of the filter material base cloth; the enrichment-catalysis bifunctional catalytic interface comprises a shell and an inner core, the shell is a Si-Al-Rb-Ox composite oxide, and the inner core is a Pt-Pd-Ce-Ti-Mn-Ox composite oxide. The multifunctional filter material prepared by the invention has the characteristics of low-temperature efficient catalytic oxidation of VOCs and sulfur-resistant and chlorine-resistant effects, plays a role in removing VOCs and PM2.5 at the same time, and has relatively long service life.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of air pollution treatment and functional filter material, and particularly relates to a sulfur-resistant and chlorine-resistant VOCs and PM 2.5 co-purification multifunctional filter material and a preparation method thereof. BACKGROUND

[0002] VOCs and PM 2.5 are important pollutants emitted from coal-fired flue gas. At present, the control of VOCs and PM 2.5 from flue gas is mostly carried out in steps. Most of the known co-control technologies are still the series connection type flue gas pollutant treatment combining dust removal and VOCs control, and when designing the above-mentioned equipment, the potential VOCs co-effect is not considered much, so the series connection type flue gas purification equipment is not ideal for VOCs treatment, and the VOCs co-effect of each purification link needs to be further verified. In addition, the existing VOCs purification materials still have problems such as poor sulfur resistance, chlorine resistance and stability. SUMMARY

[0003] The application aims to overcome the deficiencies in the prior art and provide a sulfur-resistant and chlorine-resistant VOCs and PM 2.5 co-purification multifunctional filter material and a preparation method thereof. The prepared multifunctional filter material has the characteristics of low-temperature high-efficiency catalytic oxidation of VOCs and the effects of sulfur resistance and chlorine resistance, plays a role in simultaneously removing VOCs and PM 2.5 , and has a long service life.

[0004] The application provides the following technical scheme: In a first aspect, a sulfur-resistant and chlorine-resistant VOCs and PM 2.5 co-purification multifunctional filter material is provided, which comprises a sulfur-resistant and chlorine-resistant functional film and a catalytic filter material connected in a composite manner; the catalytic filter material comprises a filter material base cloth and a rich-catalysis dual-function catalytic interface wrapped on the surface of the filter material base cloth. The rich-catalysis dual-function catalytic interface comprises an outer shell and a core, the outer shell is a Si-Al-Rb-O x composite oxide, wherein the molar ratio of Si, Al and Rb is 1:(1-5):(1-5); and the core is a Pt-Pd-Ce-Ti-Mn-O x composite oxide, wherein the molar ratio of Pt, Pd, Ce, Ti and Mn is 1:(0-1):(8-10):(0-5):(0-10).

[0005] Further, the mass of the shell is 20-30% of the mass of the filter material base cloth, and the mass of the core is 15-20% of the mass of the filter material base cloth. By limiting the mass of the shell and the core, the thickness of the generated shell is moderate, and the oxide is uniformly distributed; at the same time, the core oxide is uniformly distributed, and agglomeration is avoided.

[0006] Further, the blank of the sulfur-resistant and chlorine-resistant functional film comprises the following components in mass percentage: sulfur-resistant and chlorine-resistant catalytic powder 10-30%; polytetrafluoroethylene powder 48-73%; diffusing agent 3-10%; pore-forming agent 10-25%; coupling agent 4-10%.

[0007] Further, the sulfur-resistant and chlorine-resistant catalytic powder is Ti-Al-Co-O x The complex oxide is an active component, wherein the molar mass ratio of Ti, Al, and Co is 1:(1-3):(1-2); And / or, the diffusing agent is selected from one or more of fatty alcohol polyoxyethylene ether and sodium dinaphthylmethane disulfonate; And / or, the pore-forming agent is ethylene glycol or polyethylene glycol; And / or, the coupling agent is selected from one of vinyltri(β-methoxyethoxy)silane, N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, and γ-aminopropylmethyldiethoxysilane.

[0008] In a second aspect, a sulfur-resistant and chlorine-resistant VOCs and PM 2.5 The preparation method of the multifunctional filter material for synergistic purification of sulfur-resistant and chlorine-resistant VOCs and PM Dissolve platinum salt, palladium salt, cerium salt, titanium salt, and manganese salt in deionized water according to the proportion, then add ethylene glycol, stir until completely dissolved, and obtain a liquid; Dissolve silicon salt, aluminum salt, and rubidium salt in deionized water according to the proportion, stir until completely dissolved, and obtain b liquid; After pretreatment, the filter material base cloth is immersed in a liquid, ultrasonic stirring is performed, then potassium permanganate solution is poured into the filter material base cloth-containing a liquid, stirring is performed, then the filter material base cloth and the a liquid are simultaneously moved into a reaction kettle, the reaction kettle is fixed in a homogeneous reactor, heating reaction is performed, then a curing agent is added for curing, and then the filter material base cloth loaded with a catalytically active component is taken out, washed, and dried; After drying, the filter material base cloth loaded with a catalytically active component is immersed in b liquid, placed in a reactor for hydrothermal synthesis, then a curing agent is added for curing, the filter material base cloth is taken out after cooling to room temperature, washed, and dried to obtain a catalytic filter material; The anti-sulfur and anti-chlorine functional film and the catalytic filter material are hot-pressed by a hot-pressing roller to obtain the anti-sulfur and anti-chlorine VOCs and PM 2.5 The synergistic purification multifunctional filter material.

[0009] Further, the preparation method of the a liquid comprises: weighing platinum salt, palladium salt, cerium salt, titanium salt and manganese salt according to the proportion, dissolving them in deionized water, then adding ethylene glycol, and magnetically stirring at a speed of 100-500 r / min for 50-120 min at 20-60 ℃ until completely dissolved. The preparation method of the b liquid comprises: mixing silicon salt, aluminum salt and rubidium salt with deionized water, wherein the mass ratio of the total mass of silicon salt, aluminum salt and rubidium salt to the mass of deionized water is 1:(10-50), and stirring at a speed of 100-500 r / min for 50-120 min at 20-60 ℃ until completely dissolved.

[0010] Further, the specific preparation method of the catalytic filter material comprises: Mixing potassium permanganate and deionized water at a mass ratio of 1:(20-40), and magnetically stirring at a speed of 100-500 r / min for 30-60 min to obtain a potassium permanganate solution; After the pretreated filter base cloth is immersed in the a liquid and ultrasonically stirred for 20-40 min, the potassium permanganate solution is poured into the a liquid containing the filter base cloth, and stirred for 5-15 min. Then, the filter base cloth and the a liquid are simultaneously moved into a reaction kettle with a Teflon lining, and the reaction kettle is fixed in a homogeneous reactor. The speed is 100 r / min, the temperature is 80-100 ℃, the heating reaction is carried out for 2-3 h, polyvinyl alcohol curing agent is added for curing, and then cooled to room temperature. The filter base cloth loaded with the catalytically active component is taken out, washed with anhydrous ethanol for 2 times, washed with deionized water for 2 times, and then placed in a forced air drying oven at 60-100 ℃ for drying for 3 h. Then, the temperature is increased to 180-200 ℃ for baking for 4 h for drying. The filter base cloth loaded with the catalytically active component after drying is immersed in the b liquid, placed in a reactor, and subjected to hydrothermal synthesis at 100-200 ℃. Then, polyvinyl alcohol curing agent is added for curing. After cooling to room temperature, the filter base cloth is taken out, washed with anhydrous ethanol for 2 times, washed with deionized water for 2 times, and then placed in a forced air drying oven at 60-100 ℃ for drying for 3 h. Then, the temperature is increased to 180-200 ℃ for baking for 4 h for drying, to obtain the catalytic filter material.

[0011] Further, the filter base cloth is one of fluorine Meisi filter, P84 filter, PE filter and glass fiber filter.

[0012] Further, the pretreatment method of the filter base cloth comprises: immersing the filter base cloth in a treating agent for 2-6 min, and then drying at 100-200 ℃ for 5-10 min, to complete the pretreatment of the filter base cloth.

[0013] Further, the processing agent is selected from a mixed solution of polytetrafluoroethylene emulsion and polybutyl acrylate with a concentration of 5-10%, wherein the mass percentage concentration of the polybutyl acrylate emulsion is 10-15%.

[0014] Further, the preparation method of the anti-sulfur and anti-chlorine functional film comprises: The soluble titanium salt, aluminum salt and cobalt salt are weighed and mixed with deionized water, wherein the mass ratio of the total mass of the titanium salt, aluminum salt and cobalt salt to the mass of the deionized water is 1:(10-15); then the mixture is magnetically stirred at a speed of 400-600 r / min at 50-80℃ for 30-90 min to completely dissolve the salts; then 0.3-1.5 mol / L Na2CO3 solution is added and mixed at a speed of 400-600 r / min at 20-80℃ to obtain a precipitate; the precipitate in the precipitate solution is suction filtered and washed; then the precipitate is dried in an oven at 50-100℃ for 4-8 h, and then the precipitate is calcined in a muffle furnace at 300-950℃ for 4-12 h to obtain an anti-sulfur and anti-chlorine catalytic powder; The polytetrafluoroethylene powder, anti-sulfur and anti-chlorine catalytic powder, diffusing agent, coupling agent and pore-forming agent are weighed according to the proportion, and then put into a stirrer for mixing and stirring at a speed of 100-1000 r / min for 60-600 min; after taking out, the mixture is placed at rest at 60-80℃ for 24-48 h to obtain a blank of the anti-sulfur and anti-chlorine functional film; The blank of the anti-sulfur and anti-chlorine functional film is extruded into a strip-shaped preform through a pre-extrusion step, and then the preform is calendered at a temperature of 150-300℃, a pressure of 5-8 MPa and a processing speed of 0.5-1.5 m / min; finally, the preform is stretched, the stretching conditions are that the longitudinal stretching multiple is 2-5 times and the stretching temperature is 90-200℃, the thickness of the film is controlled to be 200-500 nm, the pore size is 60-100 nm, and the anti-sulfur and anti-chlorine functional film is formed by biaxial stretching of the preform in the first direction and the second direction perpendicular to the first direction.

[0015] Further, the silicon salt is selected from sodium silicate, the aluminum salt is selected from aluminum sulfate, and the rubidium salt is selected from rubidium chloride or rubidium nitrate; The platinum salt is selected from tetraammine platinum nitrate, the palladium salt is selected from tetraammine palladium nitrate, the cerium salt is selected from cerium nitrate or cerium sulfate, the titanium salt is selected from titanium sulfate, and the manganese salt is selected from manganese sulfate monohydrate; The cobalt salt is selected from cobalt nitrate or cobalt chloride.

[0016] Further, the hot-pressing composite conditions include a temperature of 100-240℃, a pressure of 1-5 MPa, and a processing speed on the hot-pressing roller of 2-5 m / min.

[0017] Compared with the prior art, the beneficial effects of the present invention are: (1) The sulfur- and chlorine-resistant VOCs and PM2.5 provided by this invention 2.5 In the synergistic purification multifunctional filter media, the catalytic filter media includes an enrichment-catalysis dual-function catalytic interface wrapped on the surface of the filter media base fabric. The enrichment-catalysis dual-function catalytic interface includes an outer shell and a core, with the core being Pt-Pd-Ce-Ti-Mn-O. x The composite oxide, prepared through processes such as baking, forms a porous structure that can enrich VOCs in flue gas. As it is the main active material of the catalyst, it exhibits a "enrichment-catalysis" effect on VOCs, enabling highly efficient VOCs filtration. The outer shell is Si-Al-Rb-O. x Composite oxides can further prevent the escape of SO2 and Cl. - It enters the core, protecting the core catalyst to maintain its effective and long-lasting catalytic performance; (2) The sulfur- and chlorine-resistant VOCs and PM provided by this invention 2.5 In the synergistic purification multifunctional filter media, the Si-Al-Rb-O shell is specifically defined. x In the composite oxide, the molar ratio of Si, Al, and Rb is 1:(1-5):(1-5); the core is Pt-Pd-Ce-Ti-Mn-O. x In the composite oxide, the molar ratio of Pt, Pd, Ce, Ti, and Mn is 1:(0-1):(8-10):(0-5):(0-10). By limiting the molar ratio of the elements in the shell and the core, the shell thickness can be moderate and the oxide distribution can be uniform. At the same time, the core oxide is uniformly distributed, avoiding agglomeration. (3) The sulfur- and chlorine-resistant VOCs and PM provided by this invention 2.5 Synergistic purification multifunctional filter media includes sulfur- and chlorine-resistant membranes, whose active components are Ti-Al-Co-O. x The composite oxide has Ti-Al-Co hydrophobic and sulfur-repellent sites, which can effectively isolate the deposition and poisoning effects of H2O and SO2 pairs and generated sulfates on the catalyst, solving the problem of catalyst poisoning during VOCs catalytic oxidation and extending the service life of the multifunctional filter material. (4) Using the sulfur- and chlorine-resistant VOCs and PM provided by this invention 2.5 After a period of time, due to effects such as sieving, collision, retention, diffusion, and electrostatic discharge, a layer of dust will accumulate on the surface of the multifunctional filter media. This dust layer is called the "initial layer." When the mixed flue gas passes through the multifunctional filter media, the PM in the flue gas... 2.5The dust particles are first filtered and intercepted by the "primary layer" and the sulfur-resistant functional membrane, and then contact the catalyst for VOCs filtration, so that the poisoning and abrasion of the catalyst by the dust can be reduced, the stability of the multifunctional filter material is improved, and the service life of the multifunctional filter material is prolonged; in addition, the multifunctional filter material can simultaneously remove VOCs and PM 2.5 without increasing the VOCs removal equipment, so that the flue gas treatment cost is greatly reduced; (5) The sulfur-resistant and chlorine-resistant VOCs and PM 2.5 purification multifunctional filter material provided by the application can remove PM 2.5 at a rate of >99% and remove VOCs at an efficiency of >80%, the multifunctional filter material is suitable for bag dust removal working conditions, has the characteristics of low-temperature and high-efficiency catalytic oxidation of VOCs and the effects of sulfur resistance and chlorine resistance, can be combined with a bag dust collector without changing the existing devices of a factory, and can simultaneously remove VOCs and PM 2.5 , and has a long service life. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a structural schematic diagram of a rich-catalytic dual-function catalytic interface in an embodiment of the application. DETAILED DESCRIPTION

[0019] The following examples are only used to more clearly illustrate the technical solutions of the application, and cannot be used to limit the protection scope of the application.

[0020] Example 1

[0021] Step 1, preparation of the catalytic filter material.

[0022] (1) Pretreatment of the filter material base cloth.

[0023] The cut P84 filter material base cloth is cleaned with deionized water and anhydrous ethanol once, respectively, to remove impurities on the surface of the P84 filter material base cloth, and then the filter material base cloth is immersed in a treatment agent for 6 min, and then dried at 100 DEG C for 5 min, and cooled to room temperature for standby use. The treatment agent is a miscible solution of polytetrafluoroethylene emulsion and polyacrylate with a concentration of 5%, and the mass percentage concentration of the polybutyl acrylate emulsion is 10%.

[0024] (2) Preparation of the active stock solution.

[0025] ① 1.5 g of tetraamine platinum nitrate and 11.67 g of cerium nitrate are weighed, dissolved in 2 mL of deionized water, 60 mL of ethylene glycol is added, and the mixture is magnetically stirred at a speed of 500 r / min at 20 DEG C for 60 min until completely dissolved to obtain a liquid.

[0026] ② 0.1 g of sodium silicate, 0.56 g of aluminum sulfate, 0.39 g of rubidium chloride and 52.5 mL of deionized water were mixed, stirred at 500 r / min at 60°C for 50 min until completely dissolved to obtain liquid b.

[0027] (3) In-situ growth of enrichment-catalytic bifunctional catalytic interface.

[0028] ① 1 g of potassium permanganate was mixed with 20 mL of deionized water and magnetically stirred at 500 r / min for 30 min to obtain a potassium permanganate solution; the pretreated filter material base cloth was immersed in the a solution and ultrasonically stirred for 20 min; the potassium permanganate solution was slowly poured into the a solution containing the filter material base cloth, slowly stirred for 15 min, and the filter material base cloth and the a solution were simultaneously moved into a high-pressure reaction kettle with a Teflon lining, the reaction kettle was fixed in a homogeneous reactor, the rotation speed was 100 r / min, the temperature was 100°C, and heating was carried out for 2 h, 20 mL of polyvinyl alcohol curing agent was added for curing, and after cooling to room temperature, the filter material base cloth loaded with catalytically active components was taken out, washed with absolute ethanol for 2 times, washed with deionized water for 2 times, then placed in a forced air drying oven at 60°C for drying for 3 h, and then heated to 180°C for baking for 4 h.

[0029] ② The filter material base cloth loaded with catalytically active components after drying was immersed in the b solution and placed in a reactor for hydrothermal synthesis at 120°C, 20 mL of polyvinyl alcohol curing agent was added for curing, and after cooling to room temperature, the filter material base cloth was taken out, washed with absolute ethanol for 2 times, washed with deionized water for 2 times, placed in a forced air drying oven at 60°C for drying for 3 h, and then heated to 180°C for baking for 4 h to obtain a catalytic filter material. In the obtained catalytic filter material, the mass of the filter material base cloth was 10 g, the mass of the shell was 2.8 g, and the mass of the core was 1.6 g.

[0030] Step 2, preparation of anti-sulfur and anti-chlorine functional membrane.

[0031] (1) 0.1 g of titanium sulfate, 0.68 g of aluminum sulfate, 0.24 g of cobalt nitrate and 15.3 mL of deionized water were mixed; then magnetically stirred at 500 r / min at 80°C for 60 min to completely dissolve the salts; then 1 mol / L Na2CO3 solution was added and mixed at 400 r / min at 60°C to obtain a precipitate liquid; the precipitate in the precipitate liquid was filtered, washed, then dried in an oven at 50°C for 4 h, and then the precipitate was calcined in a muffle furnace at 300°C for 4 h to obtain an anti-sulfur and anti-chlorine catalytic powder.

[0032] (2) Take 4.8 g of polytetrafluoroethylene powder, 2.5 g of anti-sulfur and anti-chlorine catalyst powder, 0.5 g of fatty alcohol polyoxyethylene ether, 0.7 g of vinyl tri(β-methoxyethoxy) silane, and 1.5 g of ethylene glycol; put each material into a stirrer for mixing and stirring, the stirring speed is 600 r / min, the stirring time is 400 min, and after taking out, stand at 80°C for 24 h, to obtain the blank of anti-sulfur and anti-chlorine functional film.

[0033] (3) The blank of anti-sulfur and anti-chlorine functional film is extruded into a strip-shaped preform through a pre-extrusion step, and then the preform is calendered under the conditions of a temperature of 200°C, a pressure of 5 MPa, and a processing speed of 0.5 m / min; finally, stretching is performed, the stretching conditions are that the longitudinal stretching multiple is 2 times, the stretching temperature is 180°C, the thickness of the film is controlled to be 200 nm, the pore size is 60 nm, and the anti-sulfur and anti-chlorine functional film is formed by biaxial stretching of the preform in a first direction and in a second direction perpendicular to the first direction.

[0034] Step 3, anti-sulfur and anti-chlorine VOCs and PM 2.5 co-purification multifunctional filter material preparation.

[0035] The anti-sulfur and anti-chlorine functional film prepared in step 2 is hot-pressed with the catalytic filter material prepared in step 1 by a hot-pressing roller, the hot-pressing conditions are that the temperature is 150°C, the pressure is 5 MPa, and the processing speed on the hot-pressing roller is 2 m / min, and after processing, cooling, the anti-sulfur and anti-chlorine VOCs and PM 2.5 co-purification multifunctional filter material.

[0036] Example 2

[0037] Step 1, preparation of catalytic filter material.

[0038] (1) Filter cloth pretreatment.

[0039] The cut P84 filter cloth is washed with deionized water and anhydrous ethanol each for 1 time to remove impurities on the surface of the P84 filter cloth fibers, and then the filter cloth is immersed in a treatment agent for 6 min, and then dried at 100°C for 5 min, and cooled to room temperature for standby. The treatment agent is a mixed solution of polytetrafluoroethylene emulsion and polyacrylate with a concentration of 8%, and the mass percentage concentration of the polybutyl acrylate emulsion is 15%.

[0040] (2) Preparation of active stock solution.

[0041] ① Take 0.266 g of tetraamine platinum nitrate, 1.79 g of cerium nitrate, and 1 g of titanium sulfate, dissolve in 5 mL of deionized water, and then add 70 mL of ethylene glycol, and magnetically stir at a speed of 500 r / min at 40°C for 60 min until completely dissolved to obtain a liquid.

[0042] ② 0.1 g of sodium silicate, 0.56 g of aluminum sulfate, 0.29 g of rubidium nitrate and 42.75 mL of deionized water were mixed, stirred at 500 r / min for 60 min at 20°C until completely dissolved to obtain liquid b.

[0043] (3) In-situ growth of enrichment-catalytic bifunctional catalytic interface.

[0044] ① 1.2 g of potassium permanganate was mixed with 36 mL of deionized water, and magnetically stirred at 500 r / min for 30 min to obtain a potassium permanganate solution; the pretreated filter cloth was immersed in the a liquid and ultrasonically stirred for 40 min; the potassium permanganate solution was slowly poured into the a liquid containing the filter cloth, and slowly stirred for 15 min; the filter cloth and the a liquid were moved into a high-pressure reactor with a Teflon lining at the same time, the reactor was fixed in a homogeneous reactor, the rotation speed was 100 r / min, the temperature was 80°C, and the heating was carried out for 2 h; 20 mL of polyvinyl alcohol curing agent was added for curing; after cooling to room temperature, the filter cloth loaded with catalytically active components was taken out, washed with absolute ethanol for 2 times, then washed with deionized water for 2 times, then placed in a forced air drying oven at 60°C for drying for 3 h, and then heated to 180°C for baking for 4 h.

[0045] ② The filter cloth loaded with catalytically active components after drying was immersed in the b liquid, and hydrothermal synthesis was carried out in a reactor at 180°C; 20 mL of polyvinyl alcohol curing agent was added for curing; after cooling to room temperature, the filter cloth was taken out, washed with absolute ethanol for 2 times, then washed with deionized water for 2 times, then placed in a forced air drying oven at 75°C for drying for 3 h, and then heated to 180°C for baking for 4 h to dry, to obtain a catalytic filter. In the obtained catalytic filter, the mass of the filter cloth was 10 g, the mass of the shell was 2.6 g, and the mass of the core was 1.8 g.

[0046] Step 2, preparation of anti-sulfur and anti-chlorine functional film.

[0047] (1) 0.1 g of titanium sulfate, 0.43 g of aluminum sulfate, 0.12 g of cobalt chloride and 6.5 mL of deionized water were mixed; then magnetically stirred at 500 r / min for 90 min at 50°C to completely dissolve the salts; then 1.5 mol / L Na2CO3 solution was added and mixed at 400 r / min under magnetic stirring at 60°C to obtain a precipitate liquid; the precipitate in the precipitate liquid was filtered, washed, then dried in an oven at 50°C for 4 h, and then calcined in a muffle furnace at 300°C for 4 h to obtain an anti-sulfur and anti-chlorine catalytic powder.

[0048] (2) Take 5 g of polytetrafluoroethylene powder, 2 g of anti-sulfur and anti-chlorine catalyst powder, 0.5 g of sodium dinaphthylmethane disulfonate, 0.5 g of N-(β-aminoethyl)-γ-aminopropyl triethoxysilane, and 2 g of polyethylene glycol; put each material into a stirrer for mixing and stirring, the stirring speed is 500 r / min, the stirring time is 600 min, and after taking out, stand still at 80°C for 24 h to obtain the anti-sulfur and anti-chlorine functional film blank.

[0049] (3) The anti-sulfur and anti-chlorine functional film blank is extruded into a strip-shaped preformed body through a pre-extrusion step, and then the preformed body is calendered under the conditions of a temperature of 180°C, a pressure of 5 MPa, and a processing speed of 0.5 m / min; finally, stretching is performed, the stretching conditions are that the longitudinal stretching multiple is 4 times, the stretching temperature is 180°C, the thickness of the film is controlled to be 300 nm, the pore size is 100 nm, and the anti-sulfur and anti-chlorine functional film is formed by biaxial stretching of the preformed body in a first direction and in a second direction perpendicular to the first direction.

[0050] Step 3, anti-sulfur and anti-chlorine VOCs and PM 2.5 co-purification multifunctional filter material preparation.

[0051] The anti-sulfur and anti-chlorine functional film prepared in step 2 is hot-pressed with the catalytic filter material prepared in step 1 by a hot-pressing roller, the hot-pressing conditions are that the temperature is 180°C, the pressure is 5 MPa, and the processing speed on the hot-pressing roller is 5 m / min, and after processing, cooling is performed to obtain the anti-sulfur and anti-chlorine VOCs and PM 2.5 co-purification multifunctional filter material.

[0052] Example 3

[0053] Step 1, preparation of catalytic filter material.

[0054] (1) Filter cloth pretreatment.

[0055] The cut P84 filter cloth is washed once with deionized water and once with anhydrous ethanol to remove impurities on the surface of the P84 filter cloth fibers, then the filter cloth is immersed in a treatment agent for 6 min, and then dried at 100°C for 5 min and cooled to room temperature for standby. The treatment agent is a mixed solution of polytetrafluoroethylene emulsion and polyacrylate with a concentration of 10%, and the mass percentage concentration of the polybutyl acrylate emulsion is 12%.

[0056] (2) Preparation of active stock solution.

[0057] ① Take 0.26 g of tetraammine platinum nitrate, 0.1 g of tetraammine palladium nitrate, 1.78 g of cerium sulfate, and 0.82 g of manganese sulfate monohydrate, dissolve them in 10 mL of deionized water, then add 100 mL of ethylene glycol, and magnetically stir at a speed of 500 r / min at 40°C for 60 min until completely dissolved to obtain a liquid.

[0058] (2) 0.1 g of sodium silicate, 0.56 g of aluminum sulfate, 0.48 g of rubidium nitrate, and 51.3 mL of deionized water were mixed, and stirred at 500 r / min at 60°C for 120 min until completely dissolved to obtain liquid b.

[0059] (3) In-situ growth of enrichment-catalysis bifunctional catalytic interface.

[0060] (1) 1 g of potassium permanganate and 40 mL of deionized water were mixed, and magnetically stirred at 500 r / min for 40 min to obtain a potassium permanganate solution; the pretreated filter material base cloth was immersed in the liquid a, and ultrasonic stirring was performed for 30 min; the potassium permanganate solution was slowly poured into the liquid a containing the filter material base cloth, and slowly stirred for 15 min; the filter material base cloth and the liquid a were simultaneously moved into a high-pressure reaction kettle with a Teflon lining, the reaction kettle was fixed in a homogeneous reactor, the rotation speed was 100 r / min, the temperature was 80°C, and heating was performed for 2 h; 15 mL of polyvinyl alcohol curing agent was added for curing; after cooling to room temperature, the filter material base cloth loaded with the catalytically active component was taken out, washed twice with absolute ethanol, and then washed twice with deionized water; then it was placed in a forced air drying oven at 70°C for drying for 3 h, and then the temperature was increased to 180°C for baking for 4 h.

[0061] (2) The filter material base cloth loaded with the catalytically active component after drying was immersed in liquid b, and placed in a reactor for hydrothermal synthesis at 180°C; 15 mL of polyvinyl alcohol curing agent was added for curing; after cooling to room temperature, the filter material base cloth was taken out, washed twice with absolute ethanol, and then washed twice with deionized water; the filter material was placed in a forced air drying oven at 75°C for drying for 3 h, and then the temperature was increased to 130°C for baking for 4 h to obtain a catalytic filter material. In the obtained catalytic filter material, the mass of the filter material base cloth was 10 g, the mass of the shell was 3 g, and the mass of the core was 1.6 g.

[0062] Step 2, preparation of a sulfur-resistant and chlorine-resistant functional membrane.

[0063] (1) 0.1 g of titanium sulfate, 0.29 g of aluminum sulfate, and 0.11 g of cobalt chloride were mixed with 7.5 mL of deionized water; then magnetically stirred at 500 r / min at 50°C for 90 min until the salts were completely dissolved; then 1.2 mol / L Na2CO3 solution was added, and mixed and magnetically stirred at 400 r / min at 60°C to obtain a precipitate liquid; the precipitate in the precipitate liquid was suction filtered and washed; then dried in an oven at 50°C for 4 h; and then the precipitate was placed in a muffle furnace and calcined at 300°C for 4 h to obtain a sulfur-resistant and chlorine-resistant catalytic powder.

[0064] (2) Take 6 g of polytetrafluoroethylene powder, 2.5 g of anti-sulfur and anti-chlorine catalyst powder, 0.5 g of fatty alcohol polyoxyethylene ether, 0.5 g of γ-aminopropyl methyldiethoxysilane, and 1.5 g of ethylene glycol; put each material into a stirrer for mixing and stirring, the stirring speed is 500 r / min, the stirring time is 600 min, after taking out, stand still at 80°C for 24 h, then anti-sulfur and anti-chlorine functional film blank is obtained.

[0065] (3) The anti-sulfur and anti-chlorine functional film blank is extruded into a strip-shaped preform through a pre-extrusion step, then the preform is calendered under the conditions of a temperature of 180°C, a pressure of 5 MPa, and a processing speed of 0.5 m / min; finally, stretching is performed, the stretching conditions are that the longitudinal stretching multiple is 2 times, the stretching temperature is 100°C, the thickness of the film is controlled to be 500 nm, the pore size is 85 nm, and the anti-sulfur functional film is formed by biaxial stretching of the preform in a first direction and in a second direction perpendicular to the first direction.

[0066] Step 3, Anti-sulfur and anti-chlorine VOCs and PM 2.5 Collaborative purification multifunctional filter material preparation.

[0067] The anti-sulfur and anti-chlorine functional film prepared in step 2 is hot-pressed with the catalytic filter material prepared in step 1 by a hot-pressing roller, the hot-pressing conditions are that the temperature is 220°C, the pressure is 5 MPa, and the processing speed on the hot-pressing roller is 5 m / min, and after processing, cooling is performed, then an anti-sulfur and anti-chlorine VOCs and PM 2.5 collaborative purification multifunctional filter material is obtained.

[0068] Example 4

[0069] Step 1, preparation of catalytic filter material.

[0070] (1) Filter cloth pretreatment.

[0071] The cut P84 filter cloth is washed with deionized water and anhydrous ethanol each for 1 time to remove impurities on the surface of the P84 filter cloth fibers, then the filter cloth is immersed in a treatment agent for 6 min, and then dried at 100°C for 5 min, and cooled to room temperature for standby use. The treatment agent is a mixed solution of polytetrafluoroethylene emulsion and polyacrylate with a concentration of 10%, and the mass percentage concentration of the polybutyl acrylate emulsion is 15%.

[0072] (2) Preparation of active stock solution.

[0073] ① Take 0.162 g of tetraammine platinum nitrate, 0.1 g of tetraammine palladium nitrate, 1.36 g of cerium nitrate, and 0.43 g of titanium sulfate, dissolve in 8 mL of deionized water, then add 80 mL of ethylene glycol, and magnetically stir at a speed of 500 r / min at 40°C for 60 min until completely dissolved to obtain a liquid.

[0074] (2) 0.1 g of sodium silicate, 0.56 g of aluminum sulfate, 0.39 g of rubidium chloride and 52.5 mL of deionized water were weighed and mixed, and stirred at 500 r / min for 120 min at 60°C until completely dissolved to obtain liquid b.

[0075] (3) In-situ growth of enrichment-catalysis bifunctional catalytic interface.

[0076] (1) 1.2 g of potassium permanganate was mixed with 42 mL of deionized water and magnetically stirred at 500 r / min for 40 min to obtain a potassium permanganate solution; the pretreated filter cloth was immersed in the a liquid and ultrasonically stirred for 30 min; the potassium permanganate solution was slowly poured into the a liquid containing the filter cloth, and slowly stirred for 15 min; the filter cloth and the a liquid were simultaneously moved into a high-pressure reaction kettle with a Teflon lining, the reaction kettle was fixed in a homogeneous reactor, the rotation speed was 200 r / min, the temperature was 70°C, and heating was carried out for 2 h; 18 mL of polyvinyl alcohol curing agent was added for curing; after cooling to room temperature, the filter cloth loaded with catalytically active components was taken out, washed with absolute ethanol for 2 times, then washed with deionized water for 2 times, then placed in a forced air drying oven at 70°C for drying for 3 h, and then heated to 180°C for baking for 4 h.

[0077] (2) The filter cloth loaded with catalytically active components after drying was immersed in liquid b, and placed in a reactor for hydrothermal synthesis at 180°C; 18 mL of polyvinyl alcohol curing agent was added for curing; after cooling to room temperature, the filter cloth was taken out, washed with absolute ethanol for 2 times, then washed with deionized water for 2 times, then placed in a forced air drying oven at 75°C for drying for 3 h, and then heated to 130°C for baking for 4 h to obtain catalytic filter material. In the obtained catalytic filter material, the mass of the filter cloth was 10 g, the mass of the shell was 3 g, and the mass of the core was 1.6 g.

[0078] Step 2, preparation of anti-sulfur and anti-chlorine functional membrane.

[0079] (1) 0.1 g of titanium sulfate, 0.28 g of aluminum sulfate, 0.15 g of cobalt nitrate and 6.36 mL of deionized water were weighed and mixed; then magnetically stirred at 400 r / min for 70 min at 50°C until the salts were completely dissolved; then 1.05 mol / L Na2CO3 solution was added and mixed magnetically at 500 r / min at 60°C to obtain a precipitate liquid; the precipitate in the precipitate liquid was suction filtered and washed; then dried in an oven at 50°C for 4 h, and then the precipitate was placed in a muffle furnace and calcined at 300°C for 4 h to obtain anti-sulfur and anti-chlorine catalytic powder.

[0080] (2) Take 0.63 g of polytetrafluoroethylene powder, 0.17 g of anti-sulfur and anti-chlorine catalytic powder, 0.3 g of sodium dinaphthylmethane disulfonate, 0.7 g of vinyl tris (β-methoxyethoxy) silane, and 0.1 g of ethylene glycol; put each material into a stirrer for mixing and stirring, the stirring speed is 500 r / min, the stirring time is 600 min, and after taking out, stand still at 80°C for 36 h, to obtain the anti-sulfur and anti-chlorine functional film blank.

[0081] (3) The anti-sulfur and anti-chlorine functional film blank is extruded into a strip-shaped preformed body through a pre-extrusion step, and then the preformed body is calendered under the conditions of a temperature of 180°C, a pressure of 5 MPa, and a processing speed of 0.5 m / min; finally, stretching is performed, the stretching conditions are that the longitudinal stretching multiple is 3 times, the stretching temperature is 120°C, the thickness of the film is controlled to be 500 nm, the pore size is 65 nm, and the anti-sulfur and anti-chlorine functional film is formed by biaxial stretching of the preformed body in a first direction and in a second direction perpendicular to the first direction.

[0082] Step 3, Anti-sulfur and Anti-chlorine VOCs and PM 2.5 Synergistically Purified Multifunctional Filter Material Preparation.

[0083] The anti-sulfur and anti-chlorine functional film prepared in step 2 is hot-pressed and compounded with the catalytic filter material prepared in step 1 by a hot-pressing roller, the hot-pressing and compounding conditions are that the temperature is 240°C, the pressure is 5 MPa, and the processing speed on the hot-pressing roller is 5 m / min, and after processing and cooling, the anti-sulfur and anti-chlorine VOCs and PM 2.5 Synergistically Purified Multifunctional Filter Material is obtained.

[0084] Example 5

[0085] 1, The anti-sulfur and anti-chlorine VOCs and PM 2.5 Synergistically Purified Multifunctional Filter Material prepared in examples 1-4 has a structure of a rich-catalytic dual functional catalytic interface as shown in Figure 1 It can be known from Figure 1 that the rich-catalytic dual functional catalytic interface has a porous channel structure, can enrich VOCs in flue gas, and the core is Pt-Pd-Ce-Ti-Mn-O x composite oxide, which is the main active material of the catalyst, and through the “enrichment-catalysis” effect of the rich-catalytic dual functional catalytic interface on VOCs, high-efficiency filtration of VOCs can be achieved.

[0086] 2, The anti-sulfur and anti-chlorine VOCs and PM 2.5 Synergistically Purified Multifunctional Filter Material prepared in examples 1-4 is tested for VOCs removal rate, stability (i.e. anti-chlorine) and PM 2.5 removal rate.

[0087] (1) VOCs removal rate test.

[0088] The experimental device is composed of a gas distribution system, a flow control (mass flow meter), a gas mixer, a gas preheater, a catalytic reactor, and a flue gas analysis system. The inner diameter of the fixed tube reactor is 2.5 cm. The filter material is cut into a circular disc and placed in the fixed reactor. The filter material is in a constant temperature zone, and then the reactor is placed in the fixed tube reactor.

[0089] The simulated flue gas without SO2 is composed of toluene (600 ppm), O2 (8%), and carrier gas N2. The simulated flue gas with SO2 is composed of toluene (600 ppm), O2 (8%), SO2 (300 ppm), and carrier gas N2.

[0090] The filtration air speed is set to 1 m / min, and the reaction temperature is controlled at 200°C. The gas flow is controlled by a mass flow meter. The gas enters the reactor after being mixed by a gas mixer and heated by a heater. The toluene concentration at the inlet and outlet is measured by a chromatographic analyzer. In order to eliminate the influence of surface adsorption, the system is operated stably for 20-30 minutes before starting to collect the test results, as shown in Table 1.

[0091] The catalytic activity of the catalyst is reflected by the removal rate of toluene, which is calculated by the following formula: Toluene removal rate = [(C0-C) / C0] x 100%; Where C0 is the initial concentration of toluene, and C is the toluene concentration after treatment.

[0092] (2) Stability test.

[0093] Under the conditions of the simulated flue gas without SO2 in the VOCs removal rate test (1), i.e. toluene (600 ppm), O2 (8%), and carrier gas N2, the filtration air speed is set to 1 m / min, and the reaction temperature is controlled at 200°C. The gas flow is controlled by a mass flow meter, and the toluene removal rate of the test sample after 24 hours of continuous testing, i.e. the chlorine resistance of the sample, is tested, as shown in Table 1.

[0094] (3) PM 2.5 removal rate test.

[0095] The VDI filter material simulation test device is used to test the filtration performance of the sample, and Pural NF aluminum oxide dust is selected. The PM 2.5 concentration is 5 g / m 3 , the filtration air speed is 2 m / min, the dust cleaning pressure difference is 1000 Pa, the test area is 0.0154 m 2 , the pulse blowing interval is 5 s, the tank pressure is 0.5 MPa, the humidity is <50%, and the pulse valve opening time is 60 ms. The test results are shown in Table 1.

[0096] PM 2.5Removal rate = (1-C1 / C2) x 100% C1 is PM 2.5 Initial concentration, C2 is PM 2.5 concentration in the treated gas.

[0097] Table 1 toluene removal rate and PM 2.5 removal rate test results

[0098] As shown in Table 1, the samples prepared in Examples 1-4 all exhibit good VOCs and PM 2.5 removal effect and stability; among them, the sample prepared in Example 2 has the best effect on VOCs and PM 2.5 removal, and is less affected by SO2. The toluene removal rate can reach 99% under the condition of SO2, and the toluene removal rate can still reach 99% after 24h of continuous testing, which shows that the anti-sulfur and anti-chlorine VOCs and PM 2.5 co-purification multifunctional filter material provided by the present application has the characteristics of low-temperature and high-efficiency catalytic oxidation of VOCs, has the performance of simultaneously removing VOCs and PM 2.5 , and can effectively isolate the deposition and poisoning effect of H2O and SO2 and other substances on the catalyst, solves the problem of easy poisoning of the catalyst in the process of catalytic oxidation of VOCs, improves the stability of the multifunctional filter material, and prolongs the service life of the multifunctional filter material.

[0099] The above only describes the preferred embodiments of the present application, and it should be noted that for ordinary skilled persons in the technical field, several improvements and modifications can be made without departing from the technical principles of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A multifunctional filter material for the synergistic purification of VOCs and PM 2.5 against sulfur and chlorine, characterized in that The anti-sulfur and anti-chlorine functional membrane and catalytic filter material comprising a composite connection; the catalytic filter material comprises a filter base cloth and a rich-catalytic dual functional catalytic interface wrapped on the surface of the filter base cloth; The enrichment-catalysis bifunctional catalytic interface comprises a shell and a core, wherein the shell is Si-Al-Rb-O x The core is Pt-Pd-Ce-Ti-Mn-O x The core is Pt-Pd-Ce-Ti-Mn-O 2. The anti-sulfur anti-chlorine VOCs and PM 2.5 The multifunctional filter material for synergistically purifying, characterized in that, The mass of the shell is 20-30% of the mass of the filter base cloth, and the mass of the inner core is 15-20% of the mass of the filter base cloth.

3. The anti-sulfur and anti-chlorine VOCs and PM according to claim 1. 2.5 The multifunctional filter material for synergistically purifying, characterized in that, The blank of the anti-sulfur and anti-chlorine functional membrane comprises the following components by mass percentage: Anti-sulfur and anti-chlorine catalytic powder 10-30%; Polytetrafluoroethylene powder 48-73%; Diffusing agent 3-10%; Pore-forming agent 10-25%; Coupling agent 4-10%.

4. The anti-sulfur anti-chlorine VOCs and PM 2.5 The multifunctional filter material for synergistically purifying, characterized in that, The anti-sulfur and anti-chlorine catalytic powder is Ti-Al-Co-O x The composite oxide is an active component, wherein the molar mass ratio of Ti, Al and Co elements is 1:(1-3):(1-2). And / or, the diffusing agent is selected from one or more of fatty alcohol polyoxyethylene ether and sodium dinaphthylmethane disulfonate; And / or, the pore-forming agent is ethylene glycol or polyethylene glycol; And / or, the coupling agent is selected from one of vinyl tri(β-methoxyethoxy) silane, N-(β-aminoethyl)-γ-aminopropyl triethoxysilane, and γ-aminopropyl methyl diethoxysilane.

5. The anti-sulfur and anti-chlorine VOCs and PMs purification filter material according to any one of claims 1-4. 2.5 The preparation method of the synergistic purification multifunctional filter material is characterized by comprising the following steps: The method comprises the following steps: Dissolve platinum salt, palladium salt, cerium salt, titanium salt, and manganese salt in deionized water according to the proportion, then add ethylene glycol, and stir until completely dissolved to obtain a liquid; Dissolve silicon salt, aluminum salt, and rubidium salt in deionized water according to the proportion, and stir until completely dissolved to obtain a b liquid; After pretreatment, the filter base cloth is immersed in the a liquid, and after ultrasonic stirring, the potassium permanganate solution is poured into the a liquid containing the filter base cloth, and after stirring, the filter base cloth and the a liquid are moved into the reaction kettle at the same time, and the reaction kettle is fixed in the homogeneous reactor, and after heating reaction, a curing agent is added for curing, and then cooled to room temperature, the filter base cloth loaded with catalytically active components is taken out, washed and dried; The filter base cloth loaded with catalytically active components after drying is immersed in the b liquid, placed in a reactor for hydrothermal synthesis, and then a curing agent is added for curing, and the filter base cloth is taken out after cooling to room temperature, washed and dried to obtain a catalytic filter material; The anti-sulfur and anti-chlorine functional membrane and the catalytic filter material are hot-pressed by a hot-pressing roller to obtain the anti-sulfur and anti-chlorine VOCs and PM 2.5 The synergistic purification multifunctional filter material.

6. The anti-sulfur anti-chlorine VOCs and PM 2.5 The preparation method of the synergistic purification multifunctional filter material, characterized in that, The preparation method of the a liquid comprises the following steps: weighing platinum salt, palladium salt, cerium salt, titanium salt, and manganese salt according to the proportion, dissolving them in deionized water, and then adding ethylene glycol, and stirring at a speed of 100-500 r / min at 20-60°C until completely dissolved. The preparation method of the b liquid comprises the following steps: mixing silicon salt, aluminum salt, and rubidium salt with deionized water, wherein the mass ratio of the total mass of silicon salt, aluminum salt, and rubidium salt to the mass of deionized water is 1:(10-50), and stirring at a speed of 100-500 r / min at 20-60°C for 50-120 min until completely dissolved.

7. The anti-sulfur and anti-chlorine VOCs and PM according to claim 5. 2.5 The preparation method of the multifunctional filter material for synergistic purification, characterized in that, The specific preparation method of the catalytic filter material comprises the following steps: Mix potassium permanganate and deionized water in a mass ratio of 1:(20-40), and stir at a speed of 100-500 r / min for 30-60 min to obtain a potassium permanganate solution. After the pretreated filter material base cloth is immersed in the a liquid, it is ultrasonically stirred for 20-40 min, then the potassium permanganate solution is poured into the a liquid containing the filter material base cloth, and stirred for 5-15 min, then the filter material base cloth and the a liquid are simultaneously moved into a reaction kettle with a Teflon lining, and the reaction kettle is fixed in a homogeneous reactor, the rotating speed is 100 r / min, the temperature is 80-100 DEG C, the heating reaction is carried out for 2-3 h, then polyvinyl alcohol curing agent is added for curing, and then cooled to room temperature, the filter material base cloth loaded with the catalytically active component is taken out, washed with anhydrous ethanol for 2 times, washed with deionized water for 2 times, and then placed in a forced air drying oven for drying at 60-100 DEG C for 3 h, and then heated to 180-200 DEG C for baking for 4 h. The filter material base cloth loaded with the catalytically active component after drying is immersed in the b liquid, placed in a reactor, and subjected to hydrothermal synthesis at 100-200 DEG C, then polyvinyl alcohol curing agent is added for curing, and then cooled to room temperature, the filter material base cloth is taken out, washed with anhydrous ethanol for 2 times, washed with deionized water for 2 times, and then placed in a forced air drying oven for drying at 60-100 DEG C for 3 h, and then heated to 180-200 DEG C for baking for 4 h, to obtain the catalytic filter material.

8. The anti-sulfur anti-chlorine VOCs and PM according to claim 5. 2.5 The preparation method of the synergistic purification multifunctional filter material is characterized by comprising the steps of, The preparation method of the anti-sulfur and anti-chlorine functional film comprises: The soluble titanium salt, aluminum salt and cobalt salt are mixed with deionized water, wherein the mass ratio of the total mass of the titanium salt, aluminum salt and cobalt salt to the mass of the deionized water is 1:(10-15); then the mixture is stirred at a rotating speed of 400-600 r / min at 50-80 DEG C for 30-90 min to make the salts completely dissolved; then 0.3-1.5 mol / L Na2CO3 solution is added and mixed at a rotating speed of 400-600 r / min at 20-80 DEG C by magnetic stirring to obtain a precipitate liquid; the precipitate in the precipitate liquid is subjected to suction filtration and washing; then the precipitate is dried in an oven at 50-100 DEG C for 4-8 h, and then calcined in a muffle furnace at 300-950 DEG C for 4-12 h, to obtain the anti-sulfur and anti-chlorine catalytic powder; The polytetrafluoroethylene powder, anti-sulfur and anti-chlorine catalytic powder, diffusing agent, coupling agent and pore-forming agent are weighed according to the proportion, and then placed in a stirrer for mixing and stirring, wherein the stirring speed is 100-1000 r / min and the stirring time is 60-600 min; after taking out, the blank of the anti-sulfur and anti-chlorine functional film is obtained by standing at 60-80 DEG C for 24-48 h; The blank of the anti-sulfur and anti-chlorine functional film is extruded into a strip-shaped preformed body through a pre-extrusion step, and then the preformed body is calendered under the conditions of a temperature of 150-300 DEG C, a pressure of 5-8 Mpa and a processing speed of 0.5-1.5 m / min; finally, the preformed body is stretched, wherein the longitudinal stretching multiple is 2-5 times, the stretching temperature is 90-200 DEG C, the thickness of the film is controlled to be 200-500 nm, the pore size is 60-100 nm, and the anti-sulfur and anti-chlorine functional film is formed by biaxial stretching of the preformed body in a first direction and in a second direction perpendicular to the first direction.

9. The anti-sulfur anti-chlorine VOCs and PM according to claim 8. 2.5 The preparation method of the synergistic purification multifunctional filter material, characterized in that, The silicon salt is sodium silicate, the aluminum salt is aluminum sulfate, and the rubidium salt is rubidium chloride or rubidium nitrate. The platinum salt is selected from tetraammine platinum nitrate, the palladium salt is selected from tetraammine palladium nitrate, the cerium salt is selected from cerium nitrate or cerium sulfate, the titanium salt is selected from titanium sulfate, and the manganese salt is selected from manganese sulfate monohydrate. The cobalt salt is selected from cobalt nitrate or cobalt chloride.

10. The anti-sulfur anti-chlorine VOCs and PM according to claim 5. 2.5 The preparation method of the synergistic purification multifunctional filter material, characterized in that, The conditions of the hot-pressing compounding include that the temperature is 100-240 DEG C, the pressure is 1-5 MPa, and the processing speed on the hot-pressing roller is 2-5 m / min.

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