CN109317141A - A kind of preparation method of the Pt base catalyst for benzene catalysis oxidation - Google Patents
A kind of preparation method of the Pt base catalyst for benzene catalysis oxidation Download PDFInfo
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- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 239000003054 catalyst Substances 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims abstract description 31
- 230000003647 oxidation Effects 0.000 title claims abstract description 15
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 15
- 238000006555 catalytic reaction Methods 0.000 title claims abstract description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 83
- 210000003278 egg shell Anatomy 0.000 claims abstract description 44
- 102000002322 Egg Proteins Human genes 0.000 claims abstract description 43
- 108010000912 Egg Proteins Proteins 0.000 claims abstract description 43
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 30
- 235000008109 Thuja occidentalis Nutrition 0.000 claims abstract description 19
- 239000002105 nanoparticle Substances 0.000 claims abstract description 7
- 230000009467 reduction Effects 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 31
- 241000218636 Thuja Species 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 13
- 229910001868 water Inorganic materials 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 7
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 claims description 6
- 239000012298 atmosphere Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000002243 precursor Substances 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000002808 molecular sieve Substances 0.000 claims description 3
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims description 2
- 239000012855 volatile organic compound Substances 0.000 abstract description 32
- 238000000034 method Methods 0.000 abstract description 16
- 238000006243 chemical reaction Methods 0.000 abstract description 9
- 230000003197 catalytic effect Effects 0.000 abstract description 8
- 239000003638 chemical reducing agent Substances 0.000 abstract description 3
- 239000002028 Biomass Substances 0.000 abstract 1
- 240000003243 Thuja occidentalis Species 0.000 abstract 1
- 238000001354 calcination Methods 0.000 abstract 1
- 229910000510 noble metal Inorganic materials 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 229910000314 transition metal oxide Inorganic materials 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000009841 combustion method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000002082 metal nanoparticle Substances 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- -1 when not roasting Substances 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- 208000005623 Carcinogenesis Diseases 0.000 description 1
- 229910016978 MnOx Inorganic materials 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 208000031320 Teratogenesis Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000036952 cancer formation Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 231100000504 carcinogenesis Toxicity 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- UBEWDCMIDFGDOO-UHFFFAOYSA-N cobalt(II,III) oxide Inorganic materials [O-2].[O-2].[O-2].[O-2].[Co+2].[Co+3].[Co+3] UBEWDCMIDFGDOO-UHFFFAOYSA-N 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 210000000987 immune system Anatomy 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000006552 photochemical reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/58—Platinum group metals with alkali- or alkaline earth metals
-
- 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
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- B01J35/40—
Abstract
The present invention discloses a kind of preparation method of Pt base catalyst for benzene catalysis oxidation.The present invention is that the biomass reduction method based on green prepares loaded platinum catalyst, and preparation method is using discarded egg shell (Eggshell) as template and carrier；Again using phyteral arbor-vitae extracting solution as reducing agent, platinum presoma is reduced to platinum (Pt) nano particle；To obtain Pt/Eggshell catalyst.Finally, gained catalyst to be used for the removal of benzene in VOCs, this programme can realize that platinum load capacity is 0.75wt%(theoretical negative carrying capacity), 400oWhen C Ar calcination, the benzene conversion ratio of 1000ppm reaches temperature (T required when 90%90%) it is only 178oC(air speed SV=80,000mL/g/h)；Pt/Eggshell catalyst shows good catalytic activity for the removal of benzene, with important application prospects.
Description
Technical field
The invention belongs to technical field of nanometer material preparation, and in particular to be that a kind of Pt base for benzene catalysis oxidation is urged
The preparation method of agent.
Background technique
The typical volatile organic compounds (VOCs) such as benzene,toluene,xylene is to human health and ground ball in atmosphere
Border constitutes serious threat, mainly there is the following aspects: (1) most of VOCs have penetrating odor or stink, seriously
Influence people's lives quality；(2) VOCs complicated component has the characteristics such as infiltration, volatilization and liposoluble, also has toxicity, thorn
The harm for swashing property and teratogenesis carcinogenesis, especially benzene,toluene,xylene and formaldehyde is maximum；(3) majority VOCs meeting and atmosphere
In NOxPhotochemical reaction occurs, forms secondary pollution or the active intermediate product of extensive chemical, to increase smog and smelly
The concentration on ground of oxygen, endangers human health and crop growth；(4) part VOCs can destroy ozone layer, such as fluorochlorohydrocarbon substance,
To exacerbate harm of the ultraviolet light to human skin, eyes and immune system.
Currently, VOCs is classified as priority pollutant by China.Traditional VOCs control technology is basically divided into two major classes:
Recovery technology and destruction technology.Recovery technology is the property according to VOCs itself, utilizes absorption process, absorption method, condensation method and film
Partition method, it can be achieved that VOCs transfer and enrichment, but VOCs can not be destroyed.And destroying technology then is using chemistry or biology side
Method makes VOCs molecule be converted into the water and carbon dioxide of small molecule, mainly includes direct combustion method, biological degradation method and catalysis
Oxidizing process.Direct combustion method needs higher operation temperature, and energy consumption is huge, it is also possible to generate toxic secondary pollution；Biology
Method is the metabolic process using microorganism by organic pollutant degradation, and reaction condition is mild, reaction speed is fast, wide adaptation range etc.
Advantage, however the method is mainly for water phase low concentration VOCs, and requires reactor volume big.As a kind of terminal processing method,
Catalytic oxidation be using catalyst by VOCs direct oxidation be free of contamination CO2And H2O can be carried out at a lower temperature,
At low cost, thoroughly, secondary pollution is small for degradation, and removal efficiency is high, so that catalytic oxidation is considered as before most developing in recent years
The VOCs minimizing technology of scape.
There are two main classes for typical VOCs oxidation catalyst, i.e. loaded noble metal catalyst and transition metal oxide is urged
Agent.Noble metal catalyst has preferable activity and resistance to deactivation, is easy to regenerate, although its higher cost, is still
The first choice of VOCs oxidation catalyst；Simple transition metal oxide can be used for oxidation VOCs, however under equal conditions,
Catalyst activity is significantly lower than the transition metal oxide of carried noble metal.
At present in loaded noble metal catalyst, platinum, palladium and silver are the active components being widely studied, they are usually negative
It is loaded in transition metal oxide (such as Al2O3、TiO2、SiO2、MnOx、CeO2、Co3O4And its mixture etc.) on, your gold improved
The dispersion degree of category, increases the absorption of reactant, and reduces the load capacity of noble metal.However usually, transition metal oxide
Carrier higher cost, and preparation process is complicated, preparation process generates biggish pollution.However discarded egg shell is recycled into benefit
With, the catalysis oxidation of VOCs is used for as carrier-supported precious metal nano particle, it is not only economic and environment-friendly, realize the recycling of waste
It utilizes, and raw material is easy to get, it is low in cost.It is used for VOCs's for egg shell as carrier-supported precious metal currently, not yet having been reported that
Catalysis oxidation.
In recent years, noble metal nano particles and its catalyst are prepared using biological reducing method, biomolecule had both served as reduction
Agent, and play the part of protectant role, the preferable nano particle of stability can be not only obtained, conventional chemistry is obtained and is difficult to obtain
It is some as a result, and process do not need to introduce other chemical reagent, can also using green living resources so that the method at
For a hot spot in noble metal nano particles Study on Preparation Technology.
Summary of the invention
The object of the present invention is to provide a kind of preparation methods of Pt base catalyst for benzene catalysis oxidation, are applied to
The catalytic elimination of benzene in VOCs, the catalyst show good catalytic activity, and preparation condition is mild, at low cost, and green is without dirt
Dye, simple process are stablized.
Loaded noble metal catalyst proposed by the present invention, preparation method are discarded egg shells as carrier；Again to plant
Substance arbor-vitae is reducing agent, and platinum presoma is reduced to Pt nanoparticle；To obtain Pt/Eggshell catalyst.
A kind of preparation method of the Pt base catalyst for benzene catalysis oxidation, specifically includes the following steps:
(1) 10~30 mL distilled water are taken, the platinum presoma of egg shell powder and 20~600 μ L that 0.1~0.5 g is added is molten
Liquid stirs 1~2 h under 50~100 °C；
(2) 10~30 mL phyteral extracting solutions are added obtained by the step (1) in mixed solution, stir 1 under 50~100 °C~
2 h；
(3) by above-mentioned material filtration washing, dry 5~12 h under 50~90 °C, then 400 under air or inert atmosphere
DEG C roasting 4 h to get load capacity be 0.1~2.0wt% Pt/Eggshell catalyst.
The preparation of carrier egg shell powder needed for catalyst the following steps are included:
1) discarded egg shell is collected；
2) it after washing egg shell repeatedly with clear water, spontaneously dries at room temperature;
3) after grinding dry egg shell, by 20-100 mesh molecular sieve to obtain egg shell powder.
Platinum precursor solution used in the step (1) is platinum acid chloride solution, and the concentration of platinum acid chloride solution is 35.1
mM。
Phyteral extracting solution described in the step (2) is arbor-vitae extracting solution, the concentration of the arbor-vitae extracting solution is 2 ~
20 g/L。
The volume ratio of arbor-vitae extracting solution and platinum precursor solution is 10 ~ 30:0.02 ~ 0.6.
The preparation method of arbor-vitae extracting solution includes: to weigh arbor vitae leaf dried powder in conical flask, deionized water is added, by it
It is placed in 30 °C of water bath with thermostatic control shaking tables and vibrates 2 h, filter to take its filtrate and obtain arbor-vitae extracting solution.
The platinum presoma being adsorbed on eggshell in advance is reduced in the platinum of 3.0 ~ 8.0 nm by partial size using local reduction way
Nano particle.
The removal effect of loaded platinum catalyst of the invention for benzene in VOCs is as follows:
By the platinum catalyst of preparation be used for benzene in VOCs removal, it can be achieved that catalyst load capacity be 0.75%, 400 DEG C of argon gas
When roasting, 1000 ppm benzene conversion ratios temperature required when reaching 90% is only 178oThe C(mL/g/h of SV=80,000 at this time).It is right
In the removal of benzene, Pt/Eggshell catalyst shows good catalytic activity.
Removal of the loaded platinum catalyst of the present invention for benzene in VOCs has the advantage that
(1) platinum catalyst preparation process of the present invention uses phyteral that platinum presoma is reduced to Pt nanoparticle for reducing agent, closes
It is environmentally protective at method；
(2) carrier used in platinum catalyst of the present invention is discarded egg shell, and cost is very cheap, not only does not generate any dirt
Dye, can also be achieved the recycling and reusing of rubbish；
(3) the platinum catalyst load capacity prepared by the present invention can be controlled in 0.1~2.0wt%, not for benzene concentration in VOCs
Together, different noble-metal-supported amounts can be accordingly prepared, is had a wide range of application；
(4) preparation method of the invention is simple, and reaction condition is mild, and material requested is at low cost, convenient sources.
Detailed description of the invention
Fig. 1 is the transmission electron microscope picture of the Pt/Eggshell of 0.75wt% in the present invention；
The Pt/Eggshell catalytic effect diagram that different temperatures roasts in air that Fig. 2 is 0.75wt% in the present invention；
Fig. 3 is that the Pt/Eggshell of 0.75wt% in the present invention is the catalytic effect diagram roasted in different atmosphere at 400 DEG C.
Specific embodiment
In order to further explain the technical solution of the present invention, below by way of specific embodiment combination attached drawing to of the invention
Technical solution is further explained and described.
The preparation of carrier egg shell powder needed for catalyst the following steps are included:
1) discarded egg shell is collected；
2) it after washing egg shell repeatedly with clear water, spontaneously dries at room temperature;
3) after grinding dry egg shell, by 20-100 mesh molecular sieve to obtain egg shell powder.
The preparation method of arbor-vitae extracting solution includes: to weigh arbor vitae leaf dried powder in conical flask, deionized water is added, by it
It is placed in 30 °C of water bath with thermostatic control shaking tables and vibrates 2 h, filter to take its filtrate and obtain arbor-vitae extracting solution.
Embodiment one
(1) 10 mL deionized waters are taken, the platinum acid chloride solution of 216 μ L, 35.1 mM and carrier (the 20-100 mesh of 0.212 g is added
Egg shell powder), stir 1 h in 90 DEG C of oil bath pans;
(2) the arbor-vitae extracting solution of 10 mL, 10 g/L is added into (1), continuation stirs 1 h in 90 DEG C of oil bath pans;
(3) by above-mentioned mixed liquor filtration washing, 12 h are dried at 50 DEG C;
(4) 400 DEG C of 4 h of roasting in air atmosphere obtain the Pt/Eggshell catalyst that load capacity is 0.75wt%.
Embodiment two
(1) 10 mL deionized waters are taken, the platinum acid chloride solution of 576 μ L, 35.1 mM and carrier (the 20-100 mesh of 0.212 g is added
Egg shell powder), stir 1 h in 90 DEG C of oil bath pans;
(2) the arbor-vitae extracting solution of 10 mL, 20 g/L is added into (1), continuation stirs 1 h in 90 DEG C of oil bath pans;
(3) by above-mentioned mixed liquor filtration washing, 12 h are dried at 50 DEG C;
(4) 400 DEG C of 4 h of roasting under an argon atmosphere obtain the Pt/Eggshell catalyst that load capacity is 2.0wt%.
Experiment one
Select the Pt/Eggshell catalyst of 0.75wt% for the removal of benzene (1000 ppm) in VOCs, when not roasting, benzene turns
Rate temperature required when reaching 90% is only 209oC。
Experiment two
Select the Pt/Eggshell catalyst of 2.0wt% for the removal of benzene (1000 ppm) in VOCs, when not roasting, benzene conversion
Rate temperature required when reaching 90% is only 159oC。
Experiment three
Removal of the Pt/Eggshell catalyst of selection 0.75wt% for benzene (1000 ppm) in VOCs, 400 oC air roasting
4h, benzene conversion ratio temperature required when reaching 90% is only 188oC。
Experiment four
Removal of the Pt/Eggshell catalyst of selection 0.75wt% for benzene (1000 ppm) in VOCs, 400 oC argon gas condition
Lower roasting 4h, benzene conversion ratio temperature required when reaching 90% is only 178oC。
Experiment five
Removal of the Pt/Eggshell catalyst of selection 2.0wt% for benzene (1000 ppm) in VOCs, 400 oC air roasting
4h, benzene conversion ratio temperature required when reaching 90% is only 136oC。
Experiment six
Removal of the Pt/Eggshell catalyst of selection 2.0wt% for benzene (1000 ppm) in VOCs, 400 oC argon gas condition
Lower roasting 4h, benzene conversion ratio temperature required when reaching 90% is only 131oC。
The foregoing is merely preferred embodiments of the invention, are not intended to restrict the invention, and the present invention can have various
Change, such as arbor-vitae plant extraction liquid can be changed into any water-soluble plant extracting solution；It is all the spirit and principles in the present invention it
Any modification, improvement etc., equivalent replacement made by interior；Needs are used as long as meeting, should be included in protection scope of the present invention
Within.
Claims (9)
1. a kind of preparation method of the Pt base catalyst for benzene catalysis oxidation, it is characterised in that: the following steps are included:
(1) 10~30 mL distilled water are taken, the platinum presoma of egg shell powder and 20~600 μ L that 0.1~0.5 g is added is molten
Liquid stirs 1~2 h under 50~100 °C；
(2) 10~30 mL phyteral extracting solutions are added obtained by the step (1) in mixed solution, stir 1 under 50~100 °C~
2 h；
(3) by above-mentioned material filtration washing, dry 5~12 h under 50~90 °C, then 400 under air or inert atmosphere
DEG C roasting 4 h to get load capacity be 0.1~2.0wt% Pt/Eggshell catalyst.
2. preparation method as described in claim 1, it is characterised in that: the preparation of carrier egg shell powder needed for catalyst includes
Following steps:
1) discarded egg shell is collected；
2) it after washing egg shell repeatedly with clear water, spontaneously dries at room temperature;
3) after grinding dry egg shell, by 20-100 mesh molecular sieve to obtain egg shell powder.
3. preparation method as described in claim 1, it is characterised in that: platinum precursor solution used in the step (1)
For platinum acid chloride solution.
4. preparation method as claimed in claim 3, it is characterised in that: the concentration of platinum acid chloride solution is 35.1 mM.
5. preparation method as described in claim 1, it is characterised in that: phyteral extracting solution described in the step (2) is
Arbor-vitae extracting solution.
6. preparation method as claimed in claim 5, it is characterised in that: the concentration of the arbor-vitae extracting solution is 2 ~ 20 g/L.
7. preparation method as claimed in claim 6, it is characterised in that: arbor-vitae extracting solution and the volume ratio of platinum precursor solution are
10~30:0.02~0.6。
8. preparation method as claimed in claim 5, it is characterised in that: the preparation method of arbor-vitae extracting solution includes: to weigh arbor-vitae
Leaf dry powder is added deionized water, places it in 30 °C of water bath with thermostatic control shaking tables and vibrate 2 h, filter to take its filter in conical flask
Liquid obtains arbor-vitae extracting solution.
9. preparation method as described in claim 1, it is characterised in that: will be adsorbed on eggshell in advance using local reduction way
Platinum presoma is reduced to Pt nanoparticle.
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| CN110000397A (en) * | 2019-04-19 | 2019-07-12 | 泉州师范学院 | A kind of copper nano material based on egg shell template and preparation method thereof, antibacterial applications |
| CN114029502A (en) * | 2021-11-12 | 2022-02-11 | 中国科学院合肥物质科学研究院 | Method for synthesizing nano platinum by using artemisia apiacea extract and application |
| CN114044756A (en) * | 2021-11-29 | 2022-02-15 | 八叶草健康产业研究院(厦门)有限公司 | Preparation method of mequindox |
| CN115722221A (en) * | 2021-08-26 | 2023-03-03 | 中国石油化工股份有限公司 | Catalytic oxidation catalyst and preparation method thereof |
| CN116036858A (en) * | 2023-01-31 | 2023-05-02 | 武汉龙龟环保科技有限公司 | Formaldehyde scavenger and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109847774A (en) * | 2019-03-16 | 2019-06-07 | 泉州师范学院 | It is a kind of for removing the preparation method and application of p-nitrophenol material |
| CN110000397A (en) * | 2019-04-19 | 2019-07-12 | 泉州师范学院 | A kind of copper nano material based on egg shell template and preparation method thereof, antibacterial applications |
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| CN116036858A (en) * | 2023-01-31 | 2023-05-02 | 武汉龙龟环保科技有限公司 | Formaldehyde scavenger and preparation method thereof |
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