CN104324716A - Monolithic catalyst for removing nitrogen oxides from mobile source waste gas and preparation method thereof - Google Patents
Monolithic catalyst for removing nitrogen oxides from mobile source waste gas and preparation method thereof Download PDFInfo
- Publication number
- CN104324716A CN104324716A CN201410427738.6A CN201410427738A CN104324716A CN 104324716 A CN104324716 A CN 104324716A CN 201410427738 A CN201410427738 A CN 201410427738A CN 104324716 A CN104324716 A CN 104324716A
- Authority
- CN
- China
- Prior art keywords
- catalyst
- nitrogen oxides
- waste gas
- integer catalyzer
- raw material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Catalysts (AREA)
Abstract
The invention provides a monolithic catalyst for removing nitrogen oxides from mobile source waste gas in order to satisfy the strength requirement on catalysts for removing nitrogen oxides from mobile source waste gas. The raw materials of the monolithic catalyst comprise inorganic fibers, and are characterized by also comprising silica sol and/or aluminum sol. Silica sol and/or aluminum sol are added into the raw materials of monolithic catalyst so as to increase the density of the catalyst after burning, thus the catalyst strength is increased, and the strength requirements on the catalysts for removing nitrogen oxides from mobile source waste gas are met.
Description
Technical field
The invention belongs to denitrating catalyst technology, particularly vapour Vehicular integral denitrating catalyst technology.
Background technology
Nitrogen oxide (NO in automotive exhaust
x), be the primary pollution source causing photochemical fog and acid rain.Effectively removing the way of nitrogen oxides of exhaust gas at present, is the exhaust gas denitration method of being carried out selective exposure reduction by ammonia as reducing agent.Titanium oxide (the TiO that the catalyst used is is active component with vanadium (V), molybdenum (Mo), tungsten (W)
2) series catalysts.
Above-mentioned catalyst is made into tabular, cellular and granular, is seated in reactor, and waste gas is removed by nitrogen oxide wherein after reactor.Catalyst will use the time of more than 2 years, therefore require that catalyst will have the high strength that wearing and tearing and defect do not occur for a long time, particularly in the travel mechanism such as automobile the catalyst of device except waste gas itself is to except the impact of catalyst, vibration in moving process also can aggravate the abrasion of catalyst, therefore higher to the requirement of intensity.
Summary of the invention
In order to meet moving source to the requirement of strength removing nitrogen oxides of exhaust gas catalyst, the invention provides the integer catalyzer of removing moving source nitrogen oxides of exhaust gas, there is high strength, be adapted to the working environment of moving source.
Another object of the present invention is to provide the preparation method of above-mentioned integer catalyzer.
Technical scheme of the present invention is as follows:
The integer catalyzer of removing moving source nitrogen oxides of exhaust gas, the raw material preparing described integer catalyzer comprises inorfil, also comprises Ludox and/or Alumina gel in described raw material, and described Ludox and/or Alumina gel account for less than 20% of raw material gross weight.
The length of described inorfil is 1-3 millimeter.
Described raw material comprises bentonite.
Prepare the method for above-mentioned integer catalyzer, comprise maintenance dry run, namely blank its environment temperature and humidity when drying keeps definite value in time.
Technique effect of the present invention:
In the raw material preparing integer catalyzer, be mixed into Ludox and/or Alumina gel, can strengthen the catalyst density after burning till, and then add the intensity of catalyst, but the density too high intensity that causes again on the contrary in hole declines, therefore, addition should be not too much.
The object adding inorfil in the raw materials of catalyst is the intensity in order to increase catalyst further, can solve the problem that in prior art, catalyst is excessively crisp simultaneously.
In the raw materials of catalyst, add the mouldability that bentonite is conducive to Kaolinite Preparation of Catalyst process Raw, and be conducive to reducing manufacturing cost.
From microcosmic aspect, the minute crack that adopt the method for maintenance drying to avoid in preparation method of the present invention catalyst base substrate microstress skewness that rapid draing causes causes, ensure that catalyst has higher intensity.
Detailed description of the invention
With lower part, technical scheme of the present invention is described in detail.
The integer catalyzer of removing moving source nitrogen oxides of exhaust gas, the raw material preparing this integer catalyzer comprises inorfil, and inorfil is high alumina glass fibre or borosilicate fiberglass or E glass fibre.Ludox and/or Alumina gel is also comprised in above-mentioned raw materials.In the raw material preparing integer catalyzer, be mixed into Ludox and/or Alumina gel, the catalyst density after burning till can be strengthened, and then add the intensity of catalyst.Also comprise bentonite in above-mentioned raw materials, in the raw material preparing integer catalyzer, be mixed into the mouldability that the good clay of the plasticity such as bentonite can be conducive in Kaolinite Preparation of Catalyst process, the improvement of processability is conducive to improving mechanical strength, and bulk property is strengthened.
The length of above-mentioned inorfil is 1-3 millimeter.The length of inorfil should be suitable, if too short, can not play the effect strengthening catalyst strength, may result in blockage again if oversize for the pore structure that catalyst has.
Below provide the method preparing integer catalyzer of the present invention:
A, preparation pre-burning powder: mixing titanium dioxide, tungsten and silicon powder, silicon powder is silica, and the diameter of silicon powder powder is 100 μm; Also need the interfacial agent being mixed into organic class, described interfacial agent is Ludox; Also need to be mixed into the inorfil being less than 30% with above-mentioned raw materials weight ratio;
B, in pre-burning powder, be mixed into water and surfactant and dispersant, mixture reaches the pug state being easy to shaping;
C, the pug obtained by step B carry out vacuum pugging;
D, the pug obtained by step C carry out extrusion molding;
E, maintenance drying is carried out to the blank of extrusion molding;
F, dried for maintenance blank is carried out sharp processing;
G, burn till the blank after sharp processing, firing temperature is 350 DEG C-600 DEG C, and preferably 550 DEG C, programming rate is 150 DEG C/h, and after reaching preset temperature, temperature retention time is 5 hours.
Claims (4)
1. remove the integer catalyzer of moving source nitrogen oxides of exhaust gas, the raw material preparing described integer catalyzer comprises inorfil, it is characterized in that also comprising Ludox and/or Alumina gel in described raw material, described Ludox and/or Alumina gel account for less than 20% of raw material gross weight.
2. integer catalyzer according to claim 1, is characterized in that the length of described inorfil is 1-3 millimeter.
3. integer catalyzer according to claim 1, is characterized in that described raw material comprises bentonite.
4. prepare the method for the described integer catalyzer of one of claims 1 to 3, it is characterized in that comprising maintenance dry run, namely blank its environment temperature and humidity when drying keeps definite value in time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410427738.6A CN104324716A (en) | 2013-12-19 | 2014-08-27 | Monolithic catalyst for removing nitrogen oxides from mobile source waste gas and preparation method thereof |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310707358 | 2013-12-19 | ||
| CN201310707358.3 | 2013-12-19 | ||
| CN201410427738.6A CN104324716A (en) | 2013-12-19 | 2014-08-27 | Monolithic catalyst for removing nitrogen oxides from mobile source waste gas and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104324716A true CN104324716A (en) | 2015-02-04 |
Family
ID=52399594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410427738.6A Pending CN104324716A (en) | 2013-12-19 | 2014-08-27 | Monolithic catalyst for removing nitrogen oxides from mobile source waste gas and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104324716A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108126730A (en) * | 2017-12-15 | 2018-06-08 | 中国第汽车股份有限公司 | Improve the method for integral extruding type honeycomb catalyst thermal conductivity factor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101502796A (en) * | 2009-03-20 | 2009-08-12 | 无锡市宜刚耐火材料有限公司 | Integral honeycomb selective catalytic reduction catalyst for flue gas denitration and method for preparing the same |
| CN101584997A (en) * | 2008-05-20 | 2009-11-25 | 揖斐电株式会社 | Honeycomb structure |
| CN102276288A (en) * | 2011-05-31 | 2011-12-14 | 宜兴王子制陶有限公司 | Preparation method of honeycomb ceramic having outer skin |
| CN102728343A (en) * | 2012-07-02 | 2012-10-17 | 长春市新瑞科贸有限责任公司 | Preparation method of denitration catalyst cellular module |
-
2014
- 2014-08-27 CN CN201410427738.6A patent/CN104324716A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101584997A (en) * | 2008-05-20 | 2009-11-25 | 揖斐电株式会社 | Honeycomb structure |
| CN101502796A (en) * | 2009-03-20 | 2009-08-12 | 无锡市宜刚耐火材料有限公司 | Integral honeycomb selective catalytic reduction catalyst for flue gas denitration and method for preparing the same |
| CN102276288A (en) * | 2011-05-31 | 2011-12-14 | 宜兴王子制陶有限公司 | Preparation method of honeycomb ceramic having outer skin |
| CN102728343A (en) * | 2012-07-02 | 2012-10-17 | 长春市新瑞科贸有限责任公司 | Preparation method of denitration catalyst cellular module |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108126730A (en) * | 2017-12-15 | 2018-06-08 | 中国第汽车股份有限公司 | Improve the method for integral extruding type honeycomb catalyst thermal conductivity factor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103769239B (en) | Honeycomb type denitrating catalyst with hierarchical porous structure and preparation method thereof | |
| KR101447945B1 (en) | Fabrication Method of Zeolite Honeycomb type Catalyst for Reducing Nitrogen Oxide | |
| CN110354843B (en) | Thin-wall honeycomb type low-temperature sulfur-resistant SCR denitration catalyst and preparation method thereof | |
| CN106824168B (en) | Catalyst for exhaust gas treatment and method for producing same | |
| CN106732751B (en) | Desulfurization and denitrification catalyst, and preparation method and use method thereof | |
| WO2017035848A1 (en) | Flue gas denitrification catalyst and preparation method thereof | |
| CN102698810B (en) | Honeycomb type denitration catalyst and preparation method thereof | |
| CN105435776A (en) | Honeycomb-like cerium-zirconium-tungsten-titanium-based denitration catalyst and preparation method thereof | |
| CN103877970A (en) | Honeycombed waste gas denitrification catalyst | |
| CN103252230A (en) | Method for preparing novel denitration catalyst | |
| CN105435769A (en) | Honeycomb-like cerium-zirconium-titanium-based denitration catalyst and preparation method thereof | |
| CN106140150A (en) | A kind of honeycomb fashion cerium zirconium manganese titanio denitrating catalyst and preparation method thereof | |
| CN104741113A (en) | Low-cost denitration catalyst and preparation method thereof | |
| CN113813955B (en) | Method for preparing denitration catalyst coating slurry by using municipal sludge | |
| CN106268786A (en) | A kind of low-temperature denitration catalyst and preparation method thereof | |
| CN107335423A (en) | A kind of honeycomb fashion is without vanadium cerium zirconium titanium denitrating catalyst and preparation method thereof | |
| CN114011400A (en) | Preparation method of acid system waste incineration SCR denitration catalyst and prepared denitration catalyst | |
| CN104324716A (en) | Monolithic catalyst for removing nitrogen oxides from mobile source waste gas and preparation method thereof | |
| KR101952314B1 (en) | Method of stacked hexagonal type catalyst cartridge for selective catalytic reduction and catalyst carrier using the same | |
| CN113769732A (en) | Medium-temperature flue gas SCR denitration catalyst and preparation method thereof | |
| KR101187758B1 (en) | METHOD FOR MANUFACTURING DE-NOx SCR CATALYST USING CALCIUM SULFATE HEMIHYDRATE | |
| CN103372425B (en) | Production process of SCR (selective catalytic reduction) catalyst with pyrophyllite as carrier | |
| CN105435765A (en) | Preparation method of denitration catalyst | |
| CN105413678A (en) | Honeycomb denitration catalyst with water resistance and preparation method therefor | |
| CN105367123A (en) | Motor vehicle exhaust purifier and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150204 |
|
| RJ01 | Rejection of invention patent application after publication |