CN103349979A - Aluminium-oxide catalytic material and preparation method thereof - Google Patents
Aluminium-oxide catalytic material and preparation method thereof Download PDFInfo
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- CN103349979A CN103349979A CN2013102569309A CN201310256930A CN103349979A CN 103349979 A CN103349979 A CN 103349979A CN 2013102569309 A CN2013102569309 A CN 2013102569309A CN 201310256930 A CN201310256930 A CN 201310256930A CN 103349979 A CN103349979 A CN 103349979A
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Abstract
The invention discloses an aluminium-oxide catalytic material and a preparation method thereof. The aluminium-oxide catalytic material is characterized by consisting of aluminium oxide and lanthanum oxide, wherein the content of the lanthanum oxide is 3%-5%, and the rest is the aluminium oxide. The invention has the beneficial effects that the lanthanum-modified aluminium oxide is hydrothermally synthesized by carrying out hydrolytic treatment on the aluminium oxide and the lanthanum oxide, so that on the one hand, the mutual action of the aluminium oxide and the lanthanum oxide is enhanced, on the other hand, the invention has the advantages of simple process, no waste-water treatment and easiness in industrial production; the obtained aluminum-oxide catalytic material has the advantages of large specific surface area, good high-temperature ageing resistance and the like, and is applicable to waste-gas purification or catalytic combustion such as automobile tail-gas purification, organic-waste-gas elimination and natural-gas catalytic combustion.
Description
Technical field
The present invention relates to a kind of alumina catalyzation material and preparation method thereof, particularly a kind ofly be applicable to that purifying vehicle exhaust, organic exhaust gas are eliminated and the alumina catalyzation material of the waste gas purification such as natural gas catalytic combustion or catalytic combustion.
Background technology
Reducing automobile exhaust pollution, environment protection quality, realize the sustainable development of ecological environment and society, is one of important topic of China environmental protection in the present and following long duration.
Pollute for reducing, must break through from improving gasoline quality, improve the engine combustion state and increasing exhaust purification catalytic efficient three aspects:.Up to the present, be that effective way is exactly to reduce the content of HC in the tail gas, CO and three kinds of toxic gases of NOx by three-way catalytic apparatus with cleaning catalyst for tail gases of automobiles.
Three-way catalyst mainly is comprised of the noble metal active component that plays catalytic action, the alumina support that contains CeO2 catalyst aid (hydrogen-storing material) and be used for supporting active component.
The easy sintering of aluminium oxide under the high temperature obviously reduces its specific area, and the active component of load is assembled and catalytic activity decline.Along with developing rapidly of the technology such as catalytic combustion and environmental protection catalysis (such as catalytic purification and the catalytic purification poisonous, harmful exhaust of vehicle exhaust); carrier to catalyst is had higher requirement, and needs carrier not only to have good heat endurance but also have larger specific area.Therefore, in the urgent need to the novel alumina material of research and development to the bigger serface of high-temperature stable.
At present aspect the preparation high thermal stability aluminum oxide, main by adding chemical assistant, such as transition metal, alkali earth metal and rare earth element etc., form composite oxides and solid solution by chemical assistant and the aluminium oxide that adds, can slowly be situated between and the phase transformation of stable state aluminium oxide and the sintering of Inhibitory oxidation alumina particles, improve the performance of catalyst.In addition, by changing the preparation method of aluminium oxide, comprise that regulating pH value, temperature, pressure and flame burning atmosphere etc. can prepare high thermal stability aluminum oxide.
CN102491389A has announced a kind of preparation method of high temperature resistant bigger serface aluminium oxide.A kind of preparation method of high temperature resistant bigger serface aluminium oxide has been introduced in this invention, it be with alkaline-earth metal rare earth element is added to the water or ethanol water in make stabiliser solution, then stabiliser solution is joined in the suspension made from boehmite, again through making activated alumina after the operations such as dipping, evaporate to dryness, roasting.
CN1202010C has announced aluminium oxide maintaining high specific surface area under high temperature and preparation method thereof.This invention relates to a kind of A1203 material that at high temperature keeps high-ratio surface and preparation method thereof.This aluminium oxide is with altogether sol-gel method preparation in the presence of at least a additive (rare earth oxide or alkaline earth oxide).
CN100522348C has announced high thermal stability aluminum oxide and preparation method thereof.The aluminium oxide of this disclosure of the invention comprises aluminium oxide and additive, and said additive is two or more the combination in rare earth oxide, alkaline earth oxide, the transition metal oxide.The preparation method of the aluminium oxide of high thermal stability of the present invention comprises the steps: the cellulose crystallite powder is flooded in the salting liquid of rare earth, alkaline-earth metal, transition metal salt and aluminium, after aging, drying, roasting, can obtain the aluminium oxide of high thermal stability of the present invention.
No matter be the method for modified aluminas at present, its corresponding drawback is arranged.By regulating in the alumina preparation process, no matter be overcritical preparation, collosol and gel preparation, add surfactant etc., all be unfavorable for batch production, cost is higher.The heat-resisting quantity of aluminium oxide is relatively relatively poor in the simultaneously present preparation process.
Summary of the invention
The object of the present invention is to provide a kind of alumina catalyzation material preparation method, overcome the problem that prior art exists.
Alumina catalyzation material of the present invention is comprised of aluminium oxide and lanthana, and wherein the mass content of lanthana is 3%-5%, and all the other are aluminium oxide.
A kind of alumina catalyzation material preparation method provided by the invention comprises the steps:
Boehmite, lanthana are added to the water, 80-100 ℃ of lower the stirring 1-4 hour, get slurries A;
With slurries A through ball milling to D50 be 2-5 μ m, then at 70～120 ℃ of lower dry 10～20h, at 600-700 ℃ of lower roasting 4-5h, get described alumina catalyzation material
Described boehmite is that pore volume is 0.3-0.7g/ml, and alumina content is 70%;
Lanthana account for lanthana and boehmite gross weight 2.2～3.5%;
Take the gross weight of boehmite, lanthana and water as benchmark, the gross weight mark of boehmite and lanthana is 10%-30%;
Alumina catalyzation material preparation method of the present invention, compared with prior art, by processing that aluminium oxide, lanthana are hydrolyzed, Hydrothermal Synthesis lanthanum modified aluminas, strengthen on the one hand aluminium oxide and lanthana and interacted, on the other hand, had technique simple, without wastewater treatment, be easy to industrial production.The alumina catalyzation material that obtains has the advantages such as specific area is large, the high temperature ageing resistance is good, is applicable to waste gas purification or the catalytic combustions such as purifying vehicle exhaust, organic exhaust gas elimination and natural gas catalytic combustion.
Description of drawings
Fig. 1 is the XRD schematic diagram of embodiments of the invention 1 gained alumina catalyzation material.
The specific embodiment
Below in conjunction with embodiment, the present invention is further described.Following embodiment is illustrative, is not determinate, can not limit protection scope of the present invention with following embodiment.
Embodiment 1:
Be that 0.31g/ml, solid content are that 70% boehmite 135.7kg, lanthana 3kg join in the 1250kg pure water with the aperture, be heated to 80 ℃ and stir 4h; Be 2 μ m through ball milling to D50, then through 70 ℃ of dry 20h, 700 ℃ of lower roasting 4h get described alumina catalyzation material.
Consisting of of this material, lanthana 3%, aluminium oxide 97%.The fresh specific area of this alumina catalyzation material is 180m
2/ g, the specific area of this alumina catalyzation material behind 1000 ℃ of roasting 4h is 110m
2/ g
Embodiment 2:
Be that 0.68g/ml, solid content are that 70% boehmite 138.6kg, lanthana 5kg join in the 335kg pure water with the aperture, be heated to 100 ℃ and stir 1h; Be 2 μ m through ball milling to D50, then through 120 ℃ of dry 10h, 600 ℃ of lower roasting 4h get described alumina catalyzation material.
Consisting of of this material, lanthana 5%, aluminium oxide 95%.The fresh specific area of this alumina catalyzation material is 175m
2/ g, the specific area of this alumina catalyzation material behind 1000 ℃ of roasting 4h is 105m
2/ g
Embodiment 3:
Be that 0.68g/ml, solid content are that 70% boehmite 137kg, lanthana 4kg join in the 564kg pure water with the aperture, be heated to 90 ℃ and stir 2h; Be 3 μ m through ball milling to D50, then through 100 ℃ of dry 15h, 650 ℃ of lower roasting 4h get described alumina catalyzation material.
Consisting of of this material, lanthana 4%, aluminium oxide 96%.The fresh specific area of this alumina catalyzation material is 176m
2/ g, the specific area of this alumina catalyzation material behind 1000 ℃ of roasting 4h is 108m
2/ g
Above demonstration and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in the claimed scope of the invention, and the claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (5)
1. the alumina catalyzation material is characterized in that, is comprised of aluminium oxide and lanthana, and wherein the mass content of lanthana is 3%-5%, and all the other are aluminium oxide.
2. alumina catalyzation material preparation method according to claim 1 is characterized in that, comprises the steps:
Boehmite, lanthana are added to the water, get slurries A;
With slurries A through ball milling to D50 be 2-5 μ m, then dry, at 600-700 ℃ of lower roasting 4-5h, get described alumina catalyzation material.
3. method according to claim 2 is characterized in that, boehmite, lanthana are added to the water, and 80-100 ℃ of lower the stirring 1-4 hour, gets slurries A.
4. method according to claim 2 is characterized in that, described boehmite is that pore volume is 0.3-0.7g/ml, and alumina content is 70%.
5. according to claim 2,3 or 4 described methods, it is characterized in that, lanthana account for lanthana and boehmite gross weight 2.2～3.5%; Take the gross weight of boehmite, lanthana and water as benchmark, the gross weight mark of boehmite and lanthana is 10%-30%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105498760A (en) * | 2015-12-04 | 2016-04-20 | 中自环保科技股份有限公司 | Preparation method of hydrothermal-aging-resisting catalyst for exhaust treatment for natural-gas-fueled vehicle |
| CN108906024A (en) * | 2018-07-20 | 2018-11-30 | 上海应用技术大学 | Catalyst for treating waste gas and preparation method thereof and purposes |
Citations (4)
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| US5179059A (en) * | 1990-02-09 | 1993-01-12 | Degussa Ag | Catalyst for purifying the exhaust gases of internal combustion engines and method for making the catalyst |
| CN102658114A (en) * | 2012-04-24 | 2012-09-12 | 中国铝业股份有限公司 | Method for preparing aluminum oxide for catalyst |
| CN103008016A (en) * | 2012-10-31 | 2013-04-03 | 上海华明高纳稀土新材料有限公司 | High-thermostability aluminum oxide and preparation method thereof |
| CN103112881A (en) * | 2012-12-31 | 2013-05-22 | 内蒙古科技大学 | Method for preparing lanthanum aluminate powder efficiently |
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2013
- 2013-06-25 CN CN2013102569309A patent/CN103349979A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5179059A (en) * | 1990-02-09 | 1993-01-12 | Degussa Ag | Catalyst for purifying the exhaust gases of internal combustion engines and method for making the catalyst |
| CN102658114A (en) * | 2012-04-24 | 2012-09-12 | 中国铝业股份有限公司 | Method for preparing aluminum oxide for catalyst |
| CN103008016A (en) * | 2012-10-31 | 2013-04-03 | 上海华明高纳稀土新材料有限公司 | High-thermostability aluminum oxide and preparation method thereof |
| CN103112881A (en) * | 2012-12-31 | 2013-05-22 | 内蒙古科技大学 | Method for preparing lanthanum aluminate powder efficiently |
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| 王同昆，等: ""氧化镧掺杂氧化铝的高温物相转变"", 《材料开发与应用》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105498760A (en) * | 2015-12-04 | 2016-04-20 | 中自环保科技股份有限公司 | Preparation method of hydrothermal-aging-resisting catalyst for exhaust treatment for natural-gas-fueled vehicle |
| CN105498760B (en) * | 2015-12-04 | 2018-03-13 | 中自环保科技股份有限公司 | A kind of water resistant heat ageing method for preparing catalyst for natural gas and auto tail gas processing |
| CN108906024A (en) * | 2018-07-20 | 2018-11-30 | 上海应用技术大学 | Catalyst for treating waste gas and preparation method thereof and purposes |
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Application publication date: 20131016 |