CN107876011A - A kind of sulfur-bearing industrial waste gas processing method - Google Patents
A kind of sulfur-bearing industrial waste gas processing method Download PDFInfo
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- CN107876011A CN107876011A CN201711083319.5A CN201711083319A CN107876011A CN 107876011 A CN107876011 A CN 107876011A CN 201711083319 A CN201711083319 A CN 201711083319A CN 107876011 A CN107876011 A CN 107876011A
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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
- B01J20/20—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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- 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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
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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
- B01D2257/30—Sulfur compounds
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Abstract
The invention discloses a kind of sulfur-bearing industrial waste gas processing method, belong to exhaust-gas treatment preparing technical field.The present invention is using activated carbon through a series of modifications such as overpickling, heavy metallic salt solution catalyzing and activation, because activated carbon has huge specific surface area and flourishing pore structure in itself, good absorption property is made it have, is advantageous to adsorb the sulfurous gas in waste gas；The present invention is added by anaerobic type thiobacillus denitrificans bacteria suspension and potassium dihydrogen phosphate, sodium nitrate, sucrose and deionized water mix Self-made mixture, enhance adsorption capacity of the activated carbon to sulfurous gas, condensed by chilled water, utilized " ice is split " principle, reduce the water vapour content in waste gas, the activity of activated carbon is avoided to be destroyed by vapor, because charcoal absorption is exothermic reaction, the waste gas of lower temperature enters adsorption tower, be advantageous to the sulfurous gas in charcoal absorption waste gas, this industrial waste gas processing method not only reclaims sulfurous gas, also environment is produced pollution-free.
Description
Technical field
The invention discloses a kind of sulfur-bearing industrial waste gas processing method, belong to exhaust-gas treatment preparing technical field.
Background technology
Industrial waste gas, which refers to, caused in plant area of enterprise fuel combustion and production process various is discharged into containing for air
The general name of contaminant gases.
These waste gas have：Carbon dioxide, carbon disulfide, hydrogen sulfide, fluoride, nitrogen oxides, chlorine, hydrogen chloride, an oxidation
Carbon, lead sulfate mercury, beryllide, flue dust and industrial dust, are discharged into air, can pollute air.These materials pass through different ways
Footpath respiratory tract enters inside people, and the direct generation that has harm, some also has cumulative effect, can be more serious endanger the strong of people
Health.Different material has Different Effects.
Industrial waste gas processing the active carbon adsorption of principle, Production by Catalytic Combustion Process, catalytic oxidation, acid-base neutralization method, etc.
A variety of principles such as ion method.Exhaust gas treating tower uses five heavy waste gas adsorption filtration cleaning systems, industrial waste gas processing design is careful,
Purification filtering waste gas layer by layer.
Industrial waste gas processing will distinguish civilian place purification of air.Industrial waste gas processing can will effectively remove factory floor production
The organic exhaust gas such as raw benzene,toluene,xylene, ethyl acetate, acetone butanone, ethanol, acrylic acid, formaldehyde, hydrogen sulfide, titanium dioxide
The soda acid exhaust-gas treatment such as sulphur, ammonia.CS2And H2S is pollutant common in industrial gas emission, the healthy meeting to environment and biology
Produce more serious harm.CS in waste gas2And H2S can also be recycled.Viscose rayon manufacturing enterprise waste gas mainly pollutes
Thing is H2S、CS2.Typically technology waste gas is recycled using three-level alkali cleaning+active carbon adsorption at present.But this processing
The method of waste gas is inefficient, it is impossible to which it is H effectively to handle pollutant2S、CS2。
Therefore invent a kind of sulfur-bearing industrial waste gas processing method has positive effect to exhaust-gas treatment preparing technical field.
The content of the invention
The technical problems to be solved by the invention：It is burning processing for the main methods at present to yellow phosphoric tail gas,
This mode not only wastes sulfurous gas, and also environment can be polluted, and other some purification methods such as WATER-WASHING METHODs, alternating temperature
Absorption, pressure-variable adsorption and the methods of catalysis oxidation there is also it is insufficient the defects of, there is provided a kind of sulfur-bearing industrial waste gas processing side
Method.
In order to solve the above technical problems, the present invention is using technical scheme as described below：
A kind of sulfur-bearing industrial waste gas processing method, it is characterised in that specifically preparation process is：
（1）Weigh 0.5~0.7kg activated carbons to be placed in mortar after grinding, collect sieving active carbon powder, will sieve active powdered carbon
End, which is put into the beaker with 30~50mL salpeter solutions and 20~30mL nickel nitrate solutions, soaks, the sieving activity soaked
Carbon powder, then the sieving active carbon powder soaked with deionized water rinsing, and pH to 6~8 is adjusted, removal is adhered on carbon granule
Powdered carbon and impurity, the activated carbon washed, continue the activated carbon of washing being placed in Muffle kiln roasting, discharge, be modified
Activated carbon；
（2）Potassium dihydrogen phosphate, sodium nitrate, sucrose are mixed to get mixture, then mixture and water are mixed, is made by oneself
Mixed liquor；
（3）Count in parts by weight, weigh respectively and be placed in fermentation tank and stir from preparing active carbon and Self-made mixture mixing, then add
Thiobacillus denitrificans bacteria suspension, it is sealed by fermentation, obtains tunning, fermentation-derived product, remove ferment filtrate, obtains fermentation filter
Slag；
（4）Yellow phosphoric tail gas is first passed through after being condensed in the refrigerator with cooling water, the yellow phosphoric tail gas condensed, then will fermentation
Filter residue is filled in the adsorption layer inside activated carbon adsorber, continues the yellow phosphoric tail gas of condensation being passed through from bottom of towe, by with
Adsorption layer inside the activated carbon adsorber of fermentation filter residue, under nitrogen protection, sulfurous gas, and heat temperature raising are adsorbed, finally
Gas after processing is discharged from tower top, you can complete the processing to sulfur-bearing industrial waste gas.
Step（1）Described milling time is 16~20min, and grinding mesh sieve is 80~100 mesh sieves, the quality of salpeter solution
Fraction is 3%, and the mass fraction of nickel nitrate solution is 35%, and soak time is 1~2h, and sintering temperature is 500~700 DEG C, roasting
The burning time is 1~2h.
Step（2）Described potassium dihydrogen phosphate, sodium nitrate, sucrose are etc. that mass ratio, whipping temp are 20~30 DEG C, mixing
The mass ratio of thing and water is 1：3, mixing time is 12~16min.
Step（3）Described meter in parts by weight, 30~40 parts are weighed respectively and is mixed from preparing active carbon and 16~20 parts of self-controls
Close liquid and 12~16 parts of bacterial contents 107Cfu/mL thiobacillus denitrificans bacteria suspension, mixing time are 12~16min, fermentation temperature
Spend for 35~45 DEG C, fermentation time is 7~9 days.
Step（4）Described flow is 1.0 × 103m3/ h, the temperature of chilled water are 6~8 DEG C, condensation time is 4~
6min, filling thickness are 10~20cm, and adsorption temp is 45~65 DEG C.
Compared with other method, advantageous effects are the present invention：
（1）The present invention utilizes activated carbon through a series of modifications such as overpickling, heavy metallic salt solution catalyzing and activation, due to activity
Charcoal has huge specific surface area and flourishing pore structure in itself, makes it have good absorption property, modified in activity
Carbon surface introduces specific atom and compound, and metal ion is entered activated carbon surface, and urging by heavy metal ion
Change degradability, absorption degradation performance of the activated carbon to sulfurous gas is improved, followed by the reproducibility of activated carbon, by part metals
Ion reduction is into simple substance or the ion of lower valency, and utilization is loaded between atom and compound and adsorbate on the activated carbon
Combination, expand the pore structure inside activated carbon again, so as to strengthen the adsorption capacity of activated carbon, be advantageous to improve suction
Absorption property of the enclosure material to the sulfurous gas in waste gas；
（2）The present invention is added by anaerobic type thiobacillus denitrificans bacteria suspension and potassium dihydrogen phosphate, sodium nitrate, sucrose and deionized water
Self-made mixture is mixed, because Self-made mixture can not only dissolve sulfurous gas, moreover it is possible to the liquid of existence is provided to microorganism
The N element and P element and nutriment that phase environment and vital movement need, enhance energy of adsorption of the activated carbon to sulfurous gas
Power, absorption property of the sorbing material to the sulfurous gas in waste gas is improved again, it is cold that the present invention continues through chilled water progress
It is solidifying, " ice is split " principle is utilized, reduces the water vapour content in waste gas, avoids the activity of activated carbon from being destroyed by vapor,
And because charcoal absorption is exothermic reaction, the waste gas of lower temperature enters adsorption tower, is advantageous in charcoal absorption waste gas
Sulfurous gas, this industrial waste gas processing method can not only reclaim sulfurous gas, and environmentally safe.
Embodiment
Weigh 0.5~0.7kg activated carbons be placed in mortar grind 16~20min after cross 80~100 mesh sieves, collect sieving live
Property carbon powder, by sieve active carbon powder be put into 30~50mL mass fractions be 3% salpeter solution and 20~30mL matter
Measure in the beaker for the nickel nitrate solution that fraction is 35% and soak 1~2h, the sieving active carbon powder soaked, then use deionization
Water rinses the sieving active carbon powder of immersion, and adjusts pH to 6~8, removes the powdered carbon and impurity being adhered on carbon granule, obtains water
The activated carbon washed, continue for the activated carbon of washing to be placed in 500~700 DEG C of Muffle 1~2h of kiln roasting, discharge, be modified
Activated carbon, potassium dihydrogen phosphate, sodium nitrate, sucrose are mixed to get mixture by grade mass ratio, then mixture and water are pressed into quality
Than for 1：3 mixing, 12~16min is stirred at being 20~30 DEG C in temperature, Self-made mixture is obtained, counts in parts by weight, respectively
Weigh 30~40 parts and be placed in 12~16min of stirring in fermentation tank from preparing active carbon and 16~20 parts of Self-made mixture mixing, then add
It is 10 to add 12~16 parts of bacterial contents7Cfu/mL thiobacillus denitrificans bacteria suspension, it is sealed by fermentation 7~9 days, obtains at 35~45 DEG C
Tunning, fermentation-derived product, ferment filtrate is removed, obtain the filter residue that ferments, by yellow phosphoric tail gas first with 1.0 × 103m3/ h stream
Amount is passed through the yellow phosphoric tail gas after 4~6min of condensation, condensed in the refrigerator with 6~8 DEG C of cooling water, then fermentation is filtered
Slag is filled in the adsorption layer inside activated carbon adsorber, and filling thickness is 10~20cm, continue by the yellow phosphoric tail gas of condensation from
Bottom of towe is passed through, and by the adsorption layer inside the activated carbon adsorber with fermentation filter residue, under nitrogen protection, adsorbs sour gas
Body, and 45~65 DEG C are heated to, finally the gas after processing is discharged from tower top, you can complete to sulfur-bearing industrial waste gas
Processing.
Example 1
Weigh 0.5kg activated carbons be placed in mortar grind 16min after cross 80 mesh sieves, collect sieving active carbon powder, by sieving live
Property carbon powder is put into the nickel nitrate solution that the salpeter solution for being 3% with 30mL mass fractions and 20mL mass fractions are 35%
1h is soaked in beaker, the sieving active carbon powder soaked, then the sieving active carbon powder soaked with deionized water rinsing, and
PH to 6 is adjusted, the powdered carbon and impurity being adhered on carbon granule is removed, the activated carbon washed, continues to put the activated carbon of washing
In 500 DEG C of Muffle kiln roasting 1h, discharging, modified activated carbon is obtained, by waiting mass ratio by potassium dihydrogen phosphate, sodium nitrate, sugarcane
Sugar is mixed to get mixture, then by mixture and water is 1 in mass ratio：3 mixing, 12min is stirred at being 20 DEG C in temperature, is obtained
Self-made mixture, count in parts by weight, weigh 30 parts respectively and be placed in fermentation tank from preparing active carbon and 16 parts of Self-made mixture mixing
Middle stirring 12min, then 12 parts of bacterial contents are added as 107Cfu/mL thiobacillus denitrificans bacteria suspension, 7 are sealed by fermentation at 35 DEG C
My god, obtain tunning, fermentation-derived product, remove ferment filtrate, obtain the filter residue that ferments, by yellow phosphoric tail gas first with 1.0 ×
103m3/ h flow is passed through the yellow phosphoric tail gas after condensation 4min, condensed in the refrigerator with 6 DEG C of cooling water, then will hair
Ferment filter residue is filled in the adsorption layer inside activated carbon adsorber, filling thickness 10cm, continue by the yellow phosphoric tail gas of condensation from
Bottom of towe is passed through, and by the adsorption layer inside the activated carbon adsorber with fermentation filter residue, under nitrogen protection, adsorbs sour gas
Body, and 45 DEG C are heated to, finally the gas after processing is discharged from tower top, you can complete the place to sulfur-bearing industrial waste gas
Reason.
Example 2
Weigh 0.6kg activated carbons be placed in mortar grind 18min after cross 90 mesh sieves, collect sieving active carbon powder, by sieving live
Property carbon powder is put into the nickel nitrate solution that the salpeter solution for being 3% with 40mL mass fractions and 25mL mass fractions are 35%
1.5h is soaked in beaker, the sieving active carbon powder soaked, then the sieving active carbon powder soaked with deionized water rinsing,
And pH to 7 is adjusted, the powdered carbon and impurity being adhered on carbon granule are removed, the activated carbon washed, is continued the activated carbon of washing
600 DEG C of Muffle kiln roasting 1.5h is placed in, discharges, obtains modified activated carbon, by waiting mass ratio by potassium dihydrogen phosphate, nitric acid
Sodium, sucrose are mixed to get mixture, then by mixture and water are 1 in mass ratio：3 mixing, stirred at being 25 DEG C in temperature
14min, obtains Self-made mixture, counts in parts by weight, weighs 35 parts respectively from preparing active carbon and 18 parts of Self-made mixture mixing
It is placed in fermentation tank and stirs 14min, then adds 14 parts of bacterial contents as 107Cfu/mL thiobacillus denitrificans bacteria suspension, at 40 DEG C
It is sealed by fermentation 8 days, obtains tunning, fermentation-derived product, remove ferment filtrate, obtain the filter residue that ferments, yellow phosphoric tail gas is first
With 1.0 × 103m3/ h flow is passed through the yellow phosphorus tail after condensation 5min, condensed in the refrigerator with 7 DEG C of cooling water
Gas, then fermentation filter residue is filled in the adsorption layer inside activated carbon adsorber, filling thickness 15cm, continue the Huang of condensation
Phosphorus tail gas is passed through from bottom of towe, by the adsorption layer inside the activated carbon adsorber with fermentation filter residue, under nitrogen protection, absorption
Sulfurous gas, and 55 DEG C are heated to, finally the gas after processing is discharged from tower top, you can complete to sulfur-bearing industrial waste gas
Processing.
Example 3
Weigh 0.7kg activated carbons be placed in mortar grind 20min after cross 100 mesh sieves, collect sieving active carbon powder, by sieving live
Property carbon powder is put into the nickel nitrate solution that the salpeter solution for being 3% with 50mL mass fractions and 30mL mass fractions are 35%
2h is soaked in beaker, the sieving active carbon powder soaked, then the sieving active carbon powder soaked with deionized water rinsing, and
PH to 8 is adjusted, the powdered carbon and impurity being adhered on carbon granule is removed, the activated carbon washed, continues to put the activated carbon of washing
In 700 DEG C of Muffle kiln roasting 2h, discharging, modified activated carbon is obtained, by waiting mass ratio by potassium dihydrogen phosphate, sodium nitrate, sugarcane
Sugar is mixed to get mixture, then by mixture and water is 1 in mass ratio：3 mixing, 16min is stirred at being 30 DEG C in temperature, is obtained
Self-made mixture, count in parts by weight, weigh 40 parts respectively and be placed in fermentation tank from preparing active carbon and 20 parts of Self-made mixture mixing
Middle stirring 16min, then 16 parts of bacterial contents are added as 107Cfu/mL thiobacillus denitrificans bacteria suspension, 9 are sealed by fermentation at 45 DEG C
My god, obtain tunning, fermentation-derived product, remove ferment filtrate, obtain the filter residue that ferments, by yellow phosphoric tail gas first with 1.0 ×
103m3/ h flow is passed through the yellow phosphoric tail gas after condensation 6min, condensed in the refrigerator with 8 DEG C of cooling water, then will hair
Ferment filter residue is filled in the adsorption layer inside activated carbon adsorber, filling thickness 20cm, continue by the yellow phosphoric tail gas of condensation from
Bottom of towe is passed through, and by the adsorption layer inside the activated carbon adsorber with fermentation filter residue, under nitrogen protection, adsorbs sour gas
Body, and 65 DEG C are heated to, finally the gas after processing is discharged from tower top, you can complete the place to sulfur-bearing industrial waste gas
Reason.
Comparative example
With the sulfur-bearing industrial waste gas processing method of Shanghai company as a comparison case
By the sulfur-bearing industrial waste gas processing method progressive in sulfur-bearing industrial waste gas processing method produced by the present invention and comparative example
It can detect, testing result is as shown in table 1：
1st, method of testing：
Air quality standard GB is pressed in air pollution index API tests：3095 standard is detected；
H in toxin expelling tower tail gas2S contents are detected with sub-methyl blue spectrum analysis,《Emission standard for odor pollutants》In
Secondary standard limit value 21kg/h；
CS in toxin expelling tower tail gas2Content is detected with diethylamine AAS,《Emission standard for odor pollutants》
(GB14554-93) the secondary standard limit value 97kg/h in.
Table 1
Note：It is acceptable level, to Health Impact unobvious when API values are less than 32；When reaching 50, chronic respiratory can be made
Tract disease patient symptom is aggravated；When reaching 100, there is serious threat to heart disease and respiratory disease patient, also have to healthy person
Slight effect；When 50~75, it should give a warning and must take the measure of pollution abatement.
It can be seen from the data of table 1, sulfur-bearing industrial waste gas processing method air pollution index API produced by the present invention is low, empty
Makings amount is good, H in toxin expelling tower tail gas2S contents are less than《Emission standard for odor pollutants》In secondary standard limit value 21kg/h,
And significantly lower than the numerical value in comparative example, CS in toxin expelling tower tail gas2Content is less than《Emission standard for odor pollutants》
(GB14554-93) the secondary standard limit value 97kg/h in, and significantly lower than the numerical value in comparative example, processing side of the invention
Method handles waste gas than good in comparative example, has broad application prospects.
Claims (5)
1. a kind of sulfur-bearing industrial waste gas processing method, it is characterised in that specifically preparation process is：
（1）Weigh 0.5~0.7kg activated carbons to be placed in mortar after grinding, collect sieving active carbon powder, will sieve active powdered carbon
End, which is put into the beaker with 30~50mL salpeter solutions and 20~30mL nickel nitrate solutions, soaks, the sieving activity soaked
Carbon powder, then the sieving active carbon powder soaked with deionized water rinsing, and pH to 6~8 is adjusted, removal is adhered on carbon granule
Powdered carbon and impurity, the activated carbon washed, continue the activated carbon of washing being placed in Muffle kiln roasting, discharge, be modified
Activated carbon；
（2）Potassium dihydrogen phosphate, sodium nitrate, sucrose are mixed to get mixture, then mixture and water are mixed, is made by oneself
Mixed liquor；
（3）Count in parts by weight, weigh respectively and be placed in fermentation tank and stir from preparing active carbon and Self-made mixture mixing, then add
Thiobacillus denitrificans bacteria suspension, it is sealed by fermentation, obtains tunning, fermentation-derived product, remove ferment filtrate, obtains fermentation filter
Slag；
（4）Yellow phosphoric tail gas is first passed through after being condensed in the refrigerator with cooling water, the yellow phosphoric tail gas condensed, then will fermentation
Filter residue is filled in the adsorption layer inside activated carbon adsorber, continues the yellow phosphoric tail gas of condensation being passed through from bottom of towe, by with
Adsorption layer inside the activated carbon adsorber of fermentation filter residue, under nitrogen protection, sulfurous gas, and heat temperature raising are adsorbed, finally
Gas after processing is discharged from tower top, you can complete the processing to sulfur-bearing industrial waste gas.
A kind of 2. sulfur-bearing industrial waste gas processing method according to claim 1, it is characterised in that：Step（1）Described grinds
It is 80~100 mesh sieves to consume time as 16~20min, grinding mesh sieve, and the mass fraction of salpeter solution is 3%, nickel nitrate solution
Mass fraction is 35%, and soak time is 1~2h, and sintering temperature is 500~700 DEG C, and roasting time is 1~2h.
A kind of 3. sulfur-bearing industrial waste gas processing method according to claim 1, it is characterised in that：Step（2）Described phosphorus
Acid dihydride potassium, sodium nitrate, sucrose such as are at the mass ratioes, and whipping temp is 20~30 DEG C, and the mass ratio of mixture and water is 1：3, stir
It is 12~16min to mix the time.
A kind of 4. sulfur-bearing industrial waste gas processing method according to claim 1, it is characterised in that：Step（3）Described presses
Parts by weight meter, 30~40 parts are weighed respectively from preparing active carbon and 16~20 parts of Self-made mixtures and 12~16 parts of bacterial contents
107Cfu/mL thiobacillus denitrificans bacteria suspension, mixing time are 12~16min, and fermentation temperature is 35~45 DEG C, and fermentation time is
7~9 days.
A kind of 5. sulfur-bearing industrial waste gas processing method according to claim 1, it is characterised in that：Step（4）Described stream
Measure as 1.0 × 103m3/ h, the temperature of chilled water is 6~8 DEG C, and condensation time is 4~6min, and filling thickness is 10~20cm, is inhaled
Enclosure temperature is 45~65 DEG C.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109432939A (en) * | 2018-11-06 | 2019-03-08 | 泰州华昊废金属综合利用有限公司 | The exhaust treatment system that Treatment of Metal Surface waste resource recovery utilizes |
| CN111013536A (en) * | 2019-12-26 | 2020-04-17 | 清华大学 | Preparation of medium-temperature renewable hydrogen sulfide adsorbent and circulating desulfurization method thereof |
| CN111330585A (en) * | 2020-03-23 | 2020-06-26 | 鄂尔多斯市瀚博科技有限公司 | Preparation method and application of modified catalyst |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111330585B (en) * | 2020-03-23 | 2023-04-18 | 鄂尔多斯市瀚博科技有限公司 | Preparation method and application of modified catalyst |
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