CN107552048A - It is a kind of to be used to eliminate catalyst of volatile organic matter and preparation method thereof - Google Patents
It is a kind of to be used to eliminate catalyst of volatile organic matter and preparation method thereof Download PDFInfo
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- CN107552048A CN107552048A CN201710969219.6A CN201710969219A CN107552048A CN 107552048 A CN107552048 A CN 107552048A CN 201710969219 A CN201710969219 A CN 201710969219A CN 107552048 A CN107552048 A CN 107552048A
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- 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
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- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
A kind of to be used to eliminate catalyst of volatile organic matter and preparation method thereof, catalyst is made up of cordierite honeycomb ceramic carrier, three coatings, and first coating includes Nb2O5、Y2O3、In2O3And ZnO, the content of first coating are calculated as 40g/L, Nb with the coating quality after 400 DEG C of roastings 4 hours2O5、Y2O3、In2O3Mass ratio with ZnO is 30:45:5:20；Second coating includes SnO2、In2O3And Rh, the content of second coating are calculated as 5~20g/L, SnO with the coating quality after 400 DEG C of roastings 4 hours2、In2O3Mass ratio with Rh is 92:7:1；3rd coating includes Pt, and the coating quality after content is calcined 4 hours with 500 DEG C is calculated as 0.1~0.5g/L.Catalyst is made using coating three times.Catalyst has catalytic activity high, and heat endurance is high, can effectively eliminate volatile organic matter.
Description
Technical field
The present invention relates to a kind of catalyst for being used to eliminate volatile organic matter and preparation method thereof, belong to atmospheric environment guarantor
The environmental catalysis Material Field of shield.
Background technology
The production process of the industries such as coating, tin graphed sheet, printing, pharmacy, petrochemical industry, leather, textile printing and dyeing, it can all discharge
The VOCs (abbreviation VOCs) such as aromatic hydrocarbons, oxygen-bearing organic matter (ester, alcohol, acid, ketone, aldehyde etc.), alkane, alkene.Volatilization
Property organic matter be to cause one of main nuisance of atmosphere pollution, and cause photochemical pollution, form fine particle (PM2.5)
Main source, cause the exception of mankind's central nervous system, respiratory system, immune system, reproductive system etc.
(J.J.Spivey,Ind.Eng.ChemRes 1987,26:2165-2180), acute and chronic poisoning, carcinogenic and gene are caused
Mutation etc..
Catalysis burning is current most widely used purifying volatile organic exhaust gas technology, and its operation principle is in catalyst
In the presence of volatile organic waste gas lower temperature occur oxidation reaction, generate harmless carbon dioxide and water.Catalysis burning
Technology has a wide range of application to volatile organic matter, can almost handle all VOCs, and non-secondary pollution.
The catalyst of purifying industrial waste gases is presently used for, mostly using cordierite honeycomb ceramic carrier, in ceramic honey comb table
The composite oxides such as face coating alumina, cerium oxide, zirconium oxide as Second support, then using infusion process carried noble metal Pd or
Pt。
Chinese invention patent CN102658136A discloses the preparation method of the exhaust gas purifying catalyst containing noble metal.This is urged
Agent preparation method is to use first prepares coating composite oxide material, then your composite oxide supported gold prepared by infusion process
Metal catalyst, then slurries are made by wet-milling, cordierite honeycomb ceramic carrier surface is coated to, however, the preparation of the catalyst
Method is more complicated.Chinese invention patent CN200510060542.9 discloses a kind of rare-earth composite porous aluminium oxide loaded Pd and urged
The preparation method of agent.The invention coats hydrated alumina using cordierite ceramic honeycomb as carrier, using colloidal sol dip coating, heat is inhaled
Attached method load compound cerium-Zirconium oxide and carried metal Pd active constituents technique be prepared for it is rare-earth composite porous aluminium oxide loaded
Pd catalyst.The process of cerium-carrying-Zirconium oxide is the nitrate solution using hot submersion cerium and zirconium, and the nitrate of absorption passes through
Precipitation, washing are crossed, thus, cause the uncertain of cerium-Zirconium oxide content and produce the waste water containing nitrate anion.
The content of the invention
The present invention is directed to existing volatile organic waste gas catalyst preparation process Shortcomings, to optimize preparation technology, subtract
In few preparation process for the purpose of the generation of harmful substance, raising catalyst performance.There is provided that a kind of activity is high, stability is high is used for
Eliminate catalyst of volatile organic matter and preparation method thereof.
To solve the technical problem, the technical solution adopted by the present invention is：
A kind of catalyst for being used to eliminate volatile organic matter, is applied by cordierite honeycomb ceramic carrier, first coating, second
Layer and the 3rd coating composition, first coating include Nb2O5、Y2O3、In2O3And ZnO, the content of first coating are small with 400 DEG C of roastings 4
When after coating quality be calculated as 40g/L；Second coating includes SnO2、In2O3And Rh, the content of second coating is with 400 DEG C of roastings
Coating quality after 4 hours is calculated as 5~20g/L；3rd coating includes Pt, and content is with the coating matter after 500 DEG C of roastings 4 hours
Amount is calculated as 0.1~0.5g/L.Nb in first coating2O5、Y2O3、In2O3Mass ratio with ZnO is 30:45:5:20, second applies
SnO in layer2、In2O3Mass ratio with Rh is 92:7:1.
The preparation method of the catalyst is：Catalyst is prepared using coating three times, and first time coating slurry is included with Nb2O5
The Nb (OH) of metering5, with Y2O3The Y (OH) of metering3, with In2O3In (the NO of metering3)3·5H2The O and Zn measured with ZnO
(OH)2, its mass ratio is 30:45:5:20, add ball milling 4 hours after water, then acidity is adjusted to pH=3.0 by enriching nitric acid, uniformly
Coated on cordierite honeycomb ceramic carrier, and with slurries unnecessary in gases at high pressure blowout honeycomb ceramic carrier hole, through 110
DEG C drying, 400 DEG C are calcined 4 hours；Second of coating slurry is included with SnO2The Sn (OH) of metering4, with In2O3The IN of metering
(NO3)3·5H2The O and Rh (NO measured with Rh3)3, its mass ratio is 92:7:1, add ball milling 4 hours after water, then enriching nitric acid
Acidity is adjusted to pH=3.0, is coated uniformly on the cordierite honeycomb ceramic carrier after coating for the first time, and blown with gases at high pressure
Go out slurries unnecessary in honeycomb ceramic carrier hole, through 110 DEG C of dryings, 400 DEG C are calcined 4 hours；Third time coating liquid is with Pt
The H of metering2PtCl6The aqueous solution, using dipping absorption method, the cordierite honeycomb ceramic carrier after second of coating of dipping, treat
H2PtCl6Completely after absorption, through 110 DEG C of dryings, 500 DEG C are calcined 4 hours, obtain finished catalyst.
Have catalytic activity high using catalyst made from preparation method of the present invention, heat endurance is high, can effectively eliminate and wave
Hair property organic matter.
Embodiment
The present invention is made with reference to embodiment and further being illustrated, but the present invention is not limited to these implementations
Example.
Embodiment 1
(1) first coating：According to Nb2O5The Nb (OH) of metering5, with Y2O3The Y (OH) of metering3, with In2O3The In of metering
(NO3)3·5H2The O and Zn (OH) measured with ZnO2, its mass ratio is 30:45:5:20, Nb (OH) is weighed respectively5150g、Y
(OH)3225g、In(NO3)3·5H2O 25g and Zn (OH)2100g, add water to ball milling 4 hours, Ran Houjia after gross mass is 2500g
Acidity is adjusted to pH=3.0 by concentrated nitric acid.By cordierite honeycomb ceramic carrier (200 mesh/in2) impregnated, and use gases at high pressure
Blow out slurries unnecessary in cordierite honeycomb ceramic carrier hole.Then through 110 DEG C of dryings, 400 DEG C are calcined 4 hours.With 400 DEG C
Coating quality after being calcined 4 hours calculates, and the content of first coating is 40g/L.
(2) second coating：According to SnO2The Sn (OH) of metering4, with In2O3In (the NO of metering3)3·5H2O and in terms of Rh
Rh (the NO of amount3)3, its mass ratio is 92:7:1, Sn (OH) is weighed respectively4460g、In(NO3)3·5H2O 35g and Rh (NO3)35g, ball milling 4 hours after gross mass is 2.5kg are added water to, then acidity is adjusted to pH=3.0 by enriching nitric acid.Coating first is applied
The cordierite honeycomb ceramic of layer impregnates above-mentioned slurry, and slurry unnecessary in cordierite honeycomb ceramic hole is blown out with gases at high pressure
Liquid.Then through 110 DEG C of dryings, 400 DEG C are calcined 4 hours.Coating quality after being calcined 4 hours with 400 DEG C calculates, second coating
Content is 20g/L.
(3) the 3rd coatings：Weigh the H containing Pt 3g2PtCl6Solution, add deionized water to be made into 20L solution, use concentrated nitric acid
Acidity is adjusted to pH=4.5.The cordierite honeycomb ceramic dipping that 10L is scribbled into above-mentioned two coating wherein, makes H2PtCl6Completely
Carrier surface is adsorbed onto, the cordierite honeycomb ceramic containing precious metals pt is separated with the aqueous solution, through 110 DEG C of dryings, 500 DEG C of roastings
Burn 4 hours, the catalyst of the present invention is made.Coating quality after being calcined 4 hours with 500 DEG C calculates, the Pt contents of the 3rd coating
For 0.3g/L.
(4) catalyst cleaning organic exhaust gas performance test：Catalyst performance evaluation is carried out in normal pressure microreactor, is led to
Cross air and carry benzene and ethyl acetate mixture as simulation volatile organic waste gas, the wherein concentration of benzene is 1500mg/m3, acetic acid
The concentration of ethyl ester is 2000mg/m3) catalytic reaction air speed is 20000h-1.Volatile organic matter concentration uses gas phase before and after reaction
Chromatogram (FID) is analyzed.When the volatile organic waste gas of catalyst eliminates performance using the conversion ratio of benzene or ethyl acetate as 99% pair
The reaction temperature T answered99To represent, 1 the results are shown in Table.
Embodiment 2
(1) first coating：The preparation method of first coating is same as Example 1.
(2) second coating：According to SnO2The Sn (OH) of metering4, with In2O3In (the NO of metering3)3·5H2O and in terms of Rh
Rh (the NO of amount3)3, its mass ratio is 92:7:1, Sn (OH) is weighed respectively4460g、In(NO3)3·5H2O 35g and Rh (NO3)35g, ball milling 4 hours after gross mass is 5kg are added water to, then acidity is adjusted to pH=3.0 by enriching nitric acid.First coating will be coated
Cordierite honeycomb ceramic impregnate above-mentioned slurry, and with slurries unnecessary in gases at high pressure blowout cordierite honeycomb ceramic hole.
Then through 110 DEG C of dryings, 400 DEG C are calcined 4 hours.Coating quality after being calcined 4 hours with 400 DEG C calculates, and second coating contains
Measure as 10g/L.
(3) the 3rd coatings：The preparation method of 3rd coating is same as Example 1.
(4) catalyst cleaning organic exhaust gas performance test：Catalyst cleaning organic exhaust gas performance test and the phase of embodiment 1
Together.
Embodiment 3
(1) first coating：The preparation method of first coating is same as Example 1.
(2) second coating：According to SnO2The Sn (OH) of metering4, with In2O3In (the NO of metering3)3·5H2O and in terms of Rh
Rh (the NO of amount3)3, its mass ratio is 92:7:1, Sn (OH) is weighed respectively4460g、In(NO3)3·5H2O 35g and Rh (NO3)35g, ball milling 4 hours after gross mass is 10kg are added water to, then acidity is adjusted to pH=3.0 by enriching nitric acid.Coating first is applied
The cordierite honeycomb ceramic of layer impregnates above-mentioned slurry, and slurry unnecessary in cordierite honeycomb ceramic hole is blown out with gases at high pressure
Liquid.Then through 110 DEG C of dryings, 400 DEG C are calcined 4 hours.Coating quality after being calcined 4 hours with 400 DEG C calculates, second coating
Content is 5g/L.
(3) the 3rd coatings：The preparation method of 3rd coating is same as Example 1.
(4) catalyst cleaning organic exhaust gas performance test：Catalyst cleaning organic exhaust gas performance test and the phase of embodiment 1
Together.
Embodiment 4
(1) first coating：The preparation method of first coating is same as Example 1
(2) second coating：The preparation method of second coating is same as Example 2.
(3) the 3rd coatings：Weigh the H containing Pt 1g2PtCl6Solution, add deionized water to be made into 20L solution, use concentrated nitric acid
Acidity is adjusted to pH=4.5.The cordierite honeycomb ceramic dipping that 10L is scribbled into above-mentioned two coating wherein, makes H2PtCl6Completely
Carrier surface is adsorbed onto, the cordierite honeycomb ceramic containing precious metals pt is separated with the aqueous solution, through 110 DEG C of dryings, 500 DEG C of roastings
Burn 4 hours, the catalyst of the present invention is made.Coating quality after being calcined 4 hours with 500 DEG C calculates, the Pt contents of the 3rd coating
For 0.1g/L.
(4) catalyst cleaning organic exhaust gas performance test：Catalyst cleaning organic exhaust gas performance test and the phase of embodiment 1
Together.
Embodiment 5
(1) first coating：The preparation method of first coating is same as Example 1
(2) second coating：The preparation method of second coating is same as Example 2.
(3) the 3rd coatings：Weigh the H containing Pt 5g2PtCl6Solution, add deionized water to be made into 20L solution, use concentrated nitric acid
Acidity is adjusted to pH=4.5.The cordierite honeycomb ceramic dipping that 10L is scribbled into above-mentioned two coating wherein, makes H2PtCl6Completely
Carrier surface is adsorbed onto, the cordierite honeycomb ceramic containing precious metals pt is separated with the aqueous solution, through 110 DEG C of dryings, 500 DEG C of roastings
Burn 4 hours, the catalyst of the present invention is made.Coating quality after being calcined 4 hours with 500 DEG C calculates, the Pt contents of the 3rd coating
For 0.5g/L.
(4) catalyst cleaning organic exhaust gas performance test：Catalyst cleaning organic exhaust gas performance test and the phase of embodiment 1
Together.
The reactivity worth of the embodiment catalyst of table 1
Embodiment 1-5 catalyst is can be seen that from the catalyst effect of the embodiment catalyst of table 1 to urge ethyl acetate
Change performance difference very little, however it is larger to the catalytic performance difference of benzene, and wherein the catalyst of embodiment 5 all has to benzene and ethyl acetate
There is relatively good effect, the purified treatment available for industrial discharge volatile organic matter.
Claims (2)
- A kind of 1. catalyst for being used to eliminate volatile organic matter, it is characterised in that：The catalyst is carried by cordierite honeycomb ceramic Body, first coating, second coating and the 3rd coating composition, first coating include Nb2O5、Y2O3、In2O3And ZnO, first coating Coating quality after content is calcined 4 hours with 400 DEG C is calculated as 40g/L；Second coating includes SnO2、In2O3And Rh, second applies Coating quality after the content of layer is calcined 4 hours with 400 DEG C is calculated as 5~20g/L；3rd coating includes Pt, and content is with 500 DEG C Coating quality after being calcined 4 hours is calculated as 0.1~0.5g/L；Nb in first coating2O5、Y2O3、In2O3With ZnO mass ratio For 30:45:5:20, SnO in second coating2、In2O3Mass ratio with Rh is 92:7:1.
- 2. the preparation method of catalyst described in claim 1 is, it is held sign and is：Catalyst is made using coating three times, and first Secondary coating slurry is included with Nb2O5The Nb (OH) of metering5, with Y2O3The Y (OH) of metering3, with In2O3In (the NO of metering3)3·5H2O With the Zn (OH) measured with ZnO2, its mass ratio is 30:45:5:20, add ball milling 4 hours after water, then enriching nitric acid is by acidity PH=3.0 is adjusted to, is coated uniformly on cordierite honeycomb ceramic carrier, and with gases at high pressure blowout honeycomb ceramic carrier hole Unnecessary slurries, through 110 DEG C of dryings, 400 DEG C are calcined 4 hours；Second of coating slurry is included with SnO2The Sn (OH) of metering4, with In2O3IN (the NO of metering3)3·5H2The O and Rh (NO measured with Rh3)3, its mass ratio is 92:7:1, add ball milling 4 hours after water, Then acidity is adjusted to pH=3.0 by enriching nitric acid, is coated uniformly on the cordierite honeycomb ceramic carrier after coating for the first time, and With slurries unnecessary in gases at high pressure blowout honeycomb ceramic carrier hole, through 110 DEG C of dryings, 400 DEG C are calcined 4 hours；For the third time Coating liquid is the H measured with Pt2PtCl6The aqueous solution, using dipping absorption method, the cordierite honeycomb pottery after second of coating of dipping Ceramic carrier, treat H2PtCl6Completely after absorption, through 110 DEG C of dryings, 500 DEG C are calcined 4 hours.
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Cited By (2)
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| CN110124689A (en) * | 2019-05-31 | 2019-08-16 | 金华铂锐催化科技有限公司 | A kind of catalyst and preparation method thereof for the purification of kitchen garbage fermentation tail gas |
| CN115990523A (en) * | 2021-10-20 | 2023-04-21 | 中国石油化工股份有限公司 | Monolithic catalyst, and preparation method and application thereof |
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