CN105597837A - Preparation method of automobile exhaust catalyst carrier - Google Patents
Preparation method of automobile exhaust catalyst carrier Download PDFInfo
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- CN105597837A CN105597837A CN201510720191.3A CN201510720191A CN105597837A CN 105597837 A CN105597837 A CN 105597837A CN 201510720191 A CN201510720191 A CN 201510720191A CN 105597837 A CN105597837 A CN 105597837A
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Abstract
The invention provides a preparation method of an automobile exhaust catalyst carrier. The method comprises the following steps: anodizing aluminum foil in a 0.3mol/L oxalic acid solution at room temperature under a voltage of 30-50V for 4h with aluminum foil as an anode and graphite as a cathode, putting the anodized aluminum foil in a 6wt% H3PO4 and 1.8wt% H2CrO4 mixed solution in 60DEG C water bath to remove a surface alumina layer, anodizing the aluminum foil in the 0.3mol/L oxalic acid solution at room temperature under a voltage of 30-50V for 2h, and corroding and oxidizing the aluminum foil in a 5% phosphoric acid solution at 30DEG C to obtain a nano-alumina template; slowly drying the nano-alumina template; and sintering the dried nano-alumina template in an inert gas at 1150-1250DEG C for 2-5h to obtain the catalyst carrier. The very uniform honeycomb alumina catalyst carrier with the aperture of several to dozens of nanometers is obtained through using general physical and chemical methods, so the method is simple and effective; and the catalyst carrier has very good heat stability and large internal surface area.
Description
Technical field
The present invention relates to a kind of preparation method of auto-exhaust catalyst carrier, belong to porous material preparation field.
Background technology
In recent years, along with the rapid growth of vehicle guaranteeding organic quantity, cause urban air pollution to be on the rise, the polluter such as CO, HC, NOx in vehicle exhaust becomes the main source of urban atmospheric pollution especially, and improving constantly vehicle emission standards becomes inexorable trend.
Metal beehive carrier has following advantage: thermal capacity is little, thermal conductivity is high, pre-good in thermal property, be easy to the short time heat up reach catalysis light-off temperature, therefore the use of metallic carrier can effectively improve the efficiency of motor vehicle tail gas catalytic purification processing under cold start-up, low speed, idling mode; Have the mechanical strength of higher heat shock resistance and vibrations, life cycle is long and installation is easy. We have started the research of metallic honeycomb substrate catalyst.
Summary of the invention
The invention provides a kind of preparation method of auto-exhaust catalyst carrier.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
A preparation method for auto-exhaust catalyst carrier, is characterized in that, comprises the following steps:
(1) using aluminium foil as anode, graphite is as negative electrode, in the oxalic acid solution of 0.3mol/L, anode alumina foil 4h under the voltage of room temperature and 30-50V, in the H3PO4 of 6wt% and the H2CrO4 mixed solution of 1.8wt%, in the water-bath of 60 DEG C, remove surface oxidation aluminium lamination, in the oxalic acid solution of 0.3mol/L, anode alumina foil 2h under the voltage of room temperature and 30-50V, corrosion oxidation aluminium foil at 30 DEG C of phosphoric acid solutions in 5%, obtains nano-alumina template;
(2) nano-alumina template is carried out to slowly dry processing;
(3) dried nano-alumina template is put into inert gas at 1150-1250 DEG C, and sintering time is 2-5h, obtains catalyst carrier.
Preferably, the water-bath equipment in step (1) adopts LH501-2 thermostat water bath.
Preferably, the anodic oxidation equipment in step (1) adopts YJ32-1 transistor npn npn direct current stabilizer.
Preferably, the treatment temperature of the dry run in step (2) is 150 DEG C, and the time is 2-3h.
The invention has the beneficial effects as follows: utilize general physics and chemistry method to obtain the cellular alumina catalyst carrier that aperture is a few to tens of nanometers very uniformly, method is simply effective.; There is good heat endurance simultaneously and there is large internal surface area.
Detailed description of the invention
Embodiment 1:
A preparation method for auto-exhaust catalyst carrier, comprises the following steps:
(1) using aluminium foil as anode, graphite is as negative electrode, in the oxalic acid solution of 0.3mol/L, in YJ32-1 transistor npn npn direct current stabilizer under the voltage of room temperature and 30V anode alumina foil 4h, in the H2CrO4 mixed solution of the H3PO4 of 6wt% in LH501-2 thermostat water bath and 1.8wt%, in the water-bath of 60 DEG C, remove surface oxidation aluminium lamination, in the oxalic acid solution of 0.3mol/L, anode alumina foil 2h under the voltage of room temperature and 30V, corrosion oxidation aluminium foil at 30 DEG C of phosphoric acid solutions in 5%, obtains nano-alumina template;
(2) nano-alumina template is carried out to slowly dry processing, temperature is 150 DEG C, and the time is 2h;
(3) dried nano-alumina template is put into inert gas at 1150 DEG C, and sintering time is 2h, obtains catalyst carrier.
Embodiment 2:
A preparation method for auto-exhaust catalyst carrier, comprises the following steps:
(1) using aluminium foil as anode, graphite is as negative electrode, in the oxalic acid solution of 0.3mol/L, in YJ32-1 transistor npn npn direct current stabilizer under the voltage of room temperature and 40V anode alumina foil 4h, in the H2CrO4 mixed solution of the H3PO4 of 6wt% in LH501-2 thermostat water bath and 1.8wt%, in the water-bath of 60 DEG C, remove surface oxidation aluminium lamination, in the oxalic acid solution of 0.3mol/L, anode alumina foil 2h under the voltage of room temperature and 40V, corrosion oxidation aluminium foil at 30 DEG C of phosphoric acid solutions in 5%, obtains nano-alumina template;
(2) nano-alumina template is carried out to slowly dry processing, temperature is 150 DEG C, and the time is 2.5h;
(3) dried nano-alumina template is put into inert gas at 1200 DEG C, and sintering time is 4h, obtains catalyst carrier.
Embodiment 3:
A preparation method for auto-exhaust catalyst carrier, comprises the following steps:
(1) using aluminium foil as anode, graphite is as negative electrode, in the oxalic acid solution of 0.3mol/L, in YJ32-1 transistor npn npn direct current stabilizer under the voltage of room temperature and 50V anode alumina foil 4h, in the H2CrO4 mixed solution of the H3PO4 of 6wt% in LH501-2 thermostat water bath and 1.8wt%, in the water-bath of 60 DEG C, remove surface oxidation aluminium lamination, in the oxalic acid solution of 0.3mol/L, anode alumina foil 2h under the voltage of room temperature and 50V, corrosion oxidation aluminium foil at 30 DEG C of phosphoric acid solutions in 5%, obtains nano-alumina template;
(2) nano-alumina template is carried out to slowly dry processing, temperature is 150 DEG C, and the time is 3h;
(3) dried nano-alumina template is put into inert gas at 1250 DEG C, and sintering time is 5h, obtains catalyst carrier.
Claims (6)
1. a preparation method for auto-exhaust catalyst carrier, is characterized in that, comprises the following steps:
(1) using aluminium foil as anode, graphite is as negative electrode, in the oxalic acid solution of 0.3mol/L, anode alumina foil 4h under the voltage of room temperature and 30-50V, in the H3PO4 of 6wt% and the H2CrO4 mixed solution of 1.8wt%, in the water-bath of 60 DEG C, remove surface oxidation aluminium lamination, in the oxalic acid solution of 0.3mol/L, anode alumina foil 2h under the voltage of room temperature and 30-50V, corrosion oxidation aluminium foil at 30 DEG C of phosphoric acid solutions in 5%, obtains nano-alumina template;
(2) nano-alumina template is carried out to slowly dry processing;
(3) dried nano-alumina template is put into inert gas at 1150-1250 DEG C, and sintering time is 2-5h, obtains catalyst carrier.
2. the preparation method of a kind of auto-exhaust catalyst carrier according to claim 1, is characterized in that, comprises the following steps:
(1) using aluminium foil as anode, graphite is as negative electrode, in the oxalic acid solution of 0.3mol/L, anode alumina foil 4h under the voltage of room temperature and 30V, in the H3PO4 of 6wt% and the H2CrO4 mixed solution of 1.8wt%, in the water-bath of 60 DEG C, remove surface oxidation aluminium lamination, in the oxalic acid solution of 0.3mol/L, anode alumina foil 2h under the voltage of room temperature and 30V, corrosion oxidation aluminium foil at 30 DEG C of phosphoric acid solutions in 5%, obtains nano-alumina template;
(2) nano-alumina template is carried out to slowly dry processing;
(3) dried nano-alumina template is put into inert gas at 1150 DEG C, and sintering time is 2h, obtains catalyst carrier.
3. the preparation method of a kind of auto-exhaust catalyst carrier according to claim 1, is characterized in that, comprises the following steps:
(1) using aluminium foil as anode, graphite is as negative electrode, in the oxalic acid solution of 0.3mol/L, anode alumina foil 4h under the voltage of room temperature and 50V, in the H3PO4 of 6wt% and the H2CrO4 mixed solution of 1.8wt%, in the water-bath of 60 DEG C, remove surface oxidation aluminium lamination, in the oxalic acid solution of 0.3mol/L, anode alumina foil 2h under the voltage of room temperature and 50V, corrosion oxidation aluminium foil at 30 DEG C of phosphoric acid solutions in 5%, obtains nano-alumina template;
(2) nano-alumina template is carried out to slowly dry processing;
(3) dried nano-alumina template is put into inert gas at 1250 DEG C, and sintering time is 5h, obtains catalyst carrier.
4. the preparation method of a kind of auto-exhaust catalyst carrier according to claim 1, is characterized in that, the water-bath equipment in step (1) adopts LH501-2 thermostat water bath.
5. the preparation method of a kind of auto-exhaust catalyst carrier according to claim 1, is characterized in that, the anodic oxidation equipment in step (1) adopts YJ32-1 transistor npn npn direct current stabilizer.
6. the preparation method of a kind of auto-exhaust catalyst carrier according to claim 1, is characterized in that, the treatment temperature of the dry run in step (2) is 150 DEG C, and the time is 2-3h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510720191.3A CN105597837A (en) | 2015-10-30 | 2015-10-30 | Preparation method of automobile exhaust catalyst carrier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510720191.3A CN105597837A (en) | 2015-10-30 | 2015-10-30 | Preparation method of automobile exhaust catalyst carrier |
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| CN105597837A true CN105597837A (en) | 2016-05-25 |
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| CN201510720191.3A Pending CN105597837A (en) | 2015-10-30 | 2015-10-30 | Preparation method of automobile exhaust catalyst carrier |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1593756A (en) * | 2004-07-05 | 2005-03-16 | 南京大学 | Preparation method of metal honeycomb supported catalyst |
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- 2015-10-30 CN CN201510720191.3A patent/CN105597837A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1593756A (en) * | 2004-07-05 | 2005-03-16 | 南京大学 | Preparation method of metal honeycomb supported catalyst |
Non-Patent Citations (1)
| Title |
|---|
| 曾佩兰: "化学组装法制备汽车尾气净化催化剂", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
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Application publication date: 20160525 |
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