CN106807398B - It is a kind of under water vapour environment eliminate carbon monoxide and the catalyst of formaldehyde and preparation method thereof - Google Patents
It is a kind of under water vapour environment eliminate carbon monoxide and the catalyst of formaldehyde and preparation method thereof Download PDFInfo
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Abstract
It is a kind of under water vapour environment eliminate carbon monoxide and the catalyst of formaldehyde and preparation method thereof, with Ce0.8Fe0.1Co0.1VO4Composite oxides are carrier, Pt is that active component, In and K are co-catalyst composition；The quality of precious metals pt is Ce0.8Fe0.1Co0.1VO4The 1-3% of composite oxide carrier；The quality of co-catalyst In is Ce0.8Fe0.1Co0.1VO4The 0.05-0.3% of composite oxide carrier；The quality of co-catalyst K is Ce0.8Fe0.1Co0.1VO4The 0.01-0.1% of composite oxide carrier.The catalyst prepares Ce using sol-gal process0.8Fe0.1Co0.1VO4Composite oxide carrier, then by Pt (NO3)2、In(NO3)3, potassium citrate mixed solution, with infusion process prepare Ce0.8Fe0.1Co0.1VO4Supporting Pt, In, K catalyst.Activity and stability of the catalyst under water vapour environment can be significantly increased in the catalyst.
Description
Technical field
The present invention relates to a kind of chemical catalysts, in particular to a kind of for eliminating carbon monoxide and formaldehyde under water vapour environment
Catalyst and preparation method thereof.
Background technique
CO and formaldehyde are typical toxic and harmful gas, are most commonly seen one of gaseous pollutants.Carbon monoxide intrusion
Body will be combined into carbonyl haemoglobin with hemoglobin quickly, so that it is red to hinder oxygen with hemoglobin to be combined into oxygenated blood
Albumen.Poisoner just will appear weak pulse, and breathing is slack-off, and last failure is lethal.Formaldehyde is more highly toxic substance, toxic in China
Formaldehyde is in second on chemicals priority acccess control list.Concentration of formaldehyde reaches 0.06-0.07mg/m3 in every cubic metres of air
When, children will occur slightly to pant.When formaldehyde content in indoor air is 0.1mg/m3, just there are peculiar smell and sense of discomfort；It reaches
When to 0.5mg/m3, eyes can be stimulated, cause to shed tears；Reach 0.6mg/m3, throat discomfort or pain can be caused.Long Term Contact is low
Dosage formaldehyde can also cause chronic respiratory disease, and newly-decorated room content of formaldehyde is higher, be the main inducing of numerous diseases.
CO is eliminated by catalysis oxidation and formaldehyde is the common method of industry, since there are many elimination CO and formaldehyde under low temperature
Aspect all has a very high practical value, therefore researches and develops low temperature or eliminate CO at room temperature and the catalyst of formaldehyde is constantly subjected to science
The concern on boundary and industry.CO is eliminated, air cleaning, closed-circulation CO2 laser, CO gas sensing are mainly used for
CO elimination in device, the control of vehicle exhaust, CO breathing mask and closed system etc..And formaldehyde is eliminated, and is mainly used for
The indoor air cleaning of civil building engineering.Carbon monoxide and formaldehyde eliminate catalyst used mainly have noble metal catalyst and
Non-precious metal catalyst, noble metal is with its good CO, O2Absorption and activity function are considered as catalysis CO and the complete oxygen of formaldehyde
The preferred catalyst of change.Researcher is often through the preparation method for changing catalyst, regulating catalyst carrier and co-catalyst
To improve the performance of Pt catalyst, the stability used under the stability especially water vapour environment of effort raising catalyst.
Summary of the invention
It is an object of the invention to eliminate the problem of stability difference existing for catalyst for existing carbon monoxide and formaldehyde,
It provides a kind of for eliminating carbon monoxide and the high performance catalyst of formaldehyde and preparation method thereof under water vapour environment.
To solve this technical problem, the technical solution adopted by the present invention are as follows:
A kind of Pt-In-K/Ce for elimination carbon monoxide and formaldehyde under water vapour environment0.8Fe0.1Co0.1VO4Catalyst,
It is characterized by: the catalyst is with Ce0.8Fe0.1Co0.1VO4Composite oxides are carrier, Pt is that active component, In and K are to help to urge
Agent composition.Ce0.8Fe0.1Co0.1VO4In composite oxide carrier, the molar ratio of Ce, Fe, Co, V are 0.8:0.1:0.1:1；It is expensive
The quality of Pt metal is Ce0.8Fe0.1Co0.1VO4The 1-3% of composite oxide carrier；The quality of co-catalyst In is
Ce0.8Fe0.1Co0.1VO4The 0.05-0.3% of composite oxide carrier；The quality of co-catalyst K is Ce0.8Fe0.1Co0.1VO4It is compound
The 0.01-0.1% of oxide carrier.
The catalyst the preparation method comprises the following steps: using sol-gal process prepare Ce0.8Fe0.1Co0.1VO4Composite oxide carrier,
Then by Pt (NO3)2、In(NO3)3, potassium citrate mixed solution, with infusion process prepare Ce0.8Fe0.1Co0.1VO4Supporting Pt, In, K
Catalyst, i.e. Pt-In-K/Ce0.8Fe0.1Co0.1VO4Catalyst.
Specifically comprise the following steps:
(1) by Ce (NO3)3·6H2O、Fe(NO3)3·9H2O、Co(NO3)3·6H2O、VOC2O4·5H2O and citric acid are pressed
It is that 0.80:0.10:0.10:1.0:0.50 is dissolved in deionized water according to molar ratio, in 90 DEG C of stirring in water bath to gel after being completely dissolved
State, then 120 DEG C drying 8 hours, finally roast 4 hours under 500 DEG C of air atmospheres, obtain Ce0.8Fe0.1Co0.1VO4It carries
Body, citric acid resolves into carbon dioxide completely by roasting and water leaves catalyst.
(2) by Pt (NO3)2、In(NO3)3, potassium citrate mixed solution be added Ce0.8Fe0.1Co0.1VO4In carrier, dipping 2
Hour, then 90 DEG C of water-bath fried drys, 120 DEG C are dried 8 hours, are roasted 5 hours under last 350 DEG C of nitrogen atmospheres, are then switched to sky
300 DEG C of gas atmosphere roast 4 hours, obtain Pt-In-K/Ce0.8Fe0.1Co0.1VO4Catalyst.Wherein the quality of precious metals pt is
Ce0.8Fe0.1Co0.1VO4The 1-3% of composite oxide carrier；The quality of co-catalyst In is Ce0.8Fe0.1Co0.1VO4Combined oxidation
The 0.05-0.3% of object carrier；The quality of co-catalyst K is Ce0.8Fe0.1Co0.1VO4The 0.01- of composite oxide carrier
0.1%.
The catalyst prepared in aforementioned manners, by Ce0.8Fe0.1Co0.1VO4Composite oxide carrier and precious metals pt are
Active component, In and K are co-catalyst combination, and activity and stabilization of the catalyst under water vapour environment can be significantly increased
Property.
Specific embodiment
The present invention is made below with reference to embodiment and further being illustrated, but the present invention is not limited to these implementations
Example.
Embodiment 1
(1) by Ce (NO3)3·6H2O、Fe(NO3)3·9H2O、Co(NO3)3·6H2O、VOC2O4·5H2O and citric acid are pressed
It is 0.80:0.10:0.10:1.0:0.50 according to molar ratio, by 69.5 grams of Ce (NO3)3·6H2O, 8.08 grams of Fe (NO3)3·9H2O、
9.03 grams of Co (NO3)3·6H2O, 49.0 grams of VOC2O4·5H2O and 19.2 gram of citric acid is dissolved in deionized water, after being completely dissolved in
90 DEG C of stirring in water bath are to gel state, and then 120 DEG C drying 8 hours, finally roast 4 hours under 500 DEG C of air atmospheres, obtain
Ce0.8Fe0.1Co0.1VO4Carrier.
(2) according to Pt, In and K in Ce0.8Fe0.1Co0.1VO4Mass percentage in composite oxide carrier is respectively
1.0%, 0.20% and 0.05%.By the Pt (NO containing 1.0 grams of Pt3)2Solution, 0.68 gram of In (NO3)3·5H2O and 0.14 gram of lemon
Lemon acid potassium is diluted to 100ml with deionized water, is completely dissolved.It is then added to 100g Ce0.8Fe0.1Co0.1VO4Composite oxides
In carrier, impregnate 2 hours, then 90 DEG C of water-bath fried drys, 120 DEG C are dried 8 hours, then roasted 5 hours under 350 DEG C of nitrogen atmospheres,
It is finally switched to 300 DEG C of air atmosphere to roast 4 hours, obtains the Pt-In-K/Ce of embodiment 10.8Fe0.1Co0.1VO4Catalyst.
(3) the catalyst tabletting prepared is sieved by catalyst activity test condition, selects 100-120 purpose to urge later
Catalyst particles, dosage 0.1g are fitted into the quartz ampoule (internal diameter 6mm) for reaction.CO is aoxidized, reaction gas 1%
CO+1%O2+ 2%H2O, remaining is nitrogen, and wherein air speed is 60000mLg-1h-1, measure the CO reactivity worth of catalyst.It is right
In oxidation of formaldehyde, reaction gas is 0.1% formaldehyde+1%O2+ 2%H2O, remaining is nitrogen, and wherein air speed is 60000mLg-1h-1,
Measure the CO reactivity worth of catalyst.The CO oxidation susceptibility of catalyst indicates with conversion ratio under 70 DEG C of reaction conditions, respectively
The conversion ratio variation of measurement 1 hour and 10 hours, to investigate the stability of catalyst.The oxidation of formaldehyde performance of catalyst is with 60 DEG C
Conversion ratio under reaction condition indicates, measures 1 hour and 10 hours conversion ratio respectively and changes, to investigate the stabilization of catalyst
Property.The reactivity worth of catalyst is shown in Table 1.
Embodiment 2
(1)Ce0.8Fe0.1Co0.1VO4The preparation method of carrier is same as Example 1.
(2) according to Pt, In and K in Ce0.8Fe0.1Co0.1VO4Mass percentage in composite oxide carrier is respectively
2.0%, 0.20% and 0.05%.By the Pt (NO containing 2.0 grams of Pt3)2Solution, 0.68 gram of In (NO3)3·5H2O and 0.14 gram of lemon
Lemon acid potassium is diluted to 100ml with deionized water, is completely dissolved.It is then added to 00g Ce0.8Fe0.1Co0.1VO4Composite oxides
In carrier, impregnate 2 hours, then 90 DEG C of water-bath fried drys, 120 DEG C are dried 8 hours, then roasted 5 hours under 350 DEG C of nitrogen atmospheres,
It is finally switched to 300 DEG C of air atmosphere to roast 4 hours, obtains the Pt-In-K/Ce of embodiment 20.8Fe0.1Co0.1VO4Catalyst.
(3) catalyst activity test condition is same as Example 1.The reactivity worth of catalyst is shown in Table 1.
Embodiment 3
(1)Ce0.8Fe0.1Co0.1VO4The preparation method of carrier is same as Example 1.
(2) according to Pt, In and K in Ce0.8Fe0.1Co0.1VO4Mass percentage in composite oxide carrier is respectively
3.0%, 0.20% and 0.05%.By the Pt (NO containing 3.0 grams of Pt3)2Solution, 0.68 gram of In (NO3)3·5H2O and 0.14 gram of lemon
Lemon acid potassium is diluted to 100ml with deionized water, is completely dissolved.It is then added to 100g Ce0.8Fe0.1Co0.1VO4Composite oxides
In carrier, impregnate 2 hours, then 90 DEG C of water-bath fried drys, 120 DEG C are dried 8 hours, then roasted 5 hours under 350 DEG C of nitrogen atmospheres,
It is finally switched to 300 DEG C of air atmosphere to roast 4 hours, obtains the Pt-In-K/Ce of embodiment 30.8Fe0.1Co0.1VO4Catalyst.
(3) catalyst activity test condition is same as Example 1.The reactivity worth of catalyst is shown in Table 1.
Embodiment 4
(1)Ce0.8Fe0.1Co0.1VO4The preparation method of carrier is same as Example 1.
(2) according to Pt, In and K in Ce0.8Fe0.1Co0.1VO4Mass percentage in composite oxide carrier is respectively
2.0%, 0.05% and 0.10%.By the Pt (NO containing 2.0 grams of Pt3)2Solution, 0.17 gram of In (NO3)3·5H2O and 0.28 gram of lemon
Lemon acid potassium is diluted to 100ml with deionized water, is completely dissolved.Then 100g Ce is added0.8Fe0.1Co0.1VO4Composite oxides carry
It in body, impregnates 2 hours, then 90 DEG C of water-bath fried drys, 120 DEG C are dried 8 hours, roast 5 hours under last 350 DEG C of nitrogen atmospheres, so
After be switched to 300 DEG C of air atmosphere roast 4 hours, obtain the Pt-In-K/Ce of embodiment 40.8Fe0.1Co0.1VO4Catalyst.
(3) catalyst activity test condition is same as Example 1.The reactivity worth of catalyst is shown in Table 1.
Embodiment 5
(1)Ce0.8Fe0.1Co0.1VO4The preparation method of carrier is same as Example 1.
(2) according to Pt, In and K in Ce0.8Fe0.1Co0.1VO4Mass percentage in composite oxide carrier is respectively
2.0%, 0.10% and 0.05%.By the Pt (NO containing 2.0 grams of Pt3)2Solution, 0.34 gram of In (NO3)3·5H2O and 0.14 gram of lemon
Lemon acid potassium is diluted to 100ml with deionized water, is completely dissolved.It is then added to 100g Ce0.8Fe0.1Co0.1VO4Composite oxides
In carrier, impregnate 2 hours, then 90 DEG C of water-bath fried drys, 120 DEG C are dried 8 hours, then roasted 5 hours under 350 DEG C of nitrogen atmospheres,
It is finally switched to 300 DEG C of air atmosphere to roast 4 hours, obtains the Pt-In-K/Ce of embodiment 50.8Fe0.1Co0.1VO4Catalyst.
(3) catalyst activity test condition is same as Example 1.The reactivity worth of catalyst is shown in Table 1.
Embodiment 6
(1)Ce0.8Fe0.1Co0.1VO4The preparation method of carrier is same as Example 1.
(2) according to Pt, In and K in Ce0.8Fe0.1Co0.1VO4Mass percentage in composite oxide carrier is respectively
2.0%, 0.30% and 0.01%.By the Pt (NO containing 2.0 grams of Pt3)2Solution, 1.02 grams of In (NO3)3·5H2O and 0.028 gram
Potassium citrate is diluted to 100ml with deionized water, is completely dissolved.It is then added to 100g Ce0.8Fe0.1Co0.1VO4Combined oxidation
It in object carrier, impregnates 2 hours, then 90 DEG C of water-bath fried drys, 120 DEG C are dried 8 hours, and then roasting 5 is small under 350 DEG C of nitrogen atmospheres
When, it is finally switched to 300 DEG C of air atmosphere and roasts 4 hours, obtain the Pt-In-K/Ce of embodiment 60.8Fe0.1Co0.1VO4Catalysis
Agent.
(3) catalyst activity test condition is same as Example 1.The reactivity worth of catalyst is shown in Table 1.
Table 1: the activity that embodiment catalyst carbon monoxide and formaldehyde are eliminated
It can be seen that catalyst of the invention has preferable effect to carbon monoxide and formaldehyde catalytic removal under water vapour environment
Fruit, although the catalyst of embodiment 3 eliminates carbon monoxide and the effect of formaldehyde is best, precious metals pt comparision contents are high.?
In the embodiment that bullion content is 2%, the catalyst performance of embodiment 5 is best.Conversion in 1 hour and 10 hours is reacted in comparison
Rate, catalyst activity is obvious in addition to embodiment 1 declines, and other embodiments catalyst performance is more stable.
Claims (1)
1. it is a kind of under water vapour environment eliminate carbon monoxide and formaldehyde catalyst, it is characterised in that: the catalyst with
Ce0.8Fe0.1Co0.1VO4Composite oxides are carrier, Pt is that active component, In and K are co-catalyst composition；The matter of precious metals pt
Amount is Ce0.8Fe0.1Co0.1VO4The 1-3% of composite oxide carrier；The quality of co-catalyst In is Ce0.8Fe0.1Co0.1VO4It is compound
The 0.05-0.3% of oxide carrier；The quality of co-catalyst K is Ce0.8Fe0.1Co0.1VO4The 0.01- of composite oxide carrier
0.1%；The catalyst the preparation method comprises the following steps: using sol-gal process prepare Ce0.8Fe0.1Co0.1VO4Composite oxide carrier, so
Afterwards by Pt (NO3)2、In(NO3)3, potassium citrate mixed solution, with infusion process prepare Ce0.8Fe0.1Co0.1VO4Supporting Pt, In, K are urged
Agent,
Specifically comprise the following steps:
(1) by Ce (NO3)3·6H2O、Fe(NO3)3·9H2O、Co(NO3)3·6H2O、VOC2O4·5H2O and citric acid are according to rubbing
You are than being that 0.80:0.10:0.10:1.0:0.50 is dissolved in deionized water, in 90 DEG C of stirring in water bath to gel state after being completely dissolved,
Then 120 DEG C drying 8 hours finally roast 4 hours under 500 DEG C of air atmospheres, obtain Ce0.8Fe0.1Co0.1VO4Carrier；
(2) by Pt (NO3)2、In(NO3)3, potassium citrate mixed solution be added Ce0.8Fe0.1Co0.1VO4In carrier, impregnate 2 hours,
Then 90 DEG C of water-bath fried drys, 120 DEG C are dried 8 hours, are roasted 5 hours under last 350 DEG C of nitrogen atmospheres, are then switched to air atmosphere
300 DEG C roast 4 hours, obtain catalyst, and wherein the quality of precious metals pt is Ce0.8Fe0.1Co0.1VO4Composite oxide carrier
1-3%；The quality of co-catalyst In is Ce0.8Fe0.1Co0.1VO4The 0.05-0.3% of composite oxide carrier；Co-catalyst K's
Quality is Ce0.8Fe0.1Co0.1VO4The 0.01-0.1% of composite oxide carrier.
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| CN109225239A (en) * | 2018-09-03 | 2019-01-18 | 金华职业技术学院 | CO oxidation catalyst and preparation method thereof under a kind of steam and carbon dioxide atmosphere |
| CN110898834B (en) * | 2019-11-29 | 2022-08-12 | 金华铂锐催化科技有限公司 | Catalyst for eliminating volatile organic compounds and preparation method thereof |
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| CN106807398A (en) | 2017-06-09 |
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