CN105435541A - Filtering mesh capable of preventing and controlling haze - Google Patents

Filtering mesh capable of preventing and controlling haze Download PDF

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Publication number
CN105435541A
CN105435541A CN201510779627.6A CN201510779627A CN105435541A CN 105435541 A CN105435541 A CN 105435541A CN 201510779627 A CN201510779627 A CN 201510779627A CN 105435541 A CN105435541 A CN 105435541A
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Prior art keywords
catalyst
screen pack
layer
active component
mol ratio
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CN201510779627.6A
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Chinese (zh)
Inventor
沈秋
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Wuxi Qingyang Machinery Manufacturing Co Ltd
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Wuxi Qingyang Machinery Manufacturing Co Ltd
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Priority to CN201510779627.6A priority Critical patent/CN105435541A/en
Publication of CN105435541A publication Critical patent/CN105435541A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/58—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B01D53/46—Removing components of defined structure
    • B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8637—Simultaneously removing sulfur oxides and nitrogen oxides
    • 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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
    • B01J29/78—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J29/7815—Zeolite Beta
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/302—Sulfur oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/40—Nitrogen compounds
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Health & Medical Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Catalysts (AREA)

Abstract

The invention discloses a filtering mesh capable of preventing and controlling haze. The filtering mesh comprises an edge frame, wherein at least six layers of mesh-shaped structures are fixedly arranged in the edge frame; each mesh-shaped structure is overlaid with a metal mesh supporting layer, a porous fibre layer, an activated carbon layer, a catalyzing layer, a porous fibre layer and a metal mesh supporting layer in sequence from inside to outside. After haze air passes through the filtering mesh, the content of PM2.5 particles, nitric oxides and sulfur oxides is reduced to an extremely low level, so that air in a car is effectively purified, and the health of respiratory systems of persons in the car can be protected.

Description

A kind of screen pack preventing and treating haze
Technical field
The present invention relates to automobile air purifying field, be specifically related to a kind of screen pack preventing and treating haze.
Background technology
Haze weather is a kind of atmosphere pollution state, haze is the general statement to suspended particulate substance content overproof various in air, and especially PM2.5 (equivalent aerodynamic diameter is less than or equal to the particle of 2.5 microns) is considered to " arch-criminal " that cause haze weather.
The aerosol systems that mist is made up of the small water droplet be suspended in a large number in surface air or ice crystal.Come across autumn and winter season, be the product of ground layer water in air vapour condensation (or sublimating) more.The existence of mist can reduce air transparency, make visibility deterioration, if the horizontal visibility of object is reduced within 1000 meters, just the weather phenomenon of the condensation vapor be suspended in surface air (or sublimating) thing is called mist (Fog).
Haze, also claims the particle such as dust, sulfuric acid, nitric acid, organic hydrocarbon compounds in gray haze (smog) air that air also can be made muddy.The horizontal visibility of object is called mist or mist (Mist) in this phenomenon of 1000-10000 rice.Formed mist time atmospheric humidity should be saturated (when existing if any a large amount of nuclei of condensation, relative humidity not necessarily reach 100% just may occur saturated).Due to the mist scattering of aqueous water or ice crystal composition light and wavelength relationship not quite, thus mist seems to be creamy white or Bluish white and grey.Sulfur dioxide, nitrogen oxide and pellet are the main compositions of haze.
2013, " haze " became annual keyword.In the January of this year, 4 times haze process shrouds 30 provinces (district, city), and in Beijing, only having 5 days is not haze sky.Have report display, in 500 cities of Largest In China, only reach the air quality standard of world health organisation recommendations less than the city of 1%, meanwhile, polluting 10 the most serious cities in the world has 7 in China.
The harm that haze produces human body is as follows:
(1) on the impact of respiratory system
The constituent of haze is very complicated, comprises hundreds of Atmospheric Chemistry particulate matter.The particulate that the mainly diameter be wherein harmful to health is less than 10 microns, as mineral grain thing, sea salt, sulfate, nitrate, Organic aerosol particle, fuel and automobile exhaust gas etc., it directly can enter and stick in human respiratory tract and alveolar.Especially submicron particle can be deposited in upper and lower respiratory tract and alveolar respectively, causes the illness such as acute rhinitis and acute bronchitis.For chronic respiratory disease patients such as bronchial astehma, chronic bronchitis, obstructive emphysema and COPDs, haze weather can make state of an illness acute attack or acute exacerbation.If be in this environment for a long time also can bring out lung cancer.
(2) on the impact of cardiovascular system
Haze sky is also very serious on the impact of human body cardiovascular and cerebrovascular disease, normal blood circulation can be hindered, cause cardiovascular disease, hypertension, coronary heart disease, cerebral hemorrhage, angina pectoris, miocardial infarction, heart failure etc. may be brought out, make chronic bronchitis occur cor pulmonale etc.
In addition, thick fog weather pressure ratio is lower, and people can produce a kind of sensation of agitation, and blood pressure can increase naturally to some extent.On the one hand often temperature is lower the greasy weather again, and some hypertension, patients with coronary heart disease go to suddenly cold outdoor from warm indoor, blood vessel expands with heat and contract with cold, and blood pressure also can be made to raise, cause the generation of apoplexy, myocardial infarction.The careful reply so heart and brain blood patient must take medicine on time.
(3) haze weather also can cause that surface layer is ultraviolet to be weakened, and make the increased activity of the infectiousness germ in air, infectious disease increases.
(4) child growth is unfavorable for.Because sunshine in greasy weather reduces, children's Ultraviolet radiation is not enough, and in body, vitamin D generates not enough, greatly reduces, serious meeting causes Infant Rickets, children growth slows down to the absorption of calcium.
(5) mental health is affected
Expert points out, there is impact in the lasting large greasy weather on the psychology of people and health, and say psychologically, the large greasy weather can cause oppressiveness, oppressive impression to people, can stimulate or aggravate the state of mental depression.In addition, due to the low pressure that greasy weather light is more weak and cause, some people can produce spiritual sluggishness, listless phenomenon in the greasy weather.
(6) fecundity is affected
There are some researches show, be exposed to the crowd in the air of high density pollution for a long time, the success rate of its sperm the time of fertilization in vitro may reduce.Researcher has also found the association between toxic air and male fecundity decline.
On November 5th, 2013, " climate change Green Book: reply climate change report (2013) " that the Chinese Academy of Social Sciences, China Meteorological Administration combine issue is pointed out, immediate and mid-term China haze weather is totally in increase trend.Wherein, mist number of days is in obviously reducing, and haze number of days obviously increases, and continuation haze process increases significantly.
At present, along with traffic congestion, people treat more and more for a long time in the various vehicles, and because motor space is narrow and small, its impact by haze is the hugest.Automobile, for the purification of air in car, is generally carry out adsorption filtration purification by screen pack.
CN104043298A discloses a kind of car filters net, include housing, the top of described housing is provided with air inlet, the bottom of described housing is provided with air outlet, filament nonwoven filter cloth filter core is provided with in described housing, described filament nonwoven filter cloth filter core is formed by multilayer filament nonwoven filter cloth is stacked, it is characterized in that: be provided with layer of active carbon filter core below the inherent described filament nonwoven filter cloth filter core of described housing, described active carbon filter core comprises the active carbon be wrapped in non-woven fabrics.
The screen pack of prior art is all by filter or being used for of adsorbing purifies air, but nitrogen oxide in air or oxysulfide be not by filtering or Adsorption.
Summary of the invention
The object of the invention is to propose a kind of screen pack preventing and treating haze, this screen pack can purify haze air, and by the sulfur and nitrogen oxides fast decoupled in air, can effective purifying in-vehicle air.
For reaching this object, the present invention by the following technical solutions:
A kind of gas screen pack, described screen pack comprises frame, frame internal fixtion has at least 6 layers of network structure, and described network structure from inside to outside laminated structure has woven wire supporting layer, porous fiber layer, active carbon layer, catalyst layer, porous fiber layer and woven wire supporting layer; Described catalyst is made up of grained catalyst, and it comprises carrier, active component and co-catalyst, it is characterized in that,
Described carrier is β zeolite, and in the skeleton structure of zeolite, Si/ (Si+Al+P) mol ratio is 0.30;
Described active component is the V doped with Ce 2o 5/ (MoO 3) x(WO 3) 1-xwith TiO 2mixture, Ce:V 2o 5/ (MoO 3) x(WO 3) 1-x: TiO 2mol ratio be 0.25:1:2, and described titanium dioxide is anatase crystal, and described active component weight content is in the catalyst 0.3%-10%, preferred 0.5-%-8%, more preferably 2%-5%.Such as, 0.8%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%.Described x is 0.1-0.5, such as 0.2,0.3,0.4.
Described co-catalyst is silver and palladium, and silver is 2:5 with the mol ratio of palladium, and described co-catalyst weight content is in the catalyst 0.3%-6%, preferred 0.5%-5%.Such as, 0.8%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%.
Preferably, the weight ratio of described active component and co-catalyst is 5:1 ~ 2:1.Such as 4.5:1,4:1,3.5:1,3:1,2.5:1.
The preparation method of described catalyst can take conventional infusion process and other alternatives, the prior art unrestricted choice that those skilled in the art can grasp according to it, and the present invention repeats no more.
Described active carbon layer comprises following component:
A) the β type ferrosilite of 20%-60%, shown in described β type ferrosilite is composed as follows:
(x+y)M (2/n)O·xFe 2O 3·yAl 2O 3·zSiO 2·wH 2O
In formula, M represents cation, and n is the valence of cation M, x+y+z=1, z/x to be 100-220, w be more than 1 positive integer; Its SiO 2/ Al 2o 3mol ratio be 550-800;
B) GdFeO doped with Ce of 10%-30% 3with TiO 2mixture, Ce:GdFeO 3: TiO 2mol ratio be 0.25:1:2, and described titanium dioxide is anatase crystal;
C) active carbon of surplus.
The present invention by choosing specific β zeolite as carrier, and chooses the V doped with Ce of special ratios 2o 5/ (MoO 3) x(WO 3) 1-xwith TiO 2mixture is as active component, and silver and palladium, as co-catalyst, make this catalyst produce cooperative effect, by choosing specific component A and B component, makes this screen pack produce cooperative effect.Be applied to screen pack interlayer, haze air is after described screen pack, and PM2.5 particle, nitrogen oxide and oxysulfide are all reduced to pole low-level, has effectively purified air in car, protects the respiratory health of occupant.
Detailed description of the invention
The present invention is described screen pack of the present invention by following embodiment.
Embodiment 1
Prepare catalyst by infusion process, carrier is β zeolite, and in the skeleton structure of zeolite, Si/ (Si+Al+P) mol ratio is 0.30, and described active component is the V doped with Ce 2o 5/ (MoO 3) x(WO 3) 1-xwith TiO 2mixture, Ce:V 2o 5/ (MoO 3) x(WO 3) 1-x: TiO 2mol ratio be 0.25:1:2, and described titanium dioxide is anatase crystal, and described active component weight content is in the catalyst 4%, and described x is 0.25;
Described co-catalyst is silver and palladium, and silver is 2:5 with the mol ratio of palladium, and described co-catalyst weight content is in the catalyst 1%.
Described active carbon layer comprises following composition:
A) the β type ferrosilite of 40%, shown in described β type ferrosilite is composed as follows:
(x+y)M (2/n)O·xFe 2O 3·yAl 2O 3·zSiO 2·wH 2O
In formula, M represents Ce, and n is the valence of cation M, and x+y+z=1, z/x are 150, w is 2;
B) GdFeO doped with Ce of 30% 3with TiO 2mixture, Ce:GdFeO 3: TiO 2mol ratio be 0.25:1:2, and described titanium dioxide is anatase crystal;
C) active carbon of surplus.
Described screen pack comprises frame, and frame internal fixtion has at least 6 layers of network structure, and described network structure from inside to outside laminated structure has woven wire supporting layer, porous fiber layer, active carbon layer, catalyst layer, porous fiber layer and woven wire supporting layer.
Test when PM2.5 is 300, described contaminated air is passed through described screen pack with the speed of 1 meter per second close to respiration rate, test the air through filter screen process, its PM2.5 value is 4, the content of nitrogen oxide and oxysulfide all drops to less than 0.05 milligram/cubic metre, is far smaller than the requirement of the Indoor Air Quality standards that GB/T18883-2002 specifies.
Comparative example 1
Component A content 70%, not containing B component, all the other conditions are constant, and PM2.5 value is 56, and the value of nitrogen oxide and oxysulfide is all higher than 1 milligram/cubic metre.
Comparative example 2
B component content 70%, not containing component A, all the other conditions are constant, and PM2.5 value is 47, and the value of nitrogen oxide and oxysulfide is all higher than 1 milligram/cubic metre.
Comparative example 3
The palladium of embodiment 1 is replaced with Co, and all the other conditions are constant, and PM2.5 value is 36, and the value of nitrogen oxide and oxysulfide is all higher than 1 milligram/cubic metre.
Comparative example 4
Component A content 70%, not containing B component, all the other conditions are constant, and PM2.5 value is 32, and the value of nitrogen oxide and oxysulfide is all higher than 1 milligram/cubic metre.
Comparative example 5
B component content 70%, not containing component A, all the other conditions are constant, and PM2.5 value is 31, and the value of nitrogen oxide and oxysulfide is all higher than 1 milligram/cubic metre.
Above-described embodiment and comparative example illustrate, there is specific contact between several component of catalyst that screen pack of the present invention adopts, omit or replace wherein one or more, all can not reach the certain effects of the application, prove to which create cooperative effect.
Applicant states, the present invention illustrates screen pack of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned screen pack, does not namely mean that the present invention must rely on above-mentioned detailed catalysts and could implement described screen pack.Person of ordinary skill in the field should understand, any improvement in the present invention, to equivalence replacement and the interpolation of auxiliary element, the concrete way choice etc. of each raw material of product of the present invention, all drops within protection scope of the present invention and open scope.

Claims (5)

1. a gas screen pack, described screen pack comprises frame, frame internal fixtion has at least 6 layers of network structure, and described network structure from inside to outside laminated structure has woven wire supporting layer, porous fiber layer, active carbon layer, catalyst layer, porous fiber layer and woven wire supporting layer; Described catalyst member is made up of grained catalyst, and it comprises carrier, active component and co-catalyst, it is characterized in that,
Described carrier is β zeolite, and in the skeleton structure of zeolite, Si/ (Si+Al+P) mol ratio is 0.30;
Described active component is the V doped with Ce 2o 5/ (MoO 3) x(WO 3) 1-xwith TiO 2mixture, Ce:V 2o 5/ (MoO 3) x(WO 3) 1-x: TiO 2mol ratio be 0.25:1:2, and described titanium dioxide is anatase crystal, and described active component weight content is in the catalyst 0.3%-10%, and described x is 0.1-0.5;
Described co-catalyst is silver and palladium, and silver is 2:5 with the mol ratio of palladium, and described co-catalyst weight content is in the catalyst 0.3%-6%;
Described active carbon layer comprises following composition:
A) the β type ferrosilite of 20%-60%, shown in described β type ferrosilite is composed as follows:
(x+y)M (2/n)O·xFe 2O 3·yAl 2O 3·zSiO 2·wH 2O
In formula, M represents cation, and n is the valence of cation M, x+y+z=1, z/x to be 100-220, w be more than 1 positive integer; Its SiO 2/ Al 2o 3mol ratio be 550-800;
B) GdFeO doped with Ce of 10%-30% 3with TiO 2mixture, Ce:GdFeO 3: TiO 2mol ratio be 0.25:1:2, and described titanium dioxide is anatase crystal;
C) active carbon of surplus.
2. screen pack as claimed in claim 1, it is characterized in that, described active component weight content is in the catalyst 0.5-%-8%.
3. screen pack as claimed in claim 2, it is characterized in that, described active component weight content is in the catalyst 2%-5%.
4. screen pack as claimed in claim 1, it is characterized in that, described co-catalyst weight content is in the catalyst 0.5%-5%.
5. screen pack as claimed in claim 1, it is characterized in that, the weight ratio of described active component and co-catalyst is 5:1 ~ 2:1.
CN201510779627.6A 2015-11-13 2015-11-13 Filtering mesh capable of preventing and controlling haze Pending CN105435541A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1043450A (en) * 1988-12-17 1990-07-04 中国石油化工总公司石油化工科学研究院 The method of modifying of β zeolite
CN2650849Y (en) * 2003-06-12 2004-10-27 鸿富锦精密工业（深圳）有限公司 Air filter
CN201061628Y (en) * 2007-07-09 2008-05-21 钟喜生 Nano TiO2 polarization fibre air purification net
CN102764643A (en) * 2012-07-16 2012-11-07 中国科学院生态环境研究中心 Vanadium-titanium oxide catalyst, and preparation method and application thereof
CN103252135A (en) * 2013-05-08 2013-08-21 安徽省元琛环保科技有限公司 Dedusting and denitration integrated functional filter material and preparation method thereof
CN103534210A (en) * 2011-05-17 2014-01-22 东曹株式会社 Beta-type iron silicate composition and method for reducing nitrogen oxides
US20140044636A1 (en) * 2012-08-09 2014-02-13 Exxonmobil Research And Engineering Company CATALYTIC REDUCTION OF NOx WITH HIGH ACTIVITY CATALYSTS

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1043450A (en) * 1988-12-17 1990-07-04 中国石油化工总公司石油化工科学研究院 The method of modifying of β zeolite
CN2650849Y (en) * 2003-06-12 2004-10-27 鸿富锦精密工业（深圳）有限公司 Air filter
CN201061628Y (en) * 2007-07-09 2008-05-21 钟喜生 Nano TiO2 polarization fibre air purification net
CN103534210A (en) * 2011-05-17 2014-01-22 东曹株式会社 Beta-type iron silicate composition and method for reducing nitrogen oxides
CN102764643A (en) * 2012-07-16 2012-11-07 中国科学院生态环境研究中心 Vanadium-titanium oxide catalyst, and preparation method and application thereof
US20140044636A1 (en) * 2012-08-09 2014-02-13 Exxonmobil Research And Engineering Company CATALYTIC REDUCTION OF NOx WITH HIGH ACTIVITY CATALYSTS
CN103252135A (en) * 2013-05-08 2013-08-21 安徽省元琛环保科技有限公司 Dedusting and denitration integrated functional filter material and preparation method thereof

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