CN111085107A - Method for purifying vehicle tail gas by porous asphalt pavement loaded composite modified photocatalyst - Google Patents
Method for purifying vehicle tail gas by porous asphalt pavement loaded composite modified photocatalyst Download PDFInfo
- Publication number
- CN111085107A CN111085107A CN201911169348.2A CN201911169348A CN111085107A CN 111085107 A CN111085107 A CN 111085107A CN 201911169348 A CN201911169348 A CN 201911169348A CN 111085107 A CN111085107 A CN 111085107A
- Authority
- CN
- China
- Prior art keywords
- molecular sieve
- tio
- carbon
- carbon molecular
- porous asphalt
- 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
- 239000010426 asphalt Substances 0.000 title claims abstract description 67
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 37
- 239000002131 composite material Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000002808 molecular sieve Substances 0.000 claims abstract description 43
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 43
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 43
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 35
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000000203 mixture Substances 0.000 claims abstract description 29
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 25
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 25
- 230000000694 effects Effects 0.000 claims abstract description 15
- AHADSRNLHOHMQK-UHFFFAOYSA-N methylidenecopper Chemical compound [Cu].[C] AHADSRNLHOHMQK-UHFFFAOYSA-N 0.000 claims abstract description 15
- 230000015556 catabolic process Effects 0.000 claims abstract description 14
- 238000006731 degradation reaction Methods 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 10
- 238000011068 loading method Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000001179 sorption measurement Methods 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 11
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 7
- 230000003197 catalytic effect Effects 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 230000003213 activating effect Effects 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 4
- 229930195733 hydrocarbon Natural products 0.000 claims description 4
- 150000002430 hydrocarbons Chemical class 0.000 claims description 4
- 238000003980 solgel method Methods 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000001354 calcination Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 230000001699 photocatalysis Effects 0.000 abstract description 12
- 239000003054 catalyst Substances 0.000 abstract description 4
- 239000002105 nanoparticle Substances 0.000 abstract description 3
- 239000003981 vehicle Substances 0.000 description 8
- 239000003344 environmental pollutant Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 5
- 238000007146 photocatalysis Methods 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 5
- 238000005054 agglomeration Methods 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 239000012876 carrier material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 3
- 238000004887 air purification Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 231100000956 nontoxicity Toxicity 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 241000511967 Tylophora Species 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229960001948 caffeine Drugs 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000002073 nanorod Substances 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000013032 photocatalytic reaction Methods 0.000 description 1
- 238000001782 photodegradation Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 238000000974 shear rheometry Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- -1 titanium glycol salt Chemical class 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- RYYVLZVUVIJVGH-UHFFFAOYSA-N trimethylxanthine Natural products CN1C(=O)N(C)C(=O)C2=C1N=CN2C RYYVLZVUVIJVGH-UHFFFAOYSA-N 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- 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
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
- B01D53/945—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific catalyst
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/72—Copper
-
- 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
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
- Combustion & Propulsion (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a method for purifying vehicle exhaust by a porous asphalt pavement loaded composite modified photocatalyst, belongs to the technical field of functional pavements, and solves the problem that the existing porous asphalt pavement loaded modified TiO is2Poor nano-particle dispersibility, more water damage, difficult catalyst surface enrichment of tail gas, incapability of fully utilizing visible light, low photocatalytic efficiency, poor degradation effect and the like. The invention firstly activates the carbon molecular sieve and then prepares the copper-carbon nano tubeCo-doped modified TiO2Sol, mixing the carbon molecular sieve and the sol fully, and repeatedly loading for 3 times to prepare the carbon molecular sieve/copper-carbon nanotube co-doped TiO2A composite photocatalyst; then, the composite photocatalyst replaces part of fine aggregates according to different proportions and is added into the porous asphalt mixture; and finally, testing the degradation effect of different mixing amounts of the composite photocatalyst on different components in the vehicle tail gas and the influence on the road performance of the asphalt mixture, determining the optimal mixing amount of the composite photocatalyst, and improving the vehicle tail gas degradation effect of the porous asphalt road surface.
Description
Technical Field
The invention discloses a method for purifying vehicle exhaust by a porous asphalt pavement loaded composite modified photocatalyst, and belongs to the technical field of functional pavements.
Background
In recent years, with the rapid development of national economy and the continuous improvement of highway and urban road comprehensive transportation networks, the motor vehicle market in China is in a longer development stage due to market demands. However, a large amount of harmful exhaust gas is discharged from fuel-oil vehicles during driving, and the main harmful components of the vehicle exhaust gas include hydrocarbons, nitrogen oxides, carbon monoxide, carbon dioxide and the like, which bring serious harm to the health and ecological environment of people.
In recent years, work for eliminating environmental pollutants by using semiconductor photocatalysts is very active, and particularly, research on photocatalytic degradation of organic pollutants obtains satisfactory results, so that the photocatalyst has a good application prospect. The nano semiconductor photocatalyst has large specific surface area, surface atom number, surface energy and surface tension which are increased rapidly along with the reduction of particle size, and the photocatalytic activity of the nano semiconductor photocatalyst is greatly increased by the scale effect. Among the numerous nanoscale semiconductor photocatalysts, the nano-titanium dioxide (TiO)2) The method has the advantages of mild reaction conditions, high activity under illumination, good stability, no toxicity and no secondary pollution, and is widely applied to the fields of wastewater treatment, precious metal recovery, air purification, coating surface self-cleaning and the like.
TiO2As a semiconductor material, the material can perform photocatalytic reaction with tail gas discharged by a vehicle under the action of photocatalysis to degrade the tail gas of the vehicle. However, conventional TiO2The energy band gap is wide, and the light-emitting diode can be only excited by ultraviolet light accounting for about 4% of sunlight and is difficult to be excited by visible light accounting for about 45% of sunlight to play a role in photocatalytic degradation. In addition, due to TiO2The quantum efficiency is low, the time for separating photoproduction electron holes is short, the carrier transfer efficiency is improved, the recombination of the electron holes is slowed down, and the TiO can also be improved2The photocatalytic efficiency of (c). In addition to this, TiO2The adsorption capacity is poor, so a new preparation method or a new loading mode is utilized to increase pollutants and TiO2Is still in contact withFurther study was required.
To improve TiO2The catalytic performance of the catalyst can be generally used for preparing nano structures with different morphologies through microstructure and defect engineering. By the introduction of a catalyst in TiO2The black TiO with the core-shell structure is prepared by introducing defects to cause lattice disorder2The electrochemical property of the material is adjusted by doping fluorine and regulating defect distribution, so that the black TiO is realized while a simple, high-efficiency and low-cost preparation method is sought2Can be effectively applied to energy sources and environment. The preparation of transition metal doped high crystallinity porous TiO by solvothermal doping2And the titanium glycol salt is found to be directly converted into porous TiO with super large specific surface area under the ultraviolet radiation2The material has excellent photogenerated electron storage capacity, and the accessibility of the porous structure can ensure that electrons are fully contacted with guest substances, so that the porous TiO is prepared on the basis2Microspheres and TiO2And (4) nanorods. TiO 22The nanotube array has the advantages of large specific surface area, strong adsorption property and high charge transmission efficiency as a novel light-transmitting structure, and photogenerated electron holes are difficult to quickly recombine, so that the structure is more novel than that of common TiO2Has better photocatalysis performance.
Due to the nanometer TiO2Has very small particle size, is easy to generate agglomeration, has small contact area and the like, and is applied to TiO at present2The modified asphalt is not studied deeply. Student to TiO2Modified TiO in asphalt2Dispersion stability, basic Properties and TiO2Research on the influence rule of the aging performance of the asphalt shows that the TiO can be effectively improved by adding a certain amount of dispersant2Amount of precipitate and degree of agglomeration, depending on the TiO2The penetration is reduced with increasing mass fraction, but the effect is not great because of the TiO2The increase of the asphalt reduces the content of effective asphalt in unit volume, the low-temperature deformation resistance of the asphalt is reduced, the softening point is basically not influenced within a certain range of mixing amount, and the anti-aging performance is improved. Also, someone has passed the dynamic shear rheology test, rotational viscosity test and bending beam rheology test to obtain 5% TiO2The degradation efficiency of the asphalt on NO under the mixing amount reaches 23.9 percent, and the PG classification of the asphalt can not be influenced, and the rheological property of the asphalt can not be obviously influenced.
However, TiO 22The application of the photocatalyst material to porous asphalt pavement has some problems to be solved. First, nano TiO2The surface area is large, the surface energy is high, the system is a thermodynamically unstable system, and the existence of Van der Waals force and Coulomb force promotes the surface particles to depend on each other to form hard agglomeration and soft agglomeration, so that the nano TiO is caused2The dispersion in the asphalt mixture is poor, so that the nano TiO2The due functions and physical properties are lost, and the catalytic effect is poor when pollutants are degraded; secondly, due to TiO2The photocatalyst has poor adsorption to pollutants, and the pollutants are difficult to be enriched on the surface of the catalyst, so that pollutant molecules and TiO are generated2Molecular collision is reduced, the photocatalytic effect is not fully exerted, and the photodegradation efficiency is low; finally, the asphalt shows oleophylic hydrophobicity and is combined with inorganic TiO2By conflict of hydrophilicity and lipophobicity, e.g. by direct enhancement of TiO2The loading capacity can affect the pavement performance of the asphalt mixture. Therefore, how to increase the TiO load of asphalt pavement is considered2It is particularly important that the photocatalytic performance does not seriously affect the pavement performance of the asphalt mixture.
To solve the above problems, researchers have recently introduced TiO2The photocatalyst is loaded on a plurality of carriers, which is an effective way for solving the problem that the photocatalyst is easy to lose and improving the pollutant adsorption capacity of the photocatalyst. TiO 22The composite carrier material is used for improving TiO in recent years2The method mainly utilizes the advantages of strong adsorbability, large specific surface area, no toxicity, strong corrosion resistance and the like of carrier materials, and takes bentonite, tylophora soil, novel carbon materials and the like as the carrier materials to form a composite system. Common loading methods include a powder sintering method, a sol-gel method, a deposition method, a sputtering method, a hydrothermal method and the like, and the adsorption type composite photocatalyst is prepared and can effectively solve the problem of nanometer TiO2The load capacity in the asphalt pavement is small and the photocatalysis efficiency is low.
Therefore, the invention makes full use ofThe porous asphalt pavement has the advantage of more contact area with vehicle exhaust, and the nano modified TiO in the porous asphalt pavement is improved by taking the alkaline porous activated carbon molecular sieve as a carrier based on developed pores and strong adsorbability of the carrier2The addition amount of the inorganic nano TiO is reduced2The negative influence on the road performance of the porous asphalt pavement can be avoided, and the direct addition of TiO can be avoided2The dispersion is not uniform, so that the photocatalysis efficiency is low, and the nano TiO is fully utilized2The photocatalytic performance of the porous asphalt pavement degrading agent can degrade the contents of hydrocarbon, oxynitride, carbon monoxide and carbon dioxide in tail gas, and has important practical significance for improving the quality of air purification based on the porous asphalt pavement.
Disclosure of Invention
(1) Technical problem
The invention relates to a method for purifying vehicle tail gas by a porous asphalt pavement loaded composite modified photocatalyst, which solves the problem that the existing porous asphalt pavement loaded modified TiO is2The dispersibility of the nano particles is poor, the water stability of the porous asphalt pavement is poor, and tail gas is difficult to modify TiO2The surface of the nano particles is enriched, visible light cannot be fully utilized, the photocatalysis efficiency is low, the degradation effect is poor and the like.
(2) Technical scheme
In view of the problems existing in the aspect of purifying the vehicle exhaust by the composite modified photocatalyst loaded on the porous asphalt pavement, the invention utilizes the characteristic of strong adsorbability of the porous activated carbon molecular sieve and adopts the carbon molecular sieve to load the nano TiO2The additive is added into porous asphalt mixture, so that the catalytic degradation efficiency is improved, and the influence on road performance is reduced. The technical scheme of the invention is as follows: firstly, activating a porous carbon molecular sieve with the size of 1-2 mm, fully roasting organic impurities and water in the molecular sieve, removing adsorbed impurities and widening the size of a pore channel; preparing copper-carbon nano tube co-doped modified TiO by adopting a sol-gel method2Collosol, under the condition of ultrasonic oscillation making carbon molecular sieve and copper-carbon nano tube co-doped with TiO2Fully mixing the sol, repeatedly loading for 3 times to prepare the carbon molecular sieve/copper-carbon nano tube co-doped TiO2A composite photocatalyst; then theIn the process of designing and preparing the mix proportion of the porous asphalt mixture, the loaded copper-carbon nano tube is codoped with TiO2The carbon molecular sieve particles substitute part of 1.18 mm-grade fine aggregates according to different proportions and are added into the porous asphalt mixture to respectively prepare porous asphalt mixture test pieces; finally, testing the carbon molecular sieve/copper-carbon nanotube co-doped TiO2The degradation effects of different mixing amounts of the composite photocatalyst on different components in the vehicle exhaust are analyzed, the influence on the pavement performance of the porous asphalt mixture is analyzed, and the carbon molecular sieve/copper-carbon nanotube co-doped TiO in the porous asphalt mixture is determined2And preparing the catalytic degradation type porous asphalt mixture by the optimal mixing amount of the composite photocatalyst.
(3) Advantageous effects
Because the porosity of the common dense-graded asphalt pavement is small, even if the photocatalyst is loaded in the asphalt pavement, only the surface layer of the pavement can play a role in degrading vehicle exhaust, and the color of the asphalt is black, so that the asphalt has a strong absorption effect and weak light transmittance on light, the light intensity reaching the photocatalytic material in the asphalt mixture is greatly weakened, and the photocatalyst in the asphalt mixture cannot fully contact with reaction substances and illumination. In addition, since inorganic TiO2Shows hydrophilic and oleophobic properties, and is directly added with nano TiO in excessive doping amount2But also can seriously affect the pavement performance of the asphalt pavement. The invention provides a method for preparing a porous activated carbon molecular sieve based on the characteristic of strong adsorbability, which comprises the steps of firstly adopting a sol-gel-impregnation method to load copper-carbon nano tube co-doped nano TiO2Preparing carbon molecular sieve/copper-carbon nano tube co-doped TiO2The composite photocatalyst is used for replacing partial fine aggregate for porous asphalt pavement, and the oleophylic hydrophobicity of the composite photocatalyst is the same as that of asphalt, so that the nano TiO is favorably improved2The dispersion ability in asphalt pavement, developed carbon molecular sieve pore and high adsorption performance, so that the carbon molecular sieve and the nano TiO can pass through the dispersion ability and the adsorption performance2The synergistic effect of adsorption and degradation improves the photocatalytic degradation efficiency and the degradation effect of the photocatalyst loaded on the porous asphalt pavement on the vehicle tail gas, and simultaneously can reduce the road performance influence on the porous asphalt pavement and improve the durability of the porous asphalt pavement.
Detailed Description
The invention relates to a method for purifying vehicle tail gas by a porous asphalt pavement loaded composite modified photocatalyst, which comprises the following specific implementation steps:
(1) activating a porous carbon molecular sieve with the particle size of 1-2 mm, firstly performing heat treatment in a drying oven at 100 ℃ for 2 hours, and then activating in a resistance furnace at 400 ℃ for 2 hours, so that organic impurities and water in pores of the carbon molecular sieve are fully roasted, adsorbed impurities are removed, and the pore size is widened;
(2) preparation of copper-carbon nanotube co-doped modified TiO by sol-gel method2Collosol, weighing a certain amount of completely activated carbon molecular sieve under the condition of ultrasonic oscillation, adding the completely activated carbon molecular sieve into the copper-carbon nano tube co-doped TiO2In the sol, the carbon molecular sieve is completely immersed in the sol, and the sol is oscillated and dispersed for 30min to ensure that the carbon molecular sieve and the copper-carbon nano tube are codoped with TiO2Fully mixing the sol;
(3) placing into a vacuum dryer, soaking for 2h under vacuum negative pressure condition to ensure that no bubbles are generated on the surface of the carbon molecular sieve, standing for 12h, filtering out solution and partial impurities, and drying the carbon molecular sieve in a blast drying oven at 100 ℃ for 3 h;
(4) loading repeatedly for 3 times according to the method of the steps (1) to (3), and calcining in a resistance furnace at 500 ℃ for 2h to prepare the carbon molecular sieve/copper-carbon nanotube co-doped TiO2The composite photocatalyst respectively represents the adsorption effect of the carbon molecular sieve and the copper-carbon nanotube co-doped TiO by utilizing an environmental scanning electron microscope and a specific surface adsorption instrument2The load capacity;
(5) in the process of designing and preparing the mix proportion of the porous asphalt mixture, the loaded copper-carbon nano tube is codoped with TiO2The carbon molecular sieve particles replace part of 1.18 mm-grade fine aggregates according to the proportion of 0%, 30%, 60% and 90% and are added into the porous asphalt mixture to respectively prepare a porous asphalt mixture track plate, a small beam and a Marshall test piece;
(6) testing carbon molecular sieve/copper-carbon nano tube co-doped TiO2The composite photocatalyst has degradation effects on hydrocarbons, nitrogen oxides, carbon monoxide and carbon dioxide in vehicle exhaust under different mixing amounts, and porous asphalt mixture paths are analyzedDetermining carbon molecular sieve/copper-carbon nanotube co-doped TiO in porous asphalt mixture by using influence of performance2And preparing the catalytic degradation type porous asphalt mixture by the optimal mixing amount of the composite photocatalyst.
Claims (1)
1. A method for purifying vehicle tail gas by a porous asphalt pavement loaded with a composite modified photocatalyst is characterized by comprising the following specific steps:
(1) activating a porous carbon molecular sieve with the particle size of 1-2 mm, firstly performing heat treatment in a drying oven at 100 ℃ for 2 hours, and then activating in a resistance furnace at 400 ℃ for 2 hours, so that organic impurities and water in pores of the carbon molecular sieve are fully roasted, adsorbed impurities are removed, and the pore size is widened;
(2) preparation of copper-carbon nanotube co-doped modified TiO by sol-gel method2Collosol, weighing a certain amount of completely activated carbon molecular sieve under the condition of ultrasonic oscillation, adding the completely activated carbon molecular sieve into the copper-carbon nano tube co-doped TiO2In the sol, the carbon molecular sieve is completely immersed in the sol, and the sol is oscillated and dispersed for 30min to ensure that the carbon molecular sieve and the copper-carbon nano tube are codoped with TiO2Fully mixing the sol;
(3) placing into a vacuum dryer, soaking for 2h under vacuum negative pressure condition to ensure that no bubbles are generated on the surface of the carbon molecular sieve, standing for 12h, filtering out solution and partial impurities, and drying the carbon molecular sieve in a blast drying oven at 100 ℃ for 3 h;
(4) loading repeatedly for 3 times according to the method of the steps (1) to (3), and calcining in a resistance furnace at 500 ℃ for 2h to prepare the carbon molecular sieve/copper-carbon nanotube co-doped TiO2The composite photocatalyst respectively represents the adsorption effect of the carbon molecular sieve and the copper-carbon nanotube co-doped TiO by utilizing an environmental scanning electron microscope and a specific surface adsorption instrument2The load capacity;
(5) in the process of designing and preparing the mix proportion of the porous asphalt mixture, the loaded copper-carbon nano tube is codoped with TiO2The carbon molecular sieve particles replace part of 1.18 mm-grade fine aggregates according to the proportion of 0%, 30%, 60% and 90% and are added into the porous asphalt mixture to respectively prepare a porous asphalt mixture track plate, a small beam and a Marshall test piece;
(6) testing carbon molecular sieve/copper-carbon nano tube co-doped TiO2The composite photocatalyst has degradation effects on hydrocarbons, nitrogen oxides, carbon monoxide and carbon dioxide in vehicle exhaust under different doping amounts, the influence on the road performance of the porous asphalt mixture is analyzed, and the carbon molecular sieve/copper-carbon nanotube co-doped TiO in the porous asphalt mixture is determined2And preparing the catalytic degradation type porous asphalt mixture by the optimal mixing amount of the composite photocatalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911169348.2A CN111085107A (en) | 2019-11-25 | 2019-11-25 | Method for purifying vehicle tail gas by porous asphalt pavement loaded composite modified photocatalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911169348.2A CN111085107A (en) | 2019-11-25 | 2019-11-25 | Method for purifying vehicle tail gas by porous asphalt pavement loaded composite modified photocatalyst |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111085107A true CN111085107A (en) | 2020-05-01 |
Family
ID=70393853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911169348.2A Pending CN111085107A (en) | 2019-11-25 | 2019-11-25 | Method for purifying vehicle tail gas by porous asphalt pavement loaded composite modified photocatalyst |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111085107A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113072815A (en) * | 2021-03-18 | 2021-07-06 | 山西黄河前沿新材料研究院有限公司 | Warm-mixed modified asphalt cover material capable of adsorbing and degrading tail gas and preparation method thereof |
| US11370707B1 (en) | 2021-03-23 | 2022-06-28 | Tongji University | Asphalt modified with red mud for porous pavement material and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005063393A1 (en) * | 2003-12-26 | 2005-07-14 | Kansai Technology Licensing Organization Co., Ltd. | Method for electrolyzing water using organic photocatalyst |
| WO2007005038A1 (en) * | 2004-08-31 | 2007-01-11 | University Of Florida Research Foundation, Inc. | Photocatalytic nanocomposites and applications thereof |
| CN101905154A (en) * | 2010-08-20 | 2010-12-08 | 中国林业科学研究院林产化学工业研究所 | Method for improving efficiency of visible light response doping-type M-TiO2/AC photocatalyst |
| CN102101051A (en) * | 2011-01-25 | 2011-06-22 | 浙江大学 | Method for preparing carbon nano tube supported nano photocatalysis material capable of degrading nitrogen oxides |
| CN110436829A (en) * | 2019-08-21 | 2019-11-12 | 南京林业大学 | The preparation method of catalytic degradation type Open grade friction course asphalt |
-
2019
- 2019-11-25 CN CN201911169348.2A patent/CN111085107A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005063393A1 (en) * | 2003-12-26 | 2005-07-14 | Kansai Technology Licensing Organization Co., Ltd. | Method for electrolyzing water using organic photocatalyst |
| WO2007005038A1 (en) * | 2004-08-31 | 2007-01-11 | University Of Florida Research Foundation, Inc. | Photocatalytic nanocomposites and applications thereof |
| CN101905154A (en) * | 2010-08-20 | 2010-12-08 | 中国林业科学研究院林产化学工业研究所 | Method for improving efficiency of visible light response doping-type M-TiO2/AC photocatalyst |
| CN102101051A (en) * | 2011-01-25 | 2011-06-22 | 浙江大学 | Method for preparing carbon nano tube supported nano photocatalysis material capable of degrading nitrogen oxides |
| CN110436829A (en) * | 2019-08-21 | 2019-11-12 | 南京林业大学 | The preparation method of catalytic degradation type Open grade friction course asphalt |
Non-Patent Citations (1)
| Title |
|---|
| 王际平: "《中国纺织品整理及进展 第2卷》", 31 May 2015, 中国轻工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113072815A (en) * | 2021-03-18 | 2021-07-06 | 山西黄河前沿新材料研究院有限公司 | Warm-mixed modified asphalt cover material capable of adsorbing and degrading tail gas and preparation method thereof |
| US11370707B1 (en) | 2021-03-23 | 2022-06-28 | Tongji University | Asphalt modified with red mud for porous pavement material and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105126924B (en) | A kind of light asphalt mixture preparation method with photocatalytic degradation function | |
| CN107174919A (en) | The composite mesopore carbosphere air purifying preparation that graphene is modified | |
| CN105170083A (en) | Method for improving degrading effect of asphalt road for automobile exhaust by utilizing activated carbon adsorbability | |
| CN107185493A (en) | The composite mesopore carbosphere air purifying preparation preparation method that graphene is modified | |
| CN103102700A (en) | Emulsified bitumen for degradation of automobile exhaust and preparation method thereof | |
| CN111085107A (en) | Method for purifying vehicle tail gas by porous asphalt pavement loaded composite modified photocatalyst | |
| CN110872447B (en) | High-viscosity asphalt material for purifying automobile exhaust and preparation method thereof | |
| Hu et al. | Developed photocatalytic asphalt mixture of open graded friction course for degrading vehicle exhaust | |
| CN109056448A (en) | It is a kind of for absorbing the town road and its construction method of vehicle exhaust | |
| CN110436829A (en) | The preparation method of catalytic degradation type Open grade friction course asphalt | |
| Lu et al. | Defected mesoporous carbon nitride with quantum confinement effect for NO purification | |
| CN117463357A (en) | CeO (CeO) 2 Composite photo-thermal catalyst of @ CoMn-LDHs, preparation method and application thereof | |
| CN112824457B (en) | High-viscosity asphalt modifier, high-viscosity asphalt material and preparation method thereof | |
| CN110283503A (en) | A kind of highway barrier coating and preparation method thereof of effective purification vehicle exhaust | |
| Dong et al. | Solar-driven photocatalytic removal of NO over a concrete paving eco-block containing black TiO 2 | |
| CN101934226A (en) | Inorganic composite material of catalytic degradation surface active agent waste water and preparation method thereof | |
| CN102078751B (en) | Bituminous pavement penetrating agent with function of purifying NOx discharged from vehicles | |
| CN110872445B (en) | Asphalt modifier for purifying automobile exhaust, asphalt material and preparation method thereof | |
| CN112745689B (en) | High-viscosity asphalt material for purifying automobile exhaust and preparation method thereof | |
| CN113045247B (en) | Light asphalt mixture capable of being degraded by photocatalysis and preparation method thereof | |
| CN109748546A (en) | Has the slurry mixture and preparation method thereof of environment-friendly function | |
| CN110872444B (en) | Emulsified asphalt material for purifying automobile exhaust and preparation method thereof | |
| CN116904088B (en) | Tail gas purification type coating based on visible light catalyst and preparation method thereof | |
| CN110256893A (en) | It can assist the guardrail coating additive and preparation method thereof of purification vehicle exhaust | |
| CN116904088A (en) | Tail gas purification type coating based on visible light catalyst and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200501 |
|
| WD01 | Invention patent application deemed withdrawn after publication |