CN110368891A - A kind of Zn of activationxIn(3-x)S4And preparation method thereof with the application as mercury absorbent - Google Patents
A kind of Zn of activationxIn(3-x)S4And preparation method thereof with the application as mercury absorbent Download PDFInfo
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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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- 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
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/024—Compounds of Zn, Cd, Hg
- B01J20/0244—Compounds of Zn
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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
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0248—Compounds of B, Al, Ga, In, Tl
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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
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0274—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04 characterised by the type of anion
- B01J20/0285—Sulfides of compounds other than those provided for in B01J20/045
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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
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3021—Milling, crushing or grinding
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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
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/305—Addition of material, later completely removed, e.g. as result of heat treatment, leaching or washing, e.g. for forming pores
- B01J20/3057—Use of a templating or imprinting material ; filling pores of a substrate or matrix followed by the removal of the substrate or matrix
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/60—Heavy metals or heavy metal compounds
- B01D2257/602—Mercury or mercury compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The present invention relates to a kind of Zn of activationxIn(3‑x)S4And preparation method thereof with the application as mercury absorbent, belong to coal-fired flue-gas Pollutant Control Technology field.Preparation method is that zinc salt and indium salts are dissolved in deionized water, then template and sulphur source is added, after mixing well, it is placed in the reaction kettle of sealing and carries out hydro-thermal reaction, then filtered, solid phase is washed and dried, yellow mercury oxide is obtained, then is ground, processing is then modified to the yellow mercury oxide after grinding using low temperature plasma, the operating voltage of low temperature plasma is preferably 20kV-60kV, the Zn activatedxIn(3‑x)S4, the value range of the x is 0 < x < 3.Preparation method of the present invention is simple and reliable, low in cost, and demercuration efficiency is high when application as mercury absorbent, and the window temperature of application is wide, and has good anti-H2O and SO2Poisoning performance can substantially reduce demercuration cost.
Description
Technical field
The invention belongs to coal-fired flue-gas Pollutant Control Technology fields, more particularly, to a kind of Zn of activationxIn(3-x)
S4And preparation method thereof with the application as mercury absorbent.
Background technique
Mercury is a kind of toxic atmosphere pollution, is caused great harm to ecological environment and the mankind.Coal-burning power plant is recognized
To be the largest one of artificial mercury emissions source.2013, U.S.EPA (EPA) updated the mercury emissions standard of coal-burning power plant, should
The mercury quantity that the power plant of standard requirements current combustion low-order coal is discharged has to be lower than 0.003lb/GWh.What Chinese environmental protection portion promulgated
" fossil-fuel power plant atmospheric pollutant emission standard " requirement: thermal power plant executed 0.03mg/m from January 1st, 20153Mercury and chemical combination
Object pollutant emission limit.The high status of mercury content in Huge cardinal and coal based on China's fired power generating unit, exploitation is efficient, passes through
Ji, environmental-friendly Mercury vacancy technology are extremely urgent.
Mercury in coal-fired flue-gas includes Elemental Mercury (Hg0), oxidation state mercury (Hg2+) and particle mercury (Hgp)。Hg0Due to volatilization
Property high, the reasons such as water-soluble low and chemical inertness, be difficult to be removed by existing air pollution control devices.Therefore, Hg0Capture
It is one of coal-burning power plant's mercury control ultimate challenge.Coal-burning power plant's mercury control technology mainly includes catalysis oxidation, bromination
The technologies such as object addition and sorbent injection.With the technologies such as catalysis oxidation and bromide addition, Hg0It can be effectively oxidized to
Hg2+, then effectively removed by wet desulphurization equipment.However, the essence of both technologies is to shift mercury from coal-fired flue-gas
It into desulfuration solution or desulfurized gypsum, does not tackle the problem at its root, it is easy to since the secondary release of mercury pollutes.
In coal-burning power plant's mercury control technology, sorbent injection technology is considered as most promising mercury control technology.At present
The mercury absorbent for putting into industrial application is mainly the carbon-based adsorbents such as active carbon, and the type adsorbent is primarily present following problems:
1) adsorbent amount is big, and operating cost is higher；2) unburned carbon in flue dust is influenced, the recycling of flying dust is unfavorable for；3) adsorbent with
Flying dust mixes, and can not regenerate；4) mercury adsorbed cannot be easy to cause secondary pollution by centralized control.Therefore, it needs
New and effective mercury absorbent is developed, preferably to meet the Various Complex during modernization coal-burning power plant's mercury control
Demand.
Summary of the invention
The present invention solves in the prior art that mercury absorbent adsorption efficiency is not high, and anti-sulfur dioxide and water intoxication are indifferent
The technical issues of.The present invention is modified processing to zinc indium composites by using low temperature plasma, is activated
ZnxIn(3-x)S4, with bigger specific surface area, flourishing pore structure and Adsorption abundant, can effectively adsorb combustion
Hg in flue-gas0, it is excellent to have that low in cost, structural behaviour is good, temperature window mouth width, demercuration efficiency are high, adsorption capacity is big etc.
Point.
It is according to the invention in a first aspect, providing a kind of Zn of activationxIn(3-x)S4Preparation method, including following step
It is rapid:
(1) zinc salt and indium salts are dissolved in deionized water, template and sulphur source is then added, after mixing well, obtains
The mixed solution is placed in the reaction kettle of sealing and carries out hydro-thermal reaction by mixed solution；The hydro-thermal reaction is completed, and is taken out
Filter, the solid phase obtained after suction filtration is washed and is dried, obtain yellow mercury oxide；
(2) yellow mercury oxide that step (1) obtains is ground, then using low temperature plasma to grinding after
Yellow mercury oxide is modified processing, the Zn activatedxIn(3-x)S4, the value range of the x is 0 < x < 3.
Preferably, the operating voltage of step (2) described low temperature plasma is 20kV-60kV.
Preferably, step (1) hydro-thermal reaction is to react 6h-20h under conditions of 80 DEG C -100 DEG C.
Preferably, step (1) zinc salt is at least one of zinc nitrate, zinc sulfate and zinc chloride, and the indium salts are
At least one of indium nitrate, indium sulfate and inidum chloride, the template are cetyl trimethylammonium bromide or ethylene glycol, institute
Stating sulphur source is thioacetamide, cysteine hydrochloride or thiocarbamide.
Preferably, after being ground described in step (2), further include the steps that screening, obtain partial size less than 150 μm
Yellow mercury oxide.
Preferably, the ratio between amount of substance of zinc ion and indium ion is (0.2:0.4)-(1:5), institute in the mixed solution
Stating the ratio between the sum of zinc ion and indium ion and the amount of substance of sulphur source in mixed solution is (3-5): 10.
Preferably, step (2) described modification is to carry out in air atmosphere.
It is another aspect of this invention to provide that providing the Zn for the activation that any preparation method obtainsxIn(3-x)S4。
It is another aspect of this invention to provide that providing the Zn of the activationxIn(3-x)S4Application as mercury absorbent.
Preferably, the temperature range of the application is 50 DEG C -150 DEG C.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect:
(1) efficient mercury absorbent provided by the invention is low in cost, easy to use and entirely technical process simply may be used
It leans on, convenient for manipulation, while without using the substance of strong corrosive activating agent etc.
(2) mercury absorbent of the invention can maintain higher demercuration efficiency within the scope of wider temperature window, can be in cigarette
Multiple positions are sprayed in road.Mercury absorbent of the invention can maintain 85% in temperature window (50 DEG C~150 DEG C) range
Above demercuration efficiency, and there is good anti-H2O and SO2Poisoning performance.Preferred adsorbent ZnIn2S4Mercury absorbent exists
90% or more demercuration efficiency can be maintained within the scope of 75 DEG C~125 DEG C, and there is good anti-H2O and SO2Poisoning performance.
(3) mercury absorbent of the invention is modified place to material surface molecules by low-temperature plasma activation process
Reason, it is modified generally to only occur in superficial layer (several to hundreds of nanometers), while improving material surface property, do not change base
Body proper property.And action time is short (several seconds to a few minutes) every time, high-efficient, effect is good.Simultaneous reactions system can be in air
It is carried out under atmosphere, reaction environment temperature is low, and simple process is easy to operate, does not generate secondary pollution, meets energy conservation and environmentally friendly and wants
It asks.
(4) preferably, the operating voltage of low temperature plasma is that 20kV-60kV can in this operating voltage section to the present invention
So that the gas molecule in air is adequately ionized, the upper state particle such as free radical, electronics of generation has enough energy and inhales
Attached dose of surface action generates polar group, free radical isoreactivity group, to improve the demercuration energy of adsorbent on the surface of the material
Power.
(5) after mercury absorbent of the invention is by grinding, the granularity of adsorbent can be effectively reduced, increases its ratio
Surface area improves the efficiency of low-temperature plasma activation process.
(6) mercury absorbent prepared by the present invention has big specific surface area, flourishing pore structure and surface abundant
Active sites, demercuration efficiency are high, adsorption capacity is big, conducive to the efficient removal of mercury especially Elemental Mercury is realized, thus are a kind of great
The demercuration material of prospects for commercial application.
Detailed description of the invention
Fig. 1 is ZnIn obtained in the embodiment of the present invention 12S4Mercury absorbent changes without low-temperature plasma activation process
Property processing stereoscan photograph.
Fig. 2 is ZnIn obtained in the embodiment of the present invention 12S4Mercury absorbent is modified by low-temperature plasma activation process
The stereoscan photograph of processing.
Fig. 3 is demercuration efficiency of the adsorbent in wide temperature window ranges in the embodiment of the present invention 1.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
A kind of efficient mercury absorbent and preparation method thereof, comprising the following steps:
(1) in deionized water by zinc salt substance and the dissolution of indium salts substance, it under room temperature, through magnetic agitation, is mixed
Close solution I；
(2) under conditions of magnetic agitation, template, mixing speed 80 is added into the mixed solution I of step (1) acquisition
~200r/min stirs to being completely dissolved under the conditions of 50~80 DEG C, forms mixed solution II；In mixed solution II, zinc ion
Molar ratio with indium ion is 0.2:0.4~1:5；The molar ratio of zinc ion and indium ion is to determine the adsorbent being prepared
In zinc and indium molar ratio；
(3) under conditions of magnetic agitation, thioacetamide is added into mixed solution II, is stirred under the conditions of 50~80 DEG C
It mixes to being completely dissolved, forms mixed solution III；In mixed solution III, the sum of amount of substance of zinc ion and indium ion and thio second
The molar ratio of amide is 0.3:0.5~1:3；
(4) mixed solution III in step (3) is moved into hydrothermal reaction kettle and is sealed, react 6 under conditions of 80~100 DEG C
~20h is filtered, washing, and dry 6~10h, obtains yellow mercury oxide under vacuum condition；
(5) yellow mercury oxide obtained in step (4) is ground, then using the low of 20kV~60kV operating voltage
Isothermal plasma, is modified processing to the yellow mercury oxide after grinding under air atmosphere, thus obtains required
ZnxIn(3-x)S4Adsorbent.
Embodiment 1
A kind of efficient mercury absorbent, chemical expression ZnIn2S4.Preparation method, comprising the following steps:
(1) a certain amount of zinc sulfate and indium sulfate dissolution are weighed in deionized water.
(2) then, a certain amount of cetyl is added in the mixed solution under stirring conditions, obtained to step (1)
Trimethylammonium bromide and thioacetamide, so that the molar ratio of Zn/In is 0.2:0.4, the sum of zinc ion and indium ion/thio second
The molar ratio of amide is 0.3:0.5.
(3) 20h is reacted under the conditions of 80 DEG C, filtered, washing, dry 10h obtains yellow mercury oxide.
(4) yellow mercury oxide is ground, the low temperature plasma of 30kV operating voltage is then used, under air atmosphere
Processing is modified to the yellow mercury oxide after grinding, obtains ZnIn2S4Mercury absorbent.
Embodiment 2
A kind of efficient mercury absorbent, chemical expression Zn0.8In2.2S4.Preparation method, comprising the following steps:
(1) a certain amount of zinc sulfate and indium sulfate dissolution are weighed in deionized water.
(2) then, a certain amount of cetyl is added in the mixed solution under stirring conditions, obtained to step (1)
Trimethylammonium bromide and thioacetamide, so that the molar ratio of Zn/In is 0.8:2.2, metal cation/thioacetamide rubs
You are than being 1:3.
(3) 6h is reacted under the conditions of 100 DEG C, filtered, washing, dry 10h obtains yellow mercury oxide.
(4) yellow mercury oxide is ground, the low temperature plasma of 30kV operating voltage is then used, under air atmosphere
Processing is modified to the yellow mercury oxide after grinding, obtains Zn0.8In2.2S4Mercury absorbent.
Embodiment 3
A kind of efficient mercury absorbent, chemical expression Zn0.5In2.5S4.Preparation method, comprising the following steps:
(1) a certain amount of zinc nitrate and indium nitrate dissolution are weighed in deionized water.
(2) then, under stirring conditions, to step (1) obtain mixed solution in be added a certain amount of ethylene glycol and
Thioacetamide, so that the molar ratio of Zn/In is 1:5, metal cation/thioacetamide molar ratio is 1:3.
(3) 20h is reacted under the conditions of 80 DEG C, filtered, washing, dry 6h obtains yellow mercury oxide.
(4) yellow mercury oxide is ground, the low temperature plasma of 40kV operating voltage is then used, under air atmosphere
Processing is modified to the yellow mercury oxide after grinding, obtains Zn0.5In2.5S4Mercury absorbent.
Embodiment 4
A kind of efficient mercury absorbent, chemical expression ZnIn2S4.Preparation method, comprising the following steps:
(1) a certain amount of zinc nitrate and indium nitrate dissolution are weighed in deionized water.
(2) then, under stirring conditions, to step (1) obtain mixed solution in be added a certain amount of ethylene glycol and
Thioacetamide, so that the molar ratio of Zn/In is 0.2:0.4, metal cation/thioacetamide molar ratio is 0.3:0.5.
(3) 20h is reacted under the conditions of 80 DEG C, filtered, washing, dry 10h obtains yellow mercury oxide.
(4) yellow mercury oxide is ground, the low temperature plasma of 40kV operating voltage is then used, under air atmosphere
Processing is modified to the yellow mercury oxide after grinding, obtains ZnIn2S4Mercury absorbent.
Embodiment 5
A kind of efficient mercury absorbent, chemical expression Zn0.8In2.2S4.Preparation method, comprising the following steps:
(1) a certain amount of zinc chloride and inidum chloride dissolution are weighed in deionized water.
(2) then, under stirring conditions, to step (1) obtain mixed solution in be added a certain amount of ethylene glycol and
Thioacetamide, so that the molar ratio of Zn/In is 0.8:2.2, metal cation/thioacetamide molar ratio is 1:3.
(3) 20h is reacted under the conditions of 80 DEG C, filtered, washing, dry 10h obtains yellow mercury oxide.
(4) yellow mercury oxide is ground, the low temperature plasma of 40kV operating voltage is then used, under air atmosphere
Processing is modified to the yellow mercury oxide after grinding, obtains Zn0.8In2.2S4Mercury absorbent.
Embodiment 6
A kind of efficient mercury absorbent, chemical expression Zn0.5In2.5S4.Preparation method, comprising the following steps:
(1) a certain amount of zinc chloride and inidum chloride dissolution are weighed in deionized water.
(2) then, a certain amount of cetyl is added in the mixed solution under stirring conditions, obtained to step (1)
Trimethylammonium bromide and thioacetamide, so that the molar ratio of Zn/In is 1:5, metal cation/thioacetamide molar ratio
For 1:3.
(3) 6h is reacted under the conditions of 100 DEG C, filtered, washing, dry 6h obtains yellow mercury oxide.
(4) yellow mercury oxide is ground, the low temperature plasma of 30kV operating voltage is then used, under air atmosphere
Processing is modified to the yellow mercury oxide after grinding, obtains Zn0.5In2.5S4Mercury absorbent.
Interpretation of result:
(1) characterization test of adsorbent:
To ZnIn made from embodiment 12S4Mercury absorbent before and after the modification of low-temperature plasma activation process by carrying out
Electron-microscope scanning, obtained electron microscope photo scanning are followed successively by Fig. 1 and Fig. 2.Comparison diagram 1 and Fig. 2 can be seen that by low-temperature plasma
After body activation procedure modification, ZnIn obtained2S4Mercury absorbent have uniform particle sizes, be of moderate size, large specific surface area and
The advantages that pore structure is more flourishing.
(2) the demercuration performance test of adsorbent:
The demercuration performance test methods of above embodiments 1~6 are identical, as described below.
The demercuration performance of adsorbent prepared by the present invention is tested in the atmospheric fixed bed reactor that internal diameter is 15mm,
Adsorbent amount is 0.2g.Test simulated flue gas composition are as follows: the concentration of mercury is 50 ± 5 μ g/m3, N2For carrier gas, O2Content is 4%,
SO2Concentration 500ppm, H2O content 8%, flue gas flow 1L/min.ZnIn2S4Adsorbent demercuration efficiency variation with temperature is such as
Shown in Fig. 3.Mercury absorbent of the invention can maintain 85% or more demercuration to imitate in temperature window (50 DEG C~150 DEG C) range
Rate, and there is good anti-H2O and SO2Poisoning performance.Preferred adsorbent ZnIn2S4Mercury absorbent is in 75 DEG C~125 DEG C models
Enclose it is interior can maintain 90% or more demercuration efficiency, and have good anti-H2O and SO2Poisoning performance.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of Zn of activationxIn(3-x)S4Preparation method, which comprises the following steps:
(1) zinc salt and indium salts are dissolved in deionized water, template and sulphur source is then added, after mixing well, is mixed
The mixed solution is placed in the reaction kettle of sealing and carries out hydro-thermal reaction by solution；The hydro-thermal reaction is completed, and is filtered, will
The solid phase obtained after suction filtration is washed and is dried, and yellow mercury oxide is obtained；
(2) yellow mercury oxide that step (1) obtains is ground, then using low temperature plasma to the yellow after grinding
Precipitating is modified processing, the Zn activatedxIn(3-x)S4, the value range of the x is 0 < x < 3.
2. the Zn activated as described in claim 1xIn(3-x)S4Preparation method, which is characterized in that step (2) described low temperature etc.
The operating voltage of gas ions is 20kV-60kV.
3. the Zn activated as described in claim 1xIn(3-x)S4Preparation method, which is characterized in that step (1) described hydro-thermal is anti-
It should be and react 6h-20h under conditions of 80 DEG C -100 DEG C.
4. the Zn activated as described in claim 1xIn(3-x)S4Preparation method, which is characterized in that step (1) described zinc salt is
At least one of zinc nitrate, zinc sulfate and zinc chloride, the indium salts are at least one in indium nitrate, indium sulfate and inidum chloride
Kind, the template is cetyl trimethylammonium bromide or ethylene glycol, and the sulphur source is thioacetamide, cysteine hydrochloric acid
Salt or thiocarbamide.
5. the Zn activated as described in claim 1xIn(3-x)S4Preparation method, which is characterized in that described in step (2) grind
After crushing, further includes the steps that screening, obtain yellow mercury oxide of the partial size less than 150 μm.
6. the Zn activated as described in claim 1xIn(3-x)S4Preparation method, which is characterized in that zinc in the mixed solution
The ratio between amount of substance of ion and indium ion is (0.2:0.4)-(1:5), the sum of zinc ion and indium ion in the mixed solution
It is (3-5) with the ratio between the amount of substance of sulphur source: 10.
7. the Zn activated as described in claim 1xIn(3-x)S4Preparation method, which is characterized in that step (2) it is described modification at
Reason is to carry out in air atmosphere.
8. the Zn for the activation that the preparation method as described in claim 1-7 is any obtainsxIn(3-x)S4。
9. the Zn activated as claimed in claim 8xIn(3-x)S4Application as mercury absorbent.
10. application as claimed in claim 9, which is characterized in that the temperature range of the application is 50 DEG C -150 DEG C.
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