CN108745419B - Catalyst for catalyzing ozone to oxidize wastewater and preparation method thereof - Google Patents
Catalyst for catalyzing ozone to oxidize wastewater and preparation method thereof Download PDFInfo
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- CN108745419B CN108745419B CN201810820875.4A CN201810820875A CN108745419B CN 108745419 B CN108745419 B CN 108745419B CN 201810820875 A CN201810820875 A CN 201810820875A CN 108745419 B CN108745419 B CN 108745419B
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- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- B01J31/32—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of manganese, technetium or rhenium
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- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- B01J31/28—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of the platinum group metals, iron group metals or copper
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- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- B01J31/38—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of titanium, zirconium or hafnium
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- 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
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- 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
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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Abstract
The invention discloses a catalyst for catalyzing ozone to oxidize waste water and a preparation method thereof, which relate to the field of waste water treatment and comprise an inner core with a catalytic action and a shell with an anion blocking action, wherein the shell is wrapped outside the inner core, and the preparation method of the catalyst comprises the following steps: (1) preparing an inner core; (2) preparing a shell; (3) a primary catalyst; (4) drying; (5) and (4) crushing. According to the invention, the anion active agent has an anion repelling effect, and the shell added with the anion active agent can provide an environment with low local anion content, so that the active site (hydroxyl group) amount of the effective ozone catalyst with the catalytic inner core in the shell is increased, and the catalytic oxidation efficiency of ozone is further improved.
Description
Technical Field
The invention relates to the field of wastewater treatment, in particular to a catalyst for catalyzing ozone to oxidize wastewater and a preparation method thereof.
Background
The economic development of China for many years leads to the worry of the environmental condition and the increase of the environmental protection strength becomes a urgent affair. According to statistics of Chinese environmental condition bulletin in 2015, total discharge amount of chemical oxygen demand in 2015 is 2223.5 ten thousand tons, which is 12.9% lower than that in 2010, but discharge amount of waste water is still larger. The organic wastewater generally has the characteristics of high COD concentration, low BOD concentration, toxicity, more difficultly degraded substances and the like. If the organic pollutants are directly discharged, the water environment is seriously damaged, so that the economic and effective removal of the organic pollutants in water becomes a hotspot of research and engineering application of the current water treatment technology. Advanced oxidation technology (AOP) utilizes various active free radicals to attack organic matters, can effectively mineralize or convert toxic and nondegradable organic matters into low-toxicity and easily biodegradable micromolecular organic matters, and is highly valued by academia and industry. The technology mainly comprises a Fenton method, wet catalytic oxidation, photocatalysis, electrocatalysis, catalytic ozonation and the like. Wherein the Catalytic Ozonation (COP) has the advantage of being not limited by wastewater chromaticity, colloidal substances, high temperature, high pressure and pH conditions.
Ozone catalysisThe chemical oxidation technology is divided into homogeneous catalytic oxidation and heterogeneous catalytic oxidation. The mechanism of the homogeneous catalytic ozone oxidation method is as follows: by adding a liquid catalyst (such as H) into the ozone oxidation system2O2Soluble metal ions with catalytic capability) or light radiation (such as ultraviolet light) to catalyze the decomposition of ozone to generate hydroxyl radicals (OH) with higher active potential, and the heterogeneous catalytic oxidation easily causes secondary pollution of water. The catalyst used for heterogeneous catalytic oxidation is a solid phase, and the decomposition of organic matters in the wastewater is realized by a fixed bed gas-solid-liquid three-phase reaction by using a supported catalyst. The catalyst of the heterogeneous ozone catalysis technology is not easy to lose, can be repeatedly used, can not cause secondary pollution of water, and gradually becomes an industrial technology. For heterogeneous ozone catalytic oxidation technology, the performance of the catalyst is a key factor determining the wastewater treatment effect and the economy.
Hydroxyl groups on the surface of the metal oxide catalyst are reactive active sites, and the active sites perform ion exchange with anions and cations in water to release protons and hydroxyl groups into a solution, so that the anions and cations in the solution are adsorbed on the surface of the catalyst. The metal oxide catalyst without the load is limited in use due to the low specific surface area, easy leaching of active elements, large microcrystalline structure and the like, the catalytic degradation effect is not obvious, but the activity of the catalyst is not obviously affected by simply increasing the specific surface area of the catalyst.
Disclosure of Invention
The invention aims to: aiming at the problems, the invention provides a catalyst for catalyzing ozone to oxidize waste water and a preparation method thereof, and the invention improves the heterogeneous ozone catalytic oxidation efficiency.
The technical scheme adopted by the invention is as follows:
a catalyst for catalyzing ozone to oxidize waste water comprises an inner core with catalytic function and an outer shell with anion blocking function, wherein the outer shell is wrapped outside the inner core.
The invention comprises a shell with the function of repelling anions and an inner core with the function of catalysis, wherein the shell can provide an environment with lower local anion content for the inner core, so that the active site (hydroxyl group) amount of an effective ozone catalyst of the inner core with the function of catalysis in the shell is increased, and the catalytic oxidation efficiency of ozone is increased.
Furthermore, the composite material comprises, by weight, 25-35 parts of a core and 30-65 parts of a shell.
Furthermore, a plurality of pores are distributed on the surface of the shell, and the diameter of each pore is 10-100 nm.
The surface of the shell is provided with pores, so that wastewater can smoothly react with the core through the shell, the wastewater is prevented from being insufficiently contacted with the core, and the reaction efficiency is improved.
A preparation method of a catalyst for catalyzing ozone to oxidize wastewater comprises the following steps:
(1) preparation of the inner core: completely mixing activated carbon powder and a metal salt solution, and performing microwave heating in an inert gas environment until the water is evaporated to dryness to generate an inner core for later use;
(2) preparing the shell: mixing an anionic active agent, a bonding agent and a pore-forming agent to form a mixture for later use;
(3) primary catalyst: coating the mixture obtained in the step (2) on the surface of an inner core to form a primary catalyst for later use;
(4) and (3) drying: drying the primary catalyst obtained in the step (3) to obtain a secondary catalyst for later use;
(5) crushing: and crushing the secondary catalyst to obtain the finished catalyst.
Further, the metal salt solution in the step (1) comprises metal ions Ag+、Cu2+、Mn2+、Mg2+、Ni2+、Ti2+、Co2+ 、Fe3+One or more of (a) or (b).
Further, the concentration of the metal solution in the step (1) is 0.5-1.5 mol/L.
Further, the power of the microwave in the step (1) is 300-400W, and the heating time is 1-1.5 h.
Further, in the step (2), the anion active agent, the adhesive and the pore-forming agent are mixed according to a molar ratio of 8-15: 5-10: 2-3 of an additive.
Further, the anionic active agent in the step (2) is magnesium sulfonate, sodium alkyl benzene sulfonate, fatty acid methyl ester, and sodium oleoyloxyethylsulfonate.
Further, the drying technology adopted in the step (4) is ultrasonic drying or infrared drying.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, the anion active agent has an anion repelling effect, and the shell added with the anion active agent can provide an environment with low local anion content, so that the active site (hydroxyl group) amount of the effective ozone catalyst with the catalytic inner core in the shell is increased, and the catalytic oxidation efficiency of ozone is further improved.
2. The catalyst is used as the core, and the pore-forming agent is added into the preparation material of the shell, so that the wastewater can smoothly pass through the shell to react with the core, the insufficient contact between the wastewater and the core is avoided, and the reaction efficiency is improved.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Example 1
A catalyst for catalyzing ozone to oxidize wastewater is prepared according to the following steps:
(1) preparation of the inner core: mixing activated carbon powder with 0.5 mol/L Mn (NO)3)2The solution is mixed completely in N2Under the gas environment, microwave heating is carried out for 1h at the power of 400W, and an inner core is generated for standby application;
(2) preparing the shell: adding sodium alkyl benzene sulfonate, an adhesive of aluminum sol and a pore-forming agent of polyvinyl alcohol according to a molar ratio of 8:10:2, and mixing to form a mixture for later use;
(3) primary catalyst: mixing 30 parts of the mixture with 25 parts of the inner core according to the mass parts, and forming a shell on the surface of the inner core of the mixture to obtain a primary catalyst for later use;
(4) and (3) drying: drying the primary catalyst obtained in the step (3) by ultrasonic waves with the power of 200W for 5 hours to obtain a secondary catalyst for later use;
(5) crushing: and crushing the secondary catalyst to obtain a finished catalyst, wherein the particle size of the finished product is 1.5 mm.
The evaluation of the catalytic performance of the catalyst prepared in this example was carried out by:
waste water: TDS is 38400mg/L, COD is 600mg/L;
the adding amount of ozone is 500mg/L, and the reaction time is 1 h;
control (no catalyst): COD is 480mg/L, and the COD of the catalyst is 230 mg/L;
the COD removal rate is improved by 41.7 percent.
Example 2
The present embodiment provides an embodiment with different conditions from embodiment 1, specifically:
(1) preparation of the inner core: mixing activated carbon powder with 1 mol/L TiSO4The solution is mixed completely in N2Under the gas environment, microwave heating is carried out for 1.2h at the power of 350W, and an inner core is generated for standby application;
(2) preparing the shell: adding fatty acid methyl ester, a vinyl acetate resin adhesive and a carbon black pore-forming agent according to a molar ratio of 10:7:2.5 to form a mixture for later use;
(3) primary catalyst: mixing 48 parts of the mixture with 30 parts of the inner core according to the parts by mass, and forming a shell on the surface of the inner core of the mixture to obtain a primary catalyst for later use;
(4) and (3) drying: drying the primary catalyst obtained in the step (3) by ultrasonic waves with the power of 300W for 3 hours to obtain a secondary catalyst for later use;
(5) crushing: and crushing the secondary catalyst to obtain a finished catalyst, wherein the particle size of the finished product is 3 mm.
The evaluation of the catalytic performance of the catalyst prepared in this example was carried out by:
waste water: TDS is 46700mg/L, COD is 450mg/L;
the adding amount of ozone is 400mg/L, and the reaction time is 1 h;
control (no catalyst): COD is 320mg/L, and catalyst COD is 195 mg/L;
the COD removal rate is improved by 27.8 percent.
Example 3
The present embodiment provides an embodiment with different conditions from those of embodiments 1 and 2, specifically:
(1) preparation of the inner core: mixing activated carbon powder with 1.5mol/L Co SO4The solution is mixed completely in N2Under the gas environment, microwave heating is carried out for 1.5h at the power of 300W, and an inner core is generated for standby application;
(2) preparing the shell: adding magnesium sulfonate, a water adhesive and a pore-forming agent of polyethylene glycol according to a molar ratio of 15:5:3 to form a mixture for later use;
(3) primary catalyst: mixing 48 parts of the mixture with 30 parts of the inner core according to the parts by mass, and forming a shell on the surface of the inner core of the mixture to obtain a primary catalyst for later use;
(4) and (3) drying: drying the primary catalyst obtained in the step (3) in infrared rays with the power of 450W for 2 hours to obtain a secondary catalyst for later use;
(5) crushing: and crushing the secondary catalyst to obtain a finished catalyst, wherein the particle size of the finished product is 5 mm.
The evaluation of the catalytic performance of the catalyst prepared in this example was carried out by:
waste water: TDS is 57300mg/L, COD is 500mg/L;
the adding amount of ozone is 500mg/L, and the reaction time is 1 h;
control (no catalyst): the COD is 374mg/L, and the catalyst COD is 260 mg/L;
the COD removal rate is improved by 22.8 percent.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (9)
1. A catalyst for catalyzing ozone to oxidize wastewater is characterized by comprising an inner core with a catalytic function and an outer shell with an anion blocking function, wherein the outer shell is wrapped outside the inner core; the preparation method of the catalyst is characterized by comprising the following steps:
(1) preparation of the inner core: completely mixing activated carbon powder and a metal salt solution, and performing microwave heating in an inert gas environment until the water is evaporated to dryness to generate an inner core for later use;
(2) preparing the shell: mixing an anionic active agent, a bonding agent and a pore-forming agent to form a mixture for later use;
(3) primary catalyst: coating the mixture obtained in the step (2) on the surface of an inner core to form a primary catalyst for later use;
(4) and (3) drying: drying the primary catalyst obtained in the step (3) to obtain a secondary catalyst for later use;
(5) crushing: and crushing the secondary catalyst to obtain the finished catalyst.
2. The catalyst for catalyzing ozonated wastewater according to claim 1, comprising 25 to 35 parts by weight of an inner core and 30 to 65 parts by weight of an outer shell.
3. The catalyst for catalyzing ozone oxidation wastewater as claimed in claim 1, wherein a plurality of pores are distributed on the surface of the housing, and the diameter of the pores is 10-100 nm.
4. The catalyst for catalyzing ozonation wastewater according to claim 1, wherein the metal salt solution in the step (1) is a solution containing metal ions Ag+、Cu2+、Mn2+、Mg2+、Ni2+、Ti2+、Co2+、Fe3+One or more of (a) or (b).
5. The catalyst for catalyzing ozonation wastewater according to claim 1, wherein the concentration of the metal solution in the step (1) is 0.5 to 1.5 mol/L.
6. The catalyst for catalyzing ozone oxidation wastewater according to claim 1, wherein the microwave in the step (1) has a power of 300-400W and a heating time of 1-1.5 h.
7. The catalyst for catalyzing ozone oxidation wastewater as claimed in claim 1, wherein the anion active agent, the binder and the pore-forming agent in the step (2) are mixed according to a molar ratio of 8-15: 5-10: 2-3 of an additive.
8. The catalyst for catalyzing ozonated wastewater according to claim 7, wherein the anionic activator in the step (2) is magnesium sulfonate, sodium alkylbenzenesulfonate, fatty acid methyl ester, or sodium oleyloxyethanesulfonate.
9. The catalyst for catalyzing ozonation wastewater according to claim 1, wherein the drying technique used in the step (4) is ultrasonic drying or infrared drying.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3825400A (en) * | 1973-04-17 | 1974-07-23 | V Popov | Gas fuel blowpipe for burning reaction gas mixtures |
| CN102614840A (en) * | 2012-04-12 | 2012-08-01 | 南昌航空大学 | Preparation method for magnetic nano material for efficiently removing phosphate radicals and nitrates |
| CN105712466A (en) * | 2014-12-01 | 2016-06-29 | 抚顺环科石油化工技术开发有限公司 | Ozone catalytic wet oxidation method for phenol-containing waste water |
| CN105879676A (en) * | 2016-06-30 | 2016-08-24 | 李其忠 | Method for normal-temperature efficient catalytic degradation of VOCs waste gas of pesticide industry |
| CN106732792A (en) * | 2016-12-16 | 2017-05-31 | 煤炭科学技术研究院有限公司 | One kind treatment Coal Chemical Industry high-salt wastewater catalyst and preparation method thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3825400A (en) * | 1973-04-17 | 1974-07-23 | V Popov | Gas fuel blowpipe for burning reaction gas mixtures |
| CN102614840A (en) * | 2012-04-12 | 2012-08-01 | 南昌航空大学 | Preparation method for magnetic nano material for efficiently removing phosphate radicals and nitrates |
| CN105712466A (en) * | 2014-12-01 | 2016-06-29 | 抚顺环科石油化工技术开发有限公司 | Ozone catalytic wet oxidation method for phenol-containing waste water |
| CN105879676A (en) * | 2016-06-30 | 2016-08-24 | 李其忠 | Method for normal-temperature efficient catalytic degradation of VOCs waste gas of pesticide industry |
| CN106732792A (en) * | 2016-12-16 | 2017-05-31 | 煤炭科学技术研究院有限公司 | One kind treatment Coal Chemical Industry high-salt wastewater catalyst and preparation method thereof |
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