CN114669321A - Cobalt-containing zeolite catalyst and preparation method and application thereof - Google Patents

Cobalt-containing zeolite catalyst and preparation method and application thereof Download PDF

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Publication number
CN114669321A
CN114669321A CN202210420040.6A CN202210420040A CN114669321A CN 114669321 A CN114669321 A CN 114669321A CN 202210420040 A CN202210420040 A CN 202210420040A CN 114669321 A CN114669321 A CN 114669321A
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cobalt
reaction
zeolite catalyst
containing zeolite
molecular sieve
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徐少丹
唐俊红
李欢旋
王春辉
杜佳
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Hangzhou Dianzi University
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Hangzhou Dianzi University
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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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
    • B01J29/42—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively containing iron group metals, noble metals or copper
    • B01J29/46—Iron group metals or copper
    • 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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
    • B01J29/10—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y containing iron group metals, noble metals or copper
    • B01J29/14—Iron group metals or copper
    • 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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/18—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type
    • B01J29/20—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type containing iron group metals, noble metals or copper
    • B01J29/24—Iron group metals or copper
    • 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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/65—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the ferrierite type, e.g. types ZSM-21, ZSM-35 or ZSM-38, as exemplified by patent documents US4046859, US4016245 and US4046859, respectively
    • B01J29/66—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the ferrierite type, e.g. types ZSM-21, ZSM-35 or ZSM-38, as exemplified by patent documents US4046859, US4016245 and US4046859, respectively containing iron group metals, noble metals or copper
    • B01J29/68—Iron group metals or copper
    • 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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
    • B01J29/72—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 containing iron group metals, noble metals or copper
    • B01J29/7215—Zeolite Beta
    • 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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
    • B01J29/72—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 containing iron group metals, noble metals or copper
    • B01J29/723—CHA-type, e.g. Chabazite, LZ-218
    • 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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
    • B01J29/72—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 containing iron group metals, noble metals or copper
    • B01J29/7276—MWW-type, e.g. MCM-22, ERB-1, ITQ-1, PSH-3 or SSZ-25
    • 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
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/0201—Impregnation
    • 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
    • B01J37/30—Ion-exchange
    • 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
    • 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
    • B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
    • B01J2229/10—After treatment, characterised by the effect to be obtained
    • B01J2229/18—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
    • B01J2229/186—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself not in framework positions
    • 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
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/02—Specific form of oxidant
    • C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical

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

Abstract

The invention discloses a preparation method of a cobalt-containing zeolite catalyst, which introduces any one of cobalt ions, metal cobalt particles and cobalt oxide particles into a zeolite molecular sieve. Compared with the traditional organic framework cobalt material or soluble cobalt salt, the molecular sieve catalyst adopted in the method has the characteristics of higher reaction efficiency and better stability in the reaction of treating the organic pollutants in the wastewater.

Description

Cobalt-containing zeolite catalyst and preparation method and application thereof
Technical Field
The invention relates to the technical field of water pollution control, in particular to a cobalt-containing zeolite catalyst and a preparation method and application thereof.
Background
However, with the rapid development of social economy and industry, the discharge of a large amount of organic wastewater makes the quality of the water environment more and more unattractive, and water body pollution becomes one of the ten environmental problems all over the world. Wherein, a great amount of existing organic pollutants which are difficult to degrade can not be thoroughly removed by utilizing the traditional water treatment process, and the difficulty is increased for water purification.
In particular, the continuous development of chemical industry has promoted the rapid soaring of economic society, but the industrial wastewater pollution caused by the continuous development of chemical industry cannot be ignored. The dye wastewater is one of the main harmful industrial wastewater, and the treatment effect of the traditional water treatment process is not ideal due to the stable chemical structure and poor biodegradability of the contained disperse dye. Therefore, the degradation removal of the dye-type pollutants in the wastewater becomes one of the challenges of current water environment treatment.
In recent years, Advanced Oxidation Processes (AOPs) have been widely studied as an environment-friendly Process, and are a new technology with a great application prospect. It utilizes strong oxidizing free radicals to degrade organic pollutants, and can directly mineralize the organic pollutants into CO2And H2O or to increase the biodegradability of the pollutants by oxidation. However, the existing catalyst has the problems of low efficiency, poor stability, harsh reaction conditions, easy loss of active species and the like. For example, soluble cobalt salts in combination with peroxymonosulfate salts have been widely used in advanced oxidation processes for a range of organic waste waters. However, these cobalt salts are difficult to recycle due to their homogeneous phase characteristics, and cobalt ions themselves also cause pollution to water systems. Therefore, how to effectively solve the above problems, the development of high-efficiency and stable advanced oxidation catalytic materials remains an important challenge in this field.
Disclosure of Invention
The invention provides a cobalt-containing zeolite catalyst and a preparation method and application thereof according to the defects of the prior art, the cobalt-containing zeolite catalyst has the advantages of simple and mild reaction conditions, high-efficiency and rapid degradation activity, small catalyst dosage, high efficiency, wide range of applicable wastewater pollutants and wide range of applicable wastewater pH when in application.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a method for preparing a cobalt-containing zeolite catalyst comprises introducing any one of cobalt ions, metallic cobalt particles and cobalt oxide particles into a zeolite molecular sieve.
Preferably, the zeolite molecular sieve is any one or more of MFI, BEA, FAU, CHA, FER, MWW, MOR.
Preferably, the cobalt ions are incorporated into the zeolitic molecular sieve by means of ion exchange.
Preferably, the metallic cobalt particles are incorporated into the zeolite molecular sieve by in situ synthesis.
Preferably, the cobalt oxide particles are incorporated into the zeolite molecular sieve by means of impregnation.
The invention also discloses a cobalt-containing zeolite catalyst prepared by the preparation method.
The invention discloses an application of the cobalt-containing zeolite catalyst, wherein the cobalt-containing zeolite catalyst and an oxidant are mixed and added into wastewater containing organic pollutants, and the organic pollutants in the wastewater are degraded after the mixing reaction.
Preferably, the oxidizing agent is any one of sodium hydrogen peroxymonosulfate and potassium peroxymonosulfate.
Preferably, when the organic matter is degraded, the reaction temperature is 5-60 ℃, the reaction time is 2-600 minutes, the oscillation frequency is 50-250 rpm, and the dosage of the cobalt-containing zeolite catalyst is 1-500 mg/L.
The invention has the following characteristics and beneficial effects:
compared with the traditional organic framework cobalt material or soluble cobalt salt, the molecular sieve catalyst adopted in the method has the characteristics of higher reaction efficiency and better stability in the reaction of treating the organic pollutants in the wastewater.
The invention also aims to provide the application of the cobalt-based zeolite molecular sieve catalyst in the field of catalytic degradation of wastewater treatment.
The catalyst has the advantages of small using amount, high efficiency, wide range of applicable wastewater pollutants and wide range of applicable wastewater pH.
The catalyst has mild reaction conditions in the sewage degradation process, does not need other auxiliary equipment such as light, heat and the like, and can simultaneously realize low cost and high efficiency.
As a heterogeneous catalyst, the catalyst is easy to recycle, so that the catalyst has a great application prospect.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention provides a preparation method of a cobalt-containing zeolite catalyst.
Example 1
Cobalt ions are introduced into the zeolite molecular sieve with any structure of MFI, BEA, FAU, CHA, FER, MWW and MOR by means of ion exchange.
Example 2
The metallic cobalt particles are introduced into the zeolite molecular sieve with any structure of MFI, BEA, FAU, CHA, FER, MWW and MOR by means of in-situ synthesis.
Example 3
Cobalt oxide particles are introduced into the zeolite molecular sieve with any structure of MFI, BEA, FAU, CHA, FER, MWW and MOR by means of impregnation.
The preparation method of the cobalt-containing zeolite catalyst in the embodiment has the characteristics of simple process, low cost and easy popularization, and compared with the traditional organic framework cobalt material or soluble cobalt salt, the preparation method has the characteristics of higher reaction efficiency and better stability in the reaction of treating organic pollutants in wastewater.
The invention also discloses a cobalt-containing zeolite catalyst prepared by the preparation method, and the catalyst has the advantages of small using amount, high efficiency, wide range of applicable wastewater pollutants and wide range of applicable wastewater pH when in application.
The invention discloses an application of the cobalt-containing zeolite catalyst.
Example 4
Sodium hydrogen peroxymonosulfate and a Co-FAU molecular sieve catalyst are added into an acid Orange G (OG) solution with the pH value of 3, the concentration of organic matters is 0.3mM, the concentration of sodium hydrogen peroxymonosulfate in a reaction system is 2mM, the concentration of a cobalt-containing zeolite catalyst in the reaction system is 20mg/L, the reaction is carried out at the temperature of 25 ℃, and the reaction time is 90 min. After the reaction is finished, the degradation rate of organic matters in the system exceeds 90 percent.
Example 5
Adding potassium monopersulfate and a Co-MFI molecular sieve catalyst into OG solution with the pH value of 4, wherein the concentration of organic matters is 0.5mM, the concentration of potassium monopersulfate in a reaction system is 5mM, the concentration of a cobalt-containing zeolite catalyst in the reaction system is 20mg/L, and the reaction is carried out at the temperature of 50 ℃ for 90 min. After the reaction is finished, the degradation rate of organic matters in the system exceeds 98 percent.
Example 6
Adding potassium peroxymonosulfate and Co-BEA molecular sieve catalyst into OG solution with pH of 6, wherein the concentration of organic matters is 1.0mM, the concentration of potassium peroxymonosulfate in a reaction system is 6mM, the concentration of cobalt-containing zeolite catalyst in the reaction system is 30mg/L, and the reaction is carried out at 60 ℃ for 60 min. After the reaction is finished, the degradation rate of organic matters in the system exceeds 95 percent.
Example 7
Adding potassium monopersulfate and Co-CHA molecular sieve catalyst into OG solution with pH of 11, wherein the concentration of organic matter is 2.0mM, the concentration of potassium monopersulfate in the reaction system is 20mM, the concentration of cobalt-containing zeolite catalyst in the reaction system is 40mg/L, and the reaction is carried out at 50 ℃ for 30 min. After the reaction is finished, the degradation rate of organic matters in the system exceeds 92 percent.
Example 8
Adding sodium hydrogen peroxymonosulfate and a Co-MOR molecular sieve catalyst into an OG solution with the pH value of 5, wherein the concentration of organic matters is 0.1mM, the concentration of sodium hydrogen peroxymonosulfate in a reaction system is 10mM, the concentration of a cobalt-containing zeolite catalyst in the reaction system is 10mg/L, and the reaction is carried out at the temperature of 50 ℃ for 20 min. After the reaction is finished, the degradation rate of organic matters in the system exceeds 90 percent.
Example 9
Adding potassium monopersulfate and Co-MOR molecular sieve catalyst into OG solution with pH of 5, wherein the concentration of organic matters is 3.0mM, the concentration of potassium monopersulfate in a reaction system is 60mM, the concentration of cobalt-containing zeolite catalyst in the reaction system is 60mg/L, and the reaction is carried out at 50 ℃ for 30 min. After the reaction is finished, the degradation rate of organic matters in the system exceeds 94 percent.
Example 10
Adding sodium hydrogen peroxymonosulfate and Co-FER molecular sieve catalyst into OG solution with pH of 4, wherein the concentration of organic matter is 0.5mM, the concentration of sodium hydrogen peroxymonosulfate in a reaction system is 5mM, the concentration of cobalt-containing zeolite catalyst in the reaction system is 20mg/L, and the reaction is carried out at 5 ℃ for 60 min. After the reaction is finished, the degradation rate of organic matters in the system exceeds 90 percent.
Example 11
Adding sodium hydrogen peroxymonosulfate and a Co-MWW molecular sieve catalyst into OG solution with the pH value of 3, wherein the concentration of organic matters is 10.0mM, the concentration of sodium hydrogen peroxymonosulfate in a reaction system is 50.0mM, the concentration of a cobalt-containing zeolite catalyst in the reaction system is 70mg/L, and the reaction is carried out at the temperature of 40 ℃ for 20 min. After the reaction is finished, the degradation rate of organic matters in the system exceeds 90 percent.
Example 12
Filtering the Co-MWW molecular sieve catalyst after the reaction from a reaction system, adding new sodium peroxymonosulfate into OG solution with the pH value of 3, wherein the concentration of organic matters is 10.0mM, the concentration of the sodium peroxymonosulfate in the reaction system is 50.0mM, the concentration of the cobalt-containing zeolite catalyst in the reaction system is 70mg/L, and the reaction is carried out at the temperature of 40 ℃ for 20 min. After the reaction is finished, the degradation rate of organic matters in the system exceeds 90 percent, and the secondary recycling is proved, and the performance is not attenuated.
Example 13
Filtering the Co-MWW molecular sieve catalyst after reaction from a reaction system, adding new sodium peroxymonosulfate into OG solution with pH of 3, wherein the concentration of organic matters is 10.0mM, the concentration of sodium peroxymonosulfate in the reaction system is 50.0mM, the concentration of the cobalt-containing zeolite catalyst in the reaction system is 70mg/L, and the reaction is carried out at 40 ℃ for 20 min. The organic matter degradation rate in the system exceeds 90 percent after the 10 th cycle use according to the cycle use of the process, and the performance is proved to be not attenuated.
Comparative example 14
Adding sodium hydrogen peroxymonosulfate and cobalt chloride catalyst into OG solution with pH of 3, wherein the concentration of organic matter is 10.0mM, the concentration of sodium hydrogen peroxymonosulfate in the reaction system is 50.0mM, the concentration of cobalt-containing zeolite catalyst in the reaction system is 70mg/L, and the reaction is carried out at 40 ℃ for 20 min. After the reaction is finished, the degradation rate of organic matters in the system is 72 percent.
Comparative example 15
Sodium hydrogen peroxymonosulfate and commercial Co/Al2O3The (alumina supported Co) catalyst was added to the OG solution at pH 3, the concentration of organic matter was 10.0mM, the concentration of sodium hydrogen peroxymonosulfate in the reaction system was 50.0mM, the concentration of cobalt-containing zeolite catalyst in the reaction system was 70mg/L, the reaction was carried out at 40 ℃ for 20 min. After the reaction is finished, the degradation rate of organic matters in the system is 35%.
Comparative example 16
The commercial Co/Al after the reaction is added2O3The catalyst was filtered from the reaction system, and new sodium monopersulfate was added to the OG solution having a pH of 3, the concentration of organic matter was 10.0mM, the concentration of sodium monopersulfate in the reaction system was 50.0mM, the concentration of the cobalt-containing zeolite catalyst in the reaction system was 70mg/L, the reaction was carried out at 40 ℃ for 20 min. After the reaction is finished, the degradation rate of organic matters in the system is 28%, and the degradation rate proves that the organic matters are recycled for the second time, and the performance is obviously attenuated.
The embodiment shows that the catalyst has the advantages of small dosage, high efficiency, wide range of applicable wastewater pollutants and wide range of applicable wastewater pH, the reaction condition is mild in the sewage degradation process, other auxiliary equipment such as light and heat is not needed, and low cost and high efficiency can be realized at the same time. In addition, as a heterogeneous catalyst, the catalyst is easy to recycle, so that the catalyst has a great application prospect.
The above examples illustrate embodiments of the present invention in detail, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments, including the components, without departing from the principles and spirit of the invention, and still fall within the scope of the invention.

Claims (9)

1. A method for preparing a cobalt-containing zeolite catalyst, characterized in that any one of cobalt ions, metallic cobalt particles and cobalt oxide particles is introduced into a zeolite molecular sieve.
2. The method of claim 1, wherein the zeolite molecular sieve is any one or more of MFI, BEA, FAU, CHA, FER, MWW, and MOR.
3. The method of claim 1, wherein the cobalt ions are introduced into the zeolitic molecular sieve by ion exchange.
4. The method of claim 1, wherein the metallic cobalt particles are incorporated into the zeolitic molecular sieve by in situ synthesis.
5. The method of claim 1, wherein the cobalt oxide particles are incorporated into the zeolite molecular sieve by impregnation.
6. A cobalt-containing zeolite catalyst obtained by the production method according to any one of claims 1 to 5.
7. Use of a cobalt-containing zeolite catalyst according to claim 6, wherein the cobalt-containing zeolite catalyst and the oxidizing agent are mixed and added to the waste water containing organic pollutants, and the organic pollutants in the waste water are degraded after the mixing reaction.
8. Use of a cobalt-containing zeolite catalyst as claimed in claim 7 wherein the oxidant is any one of sodium hydrogen peroxymonosulfate and potassium peroxymonosulfate.
9. The application of the cobalt-containing zeolite catalyst according to claim 7, wherein the reaction temperature is 5-60 ℃, the reaction time is 2-600 minutes, the oscillation frequency is 50-250 rpm, and the dosage of the cobalt-containing zeolite catalyst is 1-500 mg/L.
CN202210420040.6A 2022-04-21 2022-04-21 Cobalt-containing zeolite catalyst and preparation method and application thereof Pending CN114669321A (en)

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