CN109201040A - A kind of carbon nanotube-manganese oxide composite material of efficient catalytic methane and preparation method thereof - Google Patents
A kind of carbon nanotube-manganese oxide composite material of efficient catalytic methane and preparation method thereof Download PDFInfo
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- CN109201040A CN109201040A CN201811142970.XA CN201811142970A CN109201040A CN 109201040 A CN109201040 A CN 109201040A CN 201811142970 A CN201811142970 A CN 201811142970A CN 109201040 A CN109201040 A CN 109201040A
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- carbon nanotube
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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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/32—Manganese, technetium or rhenium
- B01J23/34—Manganese
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The invention discloses carbon nanotube-manganese oxide composite materials of a kind of efficient catalytic methane and preparation method thereof, belong to new energy field, are absorbed in and solve low-concentration methane gas Utilizing question, develop catalyst for catalytic oxidation system.Firstly, preparing carbon nanotube-manganese oxide composite material using infusion process；Then, then by this kind of composite material carry out methyl hydride combustion catalytic degradation measurement experiment.Compared with current all material, the carbon nanotube of efficient catalytic methane of the present invention-manganese oxide composite material partial size is small, and dispersion degree is high, can substantially reduce the temperature of methane completely burned, environmental when methane burns in a conventional manner is reduced, utilization efficiency is improved.Preparation method of the invention, step is simple, easy to operate, and preparation condition is mild, easy to control, high-efficient.
Description
Technical field
The invention belongs to catalyst carrier field, in particular to a kind of carbon nanotube-manganese oxide of efficient catalytic methane is multiple
Condensation material and preparation method thereof.
Background technique
In catalytic field, methane catalytic combustion technology is due to may make methane to react at a lower temperature with oxygen
Generate CO2、H2O simultaneously releases energy, while can improve utilization efficiency, also solves ring when methane burns in a conventional manner
Border pollution problem, therefore, it has become a kind of effective volatile organic matter technology for eliminating.
Realize that the key of catalysis burning is the selection of catalyst material, for methane catalytic combustion, to catalyst
General requirement are as follows: should have alap initiation temperature under certain fuel/air rate；In minimum preheating temperature and most
Completely burned is still able to maintain under big mass transfer condition；Catalyst carrier has compared with Large ratio surface, lower resistance and heat resistance；With excellent
Good active thermal-stable.
Carbon nanotube (CNTs) is due to being widely used hair on the scene with excellent electric property and mechanical property
Penetrate, the fields such as energy battery, simultaneously because there is biggish specific surface area, excellent electronic conduction ability, to reactant and
Stereoselectivity, efficient reactivity, carbon and metallic catalyst between the special absorption of product and desorption performance, special vestibule
Between the properties such as interaction, become a kind of catalyst carrier material haveing excellent performance.
In general, when transition metal or its oxide are supported on the carrier of high-ratio surface as active component and catalyst are made
When, the initiation temperature of methane catalytic combustion and complete conversion temperature are all significantly lower than their burning point, and work as transition metal ions
Out orbit have and easily appraise at the current rate when being inclined to, just can adsorb oxygen at a lower temperature, utilize the catalysis of catalyst made of it
Activity can significantly improve.Manganese oxide is a kind of catalyst of deep oxidation, due to [ MnO6Octahedron in there are Mn2+、Mn3+With
Mn4+The manganese of a variety of valence states, and easily mutually convert, so that manganese oxide has very strong catalytic activity.Therefore a kind of use is studied
Carbon nanotube is the composite material of the new and effective catalytic methane of carrier combined oxidation manganese, it appears particularly necessary.
Summary of the invention
In order to further decrease the temperature of methane completely burned, methyl hydride combustion catalytic efficiency is improved, present invention aims at
A kind of carbon nanotube-manganese oxide composite material and preparation method thereof of efficient catalytic methane is provided.
To achieve the above object, the technical solution adopted by the present invention is as follows:
A kind of carbon nanotube-manganese oxide composite material of efficient catalytic methane, using nano-scale carbon nanotube as carrier, carbon nanometer
The core surface bond of pipe has manganese oxide.
A kind of carbon nanotube-manganese oxide composite material preparation method of efficient catalytic methane, comprising the following steps:
S1, nano-scale carbon nanotube dust is prepared；
S2, keep carbon nanotube and manganese oxide compound by infusion process:
S2.1, nano-scale carbon nanotube obtained by the S1 of certain mass is dispersed in certain density Mn (NO3)2In solution, juxtaposition
In 100 DEG C of environment of water-bath, constant temperature keeps at least 1h；
S2.2, S2.1 is stood in room temperature environment, takes its supernatant after stablizing, and is stood overnight, then place it in 60 ~
6h is dried in 100 DEG C of environment to get carbon nanotube-manganese oxide composite material.
Further, it in S2, counts in mass ratio, carbon nanotube and Mn (NO3)2The consumption proportion of solution (AR, wt=50%) is 1:
5.5~54。
Beneficial effect is:
1, the carbon nanotube of efficient catalytic methane of the present invention-manganese oxide composite material partial size is small, and dispersion degree is high, can drop significantly
The temperature of low-methoxyl alkane completely burned, reduces environmental when methane burns in a conventional manner, improves utilization efficiency.
2, carbon nanotube-manganese oxide composite material of efficient catalytic methane of the invention, each carbon nanotube are one
Catalytic carrier, large number of spherical manganese oxide finely ground particle substance by infusion process be uniformly supported on carbon nanotube surface and
In gap, both maintained catalyst surface with more number of active center, in turn ensure manganese component not easy-sintering and lose work
Property.
3, carbon nanotube is first prepared in the present invention, is then urged it with compound prepare of manganese oxide particle by infusion process
Agent precursor obtains catalyst material after drying a period of time in high temperature, and it is real to be carried out the measurement of methyl hydride combustion catalytic degradation
It tests.Preparation method of the invention, step is simple, easy to operate, and preparation condition is mild, easy to control, high-efficient.
Detailed description of the invention
Fig. 1 is a kind of carbon nanotube-manganese oxide composite material SEM of efficient catalytic methane prepared in embodiment 1
Figure；
Fig. 2 is a kind of carbon nanotube-manganese oxide composite material SEM figure of efficient catalytic methane prepared in embodiment 2.
Specific embodiment
Technical solution of the present invention is further described in detail below in conjunction with specific embodiment, but protection of the invention
Range is not limited thereto.
A kind of carbon nanotube-manganese oxide composite material of efficient catalytic methane, using nano-scale carbon nanotube as carrier, carbon
The core surface bond of nanotube has manganese oxide.
Embodiment 1
A kind of carbon nanotube-manganese oxide composite material of efficient catalytic methane, comprising the following steps:
S1, nano-scale carbon nanotube dust is prepared；
S2, keep carbon nanotube and manganese oxide compound by infusion process:
S2.1, nano-scale carbon nanotube obtained by the S1 of certain mass is dispersed in certain density Mn (NO3)2In solution, carbon is received
Mitron and Mn (NO3)2Above-mentioned system is placed in 100 DEG C of environment of water-bath by the consumption proportion of solution (AR, wt=50%) in 1:42, permanent
Temperature keeps at least 1h；
S2.2, above-mentioned system is stood in room temperature environment, takes its supernatant after stablizing, and stood overnight, then set
At least 6h is dried in 60 ~ 100 DEG C of environment to get carbon nanotube-manganese oxide composite material.
Embodiment 2
A kind of carbon nanotube-manganese oxide composite material of efficient catalytic methane, comprising the following steps:
S1, nano-scale carbon nanotube dust is prepared；
S2, keep carbon nanotube and manganese oxide compound by infusion process:
S2.1, nano-scale carbon nanotube obtained by the S1 of certain mass is dispersed in certain density Mn (NO3)2In solution, carbon is received
Mitron and Mn (NO3)2Above-mentioned system is placed in 100 DEG C of environment of water-bath by the consumption proportion of solution (AR, wt=50%) in 1:54, permanent
Temperature keeps at least 1h；
S2.2, above-mentioned system is stood in room temperature environment, takes its supernatant after stablizing, and stood overnight, then set
At least 6h is dried in 60 ~ 100 DEG C of environment to get carbon nanotube-manganese oxide composite material.
Fig. 1 of the invention is carbon nanotube-manganese oxide composite material preparating mechanism of efficient catalytic methane of the present invention
Figure.Each carbon nanotube is a catalytic carrier, and large number of spherical manganese oxide finely ground particle substance is uniform by infusion process
Be supported in the surface and gap of carbon nanotube, not only maintained catalyst surface with more number of active center, but also guarantee
Manganese component not easy-sintering and lose activity.
The above described is only a preferred embodiment of the present invention, be not intended to limit the scope of the present invention,
Therefore the changes or modifications that claim under this invention and specification are done in every case, it all should belong to the range that the invention patent covers
Within.
Claims (3)
1. a kind of carbon nanotube of efficient catalytic methane-manganese oxide composite catalyst material, it is characterised in that: composite catalyst
For material using carbon nanotube as carrier, the core surface bond of the carbon nanotube has manganese oxide particle.
2. a kind of carbon nanotube-manganese oxide composite material preparation method of efficient catalytic methane as described in claim 1,
It is characterized in that, comprising the following steps:
S1, carbon nano tube surface hydroxylating is handled；
S2, keep carbon nanotube and manganese oxide compound by infusion process:
S2.1, carbon nanotube obtained by the S1 of certain mass is dispersed in certain density Mn (NO3)2In solution, it is placed in water-bath
In 100 DEG C of environment, constant temperature keeps at least 1h；
S2.2, S2.1 is filtered in room temperature environment, and is stood overnight, then placed it in 60 ~ 100 DEG C of environment and be dried to
Few 6h is to get carbon nanotube-manganese oxide composite material.
3. a kind of carbon nanotube-manganese oxide composite material preparation method of efficient catalytic methane as claimed in claim 2,
It is characterized by: being counted in mass ratio in S2, carbon nanotube and Mn (NO3)2The consumption proportion of solution (AR, wt=50%) is 1:
5.5~54。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111036264A (en) * | 2019-12-11 | 2020-04-21 | 太原理工大学 | Preparation method of coal-based carbon nanotube catalyst for efficiently catalyzing and oxidizing toluene |
| CN113289615A (en) * | 2021-06-17 | 2021-08-24 | 佛山市诺蓝环保科技有限公司 | Preparation method and application of carbon nano tube in-situ loaded manganese dioxide catalyst |
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| CN111036264A (en) * | 2019-12-11 | 2020-04-21 | 太原理工大学 | Preparation method of coal-based carbon nanotube catalyst for efficiently catalyzing and oxidizing toluene |
| CN111036264B (en) * | 2019-12-11 | 2022-06-28 | 太原理工大学 | Preparation method of coal-based carbon nanotube catalyst for efficiently catalyzing and oxidizing toluene |
| CN113289615A (en) * | 2021-06-17 | 2021-08-24 | 佛山市诺蓝环保科技有限公司 | Preparation method and application of carbon nano tube in-situ loaded manganese dioxide catalyst |
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