CN109261123A - A kind of preparation method of composite modified activated carbon desulphurization agent - Google Patents

A kind of preparation method of composite modified activated carbon desulphurization agent Download PDF

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Publication number
CN109261123A
CN109261123A CN201811254272.9A CN201811254272A CN109261123A CN 109261123 A CN109261123 A CN 109261123A CN 201811254272 A CN201811254272 A CN 201811254272A CN 109261123 A CN109261123 A CN 109261123A
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active carbon
activated carbon
preparation
holding
ferrous sulfate
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杨晶晶
仝雪城
金凤琪
张天喜
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Tianjin Puritech Materials Co Ltd
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Tianjin Puritech Materials Co Ltd
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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
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8603—Removing sulfur compounds
    • B01D53/8606—Removing sulfur compounds only one sulfur compound other than sulfur oxides or hydrogen sulfide
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8603—Removing sulfur compounds
    • B01D53/8609—Sulfur oxides
    • 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
    • B01J20/0225—Compounds of Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt
    • B01J20/0229—Compounds of Fe
    • 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
    • B01J20/0281—Sulfates of compounds other than those provided for in B01J20/045
    • 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
    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/74—Iron group metals
    • B01J23/745—Iron
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/112—Metals or metal compounds not provided for in B01D2253/104 or B01D2253/106
    • 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
    • B01D2257/302—Sulfur oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2220/00—Aspects relating to sorbent materials
    • B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
    • B01J2220/48—Sorbents characterised by the starting material used for their preparation
    • B01J2220/4806—Sorbents characterised by the starting material used for their preparation the starting material being of inorganic character
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2220/00—Aspects relating to sorbent materials
    • B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
    • B01J2220/48—Sorbents characterised by the starting material used for their preparation
    • B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
    • B01J2220/4825—Polysaccharides or cellulose materials, e.g. starch, chitin, sawdust, wood, straw, cotton
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/101—Sulfur compounds

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Abstract

The present invention relates to a kind of preparation methods of composite modified activated carbon desulphurization agent.Include the following steps, 1) A walnut shell cleaned, drying, crush after with liquor zinci chloridi according to solid-liquid ratio be 1:(4~5) g/ml is mixed；B is placed in 250~280 DEG C of 1~1.5h of holding in Muffle furnace, then 500~550 DEG C of 0.5~1h of holding；C distillation water washing dries, is ground to 0.05~0.07mm；2) it is 1:(15~20 according to solid-liquid ratio by active carbon and the concentrated sulfuric acid) g/ml mixing, in 180~230 DEG C of 1~2.5h of holding, is then successively washed, dried, calcination process；3) active carbon of step 2) is added in ferrous sulfate solution, the weight ratio of active carbon and ferrous sulfate is 1:(0.3~0.5), 6~8h is mixed under vacuum conditions, is washed, it is dry.Inventive desulfurization effect is good, high-efficient.

Description

A kind of preparation method of composite modified activated carbon desulphurization agent
Technical field
The present invention relates to activated carbon desulphurization agent preparation technical field more particularly to a kind of composite modified activated carbon desulphurization agents Preparation method.
Background technique
The socio-economic activity of people be unable to do without the energy, and the use of the use of the energy especially coal and petroleum all causes sulphur Discharge.Sulphur largely exists in the environment with oxysulfide, and there are also parts with hydrogen sulfide and organic sulfur (such as mercaptan, thioether, dimethyl sulfide Deng) exist, and the stronger odor pollution of irritation occurs.The major pollutants of sulphur in an atmosphere are sulfur dioxide, sulfur trioxide And sulfate, they are mainly from fossil-fuel-fired, sulphur-bearing ore smelting and sulfuric acid, production of phosphate fertilizer etc..It is main in waste water Amounts of sulphur contaminants is sulfate and hydrogen sulfide, contains a large amount of sulfate in certain acid mine waters.Sulfate in sanitary sewage is a large amount of From human excrement.Sulfate in soil is almost non-degradable, is entered in the surface water and underground water by leaching.Atmosphere In sulfate mainly in the form of particulate solid exist, with precipitation landing or gravitational settling cause into soil or water body Acidification.
The sulphur pollution problem in the whole world annoyings always people, and active carbon has been widely used in sulphur pollution problem now. But single active carbon desulfurization speed, compared with slow, efficiency is lower, in order to improve the performance of active carbon desulfurization, people are one after another to activity Charcoal is modified processing, and modified active carbon can overcome the certain disadvantages and limitation of normal activated carbon, adds in active carbon suitable After modifying agent or activator or after using certain modification technology processing active carbon, its absorption and catalysis effect can be significantly increased Fruit, desulfuration efficiency improve.And conventional method only carries out single modification to active carbon, desulfuration efficiency is not ideal enough.
Summary of the invention
Present invention seek to address that the deficiencies in the prior art, and the composite modified work that a kind of desulfurization effect is good, high-efficient is provided The preparation method of property charcoal desulfurizing agent.
The present invention to achieve the above object, using following technical scheme: a kind of preparation of composite modified activated carbon desulphurization agent Method includes the following steps,
1) prepared by active carbon: include the following steps,
A, walnut shell cleaned, drying, crush after with liquor zinci chloridi according to solid-liquid ratio be 1:(4~5) g/ml mixed Close stirring；
B, 250~280 DEG C of 1~1.5h of holding in Muffle furnace are placed in, then 500~550 DEG C of 0.5~1h of holding；
C, water washing is distilled, dries, be ground to 0.05~0.07mm；
2) activated carbon oxidation: according to solid-liquid ratio being 1:(15~20 by active carbon and the concentrated sulfuric acid) g/ml mixes, 180~ 230 DEG C of 1~2.5h of holding, are then successively washed, are dried, calcination process；
3) activated carbon modified: the active carbon of step 2) is added in ferrous sulfate solution, active carbon and ferrous sulfate Weight ratio is 1:(0.3~0.5), 6~8h is mixed under vacuum conditions, is washed, it is dry.
Preferably: liquor zinci chloridi mass fraction is 30~35%.
Preferably: the maturing temperature of step 2) is 350~380 DEG C, roasts 2~3h.
Preferably: the drying temperature of step 3) is 140~150 DEG C.
Preferably: ferrous sulfate solution concentration is 0.04~0.06mol/L.
The beneficial effects of the present invention are: the active carbon in the present invention is prepared using walnut shell, walnut shell is a kind of fixed carbon With volatile matter content is higher and carbonaceous material that ash content is less, on the one hand can reduce agriculture and forestry organic waste material using walnut shell, reduce On the other hand the wasting of resources also has found new raw materials for production for the preparation of active carbon, save timber and coal resource, alleviates the energy Problem.
Active carbon first passes through the concentrated sulfuric acid and carries out oxidation processes, activated carbon adsorption rate and surface after oxidation processes in the present invention Acid oxygen-containing group amount increases, and the increase of Surface oxygen-containing groups promotes absorption desulfurization, and the active carbon after oxidation is impregnated in sulphur Be modified in sour ferrous iron solution, modified active carbon desulfurization rate further increases, sulfide have lone pair electron, and iron from There is unoccupied orbital outside daughter nucleus, they can produce stronger complexing, form complex compound.The present invention is made by composite modifying method The desulfuration efficiency and effect of active carbon are greatly improved.
Specific embodiment
Below with reference to embodiment, the invention will be further described:
Preparation method of the invention includes the following steps,
1) prepared by active carbon: include the following steps,
A, walnut shell cleaned, drying, crush after with liquor zinci chloridi according to solid-liquid ratio be 1:(4~5) g/ml mixed Close stirring；
B, 250~280 DEG C of 1~1.5h of holding in Muffle furnace are placed in, then 500~550 DEG C of 0.5~1h of holding；
C, water washing is distilled, dries, be ground to 0.05~0.07mm；
2) activated carbon oxidation: according to solid-liquid ratio being 1:(15~20 by active carbon and the concentrated sulfuric acid) g/ml mixes, 180~ 230 DEG C of 1~2.5h of holding, are then successively washed, are dried, calcination process；
3) activated carbon modified: the active carbon of step 2) is added in ferrous sulfate solution, active carbon and ferrous sulfate Weight ratio is 1:(0.3~0.5), 6~8h is mixed under vacuum conditions, is washed, it is dry.
Wherein, liquor zinci chloridi mass fraction is 30~35%.
The drying temperature of step 2) is 100~120 DEG C, and maturing temperature is 350~380 DEG C, roasts 2~3h.
The drying temperature of step 3) is 140~150 DEG C.
Ferrous sulfate solution concentration is 0.04~0.06mol/L.
Embodiment 1,
Preparation method of the invention includes the following steps,
1) prepared by active carbon: include the following steps,
A, mix stirring for 1:4.5g/ml according to solid-liquid ratio with liquor zinci chloridi after walnut shell is cleaned, dried, crushed It mixes；
B, 270 DEG C of holding 1.2h in Muffle furnace are placed in, then 540 DEG C of holding 0.8h；
C, water washing is distilled, dries, be ground to 0.06mm；
2) activated carbon oxidation: according to solid-liquid ratio being that 1:18g/ml is mixed by active carbon and the concentrated sulfuric acid, in 200 DEG C of holding 2h, Then it successively washed, dried, calcination process, drying temperature is 100 DEG C, and maturing temperature is 360 DEG C, roasts 2.5h；
3) activated carbon modified: the active carbon of step 2) is added in ferrous sulfate solution, active carbon and ferrous sulfate Weight ratio is 1:0.4, and ferrous sulfate solution concentration is 0.05mol/L, mixes 7h under vacuum conditions, is washed, dry, dry temperature Degree is 145 DEG C.
Embodiment 2,
Preparation method of the invention includes the following steps,
1) prepared by active carbon: include the following steps,
A, mix stirring for 1:5g/ml according to solid-liquid ratio with liquor zinci chloridi after walnut shell is cleaned, dried, crushed It mixes；
B, 250 DEG C of holding 1.5h in Muffle furnace are placed in, then 550 DEG C of holding 0.5h；
C, water washing is distilled, dries, be ground to 0.07mm；
2) activated carbon oxidation: according to solid-liquid ratio being that 1:15g/ml is mixed by active carbon and the concentrated sulfuric acid, in 230 DEG C of holding 1h, Then it successively washed, dried, calcination process, drying temperature is 120 DEG C, and maturing temperature is 350 DEG C, roasts 2h；
3) activated carbon modified: the active carbon of step 2) to be added in ferrous sulfate solution, ferrous sulfate solution concentration is The weight ratio of 0.04mol/L, active carbon and ferrous sulfate is 1:0.3, mixes 6h under vacuum conditions, is washed, dry, dry temperature Degree is 140 DEG C.
Embodiment 3, includes the following steps,
Preparation method of the invention includes the following steps,
1) prepared by active carbon:
A, mix stirring for 1:5g/ml according to solid-liquid ratio with liquor zinci chloridi after walnut shell is cleaned, dried, crushed It mixes；
B, 280 DEG C of holding 1h in Muffle furnace are placed in, then 500 DEG C of holding 1h；
C, water washing is distilled, dries, be ground to 0.05mm；
2) activated carbon oxidation: active carbon and the concentrated sulfuric acid are mixed according to solid-liquid ratio for 1:20g/ml, kept at 180 DEG C Then 2.5h is successively washed, is dried, calcination process, drying temperature is 110 DEG C, and maturing temperature is 380 DEG C, roasts 3h；
3) activated carbon modified: the active carbon of step 2) is added in ferrous sulfate solution, active carbon and ferrous sulfate Weight ratio is 1:0.5, and ferrous sulfate solution concentration is 0.06mol/L, mixes 8h under vacuum conditions, is washed, dry, dry temperature Degree is 150 DEG C.
Embodiment 4, includes the following steps,
Preparation method of the invention includes the following steps,
1) prepared by active carbon:
A, mix stirring for 1:4.5g/ml according to solid-liquid ratio with liquor zinci chloridi after walnut shell is cleaned, dried, crushed It mixes；
B, 260 DEG C of holding 1.4h in Muffle furnace are placed in, then 520 DEG C of holding 0.7h；
C, water washing is distilled, dries, be ground to 0.06mm；
2) activated carbon oxidation: active carbon and the concentrated sulfuric acid are mixed according to solid-liquid ratio for 1:16g/ml, kept at 190 DEG C Then 2.2h is successively washed, is dried, calcination process, drying temperature is 115 DEG C, and maturing temperature is 375 DEG C, roasts 2h；
3) activated carbon modified: the active carbon of step 2) is added in ferrous sulfate solution, active carbon and ferrous sulfate Weight ratio is 1:0.4, mixes 6~8h under vacuum conditions, is washed, dry.
Embodiment 5, includes the following steps,
Preparation method of the invention includes the following steps,
1) prepared by active carbon:
A, it is mixed after walnut shell is cleaned, dried, crushed with liquor zinci chloridi according to solid-liquid ratio for 1:4~5g/ml Stirring；
B, 250~280 DEG C of 1~1.5h of holding in Muffle furnace are placed in, then 500~550 DEG C of 0.5~1h of holding；
C, water washing is distilled, dries, be ground to 0.05~0.07mm；
2) activated carbon oxidation: active carbon and the concentrated sulfuric acid are mixed according to solid-liquid ratio for 1:15~20g/ml, 180~230 DEG C keep 1~2.5h, then successively washed, dried, calcination process；
3) activated carbon modified: the active carbon of step 2) is added in ferrous sulfate solution, active carbon and ferrous sulfate Weight ratio is 1:0.3~0.5, and ferrous sulfate solution concentration is 0.05mol/L, mixes 6h under vacuum conditions, is washed, dry, Drying temperature is 145 DEG C.
Active carbon in the present invention is prepared using walnut shell, and walnut shell is that a kind of fixed carbon and volatile matter content are higher and grey Divide less carbonaceous material, on the one hand can reduce agriculture and forestry organic waste material using walnut shell, reduces the wasting of resources, be on the other hand also The preparation of active carbon has found new raw materials for production, and active carbon prepares unrestricted, saving timber and coal resource, alleviates the energy and asks Topic.
Active carbon first passes through the concentrated sulfuric acid and carries out oxidation processes, activated carbon adsorption rate and surface after oxidation processes in the present invention Acid oxygen-containing group amount increases, and the increase of Surface oxygen-containing groups promotes absorption desulfurization, and the active carbon after oxidation is impregnated in sulphur Be modified in sour ferrous iron solution, modified active carbon desulfurization rate further increases, sulfide have lone pair electron, and iron from There is unoccupied orbital outside daughter nucleus, they can produce stronger complexing, form complex compound.
The present invention is exemplarily described above, it is clear that present invention specific implementation is not subject to the restrictions described above, As long as using the various improvement that the inventive concept and technical scheme of the present invention carry out, or not improved directly apply to other fields It closes, it is within the scope of the present invention.

Claims (5)

1. a kind of preparation method of composite modified activated carbon desulphurization agent, it is characterised in that: include the following steps,
1) prepared by active carbon: include the following steps,
A, walnut shell cleaned, drying, crush after with liquor zinci chloridi according to solid-liquid ratio be 1:(4~5) g/ml mix stirring It mixes；
B, 250~280 DEG C of 1~1.5h of holding in Muffle furnace are placed in, then 500~550 DEG C of 0.5~1h of holding；
C, water washing is distilled, dries, be ground to 0.05~0.07mm；
2) activated carbon oxidation: according to solid-liquid ratio being 1:(15~20 by active carbon and the concentrated sulfuric acid) g/ml mixes, at 180~230 DEG C 1~2.5h is kept, then successively washed, dried, calcination process；
3) activated carbon modified: the active carbon of step 2) to be added in ferrous sulfate solution, the weight of active carbon and ferrous sulfate Than for 1:(0.3~0.5), 6~8h is mixed under vacuum conditions, is washed, it is dry.
2. the preparation method of composite modified activated carbon desulphurization agent according to claim 1, it is characterised in that: liquor zinci chloridi Mass fraction is 30~35%.
3. the preparation method of composite modified activated carbon desulphurization agent according to claim 1, it is characterised in that: the roasting of step 2) Burning temperature is 350~380 DEG C, roasts 2~3h.
4. the preparation method of composite modified activated carbon desulphurization agent according to claim 1, it is characterised in that: step 3) is done Dry temperature is 140~150 DEG C.
5. the preparation method of composite modified activated carbon desulphurization agent according to claim 1, it is characterised in that: ferrous sulfate is molten Liquid concentration is 0.04~0.06mol/L.
CN201811254272.9A 2018-10-26 2018-10-26 A kind of preparation method of composite modified activated carbon desulphurization agent Pending CN109261123A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114749164A (en) * 2022-04-20 2022-07-15 江苏美亚科泽过滤技术有限公司 Preparation method of sulfur dioxide and hydrogen sulfide gas adsorbent
CN117326542A (en) * 2023-09-27 2024-01-02 南京农业大学 Preparation method of composite modified cow dung biochar, product and application thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114749164A (en) * 2022-04-20 2022-07-15 江苏美亚科泽过滤技术有限公司 Preparation method of sulfur dioxide and hydrogen sulfide gas adsorbent
CN117326542A (en) * 2023-09-27 2024-01-02 南京农业大学 Preparation method of composite modified cow dung biochar, product and application thereof

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Application publication date: 20190125