CN114733512B - Novel molybdenum-tungsten oxide catalyst, device and method for degrading dimethyl sulfoxide by using novel molybdenum-tungsten oxide catalyst - Google Patents
Novel molybdenum-tungsten oxide catalyst, device and method for degrading dimethyl sulfoxide by using novel molybdenum-tungsten oxide catalyst Download PDFInfo
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Abstract
The invention provides a high-efficiency DMSO degradation method and a continuous DMSO degradation device based on a composite metal molybdenum tungsten oxide catalyst, which are used for preparing a composite metal molybdenum tungsten oxide solid-phase catalyst (MoO) through a simple process 3 ‑WO 3 X, wherein X is a carrier), the catalyst has excellent DSMO degradation activity and good recycling performance, and the continuous DMSO degradation device designed by the invention can reduce the addition amount of an oxidant in a wastewater treatment process, and can resist high-concentration DMSO wastewater, thereby promoting harmless emission of industrial DMSO wastewater.
Description
Technical Field
The invention relates to the technical field of industrial wastewater treatment, in particular to a method for catalyzing and degrading dimethyl sulfoxide by adopting novel molybdenum-tungsten oxide.
Background
Dimethyl sulfoxide (DMSO) has excellent thermal stability, chemical stability and excellent dissolution properties, and thus is widely used as an industrial solvent and a laboratory solvent. Currently, DMSO solvents are widely used in various industries such as thin film transistor liquid crystal displays, pharmaceutical, thin film and polymer manufacturing processes, and thus a large amount of industrial wastewater containing DMSO is generated. The biodegradation process of DMSO is very slow and the process can produce toxic and volatile contaminants such as dimethyl sulfide, methyl mercaptan, hydrogen sulfide, etc., so green pollution-free chemical degradation methods of DMSO must be developed.
Oxidative degradation of DMSO is an effective DMSO elimination method,wherein Fenton reaction degrades DMSO into methylsulfinate (CH) 3 SO 2 - ) Methanesulfonate (CH) 3 SO 3 - ) And Sulfate (SO) 4 2- ) Is the most commonly used method for removing DMSO in wastewater. UV/H 2 O 2 、 α-FeOOH/H 2 O 2 、TiO 2 Methods such as base photocatalyst/UV have also been used to remove DMSO, which is also oxidized to methylsulfinate, mesylate and sulfate. However, the above-mentioned DMSO degradation method is inefficient, for example, the concentration of DMSO in the wastewater treated by the above-mentioned method is not more than 5mmol/L, and an excessive amount of an oxidizing agent (usually H is required to be added 2 O 2 /DMSO>5 (mol/mol)), the waste water needs to be acidized, and iron sludge precipitation can be generated in the reaction. Furthermore, methanesulfonates are difficult to degrade further, and methylsulfinate and methanesulfonate are also environmental pollutants. These factors limit the application of the DMSO degradation method described above.
Aiming at the defects existing in the prior dimethyl sulfoxide degradation technology, the invention develops a high-efficiency DMSO degradation method and device based on a composite metal molybdenum tungsten oxide catalyst, and dioxygen water is used as an oxidant to oxidize DMSO into dimethyl sulfone (DMSO) which is naturally existing in organisms and can be biochemically degraded 2 ). The device can treat DMSO wastewater with concentration of up to 180mmol/L (namely 1.4wt percent), does not need to adjust the pH of the wastewater, and does not need excessive oxidant.
Disclosure of Invention
The invention aims to provide a high-efficiency DMSO degradation method and a continuous DMSO degradation device based on a composite metal molybdenum tungsten oxide catalyst, which are used for preparing a composite metal molybdenum tungsten oxide solid-phase catalyst (MoO) through a simple process 3 -WO 3 X, wherein X is a carrier), the catalyst has excellent DSMO degradation activity and good recycling performance, and the continuous DMSO degradation device designed by the invention can reduce the addition amount of an oxidant in a wastewater treatment process and can resist high-concentration DMSO wastewater, thereby promoting harmless emission of industrial DMSO wastewater.
In order to solve the technical problems, the invention provides a method for passingThe solid-phase supported catalyst for preparing dimethyl sulfone by degrading dimethyl sulfoxide through hydrogen oxide comprises an active metal oxide component and a carrier, wherein the active metal component is impregnated on the carrier by adopting an impregnation method, dried overnight, ground to below 80 meshes and calcined to obtain the catalyst MoO 3 -WO 3 X, X is a carrier.
The active metal oxide component is molybdenum oxide and tungsten oxide.
The adopted active metal component precursors are ammonium molybdate and ammonium metatungstate.
The catalyst MoO 3 -WO 3 MoO in/X 3 And WO 3 Preferably 1:2-2:1.
the support may be ZrO 2 、TiO 2 、Al 2 O 3 、SiO 2 One of ZSM-5 molecular sieves, most preferably SiO 2 。
The invention also provides a device for treating DMSO-containing wastewater by utilizing hydrogen peroxide, which comprises: hydrogen peroxide storage tank, water storage tank, DMSO waste water storage tank, preheater, blender, fixed bed catalytic reactor and collector.
The DMSO wastewater storage tank, the hydrogen peroxide storage tank and the water storage tank are respectively connected into corresponding pipelines in the preheater through pipelines, needle valves and constant flow pumps are arranged on the pipelines of the equipment connected to the preheater, three pipelines in the preheater are connected onto a mixer, a temperature controller is arranged on the preheater, the mixer is connected onto a fixed bed catalytic reactor through the pipelines, the fixed bed catalytic reactor is connected with the temperature controller, the fixed bed catalytic reactor is connected with a collector through the pipelines, and the needle valves are arranged on the pipelines.
The catalyst particles provided by the invention are filled in the middle of the fixed bed catalytic reactor, and the two ends of the fixed bed catalytic reactor are sealed by ceramic rings, so that the stability of the catalyst particles is ensured.
The invention also provides a method for treating industrial wastewater containing DMSO by adopting the device, which comprises the following steps:
firstly, diluting water, DMSO industrial wastewater and hydrogen peroxide solution are sent into a preheater for preheating;
secondly, sending all preheated liquids into a mixer for full mixing, then sending the mixture into a fixed bed catalytic reactor for oxidation and degradation reaction, and fully oxidizing DMSO by controlling the space time of the reaction liquid in the catalyst bed;
thirdly, the treated wastewater enters a collector.
The molar ratio of DMSO to added hydrogen peroxide in the industrial wastewater is preferably 1:1.2-2, further preferably 1:1.5.
the beneficial effects of the invention are that
1. The invention prepares the composite metal molybdenum tungsten oxide solid phase catalyst (MoO) by simple process 3 -WO 3 X, wherein X is a carrier), the catalyst has excellent DSMO degradation activity and good recycling performance;
2. the continuous DMSO degradation device designed by the invention can reduce the addition amount of the oxidant in the wastewater treatment process, and can resist high-concentration DMSO wastewater, thereby promoting harmless emission of industrial DMSO wastewater.
Drawings
FIG. 1 20% MoO 3 -20％WO 3 /SiO 2 Conversion of DMSO at 30 ℃ and DMSO of the catalyst 2 A time course of concentration; reaction conditions: 20% MoO 3 -20％WO 3 /SiO 2 (2.4 g/L), DMSO wastewater (178.6 mmol/L), H 2 O 2 (267.9 mmol/L), 30 ℃ and reaction time of 200min;
FIG. 2 is a graph of the reusability of molybdenum tungsten composite oxide catalysts; reaction conditions: 20% MoO 3 -20％WO 3 /SiO 2 (2.4 g/L), DMSO wastewater (178.6 mmol/L), H 2 O 2 (267.9 mmol/L), 30 ℃ and reaction time of 200min;
FIG. 3 optimal catalyst 20% MoO 3 -20％WO 3 /SiO 2 The performance was repeated at room temperature.
Detailed Description
The invention provides a solid-phase supported catalyst for preparing dimethyl sulfone by degrading dimethyl sulfoxide with hydrogen peroxide, which comprises an active metal component and a carrier, wherein the active metal component is a catalystSoaking the catalyst on a carrier by a soaking method, drying overnight, grinding to below 80 meshes, and calcining to obtain the catalyst MoO 3 -WO 3 X, X is a carrier.
The active metal component is metallic molybdenum Mo and metallic tungsten W.
The adopted active metal component precursors are ammonium molybdate and ammonium metatungstate.
The catalyst MoO 3 -WO 3 MoO in/X 3 And WO 3 Preferably 1:2-2:1, further preferably 1:1.
the support may be ZrO 2 、TiO 2 、Al 2 O 3 、SiO 2 One of ZSM-5 molecular sieves, most preferably SiO 2 。
The drying is preferably carried out overnight at 100℃to 120℃and more preferably at 110 ℃.
The calcination temperature is preferably 450 to 550 ℃, more preferably 500 ℃, and the calcination time is preferably 2 to 4 hours, more preferably 3 hours.
The invention also provides a device for treating DMSO-containing wastewater by utilizing hydrogen peroxide, which comprises: hydrogen peroxide storage tank, water storage tank, DMSO waste water storage tank, preheater, blender, fixed bed catalytic reactor and collector.
The DMSO wastewater storage tank, the hydrogen peroxide storage tank and the water storage tank are respectively connected into corresponding pipelines in the preheater through pipelines, needle valves and constant flow pumps are arranged on the pipelines of the equipment connected to the preheater, three pipelines in the preheater are connected onto a mixer, a temperature controller is arranged on the preheater, the mixer is connected onto a fixed bed catalytic reactor through the pipelines, the fixed bed catalytic reactor is connected with the temperature controller, the fixed bed catalytic reactor is connected with a collector through the pipelines, and the needle valves are arranged on the pipelines.
The catalyst particles provided by the invention are filled in the middle of the fixed bed catalytic reactor, and the two ends of the fixed bed catalytic reactor are sealed by ceramic rings, so that the stability of the catalyst particles is ensured.
The invention also provides a method for treating industrial wastewater containing DMSO by adopting the device, which comprises the following steps:
firstly, diluting water, DMSO industrial wastewater and hydrogen peroxide solution are sent into a preheater for preheating;
secondly, sending all preheated liquids into a mixer for full mixing, then sending the mixture into a fixed bed catalytic reactor for oxidation and degradation reaction, and fully oxidizing DMSO by controlling the space time of the reaction liquid in the catalyst bed;
thirdly, the treated wastewater enters a collector.
The molar ratio of DMSO to added hydrogen peroxide in the industrial wastewater is preferably 1:1.2-2, further preferably 1:1.5.
the addition amount of the solid supported catalyst is preferably 1-3g/L DMSO waste water, and further preferably 2.4g/L DMSO waste water.
The loading of molybdenum tungsten oxide in the solid supported catalyst is preferably 20wt% to 40wt%, and more preferably 40wt%.
The reaction temperature in the second step is preferably 40 ℃ to 60 ℃, more preferably 50 ℃, and the reaction time is preferably 1h to 3h, more preferably 2h.
The following examples are used to describe embodiments of the present invention in detail, thereby how the technical means are applied to solve the technical problems, and the implementation process for achieving the technical effects can be fully understood and implemented accordingly.
The invention relates to a device for treating DMSO in industrial wastewater, which is shown in FIG. 1, and comprises: a hydrogen peroxide storage tank 2, a water storage tank 3, a DMSO wastewater storage tank 1, a preheater 10, a mixer 12, a fixed bed catalytic reactor and a collector 18. The two ends of the fixed bed catalyst reactor are provided with porcelain rings 13, the inside of the fixed bed catalyst reactor is provided with a catalyst 14, the DMSO wastewater storage tank 1, the hydrogen peroxide storage tank 2 and the water storage tank 3 are respectively connected into corresponding pipelines in the preheater 10 through pipelines, the pipelines connected to the preheater by the equipment are respectively provided with needle valves 7, 8 and 9 and constant flow pumps 4, 5 and 6, three pipelines in the preheater are connected to a mixer 12, the preheater 10 is provided with a temperature controller 11, the mixer 12 is connected to the fixed bed catalyst reactor through a pipeline, the fixed bed catalyst reactor is connected with a temperature controller 15, the fixed bed catalyst reactor is connected with a collector 18 through a pipeline, and the pipelines are provided with needle valves 16 and 17.
Example 1: moO (MoO) 3 /SiO 2 Is synthesized by (a)
0.74g of ammonium molybdate was dissolved in a small amount of deionized water (7.3 mL), 1.4g of fumed silica was added with stirring to obtain a product, which was dried at 110℃for 12 hours, ground, sieved through a 80 mesh sieve, and calcined in a muffle furnace at 500℃for 3 hours at a heating rate of 5℃per minute to give 30% MoO 3 /SiO 2 And (3) powder.
DMSO catalytic degradation effect of supported molybdenum oxide catalyst
The supported molybdenum oxide catalysts with different carriers and different loadings were prepared by the same preparation method as in example 1 using high concentration DMSO sewage (178.6 mmol/L, i.e., 1.4 wt%) as a target pollutant, and the catalytic activity of the supported molybdenum oxide catalysts on DMSO degradation was examined, and the results are shown in table 1.
TABLE 1 conversion of DMSO and formation of DMSO under different reaction conditions 2 Concentration of (2)
Reaction conditions: catalyst (2.4 g/L), DMSO wastewater (178.6 mmol/L), H 2 O 2 (267.9 mmol/L), 50℃and 2h of reaction time.
In DMSO sewage treatment experiments, the addition amount of the catalyst is 2.4g/L, H 2 O 2 The molar ratio to DMSO was 1.5 and the reaction was carried out at 50 ℃. GC-MS analysis indicated that dimethyl sulfone was the only product of the DMSO oxidation reaction. To determine the most suitable support for molybdenum oxide, moO was used 3 Loaded on SiO 2 、ZrO 2 、ZSM-5Molecular sieve、TiO 2 And Al 2 O 3 And on an equal carrier, and examining the catalysis of the DMSO degradation reaction. As shown in Table 1, when MoO 3 Load on different loadsIn vivo, the activity of the catalysts varies greatly, and after 2 hours of reaction at 50 ℃, the conversion of DMSO is between 28.9% and 56.5%, the activity follows the following sequence: moO (MoO) 3 /TiO 2 <MoO 3 /Al 2 O 3 <MoO 3 /ZSM-5<MoO 3 /ZrO 2 <MoO 3 /SiO 2 . Silica is therefore the most suitable support for molybdenum oxide.
SiO-based 2 Vector, further examine MoO 3 Effect of loading on DMSO degradation reaction. Limited by the solubility of the catalyst precursor ammonium molybdate, moO examined 3 /SiO 2 The loading of the catalyst is between 5 and 30 wt%. As shown in Table 1, with MoO 3 In SiO 2 The loading increased from 5% to 30%, the conversion of DMSO increased rapidly from 30.3% to 100%, and the reason for the increase in catalyst activity was mainly that the number of active sites increased with the increase in loading.
In the aforementioned DMSO degradation reaction, as the DMSO conversion rate increases, its degradation product DMSO 2 The concentration of (2) also increases.
Furthermore, in the blank reaction of DMSO wastewater with hydrogen peroxide at 50 ℃ for 2 hours without catalyst, the DMSO conversion is only 6.1%, which is far lower than 100% of the catalytic reaction, and the reaction does not produce DMSO 2 . Thus, the catalyst is necessary for DMSO degradation.
Example 2: WO (WO) 3 /SiO 2 Is synthesized by (a)
Dissolving 0.80g of ammonium metatungstate in a small amount of deionized water (11.75 mL), adding 2.25g of fumed silica under stirring, drying the obtained product at 110 ℃ for 12 hours, grinding and sieving, and calcining in a muffle furnace at 500 ℃ for 3 hours, wherein the temperature rising rate is 5 ℃/min, thereby obtaining 25% of WO 3 /SiO 2 And (3) powder.
DMSO catalytic degradation effect of tungsten-loaded catalyst
The same preparation method as in example 2 was used to prepare supported molybdenum catalysts with different amounts and different loadings by using high concentration DMSO wastewater (178.6 mmol/L, i.e., 1.4 wt%) as the target contaminant, and examinedLoad(s)OxidationThe catalytic activity of the tungsten catalyst on DMSO degradation was as shown in table 2.
TABLE 2 conversion of DMSO and formation of DMSO under different reaction conditions 2 Concentration of (2)
Reaction conditions: catalyst (2.4 g/L), DMSO wastewater (178.6 mmol/L), H 2 O 2 (267.9 mmol/L), 50℃and 2h of reaction time.
In the DMSO sewage treatment experiment, the addition amount of the catalyst is still 2.4g/L, H 2 O 2 The molar ratio to DMSO was 1.5 and the reaction was carried out at 50 ℃. In this reaction, dimethyl sulfone is still the only product of oxidative degradation of DMSO. WO is incorporated into 3 Loaded on SiO 2 、ZrO 2 ZSM-5 molecular sieve, tiO 2 And Al 2 O 3 And the like, and investigating the activity of the obtained catalyst on DMSO degradation reaction. As shown in Table 2, vector pair WO 3 The activity effect of (2) is very pronounced, the conversion of DMSO is between 19.5% and 46.0% after 2 hours of reaction at 50℃and the activity follows the following sequence: WO (WO) 3 /TiO 2 <WO 3 /ZSM-5<WO 3 /ZrO 2 <WO 3 /Al 2 O 3 <WO 3 /SiO 2 This sequence is different from the activity sequence of the supported molybdenum oxide catalyst, and is described in WO 3 、 MoO 3 Different from the interaction with the carrier. 10wt% WO 3 /Al 2 O 3 And 10wt% of WO 3 /SiO 2 The conversion rate of the treated DMSO wastewater is 45.7% and 46.0%, respectively, and silicon dioxide is slightly better than aluminum oxide.
SiO-based 2 Vectors, further examined WO 3 Effect of loading on DMSO degradation reaction. Limited by the solubility of the catalyst precursor ammonium metatungstate, WO under investigation 3 /SiO 2 The loading of the catalyst is between 5 and 25 wt%. As shown in Table 2, following WO 3 In SiO 2 The loading increased from 5% to 25%, the DMSO conversion increased continuously from 44.4% to 72.2%, and the reason for the increase in catalyst activity was mainly that the number of active sites increased with the increase in loading.
In all the DMSO degradation reactions catalyzed by the loaded tungsten oxide, as the DMSO conversion rate increases, the degradation product DMSO thereof 2 The concentration of (2) also increases.
Example 3: moO (MoO) 3 -WO 3 /SiO 2 Is synthesized by (a)
Dissolving 0.74g ammonium molybdate and 0.64g ammonium metatungstate in a small amount of deionized water (9.4 mL), adding 1.8g fumed silica under stirring, drying the obtained product at 110deg.C for 12h, grinding, sieving with 80 mesh sieve, and calcining in a muffle furnace at 500deg.C for 3 hr at a heating rate of 5deg.C/min to obtain 20% MoO 3 -20％WO 3 /-SiO 2 And (3) powder.
DMSO catalytic degradation effect of molybdenum-tungsten composite oxide catalyst
The combination of different active components can change the geometric effect and the electronic effect of the catalyst, thereby remarkably improving the activity of the catalyst. Based on the high catalytic activity of the supported molybdenum oxide and tungsten oxide catalyst on DMSO degradation reaction, moO is further studied 3 -WO 3 The catalyst was prepared by the same preparation method as in example 3.
TABLE 3 conversion of DMSO and formation of DMSO under different reaction conditions 2 Concentration of (2)
| Sequence number | Catalyst | DMSO conversion (%) | DMSO 2 Concentration (mmol/L) |
| 1 | 30wt％MoO 3 /SiO 2 | 46.2 | 68.2 |
| 2 | 25wt％WO 3 /SiO 2 | 17.2 | 18.6 |
| 3 | 5％MoO 3 -25％WO 3 /SiO 2 | 40.5 | 69.2 |
| 4 | 10％MoO 3 -20％WO 3 /SiO 2 | 62.2 | 109.1 |
| 5 | 15％MoO 3 -15％WO 3 /SiO 2 | 86.3 | 145.7 |
| 6 | 20％MoO 3 -10％WO 3 /SiO 2 | 78.3 | 137.4 |
| 7 | 25％MoO 3 -5％WO 3 /SiO 2 | 55.6 | 90.9 |
| 8 | 5％MoO 3 -5％WO 3 /SiO 2 | 45.4 | 76.5 |
| 9 | 10％MoO 3 -10％WO 3 /SiO 2 | 70.5 | 119.7 |
| 10 | 20％MoO 3 -20％WO 3 /SiO 2 | 100 | 177.1 |
Reaction conditions: catalyst (2.4 g/L), DMSO wastewater (178.6 mmol/L), H 2 O 2 (267.9 mmol/L), 50℃and 20min.
First examine MoO 3 And WO 3 The MoO is prepared by adjusting the proportion of ammonium molybdate to ammonium metatungstate in the solution used in the impregnation method 3 And WO 3 The total loading was 30wt% of the composite catalyst. The catalyst is applied to DMSO degradation reaction, and the addition amount of the catalyst is 2.4g/L, H 2 O 2 The molar ratio with DMSO was 1.5 and the reaction was carried out at 50℃for 20 minutes. As can be seen from Table 3, when MoO 3 The content of (2) is increased from 5% to 25% (WO) 3 The content is correspondingly made from25% reduced to 5%), the DMSO conversion increased from 40.5% to 86.3%, and then continued to decrease to 55.6%. MoO (MoO) 3 And WO 3 After the two active components are jointly supported on the silicon oxide, the activity of the catalyst is obviously higher than that of a single-component catalyst. MoO (MoO) 3 And WO 3 The optimum ratio of (2) is 1:1, the DMSO conversion is 86.3%, and DMSO is produced 2 The concentration was 145.7mmol/L.
For MoO 3 And WO3 in an optimum ratio of 1:1, catalysts having different active component contents were prepared and their activities under the aforementioned reaction conditions were examined. As shown in Table 3, with MoO 3 And WO 3 The conversion of DMSO increased rapidly from 45.4% to 100% with a 5% to 20% increase in content.
In view of 20% MoO 3 -20％WO 3 /SiO 2 The catalyst has high catalytic activity on DMSO degradation reaction, and the reaction performance and stability of the catalyst at room temperature are continuously examined later.
Room temperature activity of molybdenum tungsten composite oxide catalyst
The DMSO wastewater degradation reaction is carried out at 50 ℃, however, the actual situation is that the industrial wastewater yield is large, and heating a large amount of wastewater from room temperature to 50 ℃ not only causes huge energy consumption but also has potential safety hazard, so that the room temperature activity of the catalyst is important. This section examined 20% MoO 3 -20％WO 3 /SiO 2 The activity of the chemosing agent is at 30 ℃.
As shown in FIG. 2, 20% MoO at 30 ℃C 3 -20％WO 3 /SiO 2 The catalyst still has higher catalytic activity, and the DMSO conversion rate is rapidly increased to 90.1% within 0-80 minutes; after that, the conversion rate rose relatively slowly, and after 200 minutes, the DMSO conversion rate reached 99.7%, and the DMSO was essentially completely degraded. On the other hand, DMSO 2 The concentration of (2) gradually increases along with the reaction time, and the increasing trend is basically consistent with the DMSO conversion rate, which indicates that DMSO is quantitatively degraded into DMSO 2 。
Repeated use effect of molybdenum-tungsten composite oxide catalyst
Industrial catalysts require high stability in addition to high activity, so the reusability of the catalyst is also an important performance index.
20% MoO for the best catalyst previously screened 3 -20％WO 3 /SiO 2 The reusability of the catalyst was examined at room temperature, and the catalyst after the reaction was directly used for the subsequent reaction by filtration and drying, and the result was shown in fig. 3. Under the reaction condition of 30 ℃ and 200 minutes, after the catalyst is used for 8 times, the DMSO conversion rate of the catalyst is slightly reduced from 99.7 percent of the first time to 96.5 percent of the eighth time, and the overall change is small, so that the catalyst can meet the industrial use requirement. Furthermore, DMSO degradation products DMSO 2 The concentration of (2) correspondingly decreases slightly.
All of the above-described primary implementations of this intellectual property are not intended to limit other forms of implementing this new product and/or new method. Those skilled in the art will utilize this important information and the above modifications to achieve a similar implementation. However, all modifications or adaptations belong to the reserved rights based on the new products of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention in any way, and any person skilled in the art may make modifications or alterations to the above disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (5)
1. The method for degrading dimethyl sulfoxide by activating hydrogen peroxide with a molybdenum-tungsten oxide-loaded catalyst is characterized in that the molybdenum-tungsten oxide-loaded catalyst consists of an active metal oxide and a carrier, wherein an active metal oxide component is immersed on the carrier by an immersion method, dried overnight, ground and calcined to obtain the MoO catalyst 3 -WO 3 And X are carriers, and are characterized in that:
firstly, diluting water, DMSO industrial wastewater and hydrogen peroxide solution are sent into a preheater for preheating;
and secondly, sending the preheated liquids into a mixer for full mixing, and then sending the mixture into a fixed bed catalytic reactor, wherein the fixed bed catalytic reactor is filled with the supported catalyst for oxidative degradation reaction, and fully oxidizing DMSO by controlling the empty time of the reaction liquid in a catalyst bed.
2. The method for degrading dimethyl sulfoxide by activating hydrogen peroxide with a molybdenum-tungsten oxide-loaded catalyst according to claim 1, wherein the method comprises the following steps: the adopted active metal oxide component precursors are ammonium molybdate and ammonium metatungstate.
3. The method for degrading dimethyl sulfoxide by activating hydrogen peroxide with a molybdenum-tungsten oxide-loaded catalyst according to claim 1 or 2, wherein the method comprises the following steps of: the catalyst MoO 3 -WO 3 MoO in/X 3 And WO 3 The mass ratio of (2) is 1:2-2:1.
4. the method for degrading dimethyl sulfoxide by activating hydrogen peroxide with a molybdenum-tungsten oxide-loaded catalyst according to claim 1 or 2, wherein the method comprises the following steps of: the carrier is ZrO 2 、TiO 2 、Al 2 O 3 、SiO 2 One of ZSM-5 molecular sieves.
5. The method for degrading dimethyl sulfoxide by activating hydrogen peroxide with a molybdenum-tungsten oxide-loaded catalyst according to claim 1 or 2, wherein the method comprises the following steps of: the molar ratio of DMSO to added hydrogen peroxide in the industrial wastewater is 1:1.2-2.
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