CN110339815A - A kind of preparation method of high adsorption flue gas demercuration adsorbent material - Google Patents
A kind of preparation method of high adsorption flue gas demercuration adsorbent material Download PDFInfo
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- CN110339815A CN110339815A CN201910539879.XA CN201910539879A CN110339815A CN 110339815 A CN110339815 A CN 110339815A CN 201910539879 A CN201910539879 A CN 201910539879A CN 110339815 A CN110339815 A CN 110339815A
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- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
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- 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
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
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- B01D2257/602—Mercury or mercury compounds
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Abstract
The present invention relates to a kind of preparation methods of high adsorption flue gas demercuration adsorbent material, belong to technical field of absorbent.Technical solution of the present invention is within the scope of suitable modification time, plasma can produce sufficient corrasion to bamboo charcoal surfaces externally and internally, bamboo charcoal surfaces externally and internally is set to generate new fluctuating, it is coarse, form many hollows, increase specific surface area, plasma can react with the specific point of bamboo charcoal surfaces externally and internally, largely generate new oxygen-containing group, these oxygen-containing groups can be substantially reduced the pore size of the position in the accumulation of pore interior, corrasion and group nucleus formation can cooperate with the pore structure for promoting bamboo charcoal, the quantity of bamboo charcoal Surface oxygen-containing groups can also be improved simultaneously, since the parameters such as the specific surface area of Carbon Materials and pore volume are to determine the key factor of absorption property, therefore, it improves significantly and improves above two aspect through the modified bamboo charcoal of oxygen plasma, can have better absorption property, improve material Demercuration efficiency.
Description
Technical field
The present invention relates to a kind of preparation methods of high adsorption flue gas demercuration adsorbent material, belong to adsorber technologies neck
Domain.
Background technique
The effective use of the energy greatly improves people's lives quality, up to the present, world energy sources still mainly according to
Rely
Fossil fuel, and coal, petroleum, natural gas etc. will be world's main energy sources.Coal resources in China reserves compared with horn of plenty,
Coal occupies absoluteness status in using energy source.BP world energy outlook predicts world energy sources, Chinese primary
It is indicated in the prospect of energy accounting, China follows world trends also to low-carbon energy constructional transfer, and future will be sent out for 20 years energetically
The non-fossil energy is opened up, still, coal is still that China's energy mainly utilizes form.Silvery white is presented in mercury (Hg) at normal temperature, is one
Kind liquid heavy metal, mercury and mercuric compounds all have biological hypertoxicity, can destroy brain tissue, the nervous system of human body, especially
It is organic methyl mercury, once it is difficult to be discharged by human body sucking.Last century mid-term, " minamata disease " that the city Japanese water Yu occurs are exactly
The mercury poisoning event as caused by industrial mercury emissions.The circulation of mercury in an atmosphere, it is dirty from coal-burning power plant, chlorine industry, life
The mercury in the sources such as water, waste incineration is released in atmosphere, then the effects of being spread, being settled enters soil and water body, by water
Organic mercury is converted by inorganic mercury form after biology is edible, accumulates and is transmitted along food chain in vivo, is in
More upper layer, the mercury of accumulation of food chain are more.In addition, mercury also has global, mercury can be migrated in biosphere, from one
The problem of country migrates to another country, and therefore, mercury pollution causes the concern in the whole world, becomes the entire ecosystem.As before
Described, mercury has hypertoxicity, cumulative bad and migration, very big concern of the discharge of mercury by countries in the world, the control of mercury pollution
As urgent problem to be solved.
In coal the occurrence status of mercury to mercury coal combustion process migrate and distribution has a certain impact.Result of study table
It is bright,
Since mercury thiophilicity is very strong, the mercury in coal is mostly present in pyrite and cinnabar, i.e., exists in the form of mercuric sulphide,
In addition there are also other forms such as mercury metals and organomercurial compound.Degree of coalification is higher, and its mercury content is more, lignite mercury content
It is usually less.Mercury in China's coal has the characteristics that be unevenly distributed, and content of the mercury in coal also can with the place of production and difference.
The existence form of Mercury In Coal Combustion Flue Gas, because of the conditions such as the temperature of various process difference, leads to mercury in practical coal-burning power plant
Exist in different forms.Since Hg0 is the most stable at high temperature, in 1500 DEG C of coal-burning boilers, the principal mode of mercury is
HgO；Flue gas will pass through temperature-fall period after coming out from boiler, and element mercury can be oxidized to high price at this time, and contain Cl member in coal
Element, HgCl2Just become the Main Morphology of mercury, usually, Hg2+65% is accounted about, other 35% or so be still element mercury, and there are also few
The particle mercury of amount exists.Meanwhile the type of coal is different, different mercury shape accountings slightly have difference, the flue gas that lignite burning generates
In, HgO is wherein main chemical form.It can be obtained by analyzing above, there are mainly three types of existence form, norivalent elements for mercury in flue gas
State mercury, divalent oxidation state mercury and particle mercury.Mercury species have different property, and wherein Elemental Mercury chemical property is not lived
It sprinkles, it is not soluble in water, it is readily volatilized, it is the form that removal is most difficult in gas mercury.Oxidation state mercury good water solubility, relatively good removal.?
Grain state mercury is by the mercury of the absorption such as flying dust, is HgO and Hg2+Mixture, the residence time is shorter in flue gas.
Demercuration performance in addition to directly enhancing desulfurizing agent and denitrfying agent, all kinds of demercuration materials are also widely studied, main to wrap
It includes: carbon-supported catalyst, flying dust, Ca-base adsorbent, mineral adsorbent and other type of adsorbent.
Carbon-supported catalyst carbon based material has specific surface area abundant, therefore has preferable demercuration performance.Active carbon is inhaled
Attached dose of application is universal, has been used for the mercury generated in absorption waste incinerator.With activated carbon adsorption Mercury In Coal Combustion Flue Gas in foreign countries
It is applied.Active carbon spraying technique is demercuration technology more mature at present, main using in ESP or FF injected upstream active carbon
(AC) powder, the active carbon for having adsorbed mercury are captured with flying dust by cleaner, realize the cooperation-removal of mercury.Active carbon demercuration machine
Reason has diversity, including physical absorption and chemisorption, and generally speaking, physical absorption only accounts for very small part, and HgO is aoxidized
For Hg2+Chemisorption play the decisive role of mercury removal.Active carbon demercuration rate is related with several factors, it is generally accepted that
The acid centre of activated carbon surface is the key that mercury trapping: under state of atom, mercury has the tendency that being oxidized that (mercury is electronics to inhaling
Attached dose of surface or another gas molecule in space), therefore, mercury can have an effect with the acid centre of carbon surface rapidly.Active
Charcoal is small to the adsorption capacity of mercury, and adsorption time is short, therefore demercuration effect is poor.To reduce cost, while adsorption efficiency is improved, ground
The person of studying carefully studies the material in cheap charcoal source, such as coconut husk, bamboo, rice husk, mulberry tree branch, biological coke as production active carbon
Raw material.
Flying dust is the product in coal combustion flue gas, cheap compared with active carbon, therefore its demercuration performance is by many scholars
Research.Flying dust is made of inorganic constituents and organic principle, inorganic constituents include non-magnetic alumino-silicate, silicate, calcium oxide,
Sulfate, magnetic bloodstone, magnetic iron ore etc., the oxide of iron are main components, and inorganic constituents accounts for 98%, but to winged
The research of inorganic compound Adsorption of Mercury is not very sufficiently in ash.Organic principle is mainly unburnt carbon, and numerous studies elaborate
Mechanism of the unburnt carbon in mercury adsorption process in flying dust.Flying dust can be combined by physical absorption, chemisorption and the two
Mode absorbed portion gaseous mercury, some researches show that the inorganic matters in flying dust can be with catalysis oxidation elemental mercury.Flying dust is to mercury
Absorption is mainly by particle size of fly ash, unburnt carbon content and specific surface area, flue-gas temperature, smoke components and flying dust inorganic constituents
Etc. factors influence.To improve mercury removal rate, some scholars are in a fluidized bed reactor modified flying dust.
With the improvement of people's life quality, the requirement to air quality also constantly rises, ring brought by industrial production
Border problem is obtained more and more concerns.Active carbon has large specific surface area, features such as pore structure prosperity, and current flue gas
For the desulfurizing agent of desulfurization still based on lime/lime stone, absorption property is bad, and therefore, it is necessary to develop efficient, inexpensive demercuration suction
Attached dose.
Summary of the invention
The technical problems to be solved by the invention: for active carbon have large specific surface area, the features such as pore structure prosperity,
And at present flue gas desulfurization desulfurizing agent still based on lime/lime stone, the bad problem of absorption property provides a kind of high absorption
The preparation method of property flue gas demercuration adsorbent material.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
(1) it takes bamboo wood and cutting and grinding, clean rear naturally dry is placed in pre-preg liquid, stand collection dipping bamboo chip and be placed in
In filter press, filters pressing handle filters pressing bamboo chip is placed in steam blasting equipment, Steam explosion treatment, to steam blasting complete
Afterwards, it is centrifugated, collects lower sediment and washs, dries to obtain pretreatment bamboo fibre；
(2) according to parts by weight, 45~50 parts of sodium-acetate buffers, 10~15 parts of pretreatment bamboo fibres and 25~30 are weighed respectively
Part deionized water mixes matrix liquid and cellulase to be added in matrix liquid, is stirred and hydrolysis process h, at standing
It manages and filters, collect filter cake and vacuum freeze drying, enzymatic hydrolysis bamboo fibre particle must be dried；Dry enzymatic hydrolysis bamboo fibre particle is collected to set
In Muffle furnace, heating heats and keeps the temperature charing after heat-insulation preheating, collects to obtain charing particle；
(3) according to parts by weight, -6,3~5 parts of 45~50 parts of deionized waters, 15~20 parts of 18- crown ethers meta-aluminic acids are weighed respectively
Sodium, 3~5 parts of silica solution are placed in three-necked flask, are stirred, are obtained mixed sols, then according to parts by weight, respectively weigh 45~
50 parts of mixed sols, 10~15 parts of 10% Klorvess Liquids of mass fraction, 10% silver nitrate solution of mass fraction and 10~15 parts
Charing particle is placed in mortar, and grinding distribution simultaneously collects dispersion slurries, collects dispersion slurries and 1:1 in mass ratio, by its with go
Ionized water mixing and Crystallizing treatment, are centrifugated and collect lower sediment, wash drying, are prepared into coating modification charing particle；
(4) coating modification charing particle and heat preservation and dryness are collected, dehydration coating modification charing particle is collected and is placed in quartz reaction
It in device, is stood after blowing air and plasma treatment, the high adsorption flue gas demercuration adsorbent material can be prepared into.
The filters pressing processing is 35~38% for compacting extremely impregnates bamboo chip moisture content at 25~30 DEG C, 6~8MPa.
The Steam explosion treatment is 3~5min of Steam explosion treatment in the case where pressure is 1.25~1.5MPa.
The sodium-acetate buffer is that pH is 4.8 sodium-acetate buffers.
The cellulase additive amount is 50U/g.
Heating, which heats and keeps the temperature charcoal, after the heat-insulation preheating turns to 10~15min of heat-insulation preheating at 100~150 DEG C
Afterwards, then 5 DEG C/min is pressed, is warming up to 850~900 DEG C, 2~3h of heat preservation charing.
The Crystallizing treatment is in 100~110 DEG C of reaction kettles and 100~120h of steam crystallization.
It is 45~50mL/min that the air, which is passed through rate,.
Plasma treatment is open plasma power supply and to control output power be 30W, plasma treatment 15min.
The pre-preg liquid preparation step is according to parts by weight, to weigh 45~50 parts of deionized waters, 10~15 respectively
Part 15 sodium hydroxide solution of mass fraction and 6~8 parts of 8% sodium sulfite solutions of mass fraction, are stirred.
The present invention is compared with other methods, and advantageous effects are:
(1) technical solution of the present invention uses bamboo chip for raw material, carries out in advance by low-pressure steam explosion, then with alkaline sulfite
Processing pre-processes alkaline sulfite pretreatment coupling to low-pressure steam explosion to form step pretreatment, can simplify technique stream
Journey reduces pretreatment cost, improves cellulose conversion ratio, has mainly dissolved out part by the pretreated cizu of low-pressure steam explosion
Hemicellulose, the increase of the dissolution of hemicellulose, the loose of structure and cellulose specific surface area can promote subsequent de- wood
Element and enzymolysis process have excellent structural behaviour by the material after enzymolysis processing, the composite wood for forming its charing
Material has excellent pore structure and duct performance, its absorption absorption property and specific surface area tool is made to be significantly improved；
(2) in the technical solution of the present invention, cladding molecular screen material is carried out to charcoal material surface, due to cladding to Carbon Materials hole
On inside, due to coating modification of the optimum porosity that has of Carbon Materials by gel rubber material after cladding, Carbon Materials are improved
Hole intensity, is adsorbed by molecular sieve, and since molecular sieve is spongy meso-hole structure, having to run through has meso-hole structure, and
Spherical particle with the structure is throughout entire sample, since the duct of molecular sieve is smaller, have due to catalytic activity deposit
In dimensional effect, the lesser particle-catalytic activity of general size is good, thus the molecular sieve of porous load is effectively catalyzed and adsorbs, and changes
The absorption property and intensity of load of kind material；
(3) within the scope of suitable modification time, plasma can produce bamboo charcoal surfaces externally and internally to be filled technical solution of the present invention
Point corrasion, so that bamboo charcoal surfaces externally and internally is generated new fluctuating, coarse, form many hollows, increase specific surface area, at the same
Within the scope of suitable modification time, plasma can react with the specific point of bamboo charcoal surfaces externally and internally, a large amount of to generate newly
Oxygen-containing group, these oxygen-containing groups can be substantially reduced the pore size of the position in the accumulation of pore interior, compare table for bamboo charcoal
The increase of area has positive effect, corrasion and base
Group's nucleus formation can cooperate with the pore structure for promoting bamboo charcoal, increase specific surface area, the total hole volume, micropore volume of bamboo charcoal
And micro pore surface area, while the quantity of bamboo charcoal Surface oxygen-containing groups can also be improved, due to the specific surface area and Kong Rong of Carbon Materials
The parameters such as product are to determine the key factor of absorption property, and the type and quantity of charcoal material surface oxygen-containing group are equally in absorption ring
Highly important effect has been played during organic matter and heavy metal in the medium of border.Therefore, modified through oxygen plasma
Bamboo charcoal it is above two aspect improve significantly and improve, can have better absorption property, improve the demercuration of material
Efficiency.
Specific embodiment
It takes bamboo wood and cutting and grinding is to the bamboo chip having a size of 10mm × 1mm specification, naturally dry is placed in after being cleaned
In pre-preg liquid, after standing 10~12h, collects dipping bamboo chip and be placed in filter press, suppressed at 25~30 DEG C, 6~8MPa
To dipping bamboo chip moisture content be 35~38%, obtain filters pressing bamboo chip and be placed in steam blasting equipment, pressure be 1.25~
3~5min of Steam explosion treatment under 1.5MPa is centrifugated 10 after the completion of steam blasting, then at 2500~5000r/min
~15min, collect lower sediment and is rinsed with deionized water and wash to filter press extrusion liquid pH be in neutrality after, it is dry in advance
Handle bamboo fibre；According to parts by weight, weighing 45~50 parts of pH respectively is 4.8 sodium-acetate buffers, 10~15 parts of pretreatment bamboos
Fiber and 25~30 parts of deionized waters mix to obtain matrix liquid and by 50U/g, cellulase are added in matrix liquid, and stirring is mixed
Merging is placed in 70~78h of hydrolysis process at 50~55 DEG C, and stewing process simultaneously filters, and collects filter cake and vacuum freeze drying, obtains dry
Dry enzymatic hydrolysis bamboo fibre particle；It collects dry enzymatic hydrolysis bamboo fibre particle to be placed in Muffle furnace, the heat-insulation preheating 10 at 100~150 DEG C
After~15min, then 5 DEG C/min is pressed, be warming up to 850~900 DEG C, after heat preservation carbonizes 2~3h, collects to obtain charing particle；By weight
Number meter weighs 45~50 parts of deionized waters, -6,3~5 parts of sodium metaaluminates of 15~20 parts of 18- crown ethers, 3~5 parts of silica solution respectively
It is placed in three-necked flask, is stirred 1~2h, obtain mixed sols, then according to parts by weight, it is molten to weigh 45~50 parts of mixing respectively
Glue, 10~15 parts of 10% Klorvess Liquids of mass fraction, 10% silver nitrate solution of mass fraction and 10~15 parts of charing particles are set
In mortar, grinding distribution simultaneously collects dispersion slurries, collects dispersion slurries and 1:1 in mass ratio, it is mixed with deionized water
It is placed in 100~110 DEG C of reaction kettles and 100~120h of steam crystallization, is centrifugated and collects lower sediment, use deionized water
After flushing is in neutrality to cleaning solution, dry 6~8h at 55~60 DEG C is prepared into coating modification charing particle；Cladding is collected to change
Property charing particle be placed in 10~12h of heat preservation and dryness at 55~60 DEG C, collect dehydration coating modification charing particle and be placed in quartz
In reactor, it is 45~50mL/min that air is passed through into reactor and controls air to be passed through rate, after being passed through 3~5min,
Open plasma power supply simultaneously controls output power as 30W, after plasma treatment 15min, stands 3~5h, can be prepared into institute
The high adsorption flue gas demercuration adsorbent material stated；The pre-preg liquid preparation step is according to parts by weight, to weigh respectively
45~50 parts of deionized waters, 10~15 parts of 15 sodium hydroxide solutions of mass fraction and 6~8 parts of 8% sodium sulfites of mass fraction are molten
Liquid is stirred.
Embodiment 1
It takes bamboo wood and cutting and grinding is to the bamboo chip having a size of 10mm × 1mm specification, naturally dry is placed in preimpregnation after being cleaned
In stain liquid, after standing 10h, collects dipping bamboo chip and be placed in filter press, the compacting extremely dipping bamboo chip moisture content at 25 DEG C, 6MPa
It is 35%, obtains filters pressing bamboo chip and be placed in steam blasting equipment, the Steam explosion treatment 3min in the case where pressure is 1.25MPa, wait steam
After the completion of steam explosion is broken, then it is centrifugated 10min at 2500r/min, collects lower sediment and is rinsed and washed with deionized water
It is so dry that pre-process bamboo fibre after being in neutrality to filter press extrusion liquid pH；According to parts by weight, weighing 45 parts of pH respectively is
4.8 sodium-acetate buffers, 10 parts of pretreatment bamboo fibres and 25 parts of deionized waters mix to obtain matrix liquid and by 50U/g, by cellulose
Enzyme is added in matrix liquid, is stirred and is placed in hydrolysis process 70h at 50 DEG C, and stewing process simultaneously filters, and collection filter cake is simultaneously true
Vacuum freecing-dry must dry enzymatic hydrolysis bamboo fibre particle；It collects dry enzymatic hydrolysis bamboo fibre particle to be placed in Muffle furnace, at 100 DEG C
After heat-insulation preheating 10min, then 5 DEG C/min is pressed, be warming up to 850 DEG C, after heat preservation carbonizes 2h, collects to obtain charing particle；By weight
Number meter weighs 45 parts of deionized waters, -6,3 parts of sodium metaaluminates of 15 parts of 18- crown ethers, 3 parts of silica solution respectively and is placed in three-necked flask,
It is stirred 1h, obtains mixed sols, then according to parts by weight, weighs 45 parts of mixed sols, 10 parts of 10% chlorine of mass fraction respectively
Change potassium solution, 10% silver nitrate solution of mass fraction and 10 parts of charing particles to be placed in mortar, grinding distribution simultaneously collects dispersion pulp
Liquid collects dispersion slurries and 1:1 in mass ratio, it is mixed with deionized water and is placed in 100 DEG C of reaction kettles and steam crystallization
100h is centrifugated and collects lower sediment, is rinsed with deionized water to cleaning solution after being in neutrality, dry 6h, system at 55 DEG C
It is standby that coating modification carbonizes particle；It collects coating modification charing particle and is placed in heat preservation and dryness 10h at 55 DEG C, collect dehydration cladding
Modified charing particle is placed in quartz reactor, and it is 45mL/ that air is passed through into reactor and controls air to be passed through rate
Min, after being passed through 3min, open plasma power supply simultaneously controls output power as 30W, after plasma treatment 15min, stands
3h can be prepared into the high adsorption flue gas demercuration adsorbent material；The pre-preg liquid preparation step is, by weight
Number meter weighs 45 parts of deionized waters, 10 parts of 15 sodium hydroxide solutions of mass fraction and 6 parts of 8% sulfurous acid of mass fraction respectively
Sodium solution is stirred.
Embodiment 2
It takes bamboo wood and cutting and grinding is to the bamboo chip having a size of 10mm × 1mm specification, naturally dry is placed in preimpregnation after being cleaned
In stain liquid, after standing 11h, collects dipping bamboo chip and be placed in filter press, the compacting extremely dipping bamboo chip moisture content at 27 DEG C, 7MPa
It is 37%, obtains filters pressing bamboo chip and be placed in steam blasting equipment, the Steam explosion treatment 4min in the case where pressure is 1.37MPa, wait steam
After the completion of steam explosion is broken, then it is centrifugated 13min at 3700r/min, collects lower sediment and is rinsed and washed with deionized water
It is so dry that pre-process bamboo fibre after being in neutrality to filter press extrusion liquid pH；According to parts by weight, weighing 47 parts of pH respectively is
4.8 sodium-acetate buffers, 13 parts of pretreatment bamboo fibres and 27 parts of deionized waters mix to obtain matrix liquid and by 50U/g, by cellulose
Enzyme is added in matrix liquid, is stirred and is placed in hydrolysis process 74h at 53 DEG C, and stewing process simultaneously filters, and collection filter cake is simultaneously true
Vacuum freecing-dry must dry enzymatic hydrolysis bamboo fibre particle；It collects dry enzymatic hydrolysis bamboo fibre particle to be placed in Muffle furnace, at 125 DEG C
After heat-insulation preheating 13min, then 5 DEG C/min is pressed, be warming up to 875 DEG C, after heat preservation carbonizes 2.5h, collects to obtain charing particle；By weight
Number meter weighs 47 parts of deionized waters, -6,4 parts of sodium metaaluminates of 17 parts of 18- crown ethers, 4 parts of silica solution respectively and is placed in three-necked flask
In, it is stirred 1.5h, obtains mixed sols, then according to parts by weight, weighs 47 parts of mixed sols, 13 parts of mass fractions respectively
10% Klorvess Liquid, 10% silver nitrate solution of mass fraction and 13 parts of charing particles are placed in mortar, and grinding distribution is simultaneously collected
Disperse slurries, collects dispersion slurries and 1:1 in mass ratio, it is mixed with deionized water and is placed in 105 DEG C of reaction kettles and steams
Vapour crystallization 110h, is centrifugated and collects lower sediment, is rinsed with deionized water to cleaning solution after being in neutrality, dry at 57 DEG C
7h is prepared into coating modification charing particle；It collects coating modification charing particle and is placed in heat preservation and dryness 11h at 57 DEG C, collect de-
Water coating modification charing particle is placed in quartz reactor, air is passed through into reactor and controls air and is passed through rate is
47mL/min, after being passed through 4min, open plasma power supply and to control output power be 30W, after plasma treatment 15min,
4h is stood, the high adsorption flue gas demercuration adsorbent material can be prepared into；The pre-preg liquid preparation step is to press
It is sub- to weigh 47 parts of deionized waters, 13 parts of 15 sodium hydroxide solutions of mass fraction and 7 parts of mass fractions 8% respectively for parts by weight meter
Metabisulfite solution is stirred.
Embodiment 3
It takes bamboo wood and cutting and grinding is to the bamboo chip having a size of 10mm × 1mm specification, naturally dry is placed in preimpregnation after being cleaned
In stain liquid, after standing 12h, collects dipping bamboo chip and be placed in filter press, the compacting extremely dipping bamboo chip moisture content at 30 DEG C, 8MPa
It is 38%, obtains filters pressing bamboo chip and be placed in steam blasting equipment, the Steam explosion treatment 5min in the case where pressure is 1.5MPa, to steam
After the completion of explosion, then 15min is centrifugated at 5000r/min, collect lower sediment and rinsed with deionized water and wash to
It is so dry that pre-process bamboo fibre after filter press extrusion liquid pH is in neutrality；According to parts by weight, weighing 50 parts of pH respectively is 4.8
Sodium-acetate buffer, 15 parts of pretreatment bamboo fibres and 30 parts of deionized waters mix to obtain matrix liquid and by 50U/g, by cellulase
It is added in matrix liquid, is stirred and is placed in hydrolysis process 78h at 55 DEG C, stewing process simultaneously filters, and collects filter cake and vacuum
Freeze-drying must dry enzymatic hydrolysis bamboo fibre particle；It collects dry enzymatic hydrolysis bamboo fibre particle to be placed in Muffle furnace, be protected at 150 DEG C
After temperature preheating 15min, then 5 DEG C/min is pressed, be warming up to 900 DEG C, after heat preservation carbonizes 3h, collects to obtain charing particle；In parts by weight
Meter weighs 50 parts of deionized waters, -6,5 parts of sodium metaaluminates of 20 parts of 18- crown ethers, 5 parts of silica solution respectively and is placed in three-necked flask, stirs
Mixing 2h is mixed, obtains mixed sols, then according to parts by weight, weighs 50 parts of mixed sols, 15 parts of 10% chlorinations of mass fraction respectively
Potassium solution, 10% silver nitrate solution of mass fraction and 15 parts of charing particles are placed in mortar, and grinding distribution simultaneously collects dispersion slurries,
Dispersion slurries and 1:1 in mass ratio are collected, it is mixed with deionized water and is placed in 110 DEG C of reaction kettles and steam crystallization
120h is centrifugated and collects lower sediment, is rinsed with deionized water to cleaning solution after being in neutrality, dry 8h, system at 60 DEG C
It is standby that coating modification carbonizes particle；It collects coating modification charing particle and is placed in heat preservation and dryness 12h at 60 DEG C, collect dehydration cladding
Modified charing particle is placed in quartz reactor, and it is 50mL/ that air is passed through into reactor and controls air to be passed through rate
Min, after being passed through 5min, open plasma power supply simultaneously controls output power as 30W, after plasma treatment 15min, stands
5h can be prepared into the high adsorption flue gas demercuration adsorbent material；The pre-preg liquid preparation step is, by weight
Number meter weighs 50 parts of deionized waters, 15 parts of 15 sodium hydroxide solutions of mass fraction and 8 parts of 8% sulfurous acid of mass fraction respectively
Sodium solution is stirred.
Embodiment 1,2,3 prepared by the present invention is subjected to performance detection, specific test result such as table 1.
1 performance characterization contrast table of table
As shown in Table 1, demercuration adsorbent prepared by the present invention has excellent absorption property and demercuration efficiency.
Claims (10)
1. a kind of preparation method of high adsorption flue gas demercuration adsorbent material, it is characterised in that specific preparation step are as follows:
(1) it takes bamboo wood and cutting and grinding, clean rear naturally dry is placed in pre-preg liquid, stand collection dipping bamboo chip and be placed in
In filter press, filters pressing handle filters pressing bamboo chip is placed in steam blasting equipment, Steam explosion treatment, to steam blasting complete
Afterwards, it is centrifugated, collects lower sediment and washs, dries to obtain pretreatment bamboo fibre；
(2) according to parts by weight, 45~50 parts of sodium-acetate buffers, 10~15 parts of pretreatment bamboo fibres and 25~30 are weighed respectively
Part deionized water mixes matrix liquid and cellulase to be added in matrix liquid, is stirred and hydrolysis process h, at standing
It manages and filters, collect filter cake and vacuum freeze drying, enzymatic hydrolysis bamboo fibre particle must be dried；Dry enzymatic hydrolysis bamboo fibre particle is collected to set
In Muffle furnace, heating heats and keeps the temperature charing after heat-insulation preheating, collects to obtain charing particle；
(3) according to parts by weight, -6,3~5 parts of 45~50 parts of deionized waters, 15~20 parts of 18- crown ethers meta-aluminic acids are weighed respectively
Sodium, 3~5 parts of silica solution are placed in three-necked flask, are stirred, are obtained mixed sols, then according to parts by weight, respectively weigh 45~
50 parts of mixed sols, 10~15 parts of 10% Klorvess Liquids of mass fraction, 10% silver nitrate solution of mass fraction and 10~15 parts
Charing particle is placed in mortar, and grinding distribution simultaneously collects dispersion slurries, collects dispersion slurries and 1:1 in mass ratio, by its with go
Ionized water mixing and Crystallizing treatment, are centrifugated and collect lower sediment, wash drying, are prepared into coating modification charing particle；
(4) coating modification charing particle and heat preservation and dryness are collected, dehydration coating modification charing particle is collected and is placed in quartz reaction
It in device, is stood after blowing air and plasma treatment, the high adsorption flue gas demercuration adsorbent material can be prepared into.
2. a kind of preparation method of high adsorption flue gas demercuration adsorbent material according to claim 1, it is characterised in that:
The filters pressing processing is 35~38% for compacting extremely impregnates bamboo chip moisture content at 25~30 DEG C, 6~8MPa.
3. a kind of preparation method of high adsorption flue gas demercuration adsorbent material according to claim 1, it is characterised in that:
The Steam explosion treatment is 3~5min of Steam explosion treatment in the case where pressure is 1.25~1.5MPa.
4. a kind of preparation method of high adsorption flue gas demercuration adsorbent material according to claim 1, it is characterised in that:
The sodium-acetate buffer is that pH is 4.8 sodium-acetate buffers.
5. a kind of preparation method of high adsorption flue gas demercuration adsorbent material according to claim 1, it is characterised in that:
The cellulase additive amount is 50U/g.
6. a kind of preparation method of high adsorption flue gas demercuration adsorbent material according to claim 1, it is characterised in that:
Heating heats and keeps the temperature charcoal and turns at 100~150 DEG C after 10~15min of heat-insulation preheating after the heat-insulation preheating, then presses 5
DEG C/min, 850~900 DEG C are warming up to, 2~3h of heat preservation charing.
7. a kind of preparation method of high adsorption flue gas demercuration adsorbent material according to claim 1, it is characterised in that:
The Crystallizing treatment is in 100~110 DEG C of reaction kettles and 100~120h of steam crystallization.
8. a kind of preparation method of high adsorption flue gas demercuration adsorbent material according to claim 1, it is characterised in that:
It is 45~50mL/min that the air, which is passed through rate,.
9. a kind of preparation method of high adsorption flue gas demercuration adsorbent material according to claim 1, it is characterised in that:
Plasma treatment is open plasma power supply and to control output power be 30W, plasma treatment 15min.
10. a kind of preparation method of high adsorption flue gas demercuration adsorbent material according to claim 1, feature exist
In: the pre-preg liquid preparation step is according to parts by weight, to weigh 45~50 parts of deionized waters, 10~15 parts of matter respectively
15 sodium hydroxide solution of score and 6~8 parts of 8% sodium sulfite solutions of mass fraction are measured, are stirred.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111516073A (en) * | 2020-05-09 | 2020-08-11 | 浙江省林业科学研究院 | Preparation method of bamboo fiber molding composite material |
| CN114011234A (en) * | 2021-11-10 | 2022-02-08 | 山东鲁碧建材有限公司 | Dry desulfurization method for treating low-temperature flue gas |
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2019
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111516073A (en) * | 2020-05-09 | 2020-08-11 | 浙江省林业科学研究院 | Preparation method of bamboo fiber molding composite material |
| CN111516073B (en) * | 2020-05-09 | 2021-11-09 | 浙江省林业科学研究院 | Preparation method of bamboo fiber molding composite material |
| CN114011234A (en) * | 2021-11-10 | 2022-02-08 | 山东鲁碧建材有限公司 | Dry desulfurization method for treating low-temperature flue gas |
| CN114011234B (en) * | 2021-11-10 | 2024-04-23 | 山东鲁碧建材有限公司 | Dry desulfurization method for treating low-temperature flue gas |
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