CN114602491B - Catalytic system and catalytic membrane for purifying benzol ketone VOCs gas at low temperature and preparation method thereof - Google Patents
Catalytic system and catalytic membrane for purifying benzol ketone VOCs gas at low temperature and preparation method thereof Download PDFInfo
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- 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
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention provides a catalytic system for purifying benzol ketone VOCs gas at low temperature, a catalytic membrane and a preparation method thereof, wherein the catalytic membrane comprises the following components: a washcoat formed by vapor deposition of a first oxide, and the first oxide is a basic oxide; and a catalytic layer formed on the washcoat layer by vapor deposition, wherein the catalytic layer comprises a second oxide, a third oxide and a fourth oxide, the second oxide and the fourth oxide are acidic oxides, and the third oxide is a basic oxide. The invention can solve the problems of low purification efficiency, potential safety hazard and narrow applicable concentration range of the common benzol ketone VOCs gas treatment method in the prior art.
Description
Technical Field
The invention relates to the technical field of volatile organic compound treatment, in particular to a catalytic system and a catalytic membrane for purifying benzol ketone VOCs gas at low temperature and a preparation method thereof.
Background
Volatile organic compounds (Volatile Organic Compounds, VOCs) are organic chemical substances with a vapor pressure of more than 0.1mmHg (13.3 Pa) and a boiling point of less than 260 ℃ (500°f) under normal conditions (20 ℃), have complex components, special odor and the characteristics of permeation, volatilization, liposolubility and the like, and have toxicity, irritation and teratogenic and carcinogenic effects, wherein benzene, toluene, xylene, formaldehyde and the like have the greatest harm to human health, and anemia and leukemia can be caused by long-term contact.
VOCs are mostly photochemically reactive, and under sunlight irradiation, VOCs can chemically react with NOx in the atmosphere to form secondary pollutants (such as ozone and the like) or intermediate products with strong chemical activity (such as free radicals and the like), so that the surface concentration of smoke and ozone is increased, life hazards can be caused to people, and meanwhile, the growth of crops can be endangered, and even death of the crops is caused. In addition to reducing visibility, the generated substances such as ozone, peroxyacetyl nitrate (PAN), peroxybenzoyl nitrate (PBN), aldehydes and the like can stimulate eyes and respiratory systems of people to damage the health of the people, and photochemical smog pollution events are continuously generated in cities such as London, tokyo and the like.
The treatment methods commonly used for the present benzol ketone VOCs include an absorption method, a condensation method, an adsorption method, a biological method, a thermal oxidation method, a photocatalysis method, a plasma method and the like, and electrochemical methods, membrane separation methods, an electron bed heating method and the like are being developed. However, the condensation method is suitable for treating high-concentration waste gas with recoverable value, and due to the limited recovery efficiency, the condensate gas at the tail end of the device can reach the discharge standard through secondary treatment. The condensation method, the absorption method and the adsorption method can not purify and decompose the benzol ketone VOCs per se, and all require secondary treatment. Biological methods are suitable for gases with henry coefficients less than 1 and are difficult to degrade contaminants that are relatively complex and chemically stable. The photooxidation and plasma process can produce a large amount of ozone while purifying the benzofuranones VOCs. Ozone is also included in the regulatory range of the environmental sector as the primary ozone depleting gas. In the technologies of thermal storage oxidation (RTO), direct combustion type incineration (TO), thermal storage catalytic oxidation (RCO) and catalytic Combustion (CO), the purification efficiency and airspeed are closely related TO the inlet air concentration, so that the efficiency is unstable under the condition of concentration fluctuation, and potential safety hazards exist. In addition, when RCO and CO catalyze the mixed polluted gas of benzene pollutants, aldehydes, ketones and short-chain fatty acids, the temperature of a catalytic chamber needs to be kept at 240 ℃ and above to reach emission standards, and the method is suitable for treating waste gas with medium and high concentration, and the purification efficiency of RCO and CO can be influenced by the too high or the too low concentration.
Disclosure of Invention
Aiming at the technical problems, the invention provides a catalytic system, a catalytic membrane and a preparation method thereof for purifying the benzol ketone VOCs gas at low temperature, so as to solve the problems of low purification efficiency, potential safety hazard and narrow applicable concentration range of the common benzol ketone VOCs treatment method in the prior art.
In order to achieve the above object, the present invention provides a catalytic membrane for purifying benzofuranone VOCs gas at low temperature, the catalytic membrane comprising: a washcoat formed by vapor deposition of a first oxide, and the first oxide is a basic oxide; and a catalytic layer formed on the washcoat layer by vapor deposition, wherein the catalytic layer comprises a second oxide, a third oxide and a fourth oxide, the second oxide and the fourth oxide are acidic oxides, and the third oxide is a basic oxide.
As an alternative technical scheme, the first oxide is selected from any one or a mixture of more of aluminum oxide, cerium oxide, beryllium oxide, calcium oxide, gallium oxide, lanthanum oxide, magnesium oxide, niobium pentoxide, praseodymium oxide, neodymium oxide, silicon dioxide, tantalum pentoxide, thorium oxide, titanium dioxide, zinc oxide and zirconium dioxide.
As an alternative technical scheme, the second oxide and the fourth oxide are selected from any one or a mixture of a plurality of manganese sesquioxide, manganese trioxide, chromium trioxide, molybdenum trioxide, nickel pentoxide, tungsten trioxide, manganese pentoxide, nickel dioxide and cobalt dioxide; the third oxide is selected from any one or more of lanthanum oxide, neodymium oxide, calcium oxide, praseodymium oxide, thorium oxide, zinc oxide, magnesium oxide, silicon dioxide, zirconium oxide, gallium oxide, beryllium oxide, titanium oxide, aluminum oxide and niobium pentoxide.
As an alternative technical scheme, the first oxide is a mixture composed of a plurality of oxides, and the weight percentage of one of the plurality of oxides is 10% -30%.
As an alternative technical scheme, the first oxide includes 40 parts of silicon dioxide, 12 parts of praseodymium oxide and 4 parts of zinc oxide.
As an alternative solution, the first oxide includes 25 parts of aluminum oxide, 5 parts of lanthanum oxide, 5 parts of calcium oxide, and 5 parts of cerium oxide.
As an alternative solution, the first oxide includes 25 parts of zirconium dioxide, 10 parts of titanium dioxide, 25 parts of neodymium oxide, 10 parts of magnesium oxide, and 30 parts of niobium pentoxide.
As an alternative technical solution, the weight ratio of the second oxide to the third oxide to the fourth oxide is 1:1:2 to 0.5:1.5:2.
as an alternative technical scheme, the composition of the catalytic layer comprises 5 parts of cobaltosic oxide, 5 parts of zirconium dioxide and 10 parts of manganese.
As an alternative technical scheme, the composition of the catalytic layer comprises 8 parts of molybdenum oxide, 20 parts of nickel oxide and 25 parts of chromium oxide.
The invention also provides a preparation method of the catalytic membrane for purifying the benzofuranone VOCs gas at low temperature, which comprises the following steps: evaporating the first oxide on the surface of the carrier to form the carrier coating; and evaporating the second oxide on the surface of the carrier coating layer away from the carrier to form the catalytic layer.
The invention also provides a catalytic system for purifying the benzol ketone VOCs gas at low temperature, which comprises a fan, a heating module and a catalytic module which are sequentially communicated, wherein a catalytic pipeline is arranged in the catalytic module, and the catalytic pipeline is filled with the catalytic film for purifying the benzol ketone VOCs gas at low temperature; the air inlet of the fan is used for leading the benzol ketone VOCs to enter the fan, the air outlet of the fan is used for leading the benzol ketone VOCs to enter the heating module, the air inlet of the fan is used for leading the air to enter the catalytic pipeline of the catalytic module after being preheated by the heating module, and the air is discharged from the outlet of the catalytic module after undergoing oxidation reaction with the catalytic film.
As an alternative technical scheme, the temperature of the catalytic pipeline is less than or equal to 180 ℃.
As an optional technical scheme, the catalytic system further comprises a control module, and the control module is respectively connected with the fan, the heating module and the catalytic module in a control mode.
Compared with the prior art, the catalytic membrane for purifying the benzol ketone VOCs gas at low temperature is provided, is applied to a catalytic system of the benzol ketone VOCs gas, can efficiently decompose benzene pollutants, aldehydes, ketones, short-chain fatty acids and other conventional VOCs at low temperature even below 80 ℃, has low energy consumption, saves energy, ensures safety, and is not limited by inlet air concentration. In addition, the invention has simple treatment process, simple equipment operation, stability, convenience and easy management through the operation of the control module.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a simplified schematic diagram of a catalytic system for low temperature purification of benzofuranone VOCs gas in accordance with the present invention.
Detailed Description
For a further understanding of the objects, construction, features, and functions of the invention, reference should be made to the following detailed description of the preferred embodiments.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The invention provides a catalytic film for purifying benzofuranone VOCs gas at low temperature, which comprises a carrier coating and a catalytic layer, wherein the carrier coating is formed by vapor deposition of a first oxide, for example, an alkaline oxide, namely, the first oxide is a metal oxide with alkalinity. The catalytic layer is formed on the carrier coating layer by vapor deposition, and the composition of the catalytic layer comprises a second oxide, a third oxide and a fourth oxide, wherein the second oxide and the fourth oxide are acidic oxides, namely the second oxide and the fourth oxide are acidic metal oxides or meta-acidic metal oxides, and the third oxide is basic oxide.
The vapor deposition method is, for example, an electron gun or a resistor vapor deposition method, and when the vapor deposition source is a plurality of oxides, a multi-source co-vapor deposition method is adopted.
In the catalytic membrane of the invention, the carrier coating is used as a base layer of the catalytic membrane, and the basic oxide is selected as the first oxide because the surface of the basic oxide has strong adsorption capacity on acid gas. In addition, the combination configuration of the metal oxides with different acid and alkali in the catalytic layer can improve the NO oxidizing capability and the stability of the NO oxidizing capability of the oxidation catalyst (DOC).
Wherein, for example, the first oxide is selected from, for example, aluminum oxide, cerium oxide, beryllium oxide, calcium oxide, gallium oxide, lanthanum oxide, magnesium oxide, niobium pentoxide, praseodymium oxide (Pr 6 O 11 ) Neodymium trioxide, silicon dioxide, tantalum pentoxide, thorium oxide (ThO) 2 ) Any one or a mixture of a plurality of titanium dioxide, zinc oxide and zirconium dioxide. Further, by measuring the volume adsorption amount and the heat adsorption amount of carbon dioxide with respect to each of the above basic oxides, the test results were as follows:
the volume adsorption capacity of the alkaline oxide to the acid gas is as follows: lanthanum trioxide > neodymium trioxide > calcium oxide > Pr 6 O 11 ＞ThO 2 Zinc oxide > magnesium oxide > silicon dioxide > zirconium oxide > gallium oxide > beryllium oxide > titanium oxide = aluminum oxide > niobium pentoxide;
the heat adsorption capacity of the alkaline oxide to the acid gas is as follows: calcium oxide > zinc oxide > neodymium trioxide > lanthanum trioxide > magnesium oxide > ThO 2 ＞Pr 6 O 11 Titanium oxide > aluminum oxide > zirconium oxide > beryllium oxide > gallium oxide > niobium pentoxide.
The second oxide and the fourth oxide are each selected from, for example, any one or more of manganese heptaoxide, manganese trioxide, chromium trioxide, molybdenum trioxide, nickel pentoxide, tungsten trioxide, manganese pentoxide, nickel dioxide, and cobalt dioxide. Further, by measuring the volume adsorption amount and the heat adsorption amount of ammonia gas with respect to each of the above-mentioned acidic oxides, the test results were as follows:
manganese oxide manganese trioxide chromium trioxide molybdenum trioxide nickel pentoxide tungsten trioxide manganese pentoxide nickel dioxide cobalt dioxide.
In addition, the third oxide may be the same as or different from the first oxide, and is also selected from, for example, any one or a mixture of more of lanthanum oxide, neodymium oxide, calcium oxide, praseodymium oxide, thorium oxide, zinc oxide, magnesium oxide, silicon dioxide, zirconium oxide, gallium oxide, beryllium oxide, titanium oxide, aluminum oxide, and niobium pentoxide.
In addition, considering the specific surface area and stability of the above oxides themselves in combination, it is preferable that the first oxide is a mixture composed of a plurality of oxides, and it is preferable that one of the plurality of oxides is 10 to 30% by weight.
In one embodiment, the first oxide includes, for example, 40 parts of silicon dioxide, 12 parts of praseodymium oxide, and 4 parts of zinc oxide.
In another embodiment, the first oxide includes, for example, 25 parts of aluminum oxide, 5 parts of lanthanum oxide, 5 parts of calcium oxide, and 5 parts of cerium oxide.
In yet another embodiment, the first oxide includes, for example, 25 parts of zirconium dioxide, 10 parts of titanium dioxide, 25 parts of neodymium oxide, 10 parts of magnesium oxide, and 30 parts of niobium pentoxide.
In one embodiment, the weight ratio of the second oxide to the third oxide to the fourth oxide is, for example, 1:1:2 to 0.5:1.5:2.
in one embodiment, the composition of the catalytic layer includes, for example, 5 parts of cobaltosic oxide, 5 parts of zirconium dioxide, and 10 parts of manganese.
In another embodiment, the composition of the catalytic layer includes 8 parts of molybdenum oxide, 20 parts of nickel oxide, and 25 parts of chromium oxide, for example.
In addition, the invention also provides a preparation method of the catalytic membrane for purifying the benzofuranone VOCs gas at low temperature, which comprises the following steps:
evaporating the first oxide on the surface of the carrier to form the carrier coating; and
evaporating the second oxide on the surface of the washcoat layer far from the carrier to form the catalytic layer.
Wherein the carrier is one or a combination of several of zeolite, electrospun nano-fiber, glass fiber, ceramic fiber, foam ceramic and alloy wire mesh.
The evaporation mode can be a multi-emission source co-evaporation ion reaction method, namely, the electron beam or laser evaporator and the resistance evaporator are provided with a plurality of ion generators and a plurality of air ducts, so that multi-material co-evaporation and multi-ion reaction combination are realized, and a target product can be quickly synthesized.
In addition, referring to fig. 1, fig. 1 is a simple schematic diagram of a catalytic system for purifying the benzofuranone VOCs gas at low temperature according to the present invention, and the catalytic system for purifying the benzofuranone VOCs gas at low temperature further includes a fan 1, a heating module 2 and a catalytic module 3 which are sequentially connected, wherein a catalytic pipeline is provided in the catalytic module 3, and a catalytic membrane for purifying the benzofuranone VOCs gas at low temperature as described above is filled in the catalytic pipeline; the benzol ketone VOCs gas enters the fan 1 from the air inlet 11 of the fan 1, enters the heating module 2 through the air outlet 12 of the fan 1, enters the catalytic pipeline of the catalytic module 3 after being preheated by the heating module 2, and is discharged from the outlet 31 of the catalytic module 3 after undergoing an oxidation reaction with a catalytic film in the catalytic pipeline.
That is, the benzol ketone VOCs gas is preheated by the heating module 2 and then enters the catalytic module 3, and when passing through the catalytic membrane, the benzol ketone VOCs gas contacts the catalytic membrane and is decomposed into water and carbon dioxide by oxidation reaction, so that the benzol ketone VOCs gas is treated.
The catalytic system does not limit the concentration of the benzol ketone VOCs gas, and the temperature of the catalytic pipeline is lower than or equal to 180 ℃ and even lower, so that the operation safety is improved.
In addition, the catalytic system may further include a control module that is respectively connected to the fan 1, the heating module 2, and the catalytic module 3 in a controlled manner. The control module adopts a PLC control module, the system is automatically controlled, the operation is simple, the important operation data can be monitored by matching with a human-computer interface, the whole catalytic treatment process is flexibly and accurately controlled, and the stability and the controllability of the whole process are improved.
In addition, the air inlet of fan intercommunication gas collecting channel, the gas collecting channel is used for concentrating and collects the gaseous VOCs of benzol ketone.
And an adsorption module can be arranged between the fan and the heating module, and adsorption substances such as activated carbon are placed in the adsorption module so as to adsorb dust in the benzol ketone VOCs gas.
The heating module can be internally provided with a heating plate or other heating elements and a temperature controller, and the temperature controller is used for controlling the temperature of the heating module.
The invention will be further illustrated with reference to specific examples.
Example 1
In the embodiment, a multi-emission source co-evaporation ion reaction method is adopted, and aluminum oxide (25 parts), lanthanum oxide (5 parts), calcium oxide (5 parts) and cerium oxide (5 parts) are put into an evaporation crucible to be co-evaporated to form a carrier coating of a catalytic film for purifying the benzol ketone VOCs gas at low temperature; molybdenum oxide (8 parts), nickel oxide (20 parts), and chromium oxide (25 parts) were put in a vapor deposition crucible and co-evaporated on the support coating to form a catalytic layer of a catalytic film for low-temperature purification of the anilinone type VOCs gas, thereby forming a catalytic film for low-temperature purification of the anilinone type VOCs gas of example 1.
The catalytic film for purifying the benzol ketone VOCs gas at low temperature formed in the embodiment is applied to the catalytic pipeline of the catalytic module of the catalytic system, the benzol ketone VOCs gas is introduced from the air inlet of the fan, and enters the catalytic module after passing through the fan and the heating module in sequence to perform oxidation reaction with the catalytic film in the catalytic pipeline, and then flows from the catalytic moduleThe outlet discharges. Wherein, the temperature in the catalytic pipeline: the concentration of the benzol ketone VOCs at the air inlet of the fan is 936mg/m at the temperature of 80-150 DEG C 3 After being treated by the catalytic system for purifying the benzol ketone VOCs gas at low temperature, the concentration of the benzol ketone VOCs at the outlet of the catalytic module is 6mg/m 3 The purification efficiency reaches 99.36 percent.
Example 2
In the embodiment, a multi-emission-source co-evaporation ion reaction method is adopted, and 40 parts of silicon dioxide, 12 parts of praseodymium oxide and 4 parts of zinc oxide are put into an evaporation crucible to be co-evaporated to form a carrier coating of a catalytic film for purifying the benzofuranone VOCs gas at a low temperature; 5 parts of tungsten trioxide, 15 parts of tantalum pentoxide and 20 parts of manganese oxide are put into an evaporation crucible and co-evaporated on a carrier coating to form a catalytic layer of a catalytic film for purifying the benzofuranone VOCs gas at low temperature, thereby forming the catalytic film for purifying the benzofuranone VOCs gas at low temperature of example 2.
The catalytic film for purifying the benzol ketone VOCs gas at low temperature formed in the embodiment is applied to the catalytic pipeline of the catalytic module of the catalytic system, the benzol ketone VOCs gas is introduced from the air inlet of the fan, and the benzol ketone VOCs gas sequentially passes through the fan and the heating module and then enters the catalytic module to perform oxidation reaction with the catalytic film in the catalytic pipeline and is discharged from the outlet of the catalytic module. Wherein, the temperature in the catalytic pipeline: the concentration of the benzol ketone VOCs at the air inlet of the fan is 969mg/m at 50-80 DEG C 3 After being treated by the catalytic system for purifying the benzol ketone VOCs gas at low temperature, the concentration of the benzol ketone VOCs at the outlet of the catalytic module is 177mg/m 3 The purifying efficiency reaches 81.73 percent.
Example 3
In the embodiment, a multi-emission source co-evaporation ion reaction method is adopted, and 25 parts of aluminum oxide, 5 parts of lanthanum oxide, 5 parts of calcium oxide and 5 parts of cerium oxide are put into an evaporation crucible to be co-evaporated to form a carrier coating of a catalytic film for purifying the benzol ketone VOCs gas at low temperature; 5 parts of cobaltosic oxide, 5 parts of zirconium dioxide and 10 parts of manganese oxide are put into an evaporation crucible and co-evaporated on a carrier coating to form a catalytic layer of a catalytic film for purifying the benzofuranone VOCs gas at low temperature, thereby forming the catalytic film for purifying the benzofuranone VOCs gas at low temperature of the embodiment 3.
The catalytic film for purifying the benzol ketone VOCs gas at low temperature formed in the embodiment is applied to the catalytic pipeline of the catalytic module of the catalytic system, the benzol ketone VOCs gas is introduced from the air inlet of the fan, and the benzol ketone VOCs gas sequentially passes through the fan and the heating module and then enters the catalytic module to perform oxidation reaction with the catalytic film in the catalytic pipeline and is discharged from the outlet of the catalytic module. Wherein, the temperature in the catalytic pipeline: at normal temperature, the concentration of the benzol ketone VOCs at the air inlet of the fan is 15mg/m 3 After being treated by the catalytic system for purifying the benzol ketone VOCs gas at low temperature, the concentration detection result of the benzol ketone VOCs at the outlet of the catalytic module is undetected, and the purification efficiency is even more than 99.99%.
As is apparent from the above examples, the catalytic system of the present invention has a high purification efficiency of the p-anilinone VOCs gas, even up to 99.99%, although the catalytic treatment temperature is not high (lower than 150 ℃).
In summary, the catalytic membrane for purifying the benzol ketone VOCs gas at low temperature is provided by the invention, is applied to a catalytic system of the benzol ketone VOCs gas, can efficiently decompose benzene pollutants, aldehydes, ketones, short-chain fatty acids and other conventional VOCs at low temperature even below 80 ℃, has low energy consumption, saves energy, ensures safety, and is not limited by inlet air concentration. In addition, the invention has simple treatment process, simple equipment operation, stability, convenience and easy management through the operation of the control module.
The invention has been described with respect to the above-described embodiments, however, the above-described embodiments are merely examples of practicing the invention. In addition, the technical features described above in the different embodiments of the present invention may be combined with each other as long as they do not collide with each other. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (9)
1. A catalytic membrane for low temperature purification of benzol ketone VOCs gas, said catalytic membrane comprising:
a washcoat formed by vapor deposition of a first oxide, and the first oxide is a basic oxide; and
the catalytic layer is formed on the carrier coating layer through evaporation, and the composition of the catalytic layer comprises a second oxide, a third oxide and a fourth oxide, wherein the second oxide and the fourth oxide are acidic oxides, and the third oxide is a basic oxide;
wherein the first oxide is a mixture composed of a plurality of oxides, and the weight percentage of one of the plurality of oxides is 10% -30%;
the weight ratio of the second oxide to the third oxide to the fourth oxide is 1:1:2 to 0.5:1.5:2.
2. the catalytic membrane for the low temperature purification of anilinone VOCs gas according to claim 1, wherein said first oxide is selected from the group consisting of any one or more of calcium oxide, lanthanum trioxide, magnesium oxide, praseodymium oxide, neodymium trioxide, thorium oxide, zirconium dioxide.
3. The catalytic membrane for the low temperature purification of anilinone VOCs gas according to claim 1, wherein the second oxide and the fourth oxide are each selected from any one or more of manganese heptaoxide, manganese trioxide, chromium trioxide, molybdenum trioxide, nickel pentoxide, tungsten trioxide, manganese pentoxide, nickel dioxide, cobalt dioxide; the third oxide is selected from any one or more of lanthanum oxide, neodymium oxide, calcium oxide, praseodymium oxide, thorium oxide, magnesium oxide, zirconium oxide and titanium oxide.
4. The catalytic membrane for the low temperature purification of benzodone VOCs gas according to claim 1, wherein the composition of the catalytic layer comprises 5 parts of tricobalt tetraoxide, 5 parts of zirconium dioxide, 10 parts of manganese.
5. The catalytic membrane for the low temperature purification of benzofuranone VOCs gas of claim 1 wherein the composition of the catalytic layer comprises 8 parts molybdenum oxide, 20 parts nickel oxide, 25 parts chromium oxide.
6. A method for preparing a catalytic membrane for low-temperature purification of benzofuranone VOCs gas according to any one of claims 1 to 5, said method comprising:
evaporating the first oxide on the surface of the carrier to form the carrier coating; and
evaporating the second oxide, the third oxide and the fourth oxide on the surface of the carrier coating layer, which is far away from the carrier, to form the catalytic layer.
7. A catalytic system for purifying the benzol ketone VOCs gas at low temperature, which is characterized by comprising a fan, a heating module and a catalytic module which are sequentially communicated, wherein a catalytic pipeline is arranged in the catalytic module, and the catalytic pipeline is filled with the catalytic film for purifying the benzol ketone VOCs gas at low temperature according to any one of claims 1-5;
the air inlet of the fan is used for leading the benzol ketone VOCs to enter the fan, the air outlet of the fan is used for leading the benzol ketone VOCs to enter the heating module, the air inlet of the fan is used for leading the air to enter the catalytic pipeline of the catalytic module after being preheated by the heating module, and the air is discharged from the outlet of the catalytic module after undergoing oxidation reaction with the catalytic film.
8. The catalytic system for the cryogenic purification of the benzofuranone VOCs gas of claim 7, wherein the catalytic conduit has a temperature less than or equal to 180 ℃.
9. The catalytic system for the low temperature purification of benzofuranone VOCs gas of claim 7, further comprising a control module, wherein the control module is in control connection with the blower, the heating module, and the catalytic module, respectively.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003093885A (en) * | 2001-09-25 | 2003-04-02 | Mazda Motor Corp | Catalyst for cleaning exhaust gas and manufacturing method therefor |
| CN1917950A (en) * | 2003-12-16 | 2007-02-21 | 开利公司 | Bifunctional layered photocatalyst/thermocatalyst for improving indoor air quality |
| CN101444634A (en) * | 2008-12-30 | 2009-06-03 | 中国科学院长春应用化学研究所 | Indoor air-purification device |
| CN105066148A (en) * | 2015-08-13 | 2015-11-18 | 中国石油化工股份有限公司 | Low-temperature heat accumulating type method for treating VOCs gas in catalytic oxidation manner |
| CN105289651A (en) * | 2015-10-21 | 2016-02-03 | 中国科学院过程工程研究所 | Bimetallic catalyst for catalytic oxidation of VOCs and preparation method and application of bimetallic catalyst |
| CN110075862A (en) * | 2019-06-04 | 2019-08-02 | 四川宝英胜达环保材料有限公司 | Compound non-noble metal oxide catalyst for catalytic combustion and preparation method thereof |
| CN113413895A (en) * | 2021-07-09 | 2021-09-21 | 苏州道一至诚纳米材料技术有限公司 | Production equipment and production method of thin film catalyst |
| CN214552542U (en) * | 2021-02-20 | 2021-11-02 | 苏州道一至诚纳米材料技术有限公司 | Combined type heat recovery system |
-
2022
- 2022-03-29 CN CN202210318811.0A patent/CN114602491B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003093885A (en) * | 2001-09-25 | 2003-04-02 | Mazda Motor Corp | Catalyst for cleaning exhaust gas and manufacturing method therefor |
| CN1917950A (en) * | 2003-12-16 | 2007-02-21 | 开利公司 | Bifunctional layered photocatalyst/thermocatalyst for improving indoor air quality |
| CN101444634A (en) * | 2008-12-30 | 2009-06-03 | 中国科学院长春应用化学研究所 | Indoor air-purification device |
| CN105066148A (en) * | 2015-08-13 | 2015-11-18 | 中国石油化工股份有限公司 | Low-temperature heat accumulating type method for treating VOCs gas in catalytic oxidation manner |
| CN105289651A (en) * | 2015-10-21 | 2016-02-03 | 中国科学院过程工程研究所 | Bimetallic catalyst for catalytic oxidation of VOCs and preparation method and application of bimetallic catalyst |
| CN110075862A (en) * | 2019-06-04 | 2019-08-02 | 四川宝英胜达环保材料有限公司 | Compound non-noble metal oxide catalyst for catalytic combustion and preparation method thereof |
| CN214552542U (en) * | 2021-02-20 | 2021-11-02 | 苏州道一至诚纳米材料技术有限公司 | Combined type heat recovery system |
| CN113413895A (en) * | 2021-07-09 | 2021-09-21 | 苏州道一至诚纳米材料技术有限公司 | Production equipment and production method of thin film catalyst |
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