CN111229246A - Fenton catalyst and preparation method thereof - Google Patents

Fenton catalyst and preparation method thereof Download PDF

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Publication number
CN111229246A
CN111229246A CN202010058449.9A CN202010058449A CN111229246A CN 111229246 A CN111229246 A CN 111229246A CN 202010058449 A CN202010058449 A CN 202010058449A CN 111229246 A CN111229246 A CN 111229246A
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catalyst
fenton catalyst
fenton
active
boron
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田小军
范飞
梁琪
赵磊
王伟
杨成龙
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Beijing Water Business Doctor Co ltd
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Beijing Water Business Doctor Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/889—Manganese, technetium or rhenium
    • B01J23/8892—Manganese
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
    • B01J37/0063—Granulating
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/722—Oxidation by peroxides
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/02—Specific form of oxidant
    • C02F2305/026—Fenton's reagent

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Catalysts (AREA)

Abstract

The invention provides a Fenton catalyst and a preparation method thereof, wherein the preparation technology of the Fenton catalyst is combined with rolling granulation, so that the specific surface area of the catalyst is high, the pore size distribution is uniform, the pore volume is proper, the surface performance of the catalyst can be changed by the boron element in combination with the doping of the metal element and the boron element, and a synergistic effect is formed with other metal active ingredients, so that the specific surface of the catalyst can be ensured by the further rolling granulation method to the maximum, the effect of the boron element can be exerted to the maximum, and the catalytic activity of the Fenton catalyst is integrally improved; in addition, the active components are uniformly doped inside and outside the active alumina through rolling granulation, so that the active components can be uniformly and continuously released, the service life of the catalyst is prolonged, and the industrial application and popularization are facilitated; furthermore, the preparation method is prepared in an integrated manner, has a simple preparation process and low production cost, and is suitable for industrial production and application.

Description

Fenton catalyst and preparation method thereof
Technical Field
The invention relates to the technical field of catalyst preparation, and particularly relates to a Fenton catalyst and a preparation method thereof.
Background
At present, with the continuous deepening of the industrialization degree, the discharge amount of industrial sewage is continuously increased, and the environmental pollution degree is increasingly aggravated. And the domestic chemical enterprises are continuously developing towards the trends of industrial content subdivision, production process diversification and industrial product refinement, so that the industrial sewage has complex pollutant components, various organic matters with large content, high toxicity and difficult biodegradation. In addition, with the increasing of national environmental protection regulation and the stricter of pollutant discharge indexes, the biological method can not completely reach the treatment target. The Fenton oxidation method is an important component in advanced oxidation technology, and is widely researched and applied at home and abroad in the advanced treatment of refractory organic wastewater due to the characteristics of simple and convenient operation, mild reaction conditions and non-selective oxidation of organic substrates. The research and development of the heterogeneous Fenton catalytic oxidation technology overcome the defects of narrow reaction pH, high iron mud yield, high medicine consumption, long process chain and the like of the traditional Fenton oxidation method and accelerate the application process of the technology. However, Fenton catalyst has many industrial application obstacles as a key part of heterogeneous Fenton catalytic oxidation technology.
Disclosure of Invention
In order to solve the above-mentioned disadvantages, the present invention provides a fenton catalyst comprising: the base component plays a supporting role, and the active component comprises a metal element and a boron element; the fenton catalyst was formed by roll granulation.
In certain embodiments, the base component comprises chi-alumina and rho-alumina
In certain embodiments, the metal elements include Fe, Cu, Mn, Ce, and Zn elements.
In certain embodiments, the boron is present in an amount of 0.005 to 0.01% by weight.
In certain embodiments, the mass fractions of Fe, Cu, Mn, Ce, and Zn elements are: 4.0-6.0%, 1.0-2.0%, 0.5-1.0%, 0.5-1.0%, 0.01-0.05%.
In certain embodiments, the mass ratio of the active component to the base component is 6.015-10.06%: 1.
In certain embodiments, the fenton catalyst is formed by a roll granulation process.
In certain embodiments, the base component is a quick-release powder.
The invention also provides a preparation method of the Fenton catalyst, which comprises the following steps:
providing a solid basic component and an active component precursor solution;
adding the basic component into a sugar coating machine for rolling granulation, and spraying the active component precursor solution onto the surface of the basic component in the rolling granulation process to obtain an intermediate product;
roasting the intermediate product to obtain the Fenton catalyst; wherein the active component comprises a metal element and a boron element.
In certain embodiments, further comprising:
and curing the intermediate product for 12-24 hours in a heat preservation state before roasting the intermediate product.
The invention has the beneficial effects
The invention provides a Fenton catalyst and a preparation method thereof, wherein the preparation technology of the Fenton catalyst is combined with rolling granulation, so that the specific surface area of the catalyst is high, the pore size distribution is uniform, the pore volume is proper, the surface performance of the catalyst can be changed by the boron element in combination with the doping of the metal element and the boron element, and a synergistic effect is formed with other metal active ingredients, so that the specific surface of the catalyst can be ensured by the further rolling granulation method to the maximum, the effect of the boron element can be exerted to the maximum, and the catalytic activity of the Fenton catalyst is integrally improved; in addition, the active components are uniformly doped inside and outside the active alumina through rolling granulation, so that the active components can be uniformly and continuously released, the service life of the catalyst is prolonged, and the industrial application and popularization are facilitated; furthermore, the preparation method is prepared in an integrated manner, has a simple preparation process and low production cost, and is suitable for industrial production and application.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 shows a flow chart of the preparation of a Fenton catalyst in the example of the present invention.
Fig. 2 shows a scanning electron microscope image of the fenton catalyst in the example of the present invention.
FIG. 3 is a schematic diagram showing the comparison of the effect of the Fenton catalyst (containing boron) and the non-boron-containing Fenton catalyst in the embodiment of the invention on the degradation of the COD in the coking wastewater.
FIG. 4 shows a schematic diagram of COD removal effect and hydrogen peroxide utilization efficiency of polyformaldehyde wastewater catalytically degraded by a Fenton catalyst in an embodiment of the invention.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
Various cross-sectional views in accordance with the disclosed embodiment of the invention are shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers, and relative sizes and positional relationships therebetween shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, as actually required.
The present invention provides a fenton catalyst comprising: the base component plays a supporting role, and the active component comprises a metal element and a boron element; the fenton catalyst was formed by roll granulation.
The invention provides a Fenton catalyst, which can ensure that the specific surface area of the catalyst is high, the pore size distribution is uniform and the pore volume is proper by combining a rolling granulation preparation process, meanwhile, by combining the doping of metal elements and boron elements, the boron elements can change the surface performance of the catalyst and simultaneously form a synergistic effect with other 'metal active ingredients', and a further rolling granulation method can ensure the specific surface of the catalyst to the maximum extent, so that the effect of the boron elements is exerted to the maximum extent, and the catalytic activity of the Fenton catalyst is integrally improved; in addition, the active components are uniformly doped inside and outside the active alumina through rolling granulation, so that the active components can be uniformly and continuously released, the service life of the catalyst is prolonged, and the industrial application and popularization are facilitated; furthermore, the preparation method is prepared in an integrated manner, has a simple preparation process and low production cost, and is suitable for industrial production and application.
Specifically, the structure and the morphology of the catalyst can be optimized by doping boron, Lewis acidity on the surface of the catalyst is enhanced, and further the catalytic activity of the catalyst is improved.
The base component of the present invention is primarily supportive and, in certain embodiments, comprises chi-alumina and rho-alumina.
In a specific embodiment, the base component is a quick release powder comprising chi-alumina and rho-alumina as described above.
In some embodiments, the metal elements in the fenton catalyst include Fe, Cu, Mn, Ce, and Zn elements.
Furthermore, the mass fraction of boron is 0.005-0.01%, and the mass fractions of Fe, Cu, Mn, Ce and Zn elements are respectively: 4.0-6.0%, 1.0-2.0%, 0.5-1.0%, 0.5-1.0%, 0.01-0.05%, wherein the mass ratio of the active component to the basic component is 6.015-10.06% to 1.
Of course, the above-mentioned proportion is not exclusive and can be set as required, but when the mass fraction of boron is 0.005-0.01%, the doping effect is the best.
The technical personnel in the field understand that for the Fenton catalyst, a precursor solution consists of active components, wherein the active components comprise a metal element group of Fe, Cu, Mn, Ce and Zn elements and a non-metal element group of B elements, when the precursor solution is prepared, a proper amount of tap water is mixed and added into the active components to prepare a solution with a certain proportion, the solution is stirred for 20-30 min, when the precursor solution is granulated in a rolling mode, the precursor solution is fully stirred to be uniform and then transferred into spraying equipment, the stirring is carried out for 10min, after the spraying equipment is started, a nozzle of the spraying equipment is sprayed, the quick-release powder is granulated in a rolling mode through a sugar coating machine, the nozzle faces a granulating area in the sugar coating machine, and the precursor solution is sprayed to the quick-release powder which is formed slowly.
The sugar-coating machine may employ presently known apparatuses, and the present invention is not limited thereto.
In a preferred embodiment, the intermediate product with a set particle size can be screened out, which is favorable for product homogenization, so that the product performance of the same batch is the same.
In the embodiment, in order to ensure the stability of the surface components of the catalyst, the intermediate product is placed in a sealing sleeve for heat preservation and health preservation for 12-24 hours, and the intermediate product with stable surface properties is obtained.
In a preferred embodiment, a screen is adopted for screening, the aperture of the screen is 3-5mm, and the size of the screened particle is 3-5mm, so that the requirement of industrial application is met.
After the rolling granulation, the formed product needs to be roasted, for example, the roasting can be carried out by adopting a muffle furnace, the muffle furnace can set the roasting temperature, furthermore, the muffle furnace is provided with a loudspeaker and an automatic control assembly, and when the set time is up, the automatic control assembly controls the loudspeaker to give out a prompt sound, thereby being beneficial to the automatic control.
In a preferred embodiment, a display and a control panel are further arranged on the muffle furnace, the display is fixed at the front end of the muffle furnace, and a touch button is arranged on the control panel. The display can display the real-time baking state, such as temperature and other information, and the touch button can adjust the baking parameters such as temperature, time and the like, which is not described herein any more.
In a preferred embodiment, in the rolling granulation process, a spraying device is used which is provided with uniformly distributed micropores, and further, the diameter of the micropores is smaller than 1mm, and the micropores smaller than 1mm are, on one hand, of a size which can avoid the blocking phenomenon during spraying, and on the other hand, can make the spraying more uniform and the active ingredients distributed on the quick-release powder more uniform.
In a preferred embodiment, the distance between any two micropores on the spraying equipment is less than 5mm, which is more favorable for product homogenization.
The preparation process can ensure that the specific surface area of the catalyst is high, the pore size distribution is uniform and the pore volume is proper, and is favorable for improving the catalytic activity of the Fenton catalyst.
Specifically, the detailed procedure of the tumbling granulation process is as follows:
(1) base/active ingredient formulation: the composite material can be divided into two types of basic components and active components according to different functions of the components, wherein the basic components are quick-release powder (the main components are mixture of Chi-alumina and rho-alumina), and the active components comprise a metal element group of Fe, Cu, Mn, Ce and Zn and a non-metal element group of B element. And mixing the active ingredients, adding a proper amount of tap water, preparing a solution in a certain proportion, stirring for 20-30 min, fully stirring until the solution is uniform, transferring the solution to spraying equipment, and stirring for 10min to obtain an active ingredient precursor solution.
(2) And (3) catalyst molding: the active alumina-based Fenton catalyst is molded by adopting a rolling granulation method, specifically, quick-release powder with certain mass is added into a sugar-coating machine, an active component precursor solution is uniformly sprayed to the surface of the quick-release powder by using spraying equipment, the volume ratio of the quick-release powder mass to the precursor solution is 1: 0.4-1: 0.6(m/v), and a catalyst intermediate product A is prepared.
(3) Screening and maintaining catalysts: screening the catalyst intermediate product A by using a screen with a specified mesh number to obtain a catalyst intermediate product B with the particle size of 3-5mm, transferring the intermediate product B into a sealed plastic bag, and curing for 12-24 h under the heat preservation condition to obtain a catalyst intermediate product C.
(4) Roasting: and (3) transferring the catalyst intermediate product C to a muffle furnace for roasting at 380-680 ℃, wherein the roasting time is 2-6 h, and cooling to room temperature to finally obtain the composite metal/nonmetal active alumina-based Fenton catalyst.
It is obvious to those skilled in the art that the process flow of the above rolling granulation method can be summarized as a method for preparing a fenton catalyst, which specifically comprises:
step S1: providing a solid basic component and an active component precursor solution;
step S2: adding the basic component into a sugar coating machine for rolling granulation, and spraying the active component precursor solution onto the surface of the basic component in the rolling granulation process to obtain an intermediate product;
step S3: roasting the intermediate product to obtain the Fenton catalyst; wherein the active component comprises a metal element and a boron element.
The invention provides a preparation method of a Fenton catalyst, which can ensure that the specific surface area of the catalyst is high, the pore size distribution is uniform and the pore volume is proper by combining a rolling granulation preparation process, meanwhile, by combining the doping of metal elements and boron elements, the boron elements can change the surface performance and simultaneously form a synergistic effect with other metal active ingredients, and the further rolling granulation method can ensure the specific surface of the catalyst to the maximum extent, so that the effect of the boron elements is exerted to the maximum extent, and the catalytic activity of the Fenton catalyst is integrally improved; in addition, the active components are uniformly doped inside and outside the active alumina through rolling granulation, so that the active components can be uniformly and continuously released, the service life of the catalyst is prolonged, and the industrial application and popularization are facilitated; furthermore, the preparation method is prepared in an integrated manner, has a simple preparation process and low production cost, and is suitable for industrial production and application.
Further, the method further comprises: and curing the intermediate product for 12-24 hours in a heat preservation state before roasting the intermediate product.
The effects of the present invention will be described in detail with reference to specific scenarios.
Scenario 1-preparation Process
The preparation process of the composite metal/nonmetal active alumina-based heterogeneous Fenton catalyst is shown as the attached figure 1, and the specific implementation steps are as follows:
(1) base/active ingredient formulation: the composite material can be divided into two types of basic components and active components according to different functions of the components, wherein the basic component is quick-release powder (the main component is a mixture of chi-alumina and rho-alumina), and the active components comprise a metal element group of Fe, Cu, Mn, Ce and Zn and a non-metal element group of B element. And mixing the active ingredients, adding a proper amount of tap water, preparing a solution in a certain proportion, stirring for 20-30 min, fully stirring until the solution is uniform, transferring the solution to spraying equipment, and stirring for 10min to obtain an active ingredient precursor solution.
(2) And (3) catalyst molding: the active alumina-based Fenton catalyst is molded by adopting a rolling granulation method, specifically, quick-release powder with certain mass is added into a sugar-coating machine, an active component precursor solution is uniformly sprayed to the surface of the quick-release powder by using spraying equipment, the volume compatibility of the quick-release powder mass and the precursor solution is 1: 0.4-1: 0.6(m/v), and a catalyst intermediate product A is prepared.
(3) Screening and maintaining catalysts: screening the catalyst intermediate product A by using a screen with a specified mesh number to obtain a catalyst intermediate product B with the particle size of 3-5mm, transferring the intermediate product B into a sealed plastic bag, and curing for 12-24 h under the heat preservation condition to obtain a catalyst intermediate product C.
(4) Roasting: and (3) transferring the catalyst intermediate product C to a muffle furnace for roasting at 380-680 ℃, wherein the roasting time is 2-6 h, and cooling to room temperature to finally obtain the composite metal/nonmetal active alumina-based Fenton catalyst.
To further illustrate the surface characteristics and the application effects of the present invention in relation to the composite metal/non-metal active alumina-based heterogeneous fenton catalyst, the present invention is further illustrated in connection with physicochemical characterization and contaminant monitoring means.
Scene 2-comparison of application effects of boron-containing/non-boron-containing Fenton catalysts in wastewater treatment
(1) Accurately weighing FeSO4.7H2O，CuSO4.5H2O，MnSO4.H2O，Ce(SO4)2.7H2O，ZnSO4.7H2500g, 150g, 75g, 2.5g and 0.75g of O and B powders as Fenton catalysts of the invention, then FeSO4.7H2O，CuSO4.5H2O，MnSO4.H2O，Ce(SO4)2.7H2O and ZnSO4.7H2500g, 150g, 75g and 2.5g of O as a comparison group of the non-boron-containing Fenton catalyst are respectively mixed and placed in a suitable beaker, 5L of tap water is added and stirred until the mixture is completely dissolved to form a precursor solution for later use;
(2) respectively and accurately weighing 10kg of quick-release powder, and molding by adopting a rolling granulation method. Uniformly spreading a proper amount of quick-release powder into sugar-coating machine equipment in multiple batches, and uniformly spraying the boron-containing active component precursor solution and the non-boron-containing active component precursor solution in the step (1) by using spraying equipment to prepare a formed product;
(3) screening the molded product by using a 3-5mm screen, transferring the molded product into a sealed plastic bag, and preserving heat for 12 hours;
(4) and (3) placing the product after the cultivation in the step (3) in a muffle furnace for roasting for 2 hours, wherein the roasting temperature is 580 ℃, the time of a temperature rise stage is 30min, the temperature rise rate is 19.33 ℃/min, and two active alumina-based heterogeneous Fenton catalysts are finally obtained after roasting is finished.
Scanning electron microscope characterization is carried out on the obtained product of the boron-containing Fenton catalyst, and the result is shown in figure 2.
The obtained boron-containing Fenton catalyst product and non-boron-containing Fenton catalyst product are respectively used as heterogeneous Fenton catalytic oxidation technical catalysts to carry out advanced treatment on coking wastewater of a certain chemical plant, the COD of raw wastewater is 250-300 mg/L, after the advanced treatment is carried out by using the boron-containing Fenton catalyst, under the condition that the pH value of hydrogen peroxide is 1/1000, the removal rate of the corresponding COD can reach 49.70% when the reaction pH value is 3-4. Under the same conditions, after advanced treatment by using the non-boron-containing Fenton catalyst, the removal rate of COD is just 35.80 percent. The corresponding results are shown in FIG. 3.
Scene 3-application effect of sewage treatment
(1) Accurately weighing FeSO respectively4.7H2O，CuSO4.5H2O，MnSO4.H2O，Ce(SO4)2.7H2O，ZnSO4.7H2500g, 150g, 75g, 2.5g and 0.75g of O and B powder are mixed and placed in a suitable beaker, 5L of tap water is added and stirred until the mixture is completely dissolved to form a precursor solution for later use;
(2) 10kg of quick-release powder is accurately weighed and molded by adopting a rolling granulation method. Uniformly spreading a proper amount of quick-release powder into sugar-coating machine equipment in multiple batches, and uniformly spraying the active component precursor solution obtained in the step (1) by using spraying equipment to prepare a formed product;
(3) screening the molded product by using a 3-5mm screen, transferring the molded product into a sealed plastic bag, and preserving heat for 12 hours;
(4) and (3) placing the product after the cultivation in the step (3) in a muffle furnace for roasting for 2 hours, wherein the roasting temperature is 580 ℃, the time of a temperature rise stage is 30min, the temperature rise rate is 19.33 ℃/min, and the composite metal/nonmetal active alumina-based heterogeneous Fenton catalyst is finally obtained after roasting is finished.
The obtained catalyst product is used as a heterogeneous Fenton catalytic oxidation technical catalyst to carry out advanced treatment continuous pilot test experiments (continuous water inlet experiment period is 20 days) on polyoxymethylene wastewater of a certain chemical plant, the COD of raw wastewater is 211.2-293.5 mg/L, after the advanced treatment, the removal rate of corresponding COD can respectively reach 45.184% and 56.52% to the maximum under the condition that the reaction pH is 4-5 and the adding amount of hydrogen peroxide is 1/1000 and 2/1000 respectively. In addition, the reaction system has excellent hydrogen peroxide utilization efficiency, and when the hydrogen peroxide is 2/1000, the corresponding hydrogen peroxide utilization rate is relatively stable and is between 69.19 and 92.11 percent. The corresponding results are shown in FIG. 4.
According to the scene, the preparation process of the Fenton catalyst can ensure that the catalyst is high in specific surface area, uniform in pore size distribution and proper in pore volume by combining with the rolling granulation, meanwhile, by combining with doping of metal elements and boron elements, the boron elements can change the surface performance of the catalyst, and simultaneously, the boron elements and other metal active ingredients form a synergistic effect, the further rolling granulation method can ensure the specific surface of the catalyst to the maximum extent, so that the effect of the boron elements is exerted to the maximum extent, and the catalytic activity of the Fenton catalyst is integrally improved; in addition, the active components are uniformly doped inside and outside the active alumina through rolling granulation, so that the active components can be uniformly and continuously released, the service life of the catalyst is prolonged, and the industrial application and popularization are facilitated; furthermore, the preparation method is prepared in an integrated manner, has a simple preparation process and low production cost, and is suitable for industrial production and application. It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.

Claims (10)

1. A fenton catalyst, comprising: the base component plays a supporting role, and the active component comprises a metal element and a boron element; the fenton catalyst was formed by roll granulation.
2. A fenton catalyst according to claim 1, wherein the base component comprises chi-alumina and rho-alumina.
3. Fenton catalyst according to claim 1, characterised in that the metal elements comprise Fe, Cu, Mn, Ce and Zn elements.
4. A fenton catalyst according to claim 2, wherein the mass fraction of the boron element is 0.005-0.01%.
5. A fenton catalyst according to claim 2, wherein the mass fractions of Fe, Cu, Mn, Ce and Zn are respectively: 4.0-6.0%, 1.0-2.0%, 0.5-1.0%, 0.5-1.0%, 0.01-0.05%.
6. A Fenton catalyst according to claim 1, characterised in that the mass ratio of the active component to the base component is 6.015-10.06%: 1.
7. A fenton catalyst according to claim 1, wherein the fenton catalyst is formed by a roll granulation process.
8. A fenton catalyst according to claim 2, wherein the base component is a fast-falling powder.
9. A method for preparing a Fenton catalyst, comprising:
providing a solid basic component and an active component precursor solution;
adding the basic component into a sugar coating machine for rolling granulation, and spraying the active component precursor solution onto the surface of the basic component in the rolling granulation process to obtain an intermediate product;
roasting the intermediate product to obtain the Fenton catalyst; wherein the active component comprises a metal element and a boron element.
10. A method of producing a fenton catalyst according to claim 9, further comprising:
and curing the intermediate product for 12-24 hours in a heat preservation state before roasting the intermediate product.
CN202010058449.9A 2020-01-19 2020-01-19 Fenton catalyst and preparation method thereof Pending CN111229246A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
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