CN106391131A - Preparation method of automobile exhaust catalyst - Google Patents

Preparation method of automobile exhaust catalyst Download PDF

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Publication number
CN106391131A
CN106391131A CN201610740023.5A CN201610740023A CN106391131A CN 106391131 A CN106391131 A CN 106391131A CN 201610740023 A CN201610740023 A CN 201610740023A CN 106391131 A CN106391131 A CN 106391131A
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powder
catalyst
suspension
preparation
auto
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CN106391131B (en
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谷鹏
卢利平
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Henan Polytechnic Institute
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Henan Polytechnic Institute
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    • 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
    • B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
    • B01J31/38—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of titanium, zirconium or hafnium
    • 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
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1023—Palladium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/70—Non-metallic catalysts, additives or dopants
    • B01D2255/705—Ligands for metal-organic catalysts

Abstract

The invention discloses a preparation method of an automobile exhaust catalyst. The method comprises the steps of: mixing zirconium oxide, cerium oxide, nickel powder, lanthanum powder and manganese oxide by mass fraction and conducting ball milling, then adding alumina powder and further performing ball milling, then blending the obtained composite powder with a nano titanium dioxide particle dispersion solution, and conducting heating till total evaporation of water, then mixing the obtained powder with activated carbon fiber and a chitosan/Cu2O suspension in proportion to obtain a suspension; adding the obtained suspension dropwise into a NaOH solution, placing the obtained brick red gel beads into a solution prepared from palladium chloride and the like, then taking the beads out and performing curing, separating the obtained gel beads, conducting washing to neutral, and performing drying. The catalyst obtained by the method provided by the invention has strong adsorption and degradation ability, and the added nickel, lanthanum and manganese improve the activity of the catalyst. By adding the chitosan/Cu2O suspension, nano titanium dioxide and the like, the purification performance of the catalyst is greatly increased, and the catalyst is conveniently regenerable, thus reducing the cost.

Description

The preparation method of auto-exhaust catalyst
Technical field
The present invention relates to car tail gas purificant field is and in particular to a kind of preparation method of auto-exhaust catalyst.
Background technology
With the increase of automobile pollution, CO, HC, NOX that automobile discharges in air get more and more.At present, many states Family has taken strict control emission measure to motor vehicle exhaust emission.The process of therefore vehicle exhaust is increasingly becoming important Problem.In the prior art, it is to be realized by installing catalytic cleaner additional to the control of motor vehicle exhaust emission, and catalytic cleaner Key be catalyst.Catalyst is generally made up of active component, washcoat and carrier using three-decker.From rare earth calcium Titanium ore oxide (PTO) be used for tail gas catalyzed since, produce Lacking oxygen because its A, B position can replace, such is urged simultaneously Agent has larger price advantage to noble metal catalyst so that such catalyst becomes the focus of research.But, existing single The PTO catalytic performance of component is not good, stability is poor it is impossible to meet increasingly serious motor vehicle exhaust emission pollution.
Content of the invention
For solving the above problems, the invention provides a kind of preparation method of auto-exhaust catalyst, gained is tail gas catalyzed Agent stable performance, good tail gas purification effect.
For achieving the above object, the technical scheme that the present invention takes is：
The preparation method of auto-exhaust catalyst, comprises the steps：
S1, press mass fraction by zirconium oxide, cerium oxide, nickel powder and lanthanum powder, manganese oxide mixing and ball milling, be subsequently adding aluminum oxide Powder continues ball milling, obtains composite powder；
S2, weigh 1-10 part nano titanium oxide formation inorganic nano is scattered in pure water by supersonic oscillations equipment Particle dispersion；
S3, dispersion liquid is injected high-speed mixer and gained composite powder by liquid feeding pump it is blended, be heated to water complete Portion evaporates, and obtains powder；
S4, the NACF of gained powder and 1-10 part is put into homogenization machine stirring 27-37min, with 30-50 part shell gather Sugar/Cu2O suspension mix and blend 5-30min, obtains mixing suspension；
S5, draw above-mentioned suspension be dropwise added drop-wise to 50mL, 2.0mol L with 10mL syringe-1NaOH solution in, Generate brick-red gelled pill；
S6, by the brick-red gelled pill of gained be placed in by palladium bichloride, ammoniacal liquor, EDTA, hydrazine hydrate and deionized water prepare Solution in, soak 2min after, take out, solidify 24h, obtain gel ball；
S7, gained gel ball is separated, with distilling water washing, to neutral, then at 60 DEG C, be vacuum dried 24h, must urge Agent.
Preferably, the time of described mixing and ball milling is 33-47h, and drum's speed of rotation is 180-220r/min, ratio of grinding media to material 5-7: 1.
Preferably, the time of described ball milling is 17-33h, and drum's speed of rotation is 160-200r/min, ratio of grinding media to material 5-7: 1.
Preferably, described shitosan/Cu2O suspension prepares gained by following steps：
By Cu2O nano-particle is proportionally added in the chitosan-acetic acid solution that mass fraction is 2%, and ultrasonic wave disperses 10min, obtains finely dispersed suspension.
Preferably, Cu2The mass ratio of O and chitosan-acetic acid solution that mass fraction is 2% is 3: 1-5: 1.
Preferably, in described step S4, homogenization machine rotating speed is 13-17r/min.
Preferably, in described composite powder, zirconium oxide accounts for 3-8wt%, and cerium oxide accounts for 13-21wt%, and nickel accounts for 2-4wt%, lanthanum Account for 1-3wt%, manganese oxide 2-3%, balance of aluminum oxide.
The invention has the advantages that：
Gained catalyst has very strong absorption and degradation capability, with the addition of nickel, lanthanum and manganese and the active of catalyst is obtained To improvement；By shitosan/Cu2The interpolation of O suspension, nano titanium oxide etc., considerably increases the purification of gained catalyst Performance, and regenerate conveniently, reduce cost.
Specific embodiment
In order that objects and advantages of the present invention become more apparent, with reference to embodiments the present invention is carried out further Describe in detail.It should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to limit this Bright.
Shitosan/Cu used in following examples in following examples2O suspension prepares institute by following steps ?：By Cu2O nano-particle is proportionally added in the chitosan-acetic acid solution that mass fraction is 2%, and ultrasonic wave disperses 10min, Obtain finely dispersed suspension, wherein, Cu2The mass ratio of O and chitosan-acetic acid solution that mass fraction is 2% is 3: 1-5: 1. The time of mixing and ball milling is 33-47h, and drum's speed of rotation is 180-220r/min, ratio of grinding media to material 5-7: 1；The time of ball milling is 17- 33h, drum's speed of rotation is 160-200r/min, ratio of grinding media to material 5-7: 1.
Embodiment 1
The preparation method of auto-exhaust catalyst, comprises the steps：
S1, press mass fraction by zirconium oxide, cerium oxide, nickel powder and lanthanum powder, manganese oxide mixing and ball milling, be subsequently adding aluminum oxide Powder continues ball milling, obtains composite powder；In described composite powder, zirconium oxide accounts for 3wt%, and cerium oxide accounts for 21wt%, and nickel accounts for 2wt%, Lanthanum accounts for 1wt%, manganese oxide 2%, balance of aluminum oxide；
S2, weigh 1 part of nano titanium oxide formation inorganic nano-particle is scattered in pure water by supersonic oscillations equipment Sub- dispersion liquid；
S3, dispersion liquid is injected high-speed mixer and gained composite powder by liquid feeding pump it is blended, be heated to water complete Portion evaporates, and obtains powder；
S4, the NACF of gained powder and 1 part is put into homogenization machine stirring 27-37min, homogenization machine rotating speed be 13- 17r/min, with 30 parts of shitosan/Cu2O suspension mix and blend 5-30min, obtains mixing suspension；
S5, draw above-mentioned suspension be dropwise added drop-wise to 50mL, 2.0mol L with 10mL syringe-1NaOH solution in, Generate brick-red gelled pill；
S6, by the brick-red gelled pill of gained be placed in by palladium bichloride, ammoniacal liquor, EDTA, hydrazine hydrate and deionized water prepare Solution in, soak 2min after, take out, solidify 24h, obtain gel ball；
S7, gained gel ball is separated, with distilling water washing, to neutral, then at 60 DEG C, be vacuum dried 24h, must urge Agent.
Embodiment 2
The preparation method of auto-exhaust catalyst, comprises the steps：
S1, press mass fraction by zirconium oxide, cerium oxide, nickel powder and lanthanum powder, manganese oxide mixing and ball milling, be subsequently adding aluminum oxide Powder continues ball milling, obtains composite powder；In described composite powder, zirconium oxide accounts for 8wt%, and cerium oxide accounts for 13wt%, and nickel accounts for 2wt%, Lanthanum accounts for 1wt%, manganese oxide 2%, balance of aluminum oxide；
S2, weigh 10 parts of nano titanium oxides formation inorganic nano-particle is scattered in pure water by supersonic oscillations equipment Sub- dispersion liquid；
S3, dispersion liquid is injected high-speed mixer and gained composite powder by liquid feeding pump it is blended, be heated to water complete Portion evaporates, and obtains powder；
S4, the NACF of gained powder and 10 parts is put into homogenization machine stirring 27-37min, homogenization machine rotating speed be 13- 17r/min, with 50 parts of shitosan/Cu2O suspension mix and blend 5-30min, obtains mixing suspension；
S5, draw above-mentioned suspension be dropwise added drop-wise to 50mL, 2.0mol L with 10mL syringe-1NaOH solution in, Generate brick-red gelled pill；
S6, by the brick-red gelled pill of gained be placed in by palladium bichloride, ammoniacal liquor, EDTA, hydrazine hydrate and deionized water prepare Solution in, soak 2min after, take out, solidify 24h, obtain gel ball；
S7, gained gel ball is separated, with distilling water washing, to neutral, then at 60 DEG C, be vacuum dried 24h, must urge Agent.
Embodiment 3
The preparation method of auto-exhaust catalyst, comprises the steps：
S1, press mass fraction by zirconium oxide, cerium oxide, nickel powder and lanthanum powder, manganese oxide mixing and ball milling, be subsequently adding aluminum oxide Powder continues ball milling, obtains composite powder；In described composite powder, zirconium oxide accounts for 5.5wt%, and cerium oxide accounts for 17wt%, and nickel accounts for 3wt%, lanthanum accounts for 2wt%, manganese oxide 2.5%, balance of aluminum oxide；
S2, weigh 5.5 parts of nano titanium oxides formation inorganic nano is scattered in pure water by supersonic oscillations equipment Particle dispersion；
S3, dispersion liquid is injected high-speed mixer and gained composite powder by liquid feeding pump it is blended, be heated to water complete Portion evaporates, and obtains powder；
S4, the NACF of gained powder and 5.5 parts is put into homogenization machine stirring 27-37min, homogenization machine rotating speed is 13-17r/min, with 40 parts of shitosan/Cu2O suspension mix and blend 5-30min, obtains mixing suspension；
S5, draw above-mentioned suspension be dropwise added drop-wise to 50mL, 2.0mol L with 10mL syringe-1NaOH solution in, Generate brick-red gelled pill；
S6, by the brick-red gelled pill of gained be placed in by palladium bichloride, ammoniacal liquor, EDTA, hydrazine hydrate and deionized water prepare Solution in, soak 2min after, take out, solidify 24h, obtain gel ball；
S7, gained gel ball is separated, with distilling water washing, to neutral, then at 60 DEG C, be vacuum dried 24h, must urge Agent.
The above is only the preferred embodiment of the present invention it is noted that ordinary skill people for the art For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims (7)

1. the preparation method of auto-exhaust catalyst is it is characterised in that comprise the steps：
S1, press mass fraction by zirconium oxide, cerium oxide, nickel powder and lanthanum powder, manganese oxide mixing and ball milling, be subsequently adding alumina powder and continue Continuous ball milling, obtains composite powder；
S2, weigh 1-10 part nano titanium oxide formation inorganic nano-particle is scattered in pure water by supersonic oscillations equipment Dispersion liquid；
S3, dispersion liquid is injected high-speed mixer and gained composite powder by liquid feeding pump it is blended, be heated to water and all steam Send out, obtain powder；
S4, the NACF of gained powder and 1-10 part is put into homogenization machine stirring 27-37min, with 30-50 part shitosan/ Cu2O suspension mix and blend 5-30min, obtains mixing suspension；
S5, draw above-mentioned suspension be dropwise added drop-wise to 50mL, 2.0mol L with 10mL syringe-1NaOH solution in, generate Brick-red gelled pill；
S6, by the brick-red gelled pill of gained be placed in by palladium bichloride, ammoniacal liquor, EDTA, hydrazine hydrate and deionized water prepare molten In liquid, after soaking 2min, take out, solidify 24h, obtain gel ball；
S7, gained gel ball is separated, with distilling water washing, to neutral, then at 60 DEG C, be vacuum dried 24h, obtain catalyst.
2. the preparation method of auto-exhaust catalyst as claimed in claim 1 is it is characterised in that the time of described mixing and ball milling For 33-47h, drum's speed of rotation is 180-220r/min, ratio of grinding media to material 5-7: 1.
3. auto-exhaust catalyst as claimed in claim 1 preparation method it is characterised in that the time of described ball milling be 17-33h, drum's speed of rotation is 160-200r/min, ratio of grinding media to material 5-7: 1.
4. the preparation method of auto-exhaust catalyst as claimed in claim 1 is it is characterised in that described shitosan/Cu2O is suspended Liquid prepares gained by following steps：
By Cu2O nano-particle is proportionally added in the chitosan-acetic acid solution that mass fraction is 2%, and ultrasonic wave disperses 10min, Obtain finely dispersed suspension.
5. the preparation method of auto-exhaust catalyst as claimed in claim 4 is it is characterised in that Cu2O and mass fraction are 2% Chitosan-acetic acid solution mass ratio be 3: 1-5: 1.
6. the preparation method of auto-exhaust catalyst as claimed in claim 1 is it is characterised in that homogenization machine in described step S4 Rotating speed is 13-17r/min.
7. the preparation method of auto-exhaust catalyst as claimed in claim 1 is it is characterised in that aoxidize in described composite powder Zirconium accounts for 3-8wt%, and cerium oxide accounts for 13-21wt%, and nickel accounts for 2-4wt%, and lanthanum accounts for 1-3wt%, manganese oxide 2-3%, balance of oxidation Aluminium.
CN201610740023.5A 2016-08-29 2016-08-29 The preparation method of auto-exhaust catalyst Active CN106391131B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109113837A (en) * 2018-08-31 2019-01-01 长春工程学院 A kind of catalysis treatment method of vehicle exhaust

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102974347A (en) * 2012-12-03 2013-03-20 南京大学 Method for preparing copper-based nano-catalyst with different valence states
CN104722281A (en) * 2015-03-30 2015-06-24 上海师范大学 Nano titanium dioxide/chitosan three-dimensional porous composite material and preparation method thereof
CN105688905A (en) * 2016-04-27 2016-06-22 柳州申通汽车科技有限公司 Preparation technology of automobile exhaust catalyst

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102974347A (en) * 2012-12-03 2013-03-20 南京大学 Method for preparing copper-based nano-catalyst with different valence states
CN104722281A (en) * 2015-03-30 2015-06-24 上海师范大学 Nano titanium dioxide/chitosan three-dimensional porous composite material and preparation method thereof
CN105688905A (en) * 2016-04-27 2016-06-22 柳州申通汽车科技有限公司 Preparation technology of automobile exhaust catalyst

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张继光: "《催化剂制备过程技术 第2版》", 31 August 2011 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109113837A (en) * 2018-08-31 2019-01-01 长春工程学院 A kind of catalysis treatment method of vehicle exhaust

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