CN101596403A - A kind of metal oxide catalyst is used for Selective Catalytic Reduction of NO xApplication - Google Patents
A kind of metal oxide catalyst is used for Selective Catalytic Reduction of NO xApplication Download PDFInfo
- Publication number
- CN101596403A CN101596403A CNA2009100162607A CN200910016260A CN101596403A CN 101596403 A CN101596403 A CN 101596403A CN A2009100162607 A CNA2009100162607 A CN A2009100162607A CN 200910016260 A CN200910016260 A CN 200910016260A CN 101596403 A CN101596403 A CN 101596403A
- Authority
- CN
- China
- Prior art keywords
- catalyst
- flue gas
- metal oxide
- application
- nitrogen oxides
- 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.)
- Granted
Links
Abstract
A kind of novel metal oxide catalyst is used for Selective Catalytic Reduction of NO
x, be reducing agent with the ammonia, load and non-loading type manganese based composite metal oxidate are catalyst, compound by a certain percentage, under certain air speed, nitrous oxides concentration, temperature and condition of normal pressure, and aerobic is when existing, remove nitrogen oxide in the flue gas, be translated into nitrogen.This catalyst preparation process is simple and safe, and is nontoxic, pollution-free, and is convenient to recycle.This method is compared with traditional handicraft, and technology is simple, and the sulfur poisoning-resistant ability is strong, the difficult obstruction, and the economic benefit height is easy to suitability for industrialized production.
Description
Technical field:
The present invention relates to a kind of manganese based selective catalyzing and reducing nitrogen oxides catalyst, belong to the SCR technical field.Catalyst involved in the present invention comprises ferromanganese catalyst manganese Al catalysts and their loaded catalyst.
Background research:
Since the eighties, many in the world countries have taked action of a series of countries and international collaborative program around NOx emission control problem.As far back as 1979, there are 33 countries to sign economic committee of the United Nations about the cross-border air pollution pact of the long distance in Europe.Formulated a protocol according to this pact in November, 1988, on require NOx discharging was frozen in 1987 in 1994 level of (or more early time).All signatory states all are required to adopt the NOx discharging of newly-increased stationary source of best practical technology control and moving source.Japan entered atmosphere in 1970 nitrogen oxide is 1,100,000 tons, forms Tokyo type photochemical fog in Tokyo July 18 then, causes serious consequence.So far, Japan begins to control nitrogen oxides pollution, and nitrous oxides concentrations in 1985 are reduced to the level of 0.25ppm; Germany also made strict gas pollutant emission limit in " large-scale combustion apparatus regulation " in 1984.The associated drain of the U.S. is advised in 2002 and is come into effect, and compares with rules in 1998, and the NOx limit value has been striden major step again forward, requires to reduce to 3.35g/kwh.Implemented lower NOx discharging limit 0.27g/kwh in 2007.
China's nitrogen oxides pollution present situation is serious equally, but pollutant control relatively lags behind with improvement.In Beijing, city such as Guangzhou, Shanghai, nitrogen oxide has become main atmosphere pollution.NOx surpasses national grade ii standard for years in the atmosphere of Guangzhou, begins to surpass SO2 from the pollutional load of Guangzhou NOx in 1992, and photochemical pollution occurs.The Shanghai air quality has been in the alarm level of intermediate pollution, and NOx then exceeds standard and reaches 106%.The NOx pollution condition also in progressively development, this shows in other big and medium-sized cities air, and the pollution control of NOx is extremely urgent.State Bureau of Environmental Protection also requires to carry out control since 2000 to the NOx in acid rain control district discharging, and the emitting nitride overall control was level in 2000 in the acid rain control district in 2010.At present, the discharging of motor vehicle NOx is just progressively cut down and is controlled by car tail-gas catalytic purifier, and the discharging in the flue gases such as stationary source such as power plant, Industrial Boiler does not then obtain due attention as yet.Therefore, strengthening administering stationary source NOx pollutes very urgent.
The catalytic component based on vanadium operating temperature of extensive use at present is higher, and device places before the desulfurization and dedusting, causes catalyst sulfur poisoning, obstruction etc. easily.And the low-temperature selective catalytic reduction catalyst-assembly can place after the desulfurization and dedusting, effectively avoids phenomenons such as catalyst sulfur poisoning and obstruction.Therefore, development of new low-temperature selective catalytic reduction catalyst becomes one of focus of people's research.
Summary of the invention:
Synthetic load of the present invention and non-loading type manganese Base Metal oxide as catalyst, are used for the selective catalytic reduction flue gas nitrogen oxide with it.To compare this catalyst activity temperature low with traditional catalytic component based on vanadium, after denitrification apparatus can place desulfurization and dedusting, effectively avoids sulfur poisoning and catalyst clogging, and preparation cost falls, long service life.
Principle of the present invention: adopt and to have designed the NOx SCR performance that fixed bed NOx selectivity evaluation system for catalytic performance comes the testing catalytic system voluntarily, experimental provision as shown in Figure 1.At first be that 99.99% NO gas charges in the steel cylinder, charge into an amount of high-purity He again by controlled pressure then, be mixed with through the NO carrier gas of dilution once with an amount of purity.Open high-pure helium and NO carrier gas, be adjusted to desired concn, measure NO concentration in the gas circuit, after waiting to stablize, feed NH3 and oxygen, and mist is passed through catalyst.This experimental simulation flue gas is that concentration is 1742mg/m
3NO gas about (1300ppm, volume fraction).NO gas and He, O
2, NH
3Enter fixed bed catalytic reactor and carry out the NOx selective catalytic reduction reaction after blender mixes, adopting internal diameter is that the quartz glass tube of 8mm is as fixed bed catalytic reactor.The bed reaction temperature of this experiment is 50-150 ℃, adopts the tube furnace heating, digital temperature control instrument temperature control.Adopt the intelligent flue gas analyzer to carry out tail gas NO
x(NO and NO
2) concentration monitoring.Adopting chromatographic column is the gas-chromatography of 3 meters long 5A molecular sieves, analyzes N with thermal conductivity method
2Concentration, thereby calculate its selectivity.Wherein leaning on room temperature is 100 ℃, and sensing chamber and vaporizer all are 80 ℃.
The invention provides the application that a kind of O composite metallic oxide catalyst is used for selective catalyst reduction of nitrogen oxides, it is characterized in that: with composite metal oxide as catalyst, under 50-150 ℃ and condition of normal pressure, feed flue gas, reach the purpose of the nitrogen oxide in the flue gas; The air speed scope of flue gas is 8000～40000h
-1, the shared volumetric concentration scope of oxygen is 0%～15% in the flue gas, the shared volumetric concentration scope of nitrogen oxide is 800～1500ppm in the flue gas.
Preferably, temperature is 100-150 ℃, and the air speed scope of flue gas is 8000～20000h
-1, carrier of oxygen volume concentrations scope 6%～10% in the flue gas.
Preferably, also comprise reducing gas in the flue gas, described reducing gas is selected from ammonia, concentration range 800～1500ppm, volume ratio.
Preferably, described catalyst is a manganese Base Metal oxide, and described manganese Base Metal oxide is selected from Mn-AlO
xOr Mn-FeO
x, x=2～5 wherein, the ratio of Mn and Al or iron is 1: 9～9: 1, mol ratio.
Preferably, described catalyst comprises manganese Base Metal oxide and carrier, and described manganese Base Metal oxide is selected from Mn-AlO
xOr Mn-FeO
x, x=2～5 wherein, the ratio of Mn and Al or iron is 1: 9～9: 1, mol ratio; Described carrier is selected from TiO
2, SnO
2Or mesoporous Fe
2O
3
Preferably, described catalyst is selected from Mn-AlO
x/ mesoporous Fe
2O
3, Mn-AlO
x/ TiO
2, Mn-AlO
x/ SnO
2, Mn-FeO
x/ TiO
2, Mn-FeO
x/ SnO
2Or Mn-FeO
x/ mesoporous Fe
2O
3Those skilled in the art can select the load ratio according to actual needs arbitrarily.
Preferably, described catalyst particle size scope 10～100 orders.
A kind of metal oxide catalyst is used for Selective Catalytic Reduction of NO
xApplication, comprise the steps:
1. catalyst is synthetic
Take by weighing a certain proportion of manganese nitrate, aluminum nitrate and carrier, and be dissolved in the water, stir down the slowly excessive ammonium carbonate of adding, generate flocculent deposit, 120 ℃ of dryings of constant temperature 12 hours are taken out back 300 ℃ of calcinings 1 hour in tube furnace, are warmed up to 500 ℃ of calcinings 6 hours then.
Take by weighing a certain proportion of manganese nitrate, ferric nitrate and carrier, and be dissolved in the water, stir down the slowly excessive ammonium carbonate of adding, generate flocculent deposit, 120 ℃ of dryings of constant temperature 12 hours are taken out back 300 ℃ of calcinings 1 hour in tube furnace, are warmed up to 500 ℃ of calcinings 6 hours then.
Synthetic support type manganese Base Metal oxide catalyst has 6 kinds, can select the load ratio arbitrarily, and is as shown in the table:
2. the removal of nitrogen oxide
Catalyst is ground to the particle of certain order number (10～100 order), tail gas is fed in the reactor that manganese Base Metal oxide catalyst is housed to remove nitrogen oxide in the tail gas.
Innovative point of the present invention is to prepare first support type and non-loading type manganese Al catalysts is used for SCR, realize that efficient cryogenic SCR, catalyst environment close friend, process equipment are simple, new catalyst can replace traditional catalyst to a great extent, is easy to industrial production and promotes.This catalyst preparation process is simple and safe, and is nontoxic, pollution-free, and is convenient to recycle.This method is compared with traditional handicraft, and technology is simple, and the sulfur poisoning-resistant ability is strong, the difficult obstruction, and the economic benefit height is easy to suitability for industrialized production.
Description of drawings
Fig. 1 is NO
xSCR evaluation system for catalytic performance installation drawing.Wherein 1: high-purity He, 2:NOx diluent gas, 3: oxygen, 4: ammonia gas, 5: one-way control valve, 6: mass flow controller, 7: the rotor flow controller, 8: gas mixer, 9: tube furnace, 10: triple valve, 11:NO portable intelligent analyzer, 12:NO2 portable intelligent analyzer, 13: evacuated tube
The specific embodiment:
The present invention illustrates with following embodiment, but the present invention is not limited to following embodiment, under the scope of described aim, changes and implements all to be included in the technical scope of the present invention before and after not breaking away from.
Embodiment 1: manganese aluminum composite metal oxide catalyst, wherein the manganese al mole ratio is 9: 1.
The Preparation of catalysts method is: take by weighing manganese nitrate 32.175g, aluminum nitrate 3.78g, and be dissolved in the 50ml water, stir and slowly add ammonium carbonate 8g (pulverulent solids) down, generate flocculent deposit, 120 ℃ of dryings of constant temperature 12 hours, take out back 300 ℃ of calcinings 1 hour in tube furnace, be warmed up to 500 ℃ of calcinings then and obtain the manganese aluminum composite metal oxide after 6 hours.
Experimental provision as shown in Figure 1.At first be that 99.99% NO gas charges in the steel cylinder, charge into an amount of high-purity He again by controlled pressure then, be mixed with through the NO carrier gas of dilution once with an amount of purity.Open high-pure helium and NO carrier gas, be adjusted to desired concn, measure NO concentration in the gas circuit, after waiting to stablize, feed NH3 and oxygen, and mist is passed through catalyst.At nitrous oxides concentration is 1125ppm, and ammonia concentration is 1037ppm, air speed 11943h
-1, oxygen content 8%, during bed temperature 423K, transformation efficiency of the oxides of nitrogen is 99.53%, the nitrogen selectivity is 71.68% (described percentage, ppm are volume ratio).
Embodiment 2: the ferromanganese O composite metallic oxide catalyst, wherein the ferromanganese mol ratio is 7: 3.
The Preparation of catalysts method is: take by weighing manganese nitrate 32.175g, ferric nitrate 15.56g, and be dissolved in the 50ml water, stir and slowly add ammonium carbonate 8g (pulverulent solids) down, generate flocculent deposit, 120 ℃ of dryings of constant temperature 12 hours, take out back 300 ℃ of calcinings 1 hour in tube furnace, be warmed up to 500 ℃ of calcinings then and obtain the ferromanganese composite metal oxide after 6 hours.
Other is with embodiment 1, and difference is: at nitrous oxides concentration is 1213ppm, and ammonia concentration is 1037ppm, air speed 8957h
-1, oxygen content 8%, during bed temperature 393K, transformation efficiency of the oxides of nitrogen is 93.88%, the nitrogen selectivity is 75.24% (described percentage, ppm are volume ratio).
Embodiment 3: mol ratio is that 9: 1 moles such as manganese aluminum composite metal oxide load to SnO
2Supported catalyst.
The Preparation of catalysts method is: take by weighing manganese nitrate 32.175g, aluminum nitrate 3.78g and SnO
2Carrier 15.069g, and be dissolved in the water, stir and slowly add 10g ammonium carbonate (pulverulent solids) down, generate flocculent deposit, 120 ℃ of dryings of constant temperature 12 hours, take out back 300 ℃ of calcinings 1 hour in tube furnace, be warmed up to 500 ℃ of calcinings then after 6 hours, obtaining mol ratio is that 9: 1 moles such as manganese aluminum composite metal oxide load to SnO
2Supported catalyst.
Other is with embodiment 1, and difference is: at nitrous oxides concentration is 1213ppm, and ammonia concentration is 1037ppm, air speed 14331h
-1, oxygen content 8%, during bed temperature 393K, transformation efficiency of the oxides of nitrogen is 91.57%, the nitrogen selectivity is 80.17% (described percentage, ppm are volume ratio).
Embodiment 4: mol ratio is that 7: 3 moles such as ferromanganese composite metal oxide load to SnO
2The catalyst that obtains on the carrier.
The Preparation of catalysts method is: take by weighing manganese nitrate 32.175g, ferric nitrate 15.56g and SnO
2Carrier 15.069g, and be dissolved in the water, stir and slowly add 10g ammonium carbonate (pulverulent solids) down, generate flocculent deposit, 120 ℃ of dryings of constant temperature 12 hours, take out back 300 ℃ of calcinings 1 hour in tube furnace, be warmed up to 500 ℃ of calcinings then after 6 hours, the moles such as manganese aluminum composite metal oxide that obtain mol ratio and be 7: 3 load to SnO
2Supported catalyst.
Other is with embodiment 1, and difference is: at nitrous oxides concentration is 898ppm, and ammonia concentration is 1037ppm, air speed 17914h
-1, oxygen content 8%, during bed temperature 393K, transformation efficiency of the oxides of nitrogen is 89.72%, the nitrogen selectivity is 72.54% (described percentage, ppm are volume ratio).
Embodiment 5: mol ratio is 9: 1 manganese aluminum composite metal oxide catalyst.
The preparation method is with embodiment 1, and other is with embodiment 1, and difference is: at nitrous oxides concentration is 898ppm, and ammonia concentration is 1037ppm, air speed 17914h
-1, oxygen content 0%, during bed temperature 393K, transformation efficiency of the oxides of nitrogen is 26.03%, the nitrogen selectivity is 95.81% (described percentage, ppm are volume ratio).
Embodiment 6: mol ratio is 9: 1 manganese aluminum composite metal oxide catalyst.
The preparation method is with embodiment 1, and other is with embodiment 1, and difference is: at nitrous oxides concentration is 965.2ppm, and ammonia concentration is 1037ppm, air speed 35828h
-1, oxygen content 8%, during bed temperature 353K, transformation efficiency of the oxides of nitrogen is 54.30%, the nitrogen selectivity is 43.5% (described percentage, ppm are volume ratio).
Claims (7)
1. an O composite metallic oxide catalyst is used for the application of selective catalyst reduction of nitrogen oxides, it is characterized in that: with composite metal oxide as catalyst, under 50-150 ℃ and condition of normal pressure, feed flue gas, reach the purpose of the nitrogen oxide in the flue gas; The air speed scope of flue gas is 8000～40000h
-1, the shared volumetric concentration scope of oxygen is 0%～15% in the flue gas, the shared volumetric concentration scope of nitrogen oxide is 800～1500ppm in the flue gas.
2. an O composite metallic oxide catalyst as claimed in claim 1 is used for the application of selective catalyst reduction of nitrogen oxides, and it is characterized in that: temperature is 100-150 ℃, and the air speed scope of flue gas is 8000～20000h
-1, carrier of oxygen volume concentrations scope 6%～10% in the flue gas.
3. an O composite metallic oxide catalyst as claimed in claim 1 is used for the application of selective catalyst reduction of nitrogen oxides, and it is characterized in that: also comprise reducing gas in the flue gas, described reducing gas is selected from ammonia, concentration range 800～1500ppm, volume ratio.
4. an O composite metallic oxide catalyst as claimed in claim 1 is used for the application of selective catalyst reduction of nitrogen oxides, and it is characterized in that: described catalyst is a manganese Base Metal oxide, and described manganese Base Metal oxide is selected from Mn-AlO
xOr Mn-FeO
x, x=2～5 wherein, the ratio of Mn and Al or iron is 1: 9～9: 1, mol ratio.
5. an O composite metallic oxide catalyst as claimed in claim 1 is used for the application of selective catalyst reduction of nitrogen oxides, and it is characterized in that: described catalyst comprises manganese Base Metal oxide and carrier, and described manganese Base Metal oxide is selected from Mn-AlO
xOr Mn-FeO
x, x=2～5 wherein, the ratio of Mn and Al or iron is 1: 9～9: 1, mol ratio; Described carrier is selected from TiO
2, SnO
2Or mesoporous Fe
2O
3
6. an O composite metallic oxide catalyst as claimed in claim 1 is used for the application of selective catalyst reduction of nitrogen oxides, and it is characterized in that: described catalyst is selected from Mn-AlO
x/ mesoporous Fe
2O
3, Mn-AlO
x/ TiO
2, Mn-AlO
x/ SnO
2, Mn-FeO
x/ TiO
2, Mn-FeO
x/ SnO
2Or Mn-FeO
x/ mesoporous Fe
2O
3, those skilled in the art can select the load ratio according to actual needs arbitrarily.
7. an O composite metallic oxide catalyst as claimed in claim 1 is used for the application of selective catalyst reduction of nitrogen oxides, it is characterized in that: described catalyst particle size scope 10～100 orders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100162607A CN101596403B (en) | 2009-06-23 | 2009-06-23 | Application of metallic oxide catalyst for selective catalytic reduction of NOx |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100162607A CN101596403B (en) | 2009-06-23 | 2009-06-23 | Application of metallic oxide catalyst for selective catalytic reduction of NOx |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101596403A true CN101596403A (en) | 2009-12-09 |
| CN101596403B CN101596403B (en) | 2012-02-01 |
Family
ID=41418109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100162607A Expired - Fee Related CN101596403B (en) | 2009-06-23 | 2009-06-23 | Application of metallic oxide catalyst for selective catalytic reduction of NOx |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101596403B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101879452A (en) * | 2010-07-09 | 2010-11-10 | 清华大学 | Manganese-based low-temperature denitration catalyst and preparation method thereof |
| CN102019188A (en) * | 2010-12-20 | 2011-04-20 | 浙江天蓝环保技术有限公司 | Magnetic catalyst for denitration of NH3-SCR smoke and application thereof |
| CN103769113A (en) * | 2013-12-09 | 2014-05-07 | 广西大学 | Supported binary metal oxide nano-catalyst and preparation method thereof |
| WO2016078292A1 (en) * | 2014-11-18 | 2016-05-26 | 福州大学 | Sulfur dioxide-resistant low temperature manganese-iron oxide denitrification catalyst and preparation method thereof |
| CN111589441A (en) * | 2020-04-22 | 2020-08-28 | 中国科学技术大学 | Manganese-doped tungsten oxide catalyst, and preparation method and application thereof |
| CN115350701A (en) * | 2022-08-04 | 2022-11-18 | 国网湖北省电力有限公司黄石供电公司 | Defect-site-rich desulfurization additive and application thereof in calcium-based desulfurizer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6129898A (en) * | 1998-08-17 | 2000-10-10 | Ford Global Technologies, Inc. | NOx trap catalyst for lean burn engines |
| CN100542670C (en) * | 2005-06-24 | 2009-09-23 | 湘潭大学 | Low temperature multicomponent catalyst in a kind of denitrating flue gas and preparation method thereof |
-
2009
- 2009-06-23 CN CN2009100162607A patent/CN101596403B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101879452A (en) * | 2010-07-09 | 2010-11-10 | 清华大学 | Manganese-based low-temperature denitration catalyst and preparation method thereof |
| CN101879452B (en) * | 2010-07-09 | 2012-08-22 | 清华大学 | Manganese-based low-temperature denitration catalyst and preparation method thereof |
| CN102019188A (en) * | 2010-12-20 | 2011-04-20 | 浙江天蓝环保技术有限公司 | Magnetic catalyst for denitration of NH3-SCR smoke and application thereof |
| CN102019188B (en) * | 2010-12-20 | 2013-05-08 | 浙江天蓝环保技术股份有限公司 | Magnetic catalyst for denitration of NH3-SCR smoke and application thereof |
| CN103769113A (en) * | 2013-12-09 | 2014-05-07 | 广西大学 | Supported binary metal oxide nano-catalyst and preparation method thereof |
| WO2016078292A1 (en) * | 2014-11-18 | 2016-05-26 | 福州大学 | Sulfur dioxide-resistant low temperature manganese-iron oxide denitrification catalyst and preparation method thereof |
| CN111589441A (en) * | 2020-04-22 | 2020-08-28 | 中国科学技术大学 | Manganese-doped tungsten oxide catalyst, and preparation method and application thereof |
| CN111589441B (en) * | 2020-04-22 | 2021-07-06 | 中国科学技术大学 | Manganese-doped tungsten oxide catalyst, and preparation method and application thereof |
| CN115350701A (en) * | 2022-08-04 | 2022-11-18 | 国网湖北省电力有限公司黄石供电公司 | Defect-site-rich desulfurization additive and application thereof in calcium-based desulfurizer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101596403B (en) | 2012-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101596403B (en) | Application of metallic oxide catalyst for selective catalytic reduction of NOx | |
| CN103055848B (en) | Rare-earth doped low-temperature denitration catalyst and preparation method thereof | |
| CN100518931C (en) | Catalyst for eliminating carbon smoke from copper and cerium and preparing method | |
| CN102527369A (en) | Reduction denitration catalyst for activated carbon loaded rare-earth metal oxide, as well as preparation method and application thereof | |
| CN102631921B (en) | Nitric acid exhaust gas denitration catalyst and preparation method thereof | |
| CN102626653B (en) | Preparation method of SAPO-18-carried Cu-Fe catalyst for ammonia-selective catalytic elimination of NOx | |
| CN102407113A (en) | Microwave catalyst and application method thereof | |
| WO2012119299A1 (en) | Flue gas denitration catalyst, preparation method and use thereof | |
| CN105879879B (en) | A kind of high sulfur resistive ultralow temperature SCR denitration and preparation method thereof | |
| CN101693192B (en) | Process for preparing nitric oxide adsorbent with high adsorption capacity | |
| CN106732581B (en) | Ru/CeTiO for low-temperature SCR reactionxProcess for preparing catalyst | |
| CN101773837A (en) | Supported SCR denitration catalyst of medium and low temperature flue gas and preparation method and application thereof | |
| CN101507928A (en) | Ferro manganese composite oxides catalyst and preparation method and use thereof | |
| CN102861565A (en) | Aluminum oxide-loaded cerium oxide catalyst and preparation method and application thereof | |
| CN103801288B (en) | For the composite oxide catalysts and preparation method thereof of oxidation of nitric oxide | |
| CN103143345A (en) | Composite catalyst for catalytically oxidizing nitrogen oxide and preparation method of composite catalyst | |
| CN103301863A (en) | Steel-slag-based selective catalytic reduction (SCR) denitration catalyst and preparation method thereof | |
| CN102151585A (en) | Melamine-supported denitration catalyst and preparation method thereof | |
| CN107261844A (en) | A kind of production technology of the urea for vehicle containing nm-class catalyst | |
| CN104772038A (en) | Method for purifying acrylonitrile apparatus absorbing tower tail gas by using Pd-CeO2/Me-beta molecular sieve | |
| CN103736481A (en) | CeO2-MoO3/graphene low-temperature denitration catalyst and preparation method | |
| CN103263848A (en) | Flue gas treatment method of catalysis and simultaneous desulfurization and denitrification | |
| CN102068994A (en) | Catalyst and preparation method thereof | |
| CN104772037A (en) | Method for purifying acrylonitrile apparatus absorbing tower tail gas by using Pd-CeO2/Me-SAPO molecular sieve | |
| CN107983354B (en) | Preparation method of alkali poisoning resistant copper-based spinel low-temperature denitration catalyst |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120201 Termination date: 20120623 |