CN109012159A - Method based on asphalt mastic stone pavements catalytic degradation vehicle exhaust - Google Patents

Method based on asphalt mastic stone pavements catalytic degradation vehicle exhaust Download PDF

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Publication number
CN109012159A
CN109012159A CN201810969986.1A CN201810969986A CN109012159A CN 109012159 A CN109012159 A CN 109012159A CN 201810969986 A CN201810969986 A CN 201810969986A CN 109012159 A CN109012159 A CN 109012159A
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China
Prior art keywords
copper
sma
lanthanum
catalytic degradation
stabilizer
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CN201810969986.1A
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Chinese (zh)
Inventor
田清
许涛
郭涛
马翔
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Nanjing Forestry University
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Nanjing Forestry University
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Priority to CN201810969986.1A priority Critical patent/CN109012159A/en
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    • 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
    • B01D53/8643—Removing mixtures of carbon monoxide or hydrocarbons and nitrogen oxides
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00—Coherent pavings made in situ
    • E01C7/08—Coherent pavings made in situ made of road-metal and binders
    • E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
    • E01C7/26—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre
    • E01C7/262—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre with fibrous material, e.g. asbestos; with animal or vegetal admixtures, e.g. leather, cork
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20707—Titanium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/702—Hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/01—Engine exhaust gases
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Catalysts (AREA)

Abstract

The present invention is a kind of method for being based on the road surface asphalt-mastic-broken stone (SMA) catalytic degradation vehicle exhaust, belongs to SMA pavement technique field, solves the current road surface SMA without catalytic degradation vehicle exhaust function, nano-TiO2The problem that dispersibility is poor, catalytic degradation effect is poor.The present invention is using lanthanum and copper ion as the modified TiO of dopant2, lignin stabilizer prepares the codoping modified TiO of lanthanum-carried-copper as adsorbent, using sol-gel method2Lignin stabilizer, mix SMA mixture in；Then, pavement performance and the catalytic degradation effect to tail gas main component are evaluated；The pavement performance and catalytic degradation test result of SMA mixture is comprehensively compared, adjusts lanthanum nitrate and copper-bath concentration, by testing repeatedly, determination is supported on TiO on lignin stabilizer2Lanthanum and copper optimum doping amount, for making have catalytic degradation vehicle exhaust function the road surface SMA.The present invention can be used in the practice of the road surface SMA, be of great significance to reducing atmosphere pollution, improving quality of air environment.

Description

Method based on asphalt mastic stone pavements catalytic degradation vehicle exhaust
Technical field
The present invention is a kind of method for being based on the road surface asphalt-mastic-broken stone (SMA) catalytic degradation vehicle exhaust, belongs to SMA Pavement technique field.
Background technique
With science and technology and economic continuous development, the motorization level in China is higher and higher, this brings for our life Convenience, but the problems such as bring is traffic pollution therewith, it is maximum that China continuous 8 years becomes Global Trends in Motor Vehicle volume of production and marketing Country, motor-vehicle tail-gas has become the main source of China's atmosphere pollution and the important original of particulate matter and photochemical pollution Cause.The tail gas of vehicular emission has become the main source of urban air pollution, affects the health of people.Long Term Contact Vehicle exhaust can directly stimulate human respiratory tract, lead to the immunity degradation of respiratory system, the carbon monoxide of low concentration in tail gas Carbon monoxide haemoglobin can be formed in conjunction with the ferroheme of human body, once more than 10% adverse effect will be generated to people.Research It the result shows that not only prestige does harm to human health to vehicle exhaust, but also will affect ecological environment, lead to city greenhouse effects, acid rain With city photochemical fog.
Vehicle exhaust problem is more serious, therefore in order to solve the problems, such as vehicle exhaust, road work researchers consider from Carrier-pavement material of automobile is started with, and a kind of functional ground surface material of novel biodegradable vehicle tail gas is developed.It is domestic at present Have some about road load TiO2The research of degrading tail gas catalyst, the principal mode of China's road be cement pavement and Bituminous pavement, the country have numerous studies for TiO2It is carried in cement pavement and bituminous pavement, has been laid with test section, as a result table It is bright to have loaded TiO2Ground surface material to automobile exhaust degrading have preferable effect.Although photocatalytically TiO2It can be with Catalytic degradation tail gas, but its absorption spectrum is shorter, degradation catalytic efficiency is lower, and is mixed in pitch, easily by asphalt membrane Covering, photocatalysis performance are unobvious.
The road surface SMA refers to that the bitumastic being made of pitch, miberal powder, fiber stabilizer and fine aggregate is filled in interruption grade The road surface of closely knit asphalt institute making is formed in skeleton gap with coarse aggregate.The road surface SMA is middle 1960s Germany is a kind of novel pavement for solving the problems, such as track and growing up on the basis of cast asphalt concrete.Stabilizer has wood Quality fiber, mineral fibres, polymer fiber etc..Since the road surface SMA has good high-temperature stability, low-temperature stability and makes With the service life it is long the advantages that, be widely used in newly-built the upper surface of highway and Urban Road Asphalt Pavement layer in China.The road surface SMA In be used as the lignocellulosic of stabilizer and can load TiO by modification2, assign the function of the road surface SMA catalytic degradation vehicle exhaust.
Therefore, the present invention is using lanthanum, copper to TiO2It is doped study on the modification, by between rare earth element and metallic element Different modification mechanisms plays the two synergistic effect, improves TiO2Photocatalysis efficiency, the characteristics of according to the road surface SMA, selection wood The loaded modified TiO of quality stabilizer2, composite photo-catalyst is prepared, then mixes lignin stabilizer in SMA mixture, point SMA is analysed to the catalytic degradation performance of tail gas, and analyze lignin stabilizer to influence SMA mixture pavement performance, comprehensively considered The codoping modified TiO of lanthanum-carried-copper2Influence of the lignin stabilizer to SMA degrading tail gas and pavement performance, determination most preferably mixes Amount is used for the road surface SMA.
Summary of the invention
(1) technical problem
It is an object of the present invention to provide a kind of methods based on the road surface SMA catalytic degradation vehicle exhaust, solve the current road surface SMA Without catalytic degradation vehicle exhaust function, nano-TiO2The problem that dispersibility is poor, catalytic degradation effect is poor assigns the road surface SMA drop The function of vehicle exhaust is solved, air quality is improved.
(2) technical solution
In view of the current road surface SMA in the presence of no catalytic degradation vehicle exhaust function, nano-TiO2Dispersed poor, catalytic degradation The problem of effect difference, the present invention prepare the codoping modified TiO of lanthanum-carried-copper2Lignin stabilizer for mentioning in the road surface SMA For a kind of method based on the road surface SMA catalytic degradation vehicle exhaust.Technical solution of the present invention is as follows: selection lanthanum, copper conduct first Modified ion, lignocellulosic make adsorbent, prepare a kind of codoping modified TiO of lanthanum-carried-copper using sol-gel method2's Then composite photo-catalyst is mixed in the road surface SMA, evaluating influences the pavement performance of SMA mixture, utilizes photochemical catalyst Degradation vehicle exhaust test device, simulated solar optical tests asphalt imitate the photocatalytic degradation of each ingredient of vehicle exhaust Fruit finally comprehensively considers the codoping modified TiO of lanthanum-carried-copper2Lignin stabilizer to SMA degrading tail gas and pavement performance It influences, determines TiO2Middle lanthanum, copper optimum doping amount have the road surface SMA of catalytic degradation vehicle exhaust for making.
(3) beneficial effect
The tail gas of vehicular emission has become the main source of urban air pollution, affects the health of people.It is long Phase contact vehicle exhaust can directly stimulate human respiratory tract, lead to the immunity degradation of respiratory system, the one of low concentration in tail gas Carbonoxide can form Carbon monoxide haemoglobin in conjunction with the ferroheme of human body, once more than 10% bad shadow will be generated to people It rings.Result of study shows vehicle exhaust not only prestige evil human health, but also will affect ecological environment, and city greenhouse is caused to be imitated It answers, acid rain and city photochemical fog.Vehicle exhaust endangers health and environment, it is therefore desirable to solve this problem.This hair Bright method of the offer based on the road surface SMA catalytic degradation vehicle exhaust, is used to prepare the codoping modified TiO of lanthanum-carried-copper2It is compound Photochemical catalyst is mixed in the road surface SMA, is comprehensively considered its performance and degradation vehicle exhaust efficiency, is determined the optimum mix amount, be used for Engineering practice, to degradation vehicle exhaust, improve atmospheric environment, reduce environmental pollution it is significant.
Specific embodiment
The present invention is a kind of method based on the road surface SMA catalytic degradation vehicle exhaust, and specific implementation step is as follows:
(1) lanthanum nitrate hexahydrate of the 0.2mol/L of 15ml is prepared as lanthanum source, the copper-bath of the 0.04mol/L of 15ml As copper source, lignin stabilizer is cleaned with deionized water, removes impurity, dry 1h at 100 DEG C；
(2) 30ml dehydrated alcohol, 20ml butyl titanate, obtained solution A, in another beaker are sequentially added in beaker In sequentially add 20ml dehydrated alcohol, 18ml glacial acetic acid, 15ml lanthanum nitrate hexahydrate, 15ml copper-bath, hydrochloric acid is instilled, by pH Value is adjusted to 1~2, obtained solution B；
(3) solution B is instilled in solution A with the rate of 1~2 drop per second, is uniformly mixed, colloidal sol is made, it will be a certain amount of Lignin stabilizer is added in colloidal sol, stirs 1h, stands for 24 hours, filters off extra colloidal sol with Suction filtration device, the dry 2h at 100 DEG C, 200 DEG C of Muffle furnace calcining 2h are put into, the codoping modified TiO of lanthanum-carried-copper is made2Lignin stabilizer；
(4) by the codoping modified TiO of lanthanum-carried-copper of preparation2Lignin stabilizer be added to SMA according to a certain percentage In mixture, stablized using wheel tracking test, indirect tensile test on frozen-thaw, the high-temperature stability of low temperature bend test evaluation mixture, water The pavement performance of property, low-temperature cracking-resistance；
(5) using the automotive exhaust catalysis degradation test macro of independent research, the codoping modified TiO of lanthanum-carried-copper is evaluated2 Lignin stabilizer four kinds of tail hydrocarbon in gas, oxynitrides, carbon monoxide, carbon dioxide main components are urged Change degradation effect；
(6) pavement performance and catalytic degradation test result of SMA mixture is comprehensively compared, adjusts lanthanum nitrate and copper sulphate is molten Liquid concentration determines TiO by testing repeatedly2Middle lanthanum and copper optimum doping amount and the codoping modified TiO of lanthanum-carried-copper2Wood Quality stabilizer additive amount has the road surface SMA of catalytic degradation vehicle exhaust for making.

Claims (1)

1. a kind of method based on the road surface SMA catalytic degradation vehicle exhaust, it is characterised in that specific step is as follows for this method:
(1) lanthanum nitrate hexahydrate of the 0.2mol/L of 15ml is prepared as lanthanum source, the copper-bath conduct of the 0.04mol/L of 15ml Copper source cleans lignin stabilizer with deionized water, removes impurity, dries 1h at 100 DEG C；
(2) sequentially add 30ml dehydrated alcohol, 20ml butyl titanate in beaker, obtained solution A, in another beaker according to Secondary addition 20ml dehydrated alcohol, 18ml glacial acetic acid, 15ml lanthanum nitrate hexahydrate, 15ml copper-bath instill hydrochloric acid, by pH value tune To 1~2, obtained solution B；
(3) solution B is instilled in solution A with the rate of 1~2 drop per second, is uniformly mixed, colloidal sol is made, it will be a certain amount of wooden Plain stabilizer is added in colloidal sol, stirs 1h, stands for 24 hours, filters off extra colloidal sol with Suction filtration device, and dry 2h, is put at 100 DEG C 200 DEG C of Muffle furnaces calcine 2h, and the codoping modified TiO of lanthanum-carried-copper is made2Lignin stabilizer；
(4) by the codoping modified TiO of lanthanum-carried-copper of preparation2Lignin stabilizer be added to according to a certain percentage SMA mixing In material, using wheel tracking test, indirect tensile test on frozen-thaw, the low temperature bend test evaluation high-temperature stability of mixture, water stability, low The pavement performance of warm crack resistance；
(5) using the automotive exhaust catalysis degradation test macro of independent research, the codoping modified TiO of lanthanum-carried-copper is evaluated2Wood The catalysis of four kinds of tail hydrocarbon in gas, oxynitrides, carbon monoxide, carbon dioxide main components drops in quality stabilizer Solve effect；
(6) pavement performance and catalytic degradation test result of SMA mixture is comprehensively compared, adjusts lanthanum nitrate and copper-bath is dense Degree, by testing repeatedly, determines TiO2Middle lanthanum and copper optimum doping amount and the codoping modified TiO of lanthanum-carried-copper2Lignin Stabilizer additive amount has the road surface SMA of catalytic degradation vehicle exhaust for making.
CN201810969986.1A 2018-08-21 2018-08-21 Method based on asphalt mastic stone pavements catalytic degradation vehicle exhaust Pending CN109012159A (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN111686765A (en) * 2020-05-22 2020-09-22 西安交通大学 Preparation of CuSO4/TiO2Method for preparing sulfur-resistant denitration catalyst

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Application publication date: 20181218