CN114433157A - Urea microwave hydrolysis catalyst and preparation method thereof - Google Patents
Urea microwave hydrolysis catalyst and preparation method thereof Download PDFInfo
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- CN114433157A CN114433157A CN202011197722.2A CN202011197722A CN114433157A CN 114433157 A CN114433157 A CN 114433157A CN 202011197722 A CN202011197722 A CN 202011197722A CN 114433157 A CN114433157 A CN 114433157A
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- 239000003054 catalyst Substances 0.000 title claims abstract description 243
- 230000007062 hydrolysis Effects 0.000 title claims abstract description 87
- 238000006460 hydrolysis reaction Methods 0.000 title claims abstract description 87
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 239000004202 carbamide Substances 0.000 title claims abstract description 86
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000002002 slurry Substances 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims description 34
- 239000000758 substrate Substances 0.000 claims description 31
- 239000013354 porous framework Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 25
- 239000011358 absorbing material Substances 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 17
- 238000004140 cleaning Methods 0.000 claims description 14
- 239000005416 organic matter Substances 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 229910044991 metal oxide Inorganic materials 0.000 claims description 5
- 150000004706 metal oxides Chemical class 0.000 claims description 5
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 5
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- 238000005245 sintering Methods 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 15
- 238000000197 pyrolysis Methods 0.000 abstract description 12
- 239000002994 raw material Substances 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 7
- 229910021529 ammonia Inorganic materials 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 230000004913 activation Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
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- 239000003814 drug Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004537 pulping Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical group [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/20—Carbon compounds
- B01J27/22—Carbides
- B01J27/224—Silicon carbide
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/40—Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
-
- 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
- B01J37/0215—Coating
- B01J37/0221—Coating of particles
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/08—Preparation of ammonia from nitrogenous organic substances
- C01C1/086—Preparation of ammonia from nitrogenous organic substances from urea
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
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Abstract
The invention provides a urea microwave hydrolysis catalyst and a preparation method thereof, belonging to the technical field of catalyst preparation, wherein the urea microwave hydrolysis catalyst comprises the following components: a porous skeletal catalyst module and a cover layer; wherein the cover layer is bonded to the surface of the porous skeletal catalyst module in the form of a slurry: the urea microwave hydrolysis catalyst has the advantages that the urea pyrolysis efficiency is ten times higher than that of the urea pyrolysis efficiency in the absence of the catalyst, the raw materials are simple and easy to realize, the hydrolysis efficiency is high, the energy consumption is low, the urea pyrolysis efficiency can be greatly improved, the urea microwave hydrolysis catalyst can also be used for preparing ammonia gas by microwave hydrolysis of urea, and therefore the efficiency and the reliability for preparing ammonia gas are greatly improved.
Description
Technical Field
The invention belongs to the technical field of catalyst preparation, and relates to but is not limited to a urea microwave hydrolysis catalyst and a preparation method thereof.
Background
It is known that ammonia gas can be used not only as a raw material for other chemical fertilizers such as nitric acid and urea, but also as a raw material for medicines and agricultural chemicals, and that a hydrolysis catalyst is often used in the production of these raw materials. Therefore, people are more and more concerned about how to prepare the hydrolysis catalyst with high efficiency.
The existing hydrolysis catalyst is prepared by pressing graphite powder, copper powder, nickel powder, titanium powder, manganese powder and boron powder into blocks under the conditions of high pressure, high temperature and air isolation, wherein the blocks are the hydrolysis catalyst.
However, the existing hydrolysis catalyst requires not only various powders but also high environmental requirements in preparation, resulting in low preparation efficiency of the hydrolysis catalyst.
Disclosure of Invention
The invention aims to provide a urea microwave hydrolysis catalyst and a preparation method thereof aiming at the defects of the existing hydrolysis catalyst in the preparation process, so as to solve the problem that the existing hydrolysis catalyst not only needs various powders during preparation, but also has high requirements on environmental conditions, so that the preparation efficiency of the hydrolysis catalyst is low.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:
in a first aspect, the present invention provides a urea microwave hydrolysis catalyst, comprising: a porous skeletal catalyst module and a cover layer; wherein the cover layer is bonded to the surface of the porous skeletal catalyst module in the form of a slurry.
Optionally, the porous framework catalyst module is a porous framework module made of a non-microwave-absorbing material, and the covering layer includes a granular catalyst made of a microwave-absorbing material.
Optionally, the porous framework catalyst module comprises a porous alumina framework module, a porous silica framework module and/or a porous titania framework module.
Optionally, the particulate catalyst made of microwave absorbing material comprises metal oxide particles, silicon carbide particles and/or graphite particles.
Optionally, the particle diameter of the particle catalyst is 20nm-20 um.
In a second aspect, the invention provides a method for preparing a urea microwave hydrolysis catalyst, which comprises the following steps:
obtaining a particulate catalyst and a porous catalyst substrate; wherein the particulate catalyst is a particle made of microwave absorbing material;
carrying out organic matter removal treatment on the porous catalyst substrate to obtain a porous framework catalyst module;
treating the particulate catalyst into an overlayer;
and carrying out bonding treatment on the covering layer on the surface of the porous framework catalyst module to obtain the urea microwave hydrolysis catalyst.
Optionally, it is right porous catalyst base carries out the organic matter and removes the processing, obtains porous skeleton catalyst module, includes:
determining a target cleaning solution;
and carrying out ultrasonic cleaning treatment on the porous catalyst substrate by using the target cleaning solution to obtain the porous framework catalyst module.
Optionally, the obtaining a particulate catalyst comprises:
obtaining a powder catalyst;
and carrying out gel sol treatment on the powder catalyst to obtain the granular catalyst.
Optionally, the performing gel sol treatment on the powder catalyst to obtain the particle catalyst includes:
and sintering and activating the powder catalyst to obtain the granular catalyst.
Optionally, the surface of the porous framework catalyst module is subjected to bonding treatment of the covering layer to obtain the urea microwave hydrolysis catalyst, which includes:
and soaking the covering layer into the surface of the porous framework catalyst module, and then drying to obtain the urea microwave hydrolysis catalyst.
The invention has the beneficial effects that: the invention relates to a urea microwave hydrolysis catalyst and a preparation method thereof, wherein the urea microwave hydrolysis catalyst comprises the following components: a porous skeletal catalyst module and a cover layer; wherein the cover layer is bonded to the surface of the porous skeletal catalyst module in the form of a slurry: the urea microwave hydrolysis catalyst has the advantages that the urea pyrolysis efficiency is ten times higher than that of the urea microwave hydrolysis catalyst without the catalyst, and the process is simple and easy to realize. The invention provides a preparation method of a urea microwave hydrolysis catalyst, which comprises the following steps: obtaining a particulate catalyst and a porous catalyst substrate; wherein the particulate catalyst is a particle made of microwave absorbing material; carrying out organic matter removal treatment on the porous catalyst substrate to obtain a porous framework catalyst module; treating the particulate catalyst into an overlayer; and carrying out bonding treatment on the covering layer on the surface of the porous framework catalyst module to obtain the urea microwave hydrolysis catalyst. Namely, the process for preparing the urea microwave hydrolysis catalyst by using the method is simple and easy to operate, the raw materials are simple, the hydrolysis efficiency is high, the energy consumption is low, the pyrolysis efficiency of urea can be greatly improved by using the urea microwave hydrolysis catalyst, and the urea microwave hydrolysis catalyst can also be used for preparing ammonia by microwave hydrolysis of urea, so that the high efficiency and the reliability for preparing ammonia are greatly improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a microwave urea hydrolysis catalyst according to an embodiment of the present invention;
FIG. 2 is a graph of urea pyrolysis efficiency versus microwave power provided by another embodiment of the present invention;
FIG. 3 is a schematic flow chart of a method for preparing a microwave urea hydrolysis catalyst according to another embodiment of the present invention;
FIG. 4 is a schematic view of an apparatus for preparing a microwave urea hydrolysis catalyst according to another embodiment of the present invention;
fig. 5 is a schematic view of another apparatus for controlling the microwave hydrolysis of urea according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The terms to which the present invention relates will be explained first:
gel sol method: the sol-gel method is that a compound containing high chemical activity components is used as a precursor, the raw materials are uniformly mixed in a liquid phase, hydrolysis and condensation chemical reactions are carried out, a stable transparent sol system is formed in a solution, sol is slowly polymerized among aged colloidal particles to form gel with a three-dimensional network structure, and the gel network is filled with a solvent losing fluidity to form gel. The gel is dried, sintered and solidified to prepare the material with molecular or even nano substructure.
Ultrasonic wave: the ultrasonic wave is a sound wave with frequency higher than 20000Hz, and it has good directivity, strong reflection capability, easy to obtain more concentrated sound energy, and the propagation distance in water is far longer than that in air, and it can be used for distance measurement, speed measurement, cleaning, welding, breaking stone, sterilization, etc. The method has a plurality of applications in medicine, military, industry and agriculture. Ultrasound is named because its lower frequency limit exceeds the upper human hearing limit.
FIG. 1 is a schematic diagram of a microwave urea hydrolysis catalyst according to an embodiment of the present invention; FIG. 2 is a graph of urea pyrolysis efficiency versus microwave power provided by another embodiment of the present invention; FIG. 3 is a schematic flow chart of a method for preparing a microwave urea hydrolysis catalyst according to another embodiment of the present invention; FIG. 4 is a schematic view of an apparatus for preparing a microwave urea hydrolysis catalyst according to another embodiment of the present invention; fig. 5 is a schematic view of another apparatus for controlling the microwave hydrolysis of urea according to another embodiment of the present invention. The urea microwave hydrolysis catalyst and the preparation method thereof provided by the embodiment of the invention will be described in detail below with reference to fig. 1 to 5.
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the urea microwave hydrolysis catalyst provided by the embodiment of the present invention may include: a porous skeletal catalyst module 1 and a cover layer 2.
Wherein, the covering layer 2 can be bonded on the surface of the porous framework catalyst module 1 in the form of slurry.
Optionally, the cover layer 2 may be formed by a particle catalyst, and slurry obtained by pulping the cover layer 2 may be further impregnated into the surface of the porous skeleton catalyst module 1 and then dried, so as to obtain the urea microwave hydrolysis catalyst.
In the embodiment of the present invention, the porous skeleton catalyst module 1 may be a porous skeleton module made of a non-microwave-absorbing material, and the cover layer 2 may include a granular catalyst made of a microwave-absorbing material.
In the embodiment of the present invention, the porous framework catalyst module 1 may include a porous alumina framework module, a porous silica framework module, and/or a porous titania framework module.
In embodiments of the present invention, the particulate catalyst made of microwave absorbing material may include metal oxide particles, silicon carbide particles, and/or graphite particles.
In the embodiment of the invention, the particle diameter of the particle catalyst is 20nm-20 um.
In the embodiment of the present invention, the porous skeletal catalyst module 1 may be a module obtained by cleaning a porous catalyst substrate, and the porous catalyst substrate may be a porous catalyst frame.
Optionally, the porous catalyst substrate may be subjected to ultrasonic cleaning treatment by using a target cleaning solution to remove organic matters on the porous catalyst substrate, so as to obtain a porous skeleton catalyst module; the target cleaning solution may include alcohol and water.
Alternatively, the particulate catalyst included in the cover layer 2 may be obtained by treating a powder catalyst by a gel sol method, for example, by subjecting the powder catalyst to a sintering activation treatment to obtain a particulate catalyst.
Illustratively, after the porous catalyst substrate is subjected to ultrasonic cleaning treatment by using alcohol and water, that is, organic matters on the porous catalyst substrate are removed, a porous skeleton catalyst module 1 is obtained, a powder catalyst is treated by using a gel sol method to prepare a granular catalyst, for example, the powder catalyst is subjected to sintering activation treatment, a covering layer 2 is formed by using the granular catalyst, then the covering layer 2 is subjected to pulping treatment to obtain slurry, and the slurry is impregnated into the surface of the porous skeleton catalyst module 1 and then is subjected to drying treatment, so that the urea microwave hydrolysis catalyst is obtained. The urea pyrolysis efficiency using the urea microwave hydrolysis catalyst is ten times higher than that without the catalyst, and a graph of the urea pyrolysis efficiency versus the microwave power can be shown in fig. 2.
The invention provides a urea microwave hydrolysis catalyst, which belongs to the technical field of catalyst preparation and comprises the following components: a porous skeletal catalyst module and a cover layer; wherein the cover layer is bonded to the surface of the porous skeletal catalyst module in the form of a slurry: the urea microwave hydrolysis catalyst has the advantages that the urea pyrolysis efficiency is ten times higher than that of the urea microwave hydrolysis catalyst without the catalyst, and the process is simple and easy to realize.
In another possible embodiment, the present invention further provides a method for manufacturing a urea microwave hydrolysis catalyst, as shown in fig. 3, which is a schematic flow chart of the manufacturing method of the urea microwave hydrolysis catalyst, and the steps included in the method are specifically described below with reference to fig. 3.
Step S201, obtaining a particle catalyst and a porous catalyst substrate.
Wherein the particulate catalyst is a particle made of microwave absorbing material, and the porous catalyst substrate may be a porous catalyst frame; also, the particulate catalyst made of microwave absorbing material may include metal oxide particles, silicon carbide particles and/or graphite particles
In the actual processing, the process of obtaining the particulate catalyst in step S201 may include:
step S2011, a powder catalyst is obtained.
Specifically, the powdered catalyst can be obtained directly by the existing powdered catalyst preparation method, or can be obtained by direct purchase, and is not limited herein.
Step S2012, performing a gel sol treatment on the powder catalyst to obtain the particulate catalyst.
Specifically, the powder catalyst may be subjected to a gel sol treatment, for example, the powder catalyst may be subjected to a sintering activation treatment to obtain a particulate catalyst.
The particle diameter of the particulate catalyst may be 20nm to 20um during actual processing.
And S202, carrying out organic matter removal treatment on the porous catalyst substrate to obtain the porous framework catalyst module.
In the actual process, step S202 can be realized by the following sub-steps:
and step S2021, determining a target cleaning solution.
The target cleaning solution may include alcohol and water, among others.
Specifically, since the porous catalyst substrate usually contains organic matter, when the porous catalyst substrate is obtained, the target cleaning solution can be further obtained, so as to facilitate subsequent organic matter treatment.
Step S2022, performing ultrasonic cleaning treatment on the porous catalyst substrate by using the target cleaning solution to obtain a porous skeleton catalyst module.
Specifically, the porous catalyst substrate is subjected to ultrasonic cleaning treatment by using a target cleaning solution, so that organic matters on the porous catalyst substrate are removed, and the porous framework catalyst module is obtained.
In actual processing procedure, porous skeleton catalyst module can be for not absorbing the porous skeleton module that microwave material made, and porous skeleton catalyst module can include porous alumina skeleton module, porous silica skeleton module and/or porous titanium oxide skeleton module. The porous skeletal catalyst module 1 may be a module obtained by cleaning a porous catalyst substrate, and the porous catalyst substrate may be a porous catalyst frame.
Step S203, the particle catalyst is processed into a covering layer.
Specifically, when the particulate catalyst is obtained, the particulate catalyst may be further processed into an overlayer, that is, the overlayer may be formed of the particulate catalyst, or the overlayer may include the particulate catalyst.
In actual processing, the cover layer may include a particulate catalyst made of a microwave absorbing material, and the particulate catalyst made of a microwave absorbing material may include metal oxide particles, silicon carbide particles, and/or graphite particles.
And S204, carrying out bonding treatment on the covering layer on the surface of the porous framework catalyst module to obtain the urea microwave hydrolysis catalyst.
Specifically, when the particle catalyst is processed into the covering layer, the covering layer can be further processed into slurry, so that the slurry is soaked into the surface of the porous framework catalyst module and then dried, and the urea microwave hydrolysis catalyst is obtained.
The invention provides a preparation method of a urea microwave hydrolysis catalyst, belonging to the technical field of catalyst preparation and comprising the following steps: obtaining a particulate catalyst and a porous catalyst substrate; wherein the particulate catalyst is a particle made of microwave absorbing material; carrying out organic matter removal treatment on the porous catalyst substrate to obtain a porous framework catalyst module; treating the particulate catalyst into an overlayer; and carrying out bonding treatment on the covering layer on the surface of the porous framework catalyst module to obtain the urea microwave hydrolysis catalyst. Namely, the process for preparing the urea microwave hydrolysis catalyst by using the method is simple and easy to operate, the raw materials are simple, the hydrolysis efficiency is high, the energy consumption is low, the pyrolysis efficiency of urea can be greatly improved by using the urea microwave hydrolysis catalyst, and the urea microwave hydrolysis catalyst can also be used for preparing ammonia by microwave hydrolysis of urea, so that the high efficiency and the reliability for preparing ammonia are greatly improved.
Fig. 4 is a schematic diagram of an apparatus for preparing a urea microwave hydrolysis catalyst according to another embodiment of the present invention, and as shown in fig. 4, the apparatus for preparing a urea microwave hydrolysis catalyst: an obtaining module 301, a first processing module 302, a second processing module 303, and a bonding processing module 304, wherein:
an obtaining module 301 for obtaining a particulate catalyst and a porous catalyst substrate; wherein the particulate catalyst is a particle made of a microwave absorbing material.
The first processing module 302 is configured to perform organic matter removal processing on the porous catalyst substrate to obtain a porous framework catalyst module.
A second treatment module 303 for treating the particulate catalyst as an overlayer.
And the bonding treatment module 304 is used for performing bonding treatment on the covering layer on the surface of the porous framework catalyst module to obtain the urea microwave hydrolysis catalyst.
It should be noted that, for the descriptions of the same steps and the same contents in this embodiment as those in other embodiments, reference may be made to the descriptions in other embodiments, which are not described herein again.
The invention relates to a device for preparing a urea microwave hydrolysis catalyst, which comprises: obtain module, first processing module, second processing module, bonding processing module, wherein: an obtaining module for obtaining a particulate catalyst and a porous catalyst substrate; wherein the particulate catalyst is a particle made of a microwave absorbing material. And the first treatment module is used for removing organic matters from the porous catalyst substrate to obtain the porous framework catalyst module. A second treatment module for treating the particulate catalyst into an overlayer. And the bonding treatment module is used for performing bonding treatment on the covering layer on the surface of the porous framework catalyst module to obtain the urea microwave hydrolysis catalyst. Namely, the process for preparing the urea microwave hydrolysis catalyst by using the method is simple and easy to operate, the raw materials are simple, the hydrolysis efficiency is high, the energy consumption is low, the pyrolysis efficiency of urea can be greatly improved by using the urea microwave hydrolysis catalyst, and the urea microwave hydrolysis catalyst can also be used for preparing ammonia by microwave hydrolysis of urea, so that the high efficiency and the reliability for preparing ammonia are greatly improved.
Fig. 5 is a schematic diagram of another apparatus for controlling the production of a microwave urea hydrolysis catalyst according to another embodiment of the present invention, where the apparatus can be integrated into a terminal device or a chip of the terminal device.
The device includes: memory 401, processor 402.
The memory 401 is used for storing programs, and the processor 402 calls the programs stored in the memory 401 to execute the above-mentioned method embodiments. The specific implementation and technical effects are similar, and are not described herein again.
Preferably, the present invention also provides a computer-readable storage medium comprising a program which, when executed by a processor, is adapted to perform the above-described method embodiments.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Claims (10)
1. A urea microwave hydrolysis catalyst, characterized by comprising: a porous skeletal catalyst module and a cover layer; wherein the cover layer is bonded to the surface of the porous skeletal catalyst module in the form of a slurry.
2. The microwave urea hydrolysis catalyst according to claim 1, wherein the porous skeletal catalyst module is a porous skeletal module made of a non-microwave-absorbing material, and the cover layer includes a particulate catalyst made of a microwave-absorbing material therein.
3. The urea microwave hydrolysis catalyst according to claim 2, wherein the porous framework catalyst module comprises a porous alumina framework module, a porous silica framework module, and/or a porous titania framework module.
4. The microwave urea hydrolysis catalyst according to claim 2, wherein the particulate catalyst made of microwave absorbing material comprises metal oxide particles, silicon carbide particles and/or graphite particles.
5. The microwave urea hydrolysis catalyst according to claim 3, wherein the particle diameter of the particulate catalyst is 20nm to 20 um.
6. A preparation method of a urea microwave hydrolysis catalyst is characterized by comprising the following steps:
obtaining a particulate catalyst and a porous catalyst substrate; wherein the particulate catalyst is a particle made of microwave absorbing material;
carrying out organic matter removal treatment on the porous catalyst substrate to obtain a porous skeleton catalyst module;
treating the particulate catalyst into an overlayer;
and carrying out bonding treatment on the covering layer on the surface of the porous framework catalyst module to obtain the urea microwave hydrolysis catalyst.
7. The method for preparing a urea microwave hydrolysis catalyst according to claim 6, wherein the step of performing organic matter removal treatment on the porous catalyst substrate to obtain a porous skeleton catalyst module comprises:
determining a target cleaning solution;
and carrying out ultrasonic cleaning treatment on the porous catalyst substrate by using the target cleaning solution to obtain the porous framework catalyst module.
8. The method for preparing a catalyst for microwave hydrolysis of urea according to claim 6, wherein the obtaining of the particulate catalyst comprises:
obtaining a powder catalyst;
and carrying out gel sol treatment on the powder catalyst to obtain the granular catalyst.
9. The method for preparing a microwave urea hydrolysis catalyst according to claim 8, wherein the step of subjecting the powdered catalyst to a gel sol treatment to obtain the particulate catalyst comprises:
and sintering and activating the powder catalyst to obtain the granular catalyst.
10. The method for preparing a urea microwave hydrolysis catalyst according to claim 6, wherein the step of bonding the cover layer to the surface of the porous skeleton catalyst module to obtain the urea microwave hydrolysis catalyst comprises:
and soaking the covering layer into the surface of the porous framework catalyst module, and then drying to obtain the urea microwave hydrolysis catalyst.
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| US20010016183A1 (en) * | 1998-08-03 | 2001-08-23 | Lothar Hofmann | Process for converting urea into ammonia |
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