CN107930576A - A kind of preparation method of fly ash micro-sphere porous material and obtained porous material - Google Patents
A kind of preparation method of fly ash micro-sphere porous material and obtained porous material Download PDFInfo
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- CN107930576A CN107930576A CN201711205406.3A CN201711205406A CN107930576A CN 107930576 A CN107930576 A CN 107930576A CN 201711205406 A CN201711205406 A CN 201711205406A CN 107930576 A CN107930576 A CN 107930576A
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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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
- B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
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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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
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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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4875—Sorbents characterised by the starting material used for their preparation the starting material being a waste, residue or of undefined composition
- B01J2220/4887—Residues, wastes, e.g. garbage, municipal or industrial sludges, compost, animal manure; fly-ashes
Abstract
Preparation method and obtained porous material the invention discloses a kind of fly ash micro-sphere porous material.The method is：It is raw material by the flyash fine ash obtained by sieving, drying, according to metal oxide mole in flyash, adjusts the different proportion of the concentrated sulfuric acid and metal oxide, configure concentrated sulfuric acid coal ash mixed material；The concentrated sulfuric acid coal ash mixed material of different formulations is roasted under certain conditions, obtains clinker；By roasting clinker by soluble salt dissolution therein under certain water bath condition, separation of solid and liquid, obtains the fly ash micro-sphere porous material with pore structure of different metal oxides and siliceous ratio.The present invention has that technique is simple, production cost is low, the characteristics of being easy to separation of solid and liquid, while the pore structure of prepared bead material can regulate and control, the organic dyestuff suitable for absorption waste water, the comprehensive utilization of solid waste is realized, has been achieveed the purpose that " treatment of wastes with processes of wastes against one another ".
Description
Technical field
It is more particularly to a kind of to be prepared not using fly ash micro-sphere the present invention relates to a kind of preparation field of porous adsorbing material
With the method for the porous adsorbing material of pore structure.
Background technology
Coal-powder boiler is one of the most commonly used type of furnace in current coal-burning power plant, and coal-powder boiler flyash is also the fine coal of yield maximum
Grey type.The chemical composition of coal-powder boiler flyash is SiO2、Al2O3With other metal oxides, crystal thing is mainly mutually mullite
And corundum.The microscopic appearance of flyash is observed by SEM, it can be found that often there are the powder of larger proportion in coal-powder boiler flyash
Fly ash micro-bead.This ignition temperature being mostly derived from Pulverized Fuel Boiler Furnace is higher (1200-1700 DEG C) so that the part nothing in coal dust
Machine mineral melt at high temperature, in the droplet cooling procedure of molten state under surface tension effects, finally formed ball
Shape solid particle is fly ash micro-sphere.These microballons mainly include following type：Floating bead, heavy pearl (hollow and solid),
Magnetic bead etc..Metal oxide in microballon can be with soluble salt dissolution, in the situation that microballon form is constant in the case where acid acts on
Lower generation large number of orifices, and adjust metal oxide dissolution ratio, you can obtain the porous beads of different pore size and unit weight.Due to powder
Fly ash micro-bead has the characteristics that strong excellent adsorption, wearability, good corrosion resistance, dispersed good fluidity, is widely used in environmental protection
The fields such as water purification, rubber filling, lightweight concrete, refractory material.
While dye industry brings colourful life and offer clothing, food, lodging and transportion -- basic necessities of life to the mankind, dyeing waste water is unreasonable
Discharge constitutes serious threat to environment and human health.At present, common wastewater processing technology can substantially divide both at home and abroad
For three major types：Chemical method (flocculation sediment, chemical oxidization method, electrochemical process), bioanalysis (aerobic method, anaerobic process, aerobic-anaerobic connection
It is legal) and Physical (membrane separation process, active carbon adsorption).Wherein Handling Waste Water by Absorbing Way have it is efficient, easy to operate, into
This low advantage, therefore be widely used.Being usually used in the adsorbent of wastewater treatment includes activated carbon, zeolite, ion exchange
Resin, nano-metal-oxide and compound sorbing material etc..Although these adsorbents have been widely used, they
The cost is relatively high.Thus search out adsorbent that is a kind of cheap and being readily available make a return journey water removal in pollutant become
Instantly the emphasis studied.
CN105582894A is disclosed《Flyash synthesizes the preparation method of NaX type molecular sieve sorbing materials》.This method profit
It is primary raw material with flyash, is melted by sodium hydroxide, hydrothermal crystallizing, esterification reaction tech prepare the absorption of NaX types molecular sieve
Material.Although flyash is prepared into zeolite can improve the specific surface area of flyash, strengthen its adsorptivity；But this method work
Skill process is complicated, while water-heat process reaction temperature is high, energy consumption is big, is unfavorable for industrialized production.CN103769045A is disclosed
《A kind of preparation method of fly ash base sorbing material》.The material will not only melt by high-temperature alkali, but also in addition structure directing
The pH of control solution is also needed while agent, it is desirable to it is more harsh, limit application.J.X.Lin, S.L.Zhan et al. exist
《Adsorption of basicdye from aqueous solution onto fly ash》In one text, flyash is utilized
Microballon is raw material, in dilute H2SO4Acidleach 24h in solution, then adsorbs methylene blue.This method is although of low cost, behaviour
Make simply, but modified fly ash micro-sphere structural change unobvious, specific surface area slightly increase, adsorption capacity is relatively low.
For the above method there are the problem of, the present invention according to metal oxide in flyash mole, pass through adjusting
The different proportion of the concentrated sulfuric acid and metal oxide, the flyash for obtaining the nano aperture of different metal oxides and siliceous ratio are micro-
Pearl porous material.The porous beads have high mobility, stable chemical performance, big specific surface area, adjustable aperture, suction
Attached property is strong, processing cost is low, heat safe feature, can be applied to wastewater treatment side as an organic molecular species sorbing material
Face.
The content of the invention
The present invention is intended to provide a kind of method that fly ash micro-sphere prepares porous adsorbing material.This method has technique letter
Singly, the characteristics of production process is controllable, production cost is low, makes full use of fly ash micro-sphere fine particles, polymolecularity and mobility
The characteristics of, prepare the sorbing material of adjustable aperture and larger specific surface area.
The present invention is achieved by the following technical solutions：
A kind of preparation method of fly ash micro-sphere porous material, comprises the following steps：
(1) it is raw material by the flyash fine ash obtained by sieving, drying, according to mole of metal oxide in flyash
Amount, adjusts the different proportion of the concentrated sulfuric acid and metal oxide, configures concentrated sulfuric acid coal ash mixed material；
(2) concentrated sulfuric acid mixture of flyash and different proportion is placed in ceramic crucible, in certain in Muffle furnace
The roasting temperature regular hour；
(3) by the roasting clinker of acquisition using the method for water-bath by soluble salt dissolution therein, separation of solid and liquid, obtains difference
The fly ash micro-sphere porous material with pore structure of metal oxide and siliceous ratio.
Drying temperature described in step (1) is 100 DEG C -120 DEG C, drying time 24h, dry until containing in flyash
Water rate is less than 1%, and the granularity of flyash fine ash is D90=20.801 μm.
The molar ratio of the concentrated sulfuric acid and metal oxide described in step (1) is 0.2-1.6.
Calcination temperature described in step (2) is 160 DEG C -260 DEG C, roasting time 30min-120min.
Bath temperature described in step (3) is 45 DEG C -80 DEG C, water bath time 0.5h-1.0h.
Fly ash micro-sphere porous material is prepared using the preparation method of above-mentioned fly ash micro-sphere porous material.
Beneficial effect of the present invention is：
1st, the present invention prepares fly ash micro-sphere porous material using sulfuric acid roasting method, will according to the difference to pore volume, aperture
Ask, by the control to sour gray scale, calcination temperature and roasting time, so as to reach flyash porous beads material pore volume and aperture
Controllable purpose；
2nd, the characteristics of taking full advantage of fly ash micro-sphere fine particles, polymolecularity and mobility, promotes the progress of absorption；
3rd, prepared fly ash micro-sphere porous material specific surface area is larger, and pore structure is more flourishing, has to organic molecule
There is higher adsorption bleaching activity.
Brief description of the drawings
Fig. 1 is scanning electron microscope (SEM) photo of flyash porous beads prepared by embodiment 1；
Fig. 2 is the N of flyash porous beads prepared by embodiment 12Adsorption-desorption isothermal；
Fig. 3 is the pore size distribution curve of flyash porous beads prepared by embodiment 1；
Fig. 4 is influence curve of the change to adsorption effect of porous material inventory；
Fig. 5 is influence curve of the methylene blue to adsorption effect of various concentrations；
Fig. 6 is influence curve of the different adsorption times to adsorption effect.
Embodiment
The present invention is described in further detail with reference to embodiment：
The preparing raw material of flyash porous adsorbing material is Inner Mongol power plant output, its chemical composition is as shown in table 1.
Table 1 is coal-powder boiler flyash chemical composition (wt./%)
With reference to specific implementation example, the present invention will be further described：
Embodiment 1
Using above-mentioned coal-powder boiler flyash (such as table 1), fly ash micro-sphere porous material is prepared by sulfuric acid roasting method.By coal
Powder stove flyash obtains flyash fine ash by sieving, drying；By the molar ratio of metal oxide in the concentrated sulfuric acid and flyash
1.2 dispensings are placed in ceramic crucible, are then placed in Muffle furnace and are reacted 120min at 260 DEG C；Clinker after roasting is existed
Dissolution 1h, separation of solid and liquid under 80 DEG C of water bath condition, obtain fly ash micro-sphere porous material 1.From fig. 1, it can be seen that flyash is porous
The isothermal adsorption desorption curve of microballon is typical IV types, has obvious hysteresis loop, illustrates that fly ash micro-sphere porous material has
Meso-hole structure.The specific surface area of gained porous adsorbing material is 26.803m2/ g, average pore size 10.46nm.
The fly ash micro-sphere porous material 1 for weighing different quality (0.1g-0.8g) respectively is placed in conical flask, measures 50mL
Concentration is the methylene blue solution of 20mg/L, and pH is (5.3 ± 0.1), and temperature control is placed in oscillator in (20 ± 2) DEG C or so
On, after hunting speed 170rpm, 8h to be adsorbed, the more microballon porous material dosages of flyash are tested using ultraviolet specrophotometer
Influence to methylene blue adsorption number effect.Fig. 2 the result shows that：With the increase of fly ash micro-sphere porous material dosage, adsorbance
Gradually increase.The percent of decolourization (%) of sorbing material 1 is：42.72、66.97、77.30、84.02、88.69、91.64、95.13、
96.64、97.27、98.02、98.69。
Embodiment 2
Using above-mentioned coal-powder boiler flyash (such as table 1), fly ash micro-sphere porous material is prepared by sulfuric acid roasting method.By coal
Powder stove flyash obtains flyash fine ash by sieving, drying；By the molar ratio of metal oxide in the concentrated sulfuric acid and flyash
0.8 dispensing is placed in ceramic crucible, is then placed in Muffle furnace and is reacted 120min at 200 DEG C；Clinker after roasting is existed
Dissolution 1h, separation of solid and liquid under 80 DEG C of water bath condition, obtain fly ash micro-sphere porous material 2.The ratio of gained porous adsorbing material
Surface area is 15.513m2/ g, average pore size 5.40nm.
The fly ash micro-sphere porous material 2 for weighing different quality (0.1g-0.8g) respectively is placed in conical flask, measures 50mL
Concentration is the methylene blue solution of 20mg/L, and pH is (5.3 ± 0.1), and temperature control is placed in oscillator in (20 ± 2) DEG C or so
On, after hunting speed 170rpm, 8h to be adsorbed, fly ash micro-sphere porous material dosage pair is tested using ultraviolet specrophotometer
The influence of methylene blue adsorption number effect.The percent of decolourization (%) of sorbing material 2 is：22.52、35.97、55.50、64.02、75.69、
80.64、82.25、83.56、85.37、86.10、86.45。
Embodiment 3
Using above-mentioned coal-powder boiler flyash (such as table 1), fly ash micro-sphere porous material is prepared by sulfuric acid roasting method.By coal
Powder stove flyash obtains flyash fine ash by sieving, drying；By the molar ratio of metal oxide in the concentrated sulfuric acid and flyash
0.2 dispensing is placed in ceramic crucible, is then placed in Muffle furnace and is reacted 120min at 160 DEG C；Clinker after roasting is existed
Dissolution 1h, separation of solid and liquid under 80 DEG C of water bath condition, obtain fly ash micro-sphere porous material 3.The ratio of gained porous adsorbing material
Surface area is 4.895m2/ g, average pore size 3.80nm.
The fly ash micro-sphere porous material 3 for weighing different quality (0.1g-0.8g) respectively is placed in conical flask, measures 50mL
Concentration is the methylene blue solution of 20mg/L, and pH is (5.3 ± 0.1), and temperature control is placed in oscillator in (20 ± 2) DEG C or so
On, after hunting speed 170rpm, 8h to be adsorbed, fly ash micro-sphere porous material dosage pair is tested using ultraviolet specrophotometer
The influence of methylene blue adsorption number effect.The percent of decolourization (%) of sorbing material 3 is：10.34、25.60、35.83、38.78、43.68、
45.64、47.96、50.41、51.80、52.01、52.8。
Claims (6)
1. a kind of preparation method of fly ash micro-sphere porous material, gained porous material can be made by following steps：
(1) will be raw material by sieving, the obtained flyash fine ash of drying, according to the mole of metal oxide in flyash,
The different proportion of the concentrated sulfuric acid and metal oxide is adjusted, configures concentrated sulfuric acid coal ash mixed material；
(2) concentrated sulfuric acid mixture of flyash and different proportion is placed in ceramic crucible, in certain temperature in Muffle furnace
The lower roasting regular hour；
(3) by the roasting clinker of acquisition using the method for water-bath by soluble salt dissolution therein, separation of solid and liquid, obtains different metal
The fly ash micro-sphere porous material with pore structure of oxide and siliceous ratio.
2. the preparation method of fly ash micro-sphere porous material according to claim 1, it is characterised in that：Described in step (1)
Drying temperature be 100 DEG C -120 DEG C, drying time 24h, the drying until flyash in moisture content be less than 1%, it is described
The granularity of flyash fine ash is D90=20.801 μm.
3. the preparation method of fly ash micro-sphere porous material according to claim 1, it is characterised in that：Described in step (1)
The concentrated sulfuric acid and the molar ratio of metal oxide be 0.2-1.6.
4. the preparation method of fly ash micro-sphere porous material according to claim 1, it is characterised in that：Described in step (2)
Calcination temperature be 160 DEG C -260 DEG C, the roasting time is 30min-120min.
5. the preparation method of fly ash micro-sphere porous material according to claim 1, it is characterised in that：Described in step (3)
Bath temperature be 45 DEG C -80 DEG C, water bath time 0.5h-1.0h.
A kind of 6. fly ash micro-sphere porous material, it is characterised in that：Using any one of the claim 1-5 preparation method systems
.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108815548A (en) * | 2018-07-05 | 2018-11-16 | 吉林大学 | A kind of preparation method of flyash porous beads eliminating smell agent |
| CN113562993A (en) * | 2021-07-22 | 2021-10-29 | 天津工业大学 | Method for preparing aluminate water treatment agent from fly ash by using sodium bicarbonate and carbide slag |
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| CN103861556A (en) * | 2012-12-18 | 2014-06-18 | 同济大学 | Mesoporous material preparation method using fly ash |
| CN104787788A (en) * | 2015-01-15 | 2015-07-22 | 北京矿冶研究总院 | Method for producing alumina from high-alumina fly ash |
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2017
- 2017-11-27 CN CN201711205406.3A patent/CN107930576B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103861556A (en) * | 2012-12-18 | 2014-06-18 | 同济大学 | Mesoporous material preparation method using fly ash |
| CN104787788A (en) * | 2015-01-15 | 2015-07-22 | 北京矿冶研究总院 | Method for producing alumina from high-alumina fly ash |
Non-Patent Citations (1)
| Title |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108815548A (en) * | 2018-07-05 | 2018-11-16 | 吉林大学 | A kind of preparation method of flyash porous beads eliminating smell agent |
| CN108815548B (en) * | 2018-07-05 | 2020-05-05 | 吉林大学 | Preparation method of fly ash porous microbead deodorant |
| CN113562993A (en) * | 2021-07-22 | 2021-10-29 | 天津工业大学 | Method for preparing aluminate water treatment agent from fly ash by using sodium bicarbonate and carbide slag |
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