CN108452792A - A kind of doped aluminium nano-powder and preparation method thereof for tail gas clean-up - Google Patents
A kind of doped aluminium nano-powder and preparation method thereof for tail gas clean-up Download PDFInfo
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- CN108452792A CN108452792A CN201810225603.XA CN201810225603A CN108452792A CN 108452792 A CN108452792 A CN 108452792A CN 201810225603 A CN201810225603 A CN 201810225603A CN 108452792 A CN108452792 A CN 108452792A
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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
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
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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
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
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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
- B01J23/10—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of rare earths
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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
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
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Abstract
The invention belongs to field of nano material preparation, and in particular to a kind of doped aluminium nano-powder and preparation method thereof for tail gas clean-up.Technical scheme is as follows：A kind of doped aluminium nano-powder for tail gas clean-up, by γ Al2O3Nano-powder, cerium oxide and lanthana composition, γ Al2O3The quality parts ratio of nano-powder, cerium oxide and lanthana is 100~115：1~5：1~5.Provided by the present invention for the doped aluminium nano-powder and preparation method thereof of tail gas clean-up, the powder can improve the defect of existing tail gas clean-up material, with height storage oxygen and heat safe performance, effectively reduce rare earth oxide dosage, improve purification efficiency, and its preparation process is simple, cost-effective feature.
Description
Technical field
The invention belongs to field of nano material preparation, and in particular to a kind of doped aluminium nano powder for tail gas clean-up
Body and preparation method thereof.
Background technology
Since the structure of nano aluminium oxide is special, possess some unique performance such as high intensity and porosity, hardness it is high,
Toughness and high fire resistance etc., and be widely used in coating additive, various catalyst, special efficacy fire retardant, grinding agent etc..Therefore oxygen
The preparation method and technology and application field for changing aluminium are discussed the extremely wide of research.
γ-Al2O3Nano-powder is a kind of novel inorganic functional material, and strong adsorption is had excellent performance, and is largely used to urge
The important industrial circle such as change, rubber, coating, resistance element, therefore obtain the favor of nano-powder industrial circle.
As various countries are to the pay attention to day by day of environmental protection, the tail gas such as automobile, motorcycle, chemical tower have to pass through purified treatment
It is up to standard to discharge.When temperature is higher than 600 DEG C, porous skeleton structure is easy broken existing tail-gas catalyst support materials
It is bad, lose high-ratio surface characteristic.
Invention content
The present invention provides a kind of doped aluminium nano-powder and preparation method thereof for tail gas clean-up, which can change
It is apt to the defect of existing tail gas clean-up material, there is high storage oxygen and heat safe performance, effectively reduce rare earth oxide dosage, improves
Purification efficiency and simple, the cost-effective feature of its preparation process.
Technical scheme is as follows：
A kind of doped aluminium nano-powder for tail gas clean-up, by γ-Al2O3Nano-powder, cerium oxide and lanthana
Composition, γ-Al2O3The quality parts ratio of nano-powder, cerium oxide and lanthana is 100~115：1~5：1~5.
The doped aluminium nano-powder for tail gas clean-up, preferred embodiment are γ-Al2O3Nano-powder,
The quality parts ratio of cerium oxide and lanthana is 100：2：2.
The doped aluminium nano-powder for tail gas clean-up, grain size are 5~50nm.
The preparation method of the above-mentioned doped aluminium nano-powder for tail gas clean-up, raw materials used is nine nitric hydrates
Aluminium, six nitric hydrate ceriums, lanthanum nitrate hexahydrate, urea, poly- sodium propionate, deionized water and absolute ethyl alcohol, ANN aluminium nitrate nonahydrate, six
Nitric hydrate cerium, lanthanum nitrate hexahydrate, urea, poly- sodium propionate, water and absolute ethyl alcohol addition mass fraction be：Nine hydration nitre
115~135 parts of sour aluminium, six 0.2~3 part of nitric hydrate ceriums, 0.2~3 part of lanthanum nitrate hexahydrate, 25~35 parts of urea, poly- propionic acid
10~15 parts of sodium, 300~400 parts of water, 150~200 parts of absolute ethyl alcohol.
The preparation method, includes the following steps：
1) it takes ANN aluminium nitrate nonahydrate by material rate, six nitric hydrate ceriums, lanthanum nitrate hexahydrate, urea, poly- sodium propionate, go
Ionized water and absolute ethyl alcohol, are mixed after stirring evenly, and are reacted 2~5 hours under the conditions of 50~85 DEG C of reaction temperature, obtain
Milky forerunner's liquid suspension；
2) filtering of forerunner's liquid suspension is cleaned up, obtains filter cake, be freeze-dried at -15 DEG C~-5 DEG C；
3) it by the filter cake after corundum ball grinder ball milling, is warming up to using the heating rate of 10 DEG C/min in Muffle furnace
150 DEG C, 30~90min is then kept the temperature, is then warming up to 900~1000 DEG C with the heating rate of 3 DEG C/min, keeps the temperature 2~5 hours
Afterwards, furnace cooling obtains doped aluminium nano-powder.
The preparation method, preferred embodiment are that forerunner's liquid suspension carried out in such a way that decompression filters
Filter filters while being added deionized water, cleaning filtering 4-6 times.
The preparation method, the aluminum nitrate are replaced or by the other aluminium salts for being dissolved in water by a variety of water-soluble aluminium salts
Mixing replaces；The cerous nitrate is replaced by water-soluble other cerium salts or is replaced by a variety of water-soluble cerium salt mixing；Institute
Lanthanum nitrate is stated to be replaced by water-soluble other cerium salts or replaced by a variety of water-soluble lanthanum salt mixing.
Beneficial effects of the present invention are：
1, doped aluminium nano-powder of the invention has catalysis well after doped cerium oxide and lanthana
Activity can purify the tail gas of automobile, motorcycle, chemical industry rectifying column.
2, the present invention is when keeping other process conditions constant, by changing water-soluble aluminium salt, cerium salt or lanthanum salt kind
Class can prepare the γ-Al of different-shape2O3Nano-powder.
3, the doped gamma-Al of cerium oxide and lanthana is mixed2O3The thermal stability of nano-powder is high, can resistance to -10~900
DEG C thermal cycle impact.
4, due to the doped gamma-Al of the present invention2O3The amount very little of the cerium oxide and lanthana that are adulterated in nano-powder, with normal
The powder mixing method of rule is difficult to be uniformly mixed three；The solution deposit by wet method of the present invention is by three's co-precipitation, no
It is only uniformly mixed and powder granularity is tiny.
5, doped aluminium of the invention is with γ-Al2O3Nano-powder is stephanoporate framework, and cerium oxide and lanthana are storage
Oxygen material, the performance that high temperature resistant can be reached, rare-earth oxidation dosage is reduced, improve tail gas clean-up efficiency；Preparation method has
Simple for process, reduction energy consumption, cost-effective feature.
Specific implementation mode
With reference to specific embodiment, the present invention will be described in further detail, but protection scope of the present invention is not had
The examples of implementation of body are limited.In addition, with without prejudice under the premise of technical solution of the present invention, this field done to the present invention is general
Logical technical staff any modifications or changes easy to implement are fallen within scope of the presently claimed invention.
Raw material in following embodiment is purchased in market.
Embodiment 1
By each raw material according to mass fraction：115 parts of ANN aluminium nitrate nonahydrate, six 0.2 part of nitric hydrate ceriums, lanthanum nitrate hexahydrate
0.2 part, 25 parts of urea, 10 parts of poly- sodium propionate, 300 parts of water, after the ratio that 150 parts of absolute ethyl alcohol is mixed evenly, use is molten
Liquid precipitate method, the reaction time is 2 hours under the conditions of 50 DEG C of reaction temperature, obtains milky forerunner's liquid suspension；
After the filtering of forerunner's liquid suspension is cleaned up, filter cake is obtained, is then freezed filter cake under the conditions of -15 DEG C dry
It is dry, after ball milling, be warming up to 150 DEG C in corundum ball grinder with the heating rate of 10 DEG C/min in Muffle furnace, then keep the temperature
60min is then warming up to 900 DEG C with the heating rate of 3 DEG C/min, air-cooled with stove after keeping the temperature 2 hours, obtains tail gas catalyzed efficiency
Doped aluminium nano-powder high, thermal stability is good.
In the doped aluminium nano-powder of preparation, γ-Al2O3The mass ratio of nano-powder, cerium oxide and lanthana is
100 parts：1 part：1 part, the grain size of powder is 5~20nm.
Mix the catalytic efficiency of the doped aluminium nano-powder of cerium oxide and lanthana in 850 DEG C of simulated automotive tail gas
As shown in table 1：
Table 1
Embodiment 2
By each raw material according to mass fraction：115 parts of ANN aluminium nitrate nonahydrate, six 0.2 part of nitric hydrate ceriums, lanthanum nitrate hexahydrate
0.2 part, 25 parts of urea, 10 parts of poly- sodium propionate, 300 parts of water, after the ratio that 150 parts of absolute ethyl alcohol is mixed evenly, use is molten
Liquid precipitate method, the reaction time is 3 hours under the conditions of 65 DEG C of reaction temperature, obtains milky forerunner's liquid suspension；
After the filtering of forerunner's liquid suspension is cleaned up, filter cake is obtained, is then freezed filter cake under the conditions of -15 DEG C dry
It is dry, after ball milling, be warming up to 150 DEG C in corundum ball grinder with the heating rate of 10 DEG C/min in Muffle furnace, then keep the temperature
60min is then warming up to 900 DEG C with the heating rate of 3 DEG C/min, air-cooled with stove after keeping the temperature 2 hours, obtains tail gas catalyzed efficiency
Doped aluminium nano-powder high, thermal stability is good.
In the doped aluminium nano-powder of preparation, γ-Al2O3The mass ratio of nano-powder, cerium oxide and lanthana is
100 parts：1 part：1 part, the grain size of powder is 7~22nm.
Mix the catalytic efficiency of the doped aluminium nano-powder of cerium oxide and lanthana in 900 DEG C of simulated automotive tail gas
As shown in table 2：
Table 2
Embodiment 3
By each raw material according to mass fraction：125 parts of ANN aluminium nitrate nonahydrate, six 0.5 part of nitric hydrate ceriums, lanthanum nitrate hexahydrate
0.5 part, 25 parts of urea, 10 parts of poly- sodium propionate, 300 parts of water, after the ratio that 150 parts of absolute ethyl alcohol is mixed evenly, use is molten
Liquid precipitate method, the reaction time is 3 hours under the conditions of 65 DEG C of reaction temperature, obtains milky forerunner's liquid suspension；
After the filtering of forerunner's liquid suspension is cleaned up, filter cake is obtained, is then freezed filter cake under the conditions of -15 DEG C dry
It is dry, after ball milling, be warming up to 150 DEG C in corundum ball grinder with the heating rate of 10 DEG C/min in Muffle furnace, then keep the temperature
60min is then warming up to 900 DEG C with the heating rate of 3 DEG C/min, air-cooled with stove after keeping the temperature 3 hours, obtains tail gas catalyzed efficiency
Doped aluminium nano-powder high, thermal stability is good.
In the doped aluminium nano-powder of preparation, γ-Al2O3The mass ratio of nano-powder, cerium oxide and lanthana is
100 parts：1.2 part：1.2 parts, the grain size of powder is 5~25nm.
Embodiment 4
By each raw material according to mass fraction：125 parts of ANN aluminium nitrate nonahydrate, six 0.5 part of nitric hydrate ceriums, lanthanum nitrate hexahydrate
0.5 part, 25 parts of urea, 10 parts of poly- sodium propionate, 400 parts of water, after the ratio that 200 parts of absolute ethyl alcohol is mixed evenly, use is molten
Liquid precipitate method, the reaction time is 3 hours under the conditions of 55 DEG C of reaction temperature, obtains milky forerunner's liquid suspension；
After the filtering of forerunner's liquid suspension is cleaned up, filter cake is obtained, is then freezed filter cake under the conditions of -10 DEG C dry
It is dry, after ball milling, be warming up to 150 DEG C in corundum ball grinder with the heating rate of 10 DEG C/min in Muffle furnace, then keep the temperature
60min is then warming up to 900 DEG C with the heating rate of 3 DEG C/min, air-cooled with stove after keeping the temperature 3 hours, obtains tail gas catalyzed efficiency
Doped aluminium nano-powder high, thermal stability is good.
In the doped aluminium nano-powder of preparation, γ-Al2O3The mass ratio of nano-powder, cerium oxide and lanthana is
100 parts：1.1 part：1.1 parts, the grain size of powder is 5~21nm.
Embodiment 5
By each raw material according to mass fraction：125 parts of ANN aluminium nitrate nonahydrate, six 0.5 part of nitric hydrate ceriums, lanthanum nitrate hexahydrate
0.5 part, 32 parts of urea, 10 parts of poly- sodium propionate, 400 parts of water, after the ratio that 200 parts of absolute ethyl alcohol is mixed evenly, use is molten
Liquid precipitate method, the reaction time is 3 hours under the conditions of 55 DEG C of reaction temperature, obtains milky forerunner's liquid suspension；
After the filtering of forerunner's liquid suspension is cleaned up, filter cake is obtained, is then freezed filter cake under the conditions of -10 DEG C dry
It is dry, after ball milling, be warming up to 150 DEG C in corundum ball grinder with the heating rate of 10 DEG C/min in Muffle furnace, then keep the temperature
60min is then warming up to 900 DEG C with the heating rate of 3 DEG C/min, air-cooled with stove after keeping the temperature 3 hours, obtains tail gas catalyzed efficiency
Doped aluminium nano-powder high, thermal stability is good.
In the doped aluminium nano-powder of preparation, γ-Al2O3The mass ratio of nano-powder, cerium oxide and lanthana is
100 parts：1.1 part：1.1 parts, the grain size of powder is 5~21nm.
Claims (7)
1. a kind of doped aluminium nano-powder for tail gas clean-up, which is characterized in that by γ-Al2O3Nano-powder, oxidation
Cerium and lanthana composition, γ-Al2O3The quality parts ratio of nano-powder, cerium oxide and lanthana is 100~115：1~5：1~
5。
2. the doped aluminium nano-powder according to claim 1 for tail gas clean-up, which is characterized in that γ-Al2O3
The quality parts ratio of nano-powder, cerium oxide and lanthana is 100：2：2.
3. the doped aluminium nano-powder according to claim 1 for tail gas clean-up, which is characterized in that its grain size is
5~50nm.
4. a kind of preparation method of doped aluminium nano-powder for tail gas clean-up as described in one of claim 1-3,
It is characterized in that, it is raw materials used for ANN aluminium nitrate nonahydrate, six nitric hydrate ceriums, lanthanum nitrate hexahydrate, urea, poly- sodium propionate, go
Ionized water and absolute ethyl alcohol, ANN aluminium nitrate nonahydrate, six nitric hydrate ceriums, lanthanum nitrate hexahydrate, urea, poly- sodium propionate, water and nothing
The mass fraction of water-ethanol addition is：115~135 parts of ANN aluminium nitrate nonahydrate, six 0.2~3 part of nitric hydrate ceriums, six hydration nitre
0.2~3 part of sour lanthanum, 25~35 parts of urea, 10~15 parts of poly- sodium propionate, 300~400 parts of water, 150~200 parts of absolute ethyl alcohol.
5. preparation method according to claim 4, which is characterized in that include the following steps：
1) ANN aluminium nitrate nonahydrate, six nitric hydrate ceriums, lanthanum nitrate hexahydrate, urea, poly- sodium propionate, deionization are taken by material rate
Water and absolute ethyl alcohol, are mixed after stirring evenly, and are reacted 2~5 hours under the conditions of 50~85 DEG C of reaction temperature, obtain milky white
Forerunner's liquid suspension of color；
2) filtering of forerunner's liquid suspension is cleaned up, obtains filter cake, be freeze-dried at -15 DEG C~-5 DEG C；
3) by the filter cake after corundum ball grinder ball milling, 150 are warming up to using the heating rate of 10 DEG C/min in Muffle furnace
DEG C, 30~90min is then kept the temperature, is then warming up to 900~1000 DEG C with the heating rate of 3 DEG C/min, after keeping the temperature 2~5 hours,
Furnace cooling obtains doped aluminium nano-powder.
6. preparation method according to claim 5, which is characterized in that the side that forerunner's liquid suspension is filtered using decompression
Formula is filtered, and filters while being added deionized water, cleaning filtering 4-6 times.
7. preparation method according to claim 4, which is characterized in that the aluminum nitrate is replaced by the other aluminium salts for being dissolved in water
Or it is replaced by a variety of water-soluble aluminium salt mixing；The cerous nitrate is replaced or by water-soluble other cerium salts by a variety of solvable
It mixes and replaces in the cerium salt of water；The lanthanum nitrate is replaced by water-soluble other cerium salts or is mixed by a variety of water-soluble lanthanum salts
It closes and replaces.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101239309A (en) * | 2008-02-22 | 2008-08-13 | 江苏金长江环保汽摩消声器有限公司 | High specific area cerium aluminium base composite oxides and preparation thereof |
| CN102000558A (en) * | 2010-10-27 | 2011-04-06 | 重庆海特汽车排气系统有限公司 | Composite oxide for automobile exhaust catalytic purification and preparation method thereof |
| CN107335421A (en) * | 2016-08-03 | 2017-11-10 | 桐城市宇洁机动车尾气检测有限公司 | Composite oxide for automobile exhaust catalytic purification and preparation method thereof |
| CN107362790A (en) * | 2017-07-21 | 2017-11-21 | 广东科远高新材料有限责任公司 | A kind of modified gamma-alumina powder and preparation method thereof |
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2018
- 2018-03-19 CN CN201810225603.XA patent/CN108452792A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101239309A (en) * | 2008-02-22 | 2008-08-13 | 江苏金长江环保汽摩消声器有限公司 | High specific area cerium aluminium base composite oxides and preparation thereof |
| CN102000558A (en) * | 2010-10-27 | 2011-04-06 | 重庆海特汽车排气系统有限公司 | Composite oxide for automobile exhaust catalytic purification and preparation method thereof |
| CN107335421A (en) * | 2016-08-03 | 2017-11-10 | 桐城市宇洁机动车尾气检测有限公司 | Composite oxide for automobile exhaust catalytic purification and preparation method thereof |
| CN107362790A (en) * | 2017-07-21 | 2017-11-21 | 广东科远高新材料有限责任公司 | A kind of modified gamma-alumina powder and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 曾贵玉等: "《微纳米含能材料》", 31 May 2015, 国防工业出版社 * |
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