CN102407132A - Highly effective cleaning catalyst for automobile tail gas and preparation method thereof - Google Patents

Highly effective cleaning catalyst for automobile tail gas and preparation method thereof Download PDF

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Publication number
CN102407132A
CN102407132A CN2011103227598A CN201110322759A CN102407132A CN 102407132 A CN102407132 A CN 102407132A CN 2011103227598 A CN2011103227598 A CN 2011103227598A CN 201110322759 A CN201110322759 A CN 201110322759A CN 102407132 A CN102407132 A CN 102407132A
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CN
China
Prior art keywords
catalyst
carrier
preparation
cuo
cleaning catalyst
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Pending
Application number
CN2011103227598A
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Chinese (zh)
Inventor
高静
袁代华
邓金智
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Chengdu Fanxinjia Technology Co Ltd
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Chengdu Fanxinjia Technology Co Ltd
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Priority to CN2011103227598A priority Critical patent/CN102407132A/en
Publication of CN102407132A publication Critical patent/CN102407132A/en
Pending legal-status Critical Current

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • Catalysts (AREA)

Abstract

The invention discloses a highly effective cleaning catalyst for automobile tail gas and preparation method thereof. The catalyst is prepared by taking Ni-Cr alloy as carrier, Ce-Zr-La as composite oxides and CuO as auxiliaries, and loading Pd. The catalyst can convert NO, CO and HC with high pollution to the atmosphere in the automobile tail gas in the absence of other substances and the conversion rate is high. It is an automobile tail gas catalyst with low toxicity and high catalytic activity.

Description

A kind of efficient cleaning catalyst that is used for vehicle exhaust and preparation method thereof
Technical field
The present invention relates to a kind of efficient cleaning catalyst that is used for vehicle exhaust and preparation method thereof, is that it is to polluter NO in the vehicle exhaust specifically X, HC and CO carry out the catalyst and the synthetic technology thereof of integrated treatment.
Background technology
Automobile has become requisite part in our daily life.Automobile has also produced many bad accessory substances bringing us simultaneously easily.Tail gas pollution is exactly one of accessory substance, also is one of main source of atmosphere pollution simultaneously.Most NO in the city X, CO, HC and CO 2All make CO by vehicle exhaust 2Cause the one of the main reasons of atmosphere pollution and greenhouse effects especially.NO X, CO, HC not only cause damage but also produce blue photochemical fog under certain conditions human body, makes vegetation dead, the environment of human survival is destroyed.
At present, the major measure of control motor vehicle exhaust emission is to develop the purification techniques of auto-exhaust catalyst efficiently.Currently use maximum auto-exhaust catalysts to be noble metal triple effect catalyst (TWC), noble metal catalyst has higher activity, and big extremely ratio is occupied in tail-gas catalyst market in the world, but itself also has a lot of shortcomings.Have only when the scope of air-fuel ratio is controlled at (14.6 ± 0.3), just can make NO X, CO and HC detergent power reach maximum, outside this scope, catalytic effect is all relatively poor.Noble metal catalyst was poisoned when elements such as Pb, S, P all were prone to, wherein Pb having the greatest impact to TWC.The price of noble metal is expensive, and the noble metal scarcity of resources also makes the application of TW C and popularization be restricted at present.
Summary of the invention
The objective of the invention is to the costing an arm and a leg of noble metal in the prior art, shortcoming such as toxicity is big provides the little activity of a kind of toxicity higher auto-exhaust catalyst.
Technical scheme of the present invention is: a kind of efficient cleaning catalyst that is used for vehicle exhaust, and this catalyst is a carrier with the Ni-Cr alloy, and Ce-Zr-La composite oxides and CuO are auxiliary agent, and load P d processes.Described component Ce-Zr-La composite oxides, CuO, Pd are 1 ~ 7:2 ~ 6:1 ~ 3 at the load capacity proportion by weight of integer catalyzer.
The preparation method who is used for the efficient cleaning catalyst of vehicle exhaust comprises the steps:
A is that the ratio of 1 ~ 7:2 ~ 6 adds the deionized water of press amount of the mixture 20% ~ 50% with Ce-Zr-La composite oxides and CuO according to mass ratio, and in the adding ball grinder, ball milling 3 ~ 6h processes slurry;
B immerses Ni-Cr alloy carrier in the slurry, takes out behind 1 ~ 5min, dries, and dries by the fire 3 ~ 6h at a certain temperature;
C is immersed in the PdCl that contains Pd1 ~ 3g/L with the carrier of oven dry 2In the ammonia solution, stir 3 ~ 6h, take out, dry, dry by the fire 3 ~ 6h at a certain temperature;
D immerses KBH with the carrier of oven dry 4In the solution, reaction 10 ~ 50min spends deionised water, at room temperature carries out chemical plating again, and reaction 10 ~ 50min is washed till neutrality with deionized water, at a certain temperature oven dry.
It is short that the present invention has overcome the conventional catalysts life-span, is prone to poison, and confirming of poor stability realized long-acting, stable high, safe.
The present invention has adopted the method for chemical plating, and it is simple that more traditional technology has an equipment, invest lowly, and chemical plating coating is even, and the hardness height resistance to wears, and is corrosion-resistant.
Description of drawings
Fig. 1 catalyst is to NO X, CO and HC conversion ratio be with temperature changing curve diagram.
The specific embodiment
Instance 1 Ce-Zr-La composite oxides, CuO and Pd/Ni-Cr alloy are synthetic:
Is the deionized water of the ratio adding of 3:5 by amount of the mixture 30% with Ce-Zr-La composite oxides and CuO according to mass ratio, adds in the ball grinder, and ball milling 5h processes slurry.The Ni-Cr carrier is immersed in the slurry, take out behind the 2min, dry, dry by the fire 4h down at 115 ℃.The carrier of oven dry is immersed in the palladium bichloride ammonia solution that contains Pd2.2g/L, stirs 4h.Take out, dry, dry by the fire 4h at a certain temperature.The carrier of oven dry is immersed KBH 4In the solution, reaction 30min spends deionised water, at room temperature carries out chemical plating again, and reaction 30min is washed till neutrality with deionized water, dries down at 115 ℃ and obtains Ce-Zr-La composite oxides, CuO and Pd/Ni-Cr alloy.
Instance 2 catalyst are investigated the catalytic activity of vehicle exhaust:
With the prepared catalyst of instance 1 to the NO in the vehicle exhaust X, CO and HC conversion ratio investigate.Test is in high temperature reaction stove, to carry out.To contain NO, CO 2, H 2Gaseous mixture feed in the high temperature reaction stove, every min heats up 10 ℃, finally rises to 500 ℃.Experimental result is seen table 1 and Fig. 1.
Table 1

Claims (3)

1. efficient cleaning catalyst that is used for vehicle exhaust is characterized in that it is is carrier with the Ni-Cr alloy, and Ce-Zr-La composite oxides and CuO are auxiliary agent, and load P d processes; Described component Ce-Zr-La composite oxides, CuO, Pd are 1 ~ 7:2 ~ 6:1 ~ 3 at the load capacity proportion by weight of integer catalyzer.
2. the preparation method who is used for the efficient cleaning catalyst of vehicle exhaust according to claim 1 is characterized in that comprising the steps:
A is that the ratio of 1 ~ 7:2 ~ 6 adds the deionized water that contains total amount 20% ~ 50% with Ce-Zr-La composite oxides and CuO according to mass ratio, adds in the ball grinder, and ball milling 3 ~ 6h processes slurry;
B immerses Ni-Cr alloy carrier in the slurry, takes out behind 1 ~ 5min, dries, and dries by the fire 3 ~ 6h at a certain temperature;
C is immersed in the PdCl that contains Pd1 ~ 3g/L with the carrier of oven dry 2In the ammonia solution, stir 3 ~ 6h, take out, dry, dry by the fire 3 ~ 6h at a certain temperature;
D immerses KBH with the carrier of oven dry 4In the solution, reaction 10 ~ 50min spends deionised water, at room temperature carries out chemical plating again, and reaction 10 ~ 50min is washed till neutrality with deionized water, at a certain temperature oven dry.
3. the preparation method who is used for the efficient cleaning catalyst of vehicle exhaust according to claim 2 is characterized in that: after the d step supported catalyst active ingredient is peeled off into powder or processed solution.
CN2011103227598A 2011-10-21 2011-10-21 Highly effective cleaning catalyst for automobile tail gas and preparation method thereof Pending CN102407132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011103227598A CN102407132A (en) 2011-10-21 2011-10-21 Highly effective cleaning catalyst for automobile tail gas and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011103227598A CN102407132A (en) 2011-10-21 2011-10-21 Highly effective cleaning catalyst for automobile tail gas and preparation method thereof

Publications (1)

Publication Number Publication Date
CN102407132A true CN102407132A (en) 2012-04-11

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Family Applications (1)

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CN2011103227598A Pending CN102407132A (en) 2011-10-21 2011-10-21 Highly effective cleaning catalyst for automobile tail gas and preparation method thereof

Country Status (1)

Country Link
CN (1) CN102407132A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105214659A (en) * 2015-10-30 2016-01-06 苏州莲池环保科技发展有限公司 A kind of preparation method of auto-exhaust catalyst of sulfur resistive
GR1009531B (en) * 2018-03-20 2019-05-23 Μονολιθος Καταλυτες & Ανακυκλωση Επε Catalysts comprising copper and noble metals for treating engine exhaust gases
US11254399B2 (en) 2018-03-08 2022-02-22 Etme: Peppas Kai Synergates E.E. Floating platform for maritime surveillance

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
郑向江: "单钯汽车尾气净化催化剂制备及废钯回收", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105214659A (en) * 2015-10-30 2016-01-06 苏州莲池环保科技发展有限公司 A kind of preparation method of auto-exhaust catalyst of sulfur resistive
US11254399B2 (en) 2018-03-08 2022-02-22 Etme: Peppas Kai Synergates E.E. Floating platform for maritime surveillance
GR1009531B (en) * 2018-03-20 2019-05-23 Μονολιθος Καταλυτες & Ανακυκλωση Επε Catalysts comprising copper and noble metals for treating engine exhaust gases
EP3569309A1 (en) * 2018-03-20 2019-11-20 MONOLITHOS Catalysts & Recycling Ltd Copper and noble metal polymetallic catalysts for engine exhaust gas treatment

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Application publication date: 20120411