CN109762623A - A kind of and demercuration coal combustion catalyst and preparation method thereof - Google Patents
A kind of and demercuration coal combustion catalyst and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to catalyst processing technique fields, and in particular to a kind of and demercuration coal combustion catalyst and preparation method thereof.The invention belongs to catalyst processing technique fields, and in particular to a kind of high activity coal combustion catalyst and preparation method thereof.The catalyst raw material each group is at ingredient and its weight fraction ratio are as follows: cerous nitrate solution, Al2O3, ferric nitrate, CuCl2, yttrium nitrate solution, gadolinium nitrate solution, MnO2, diatom ooze, hydrotalcite, palygorskite, calcium carbonate, luffa, straw, corn stover, chitosan, citric acid, methyl cyclohexanol, polyoxyethylene ether, leavening agent.The catalyst chemical stability is high, activity can be kept in a longer period of time, it can recycle and reuse, coal-fired burn rate can be effectively facilitated using the catalyst, it can achieve the effect that denitration, solid sulphur and demercuration, the discharge amount that flue dust can also be reduced, reduces environmental pollution, and application value is higher.
Description
Technical field
The invention belongs to catalyst processing technique fields, and in particular to a kind of and demercuration coal combustion catalyst and its preparation side
Method.
Background technique
Catalyst is a kind of substance that can speed up chemical reaction and itself be not consumed afterwards before the reaction, is being chemically reacted
The progress that can promote reaction using catalyst in the process, improves production efficiency, and economize on resources and the energy, and it is dirty to reduce environment
Dye, meets the strategic direction of sustainable development.The effect of catalyst can mainly be attributed to three aspects: (1) reaction rate is improved,
Increase reaction efficiency；(2) it determines response path, there is excellent selectivity；(3) reaction temperature is reduced.
Coal is important the energy and industrial chemicals, and is non-renewable resources.China is in economic high speed and increases
For a long time, air contaminant treatment is the great and urgent task that current governments at all levels face.The purification of Industrial Boiler flue gas is to control
The emphasis of reason, but appoint the scheme so administered using dedusting, denitration, desulfurization sub-unit now, cause investment big, operating cost
Height, and that there are purification efficiencies is not high, the problems such as discharging vapor and higher Pollutant emission concentration in flue.To solve
The pollution problem occurred during coal burning, in addition to the improvement to equipment and technique, using coal combustion catalyst and effectively
One of measure.The use of coal combustion catalyst can reduce the apparent activation energy of coal combustion, reduces the ignition point of coal and accelerates coal
Burn rate, accelerate the fracture of various associative keys during pyrolysis of coal, improve coal combustion efficiency, to improve production efficiency,
Reduce pollution.
The pollutant emission control of coal-burning power plant is always focus of attention problem in environmental protection.From the flue dust of beginning
Problem has had taken up one to subsequent oxysulfide, nitrogen oxides, carbon monoxide and hydrocarbon, for these pollutants
Fixed precautionary measures also achieve certain effect.But discovered in recent years, the discharge of the harmful metal elements of coal-burning power plant
It is also very important problem, although heavy metal Hg content is little, since it is with effumability, hypertoxicity and biology product
Tired characteristic is extremely serious to the harm of human body.Harm caused by mercury emissions first is that have an accumulation in biology and human body, mercury and
Its compound invades human body by different approaches such as respiratory tract, skin and alimentary canals, will cause nerve poisoning and deep tissue
Lesion.According to statistics, the mercury total amount that the whole world is discharged into atmosphere every year is about 5000 tons, and the mercury discharged in coal-fired process accounts for quite
Big specific gravity.Report statistics according to the study, coal-burning power plant is to do harm to huamn body maximum mercury emissions pollution sources, with fuel oil phase
Than the mercury emissions that fire coal generates will be higher by 10 times to 100 times, be handled the mercury of coal-burning power plant the health to environment and the mankind
Have great importance.
Summary of the invention
The present invention provides a kind of coal combustion catalyst and preparation method thereof of and demercuration, the catalyst that this method is prepared at
Divide and stablize, porosity is high and large specific surface area, catalytic activity height can recycle；Meanwhile it can effectively improve when in use
Coal combustion efficiency, improves the stability of coal combustion, also has the function of denitration and solid sulphur and demercuration, environment dirt is effectively reduced
Dye.
The scheme of the invention is realize in this way: a kind of and demercuration coal combustion catalyst, the catalyst raw material
Each constituent and its weight fraction ratio are as follows: 15 ~ 18 parts of cerous nitrate solution, Al2O315 ~ 18 parts, 8 ~ 10 parts of ferric nitrate, CuCl26~
8 parts, 6 ~ 8 parts of yttrium nitrate solution, 3 ~ 4 parts of gadolinium nitrate solution, MnO28 ~ 10 parts, 5 ~ 6 parts of diatom ooze, 5 ~ 6 parts of hydrotalcite, palygorskite
4 ~ 5 parts, 7 ~ 9 parts of calcium carbonate, 15 ~ 18 parts of luffa, 10 ~ 12 parts of straw, 4 ~ 5 parts of corn stover, 15 ~ 18 parts of chitosan, lemon
Sour 18 ~ 20 parts, 4 ~ 6 parts of methyl cyclohexanol, 3 ~ 6 parts of polyoxyethylene ether, 2 ~ 3 parts of leavening agent.
As a further improvement of the present invention, the polyoxyethylene ether is castor oil polyoxyethylene ether, fatty alcohol polyoxy
The combination of one or more of vinethene, isomeric alcohol polyethenoxy ether.
As a further improvement of the present invention, the concentration of the cerous nitrate solution is 0.03mol.L-1, yttrium nitrate solution
Concentration be 0.005mol.L-1, the concentration of gadolinium nitrate solution is 0.005mol.L-1。
As a further improvement of the present invention, leavening agent is the combination of one or both of sodium chloride, perlite.
A method of preparing the coal combustion catalyst of simultaneous demercuration, comprising the following steps:
(1) 15 ~ 18 parts of luffa, 10 ~ 12 parts of straw, 4 ~ 5 parts of corn stover are ground into 20 ~ 30 mesh powders, are subsequently placed in
90 ~ 100min is impregnated in 2wt% sodium hydroxide solution, is cleaned after then being filtered with screen cloth with distilled water, is finally placed in 60 ~ 70 DEG C
Drying box in drying obtain pretreatment powder；
(2) 15 ~ 18 parts of cerous nitrate solution, 6 ~ 8 parts of yttrium nitrate solution, 3 ~ 4 parts of gadolinium nitrate solution are placed in reaction kettle A, then
Be added 80 ~ 90 parts of dehydrated alcohol, 18 ~ 20 parts of diethanol amine, 6 ~ 8 parts of ammonium persulfate be uniformly mixed to obtain mixed solution, so
Afterwards by Al2O315 ~ 18 parts, 8 ~ 10 parts of ferric nitrate, CuCl26 ~ 8 parts, be added in mixed solution, use 2mol.L-1Solution and
2mol.L-1Strong oxdiative sodium solution adjusts pH value to 7 ~ 9, ultrasonic 60min, and 70 ~ 80 DEG C of constant temperature are stirred to react 20 ~ 22h, are cooled to room
It is filtered, washed after temperature, crushed after being dried obtains composite A at 10 ~ 20 mesh at 105 ~ 110 DEG C；
(3) composite A that pretreatment powder that (1) obtains, (2) is prepared, MnO28 ~ 10 parts, 5 ~ 6 parts of diatom ooze, water
5 ~ 6 parts of talcum, 4 ~ 5 parts of palygorskite, 7 ~ 9 parts of calcium carbonate be placed in reaction kettle B, then be added 15 ~ 18 parts of glutaraldehyde, dehydrated alcohol
It after 60 ~ 80 parts of ultrasonic mixings stir 3 ~ 4h, is filtered, washed after standing 60 ~ 80min, 8 ~ 10h is dried in vacuo at 105 ~ 110 DEG C
400 ~ 500 DEG C of 3 ~ 4h of calcining are warming up to the rate of 80 DEG C/h afterwards, 10 ~ 20 mesh of finally smashing into obtains composite material B；
(4) 15 ~ 18 parts of composite material B, chitosan, citric acid 18 ~ 20 that (3) are prepared are added in ethanol solution
Part, 4 ~ 6 parts of methyl cyclohexanol, 3 ~ 6 parts of polyoxyethylene ether, 2 ~ 3 parts of leavening agent use magnetic stirrer, ultrasonic mixing 150 ~
It is uniform that 180min is allowed to dispersion mixing, then put into reaction kettle C be 110 ~ 120 DEG C in temperature at carry out 20 ~ 22h of reaction, so
Afterwards by centrifuge washing, carry out being dried under vacuum to the coal combustion catalyst that constant weight obtains simultaneous demercuration at 40 ~ 50 DEG C.
As a further improvement of the present invention, the ultrasonic power is 600 ~ 800W, supersonic frequency 50kHZ.
The technical principle that the present invention realizes is:
The method comprises the steps of firstly, preparing composite material, after cerous nitrate solution, yttrium nitrate solution, gadolinium nitrate solution are mixed with alchlor
Composite A is obtained after dipping, composite material B is obtained after then being handled again with pretreatment powder etc., in recombination process
It can obtain oxide i.e. cerium oxide, yttrium oxide, the gadolinium oxide of cerous nitrate, yttrium nitrate, gadolinium nitrate after calcining, cerium oxide,
Yttrium oxide, gadolinium oxide and aluminium oxide etc. reduce its dispersion by the way that catalytic active substance will not be made after compound to reunite in carrier surface
Degree influences its activity, so as to obtain the catalyst of high thermal stability, high-specific surface area, so that the catalyst is in coal-fired mistake
Higher catalytic activity is kept in journey, improves efficiency of fire coal.
Cerium oxide has preferable oxygen storage capacity in the catalyst, and Ce has Ce3+And Ce4+, can occur between each other anti-
It answers.Under the conditions of hypoxgia, part Ce4+It is reduced to Ce3+, generate the CeO containing Lacking oxygen2-x.However, when oxygen abundance, Ce3+
It is oxidized to Ce4+, cause the CeO generated2-xIt is converted into CeO2, so that CeO2Possess stronger Oxygen storage capacity.It is fired in fire coal
Oxygen can be provided during burning for coal dust, manganese dioxide can release active oxygen or oxidizing substance, mutual with cerium oxide
Effect is to enhance coal dust firing.Yttrium oxide, gadolinium oxide catalytic activity with higher can promote the catalytic activity of catalyst.
The ferric nitrate of addition can form the oxide of iron after firing, and iron-containing oxidation catalyst can be by flue gas in fire coal
Elemental Mercury almost all is converted to mercury oxide, so as to by the mercury removal in coal.CuCl in catalyst during the reaction2
CuCl is reduced to during oxidizing simple substance mercury to inactivating, under the action of oxygen the Cu in above-mentioned CuCl+Again oxygen
Turn to Cu2+To continue to act on mercury, the palygorskite of addition have biggish specific surface area simultaneously also can Adsorption of Mercury substance, this
Outer chitosan can increase the action site of catalyst, while catalyst substrate being made to have good absorption and dispersion, mention
The catalytic effect of high catalyst, and chitosan itself has stronger suction-operated to mercury, oxide, CuCl with iron2Mutually
Effect can effectively remove the mercury in fire coal.In addition chitosan also can be improved the formation of the Lacking oxygen of catalyst surface, with oxygen
Change cerium, manganese dioxide interaction enables fire coal full combustion.
Catalytic active substance can be allowed to be inserted into its interlayer in diatom ooze, the hydrotalcite of addition, kept during the sintering process
The stability of catalytic active substance keeps its activity.After luffa, straw, corn stover are handled with composite material into
Row crosslinking enables to composite material to be sufficiently supported on pretreated powder surface, then by roasting so that composite material is formed
Uniform hole, increases the stability of its space structure, while increasing its specific surface area.Furthermore after straw, corn stover sintering
Main component is silica, and silica can enhance the wearability of catalyst, chemical stability, to guarantee catalyst
Activity is conducive to recycling and uses.Calcium carbonate, the citric acid of addition have the effect of solid sulphur desulfurization.Leavening agent can make catalyst all
It is bulk to enclose combustible, increases and supports area, fire coal is more fully burnt, to improve efficiency of fire coal, together
When can reduce the discharge amount of flue dust again, reduce environmental pollution.
The present invention has following good result:
1. the catalyst chemical stability that the present invention is prepared is high, activity can be kept in a longer period of time, can be recycled
Recycling can effectively facilitate coal-fired burn rate using the catalyst, can reach the effect of denitration, solid sulphur and demercuration
Fruit, additionally it is possible to which the discharge amount for reducing flue dust reduces environmental pollution.
2. the catalyst properties that the present invention is prepared are excellent, the density of the catalyst is 1.85 ~ 1.92g.ml-1,
Average pore size is 21587 ~ 223.45nm, and porosity is 95.63 ~ 96.87%, and specific surface area is 889.45 ~ 917.52m2.g-1,
Testing denitrification rate in use process is 95.59 ~ 97.21%, and desulfurization degree is 94.25 ~ 95.82%, and demercuration rate is 95.68 ~ 96.41%,
Boiler thermal efficiency improves 30.58 ~ 32.05%, and coal saving rate is 29.87 ~ 30.53%.
Specific embodiment
A kind of coal combustion catalyst and preparation method thereof of simultaneous demercuration of the description present invention with reference to embodiments, these descriptions are simultaneously
It is not to be further limited to the content of present invention.
Embodiment 1
15 parts of luffa, 11 parts of straw, 5 parts of corn stover are ground into 28 mesh powders, it is molten to be subsequently placed in 2wt% sodium hydroxide
90min is impregnated in liquid, is cleaned after then being filtered with screen cloth with distilled water, is finally placed in drying in 68 DEG C of drying box and is obtained pre- place
Manage powder；
It is 0.03mol.L by concentration-117 parts of cerous nitrate solution, concentration 0.005mol.L-16.5 parts of yttrium nitrate solution, dense
Degree is 0.005mol.L-14 parts of gadolinium nitrate solution be placed in reaction kettle A, then be added 85 parts of dehydrated alcohol, diethanol amine 19
Part, 7.5 parts of ammonium persulfate be uniformly mixed to obtain mixed solution, then by Al2O318 parts, 9 parts of ferric nitrate, CuCl27.5 part
It is added in mixed solution, uses 2mol.L-1Solution and 2mol.L-1Strong oxdiative sodium solution adjusts pH value to 8.5, then in ultrasound
Ultrasound 60min under the conditions of power is 600W, supersonic frequency is 50kHZ, 78 DEG C of constant temperature are stirred to react 21h, mistake after being cooled to room temperature
Filter, washing, crushed after being dried obtains composite A at 20 mesh at 106 DEG C；
By the pretreatment powder being prepared, the composite A being prepared, MnO29.5 parts, 6 parts of diatom ooze, hydrotalcite 5.5
Part, 5 parts of palygorskite, 8 parts of calcium carbonate be placed in reaction kettle B, then be added 17 parts of glutaraldehyde, 65 parts of dehydrated alcohol, in ultrasonic function
Under the conditions of rate is 750W, supersonic frequency is 50kHZ after ultrasonic mixing stirring 4h, it is filtered, washed after standing 70min, at 106 DEG C
500 DEG C of calcining 4h are warming up to the rate of 80 DEG C/h after vacuum drying 8.5h, 10 mesh of finally smashing into obtains composite material B；
The composite material B being prepared, 16 parts of chitosan, 18.5 parts of citric acid, methyl cyclohexane are added in ethanol solution
5 parts of alcohol, polyoxyethylene ether are 3 parts of castor oil polyoxyethylene ether, leavening agent is 2.8 parts of sodium chloride and uses magnetic stirrer,
It is uniform that ultrasonic mixing 160min is allowed to dispersion mixing, then put into reaction kettle C be 120 DEG C in temperature at carry out reaction 20.5h,
Then pass through centrifuge washing, carry out being dried under vacuum to the coal combustion catalyst that constant weight obtains simultaneous demercuration at 40 DEG C.
Embodiment 2
16.5 parts of luffa, 10.5 parts of straw, 4.8 parts of corn stover are ground into 30 mesh powders, are subsequently placed in 2wt% hydrogen-oxygen
Change in sodium solution and impregnate 93min, is cleaned after then being filtered with screen cloth with distilled water, be finally placed in 70 DEG C of drying box and dry
To pretreatment powder；
It is 0.03mol.L by concentration-116 parts of cerous nitrate solution, concentration 0.005mol.L-17.5 parts of yttrium nitrate solution, dense
Degree is 0.005mol.L-13 parts of gadolinium nitrate solution be placed in reaction kettle A, then be added 90 parts of dehydrated alcohol, diethanol amine 19.5
Part, 6 parts of ammonium persulfate be uniformly mixed to obtain mixed solution, then by Al2O317 parts, 9.5 parts of ferric nitrate, CuCl27 parts, plus
Enter into mixed solution, uses 2mol.L-1Solution and 2mol.L-1Strong oxdiative sodium solution adjusts pH value to 7, then in ultrasonic power
Ultrasound 60min under the conditions of being 50kHZ for 750W, supersonic frequency, 72 DEG C of constant temperature are stirred to react 20h, filter, wash after being cooled to room temperature
It washs, crushed after being dried obtains composite A at 10 mesh at 105 DEG C；
By the pretreatment powder being prepared, the composite A being prepared, MnO28 parts, 5.5 parts of diatom ooze, hydrotalcite 5.8
Part, 4.2 parts of palygorskite, 9 parts of calcium carbonate be placed in reaction kettle B, then be added 16 parts of glutaraldehyde, 60 parts of dehydrated alcohol, in ultrasound
Under the conditions of power is 700W, supersonic frequency is 50kHZ after ultrasonic mixing stirring 3h, it is filtered, washed after standing 60min, at 105 DEG C
450 DEG C of calcining 3h are warming up to the rate of 80 DEG C/h after lower vacuum drying 10h, 20 mesh of finally smashing into obtains composite material B；
The composite material B being prepared, 17 parts of chitosan, 19 parts of citric acid, methyl cyclohexanol are added in ethanol solution
5.5 parts, polyoxyethylene ether be 6 parts of fatty alcohol polyoxyethylene ether, leavening agent be sodium chloride and perlite totally 2 parts use magnetic agitation
Device stirring, it is uniform that ultrasonic mixing 150min is allowed to dispersion mixing, then put into reaction kettle C be 105 DEG C in temperature at carry out it is anti-
21h is answered, centrifuge washing is then passed through, carries out being dried under vacuum to the coal combustion catalyst that constant weight obtains simultaneous demercuration at 45 DEG C.
Embodiment 3
18 parts of luffa, 10 parts of straw, 4 parts of corn stover are ground into 25 mesh powders, it is molten to be subsequently placed in 2wt% sodium hydroxide
Impregnate 100min in liquid, cleaned after then being filtered with screen cloth with distilled water, be finally placed in 65 DEG C of drying box drying obtain it is pre-
Handle powder；
It is 0.03mol.L by concentration-115 parts of cerous nitrate solution, concentration 0.005mol.L-16 parts of yttrium nitrate solution, concentration
For 0.005mol.L-13.8 parts of gadolinium nitrate solution be placed in reaction kettle A, then be added 82 parts of dehydrated alcohol, diethanol amine 18
Part, 7 parts of ammonium persulfate be uniformly mixed to obtain mixed solution, then by Al2O316 parts, 8 parts of ferric nitrate, CuCl26.5 part adds
Enter into mixed solution, uses 2mol.L-1Solution and 2mol.L-1Strong oxdiative sodium solution adjusts pH value to 8, then in ultrasonic power
Ultrasound 60min under the conditions of being 50kHZ for 800W, supersonic frequency, 70 DEG C of constant temperature are stirred to react 21.5h, filtered after being cooled to room temperature,
Washing, crushed after being dried obtains composite A at 20 mesh at 108 DEG C；
By the pretreatment powder being prepared, the composite A being prepared, MnO29 parts, 5 parts of diatom ooze, 5.2 parts of hydrotalcite,
4 parts of palygorskite, 8.5 parts of calcium carbonate be placed in reaction kettle B, then be added 18 parts of glutaraldehyde, 80 parts of dehydrated alcohol, in ultrasonic power
Under the conditions of being 50kHZ for 600W, supersonic frequency after ultrasonic mixing stirring 3.2h, it is filtered, washed after standing 80min, at 110 DEG C
400 DEG C of calcining 3.2h are warming up to the rate of 80 DEG C/h after vacuum drying 8h, 10 mesh of finally smashing into obtains composite material B；
The composite material B being prepared, 18 parts of chitosan, 20 parts of citric acid, methyl cyclohexanol 6 are added in ethanol solution
Part, polyoxyethylene ether are 4 parts of isomeric alcohol polyethenoxy ether, leavening agent is 2.3 parts of perlite using magnetic stirrer, ultrasound
It is uniform that mixing 170min is allowed to dispersion mixing, then put into reaction kettle C be 108 DEG C in temperature at carry out reaction 22h, then pass through
Centrifuge washing is crossed, carries out being dried under vacuum to the coal combustion catalyst that constant weight obtains simultaneous demercuration at 50 DEG C.
Embodiment 4
16 parts of luffa, 12 parts of straw, 4.5 parts of corn stover are ground into 20 mesh powders, are subsequently placed in 2wt% sodium hydroxide
Impregnate 95min in solution, cleaned after then being filtered with screen cloth with distilled water, be finally placed in 60 DEG C of drying box drying obtain it is pre-
Handle powder；
It is 0.03mol.L by concentration-118 parts of cerous nitrate solution, concentration 0.005mol.L-17 parts of yttrium nitrate solution, concentration
For 0.005mol.L-13.2 parts of gadolinium nitrate solution be placed in reaction kettle A, then be added 80 parts of dehydrated alcohol, diethanol amine 18.5
Part, 8 parts of ammonium persulfate be uniformly mixed to obtain mixed solution, then by Al2O315 parts, 8.5 parts of ferric nitrate, CuCl28 parts, plus
Enter into mixed solution, uses 2mol.L-1Solution and 2mol.L-1Strong oxdiative sodium solution adjusts pH value to 9, then in ultrasonic power
Ultrasound 60min under the conditions of being 50kHZ for 700W, supersonic frequency, 75 DEG C of constant temperature are stirred to react 22h, filter, wash after being cooled to room temperature
It washs, crushed after being dried obtains composite A at 10 mesh at 107 DEG C；
By the pretreatment powder being prepared, the composite A being prepared, MnO28.5 parts, 5.2 parts of diatom ooze, hydrotalcite 6
Part, 4.8 parts of palygorskite, 7 parts of calcium carbonate be placed in reaction kettle B, 16.5 parts of glutaraldehyde, 75 parts of dehydrated alcohol is then added, super
Under the conditions of acoustical power is 650W, supersonic frequency is 50kHZ after ultrasonic mixing stirring 3.5h, it is filtered, washed after standing 65min,
It is dried in vacuo at 108 DEG C after 9h and 480 DEG C of calcining 3.4h is warming up to the rate of 80 DEG C/h, 20 mesh of finally smashing into obtains composite wood
Expect B；
The composite material B being prepared, 15 parts of chitosan, 18 parts of citric acid, methyl cyclohexanol are added in ethanol solution
4 parts, polyoxyethylene ether be totally 5 parts of castor oil polyoxyethylene ether and isomeric alcohol polyethenoxy ether, leavening agent is 2.5 parts of sodium chloride makes
With magnetic stirrer, it is uniform that ultrasonic mixing 165min is allowed to dispersion mixing, and then putting into reaction kettle C in temperature is 110
Reaction 21.5h is carried out at DEG C, then passes through centrifuge washing, carries out being dried under vacuum to the combustion that constant weight obtains simultaneous demercuration at 42 DEG C
Coal catalyst.
Embodiment 5
17 parts of luffa, 11.5 parts of straw, 4.2 parts of corn stover are ground into 23 mesh powders, are subsequently placed in 2wt% hydroxide
98min is impregnated in sodium solution, is cleaned after then being filtered with screen cloth with distilled water, is finally placed in drying in 63 DEG C of drying box and is obtained
Pre-process powder；
It is 0.03mol.L by concentration-116.5 parts of cerous nitrate solution, concentration 0.005mol.L-18 parts of yttrium nitrate solution, dense
Degree is 0.005mol.L-13.5 parts of gadolinium nitrate solution be placed in reaction kettle A, then be added 88 parts of dehydrated alcohol, diethanol amine 20
Part, 6.5 parts of ammonium persulfate be uniformly mixed to obtain mixed solution, then by Al2O316.5 parts, 10 parts of ferric nitrate, CuCl26
Part is added in mixed solution, uses 2mol.L-1Solution and 2mol.L-1Strong oxdiative sodium solution adjusts pH value to 7.5, then super
Ultrasound 60min under the conditions of acoustical power is 650W, supersonic frequency is 50kHZ, 80 DEG C of constant temperature are stirred to react 20.5h, are cooled to room temperature
After be filtered, washed, crushed after being dried obtains composite A at 20 mesh at 110 DEG C；
By the pretreatment powder being prepared, the composite A being prepared, MnO210 parts, 5.8 parts of diatom ooze, hydrotalcite 5
Part, 4.5 parts of palygorskite, 7.5 parts of calcium carbonate be placed in reaction kettle B, 15 parts of glutaraldehyde, 70 parts of dehydrated alcohol is then added, super
Under the conditions of acoustical power is 800W, supersonic frequency is 50kHZ after ultrasonic mixing stirring 3.8h, it is filtered, washed after standing 75min,
It is dried in vacuo at 109 DEG C after 9.5h and 430 DEG C of calcining 3.8h is warming up to the rate of 80 DEG C/h, 10 mesh of finally smashing into obtains compound
Material B；
The composite material B being prepared, 16.5 parts of chitosan, 19.5 parts of citric acid, methyl ring are added in ethanol solution
4.5 parts of hexanol, polyoxyethylene ether are totally 4.5 parts of castor oil polyoxyethylene ether and fatty alcohol polyoxyethylene ether, leavening agent is chlorination
Sodium and perlite use magnetic stirrer for totally 3 parts, and it is uniform that ultrasonic mixing 180min is allowed to dispersion mixing, then investment reaction
Reaction 20h is carried out at being 112 DEG C in temperature in kettle C, then passes through centrifuge washing, be dried under vacuum to constant weight i.e. at 48 DEG C
Obtain the coal combustion catalyst of simultaneous demercuration.
In order to verify the performance for the coal combustion catalyst that the present invention is prepared, the embodiment of the present invention 1 ~ 5 is prepared
Catalyst is tested for the property, while being compared using commercially available similar catalyst as control group, while testing urging for catalyst
Change effect, test situation is as shown in table 1 below.
1 coal combustion catalyst performance test situation of table and catalytic effect
The above embodiment of the present invention scheme is only the description of the invention and cannot limit the present invention, this is indicated in claim
Invention product form ingredient, component ratio, the range of preparation method parameter, and above-mentioned explanation does not point out parameter of the present invention
Range, therefore, any change within the meaning and scope equivalent to the claims of the present invention, be all considered to be including
Within the scope of the claims.
The present invention is and to pass through creative labor by multidigit coal combustion catalyst processing technology personnel's long-term work experience accumulation
Dynamic creation and go out, the catalyst chemical stability that the present invention is prepared is high, can keep active in a longer period of time, can be with
It recycles and reuses, coal-fired burn rate can be effectively facilitated using the catalyst, denitration, solid sulphur and demercuration can be reached
Effect, additionally it is possible to the discharge amount for reducing flue dust reduces environmental pollution, and application value is higher.
Claims (6)
1. a kind of and demercuration coal combustion catalyst, which is characterized in that the catalyst raw material each group is at ingredient and its parts by weight
Number ratio are as follows: 15 ~ 18 parts of cerous nitrate solution, Al2O315 ~ 18 parts, 8 ~ 10 parts of ferric nitrate, CuCl26 ~ 8 parts, 6 ~ 8 parts of yttrium nitrate solution,
3 ~ 4 parts of gadolinium nitrate solution, MnO28 ~ 10 parts, 5 ~ 6 parts of diatom ooze, 5 ~ 6 parts of hydrotalcite, 4 ~ 5 parts of palygorskite, calcium carbonate 7 ~ 9 part, thread
15 ~ 18 parts of melon network, 10 ~ 12 parts of straw, 4 ~ 5 parts of corn stover, 15 ~ 18 parts of chitosan, 18 ~ 20 parts of citric acid, methyl cyclohexanol 4
~ 6 parts, 3 ~ 6 parts of polyoxyethylene ether, 2 ~ 3 parts of leavening agent.
2. a kind of and demercuration coal combustion catalyst as described in claim 1, which is characterized in that the polyoxyethylene ether is castor
The combination of one or more of sesame oil polyoxyethylene ether, fatty alcohol polyoxyethylene ether, isomeric alcohol polyethenoxy ether.
3. as described in claim 1 or 2 is any a kind of and demercuration coal combustion catalyst, which is characterized in that the cerous nitrate
The concentration of solution is 0.03mol.L-1, the concentration of yttrium nitrate solution is 0.005mol.L-1, the concentration of gadolinium nitrate solution is
0.005mol.L-1。
4. the coal combustion catalyst of a kind of as described in claim 1 ~ 3 is any and demercuration, which is characterized in that the leavening agent is
The combination of one or both of sodium chloride, perlite.
5. a kind of method for the coal combustion catalyst for preparing the simultaneous demercuration as described in claim 1 ~ 4 is any, which is characterized in that including
Following steps:
15 ~ 18 parts of luffa, 10 ~ 12 parts of straw, 4 ~ 5 parts of corn stover are ground into 20 ~ 30 mesh powders by step 1), are then set
90 ~ 100min is impregnated in 2wt% sodium hydroxide solution, is cleaned after then being filtered with screen cloth with distilled water, is finally placed in 60 ~ 70
DEG C drying box in drying obtain pretreatment powder；
15 ~ 18 parts of cerous nitrate solution, 6 ~ 8 parts of yttrium nitrate solution, 3 ~ 4 parts of gadolinium nitrate solution are placed in reaction kettle A by step 2), so
Afterwards be added 80 ~ 90 parts of dehydrated alcohol, 18 ~ 20 parts of diethanol amine, 6 ~ 8 parts of ammonium persulfate be uniformly mixed to obtain mixed solution,
Then by Al2O315 ~ 18 parts, 8 ~ 10 parts of ferric nitrate, CuCl26 ~ 8 parts, be added in mixed solution, use 2mol.L-1Solution and
2mol.L-1Strong oxdiative sodium solution adjusts pH value to 7 ~ 9, ultrasonic 60min, and 70 ~ 80 DEG C of constant temperature are stirred to react 20 ~ 22h, are cooled to room
It is filtered, washed after temperature, crushed after being dried obtains composite A at 10 ~ 20 mesh at 105 ~ 110 DEG C；
The pretreatment powder that step 1) obtains, step 2) are prepared step 3) composite A, MnO28 ~ 10 parts, diatom ooze
5 ~ 6 parts, 5 ~ 6 parts of hydrotalcite, 4 ~ 5 parts of palygorskite, 7 ~ 9 parts of calcium carbonate be placed in reaction kettle B, then be added 15 ~ 18 parts of glutaraldehyde,
It after 60 ~ 80 parts of ultrasonic mixings of dehydrated alcohol stir 3 ~ 4h, is filtered, washed after standing 60 ~ 80min, vacuum is dry at 105 ~ 110 DEG C
400 ~ 500 DEG C of 3 ~ 4h of calcining are warming up to the rate of 80 DEG C/h after dry 8 ~ 10h, 10 ~ 20 mesh of finally smashing into obtains composite material
B；
15 ~ 18 parts of composite material B, chitosan, the citric acid that step 3) is prepared is added in step 4) in ethanol solution
18 ~ 20 parts, 4 ~ 6 parts of methyl cyclohexanol, 3 ~ 6 parts of polyoxyethylene ether, 2 ~ 3 parts of leavening agent use magnetic stirrer, ultrasound is mixed
Closing 150 ~ 180min, to be allowed to dispersion mixing uniform, then put into reaction kettle C be 110 ~ 120 DEG C in temperature at carry out reaction 20 ~
Then 22h passes through centrifuge washing, carry out being dried under vacuum to the coal combustion catalyst that constant weight obtains simultaneous demercuration at 40 ~ 50 DEG C.
It being prepared and the coal combustion catalyst of demercuration 6. as claimed in claim 5, which is characterized in that the ultrasonic power is 600 ~
800W, supersonic frequency 50kHZ.
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| CN110548501A (en) * | 2019-07-26 | 2019-12-10 | 天津浩创节能环保设备有限公司 | denitration and demercuration catalyst and preparation method thereof |
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