CN116474544A - Desulfurizing method and desulfurizing agent for gas containing hydrogen sulfide - Google Patents
Desulfurizing method and desulfurizing agent for gas containing hydrogen sulfide Download PDFInfo
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- CN116474544A CN116474544A CN202310561776.XA CN202310561776A CN116474544A CN 116474544 A CN116474544 A CN 116474544A CN 202310561776 A CN202310561776 A CN 202310561776A CN 116474544 A CN116474544 A CN 116474544A
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- desulfurizing agent
- hydrogen sulfide
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- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 229910000037 hydrogen sulfide Inorganic materials 0.000 title claims abstract description 69
- 230000003009 desulfurizing effect Effects 0.000 title claims abstract description 66
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 60
- 239000007789 gas Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 23
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 24
- 230000023556 desulfurization Effects 0.000 claims abstract description 24
- 229940058020 2-amino-2-methyl-1-propanol Drugs 0.000 claims abstract description 23
- CBTVGIZVANVGBH-UHFFFAOYSA-N aminomethyl propanol Chemical compound CC(C)(N)CO CBTVGIZVANVGBH-UHFFFAOYSA-N 0.000 claims abstract description 23
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims abstract description 21
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims abstract description 17
- AHXXIYFEJGGBMG-UHFFFAOYSA-N 1-[2-(tert-butylamino)ethoxy]ethanol Chemical compound CC(O)OCCNC(C)(C)C AHXXIYFEJGGBMG-UHFFFAOYSA-N 0.000 claims abstract description 16
- -1 alcohol amine Chemical class 0.000 claims abstract description 15
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000571 coke Substances 0.000 claims abstract description 5
- 239000002737 fuel gas Substances 0.000 claims abstract description 5
- 239000003345 natural gas Substances 0.000 claims abstract description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 32
- 239000001569 carbon dioxide Substances 0.000 claims description 16
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 230000008929 regeneration Effects 0.000 claims description 5
- 238000011069 regeneration method Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 2
- 230000001172 regenerating effect Effects 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- GVIZPQPIQBULQX-UHFFFAOYSA-N carbon dioxide;sulfane Chemical compound S.O=C=O GVIZPQPIQBULQX-UHFFFAOYSA-N 0.000 claims 1
- 230000007423 decrease Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 13
- 238000010521 absorption reaction Methods 0.000 abstract description 7
- 239000003513 alkali Substances 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 238000005273 aeration Methods 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- QMMZSJPSPRTHGB-UHFFFAOYSA-N MDEA Natural products CC(C)CCCCC=CCC=CC(O)=O QMMZSJPSPRTHGB-UHFFFAOYSA-N 0.000 description 4
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 3
- 229910001447 ferric ion Inorganic materials 0.000 description 3
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 3
- PVXVWWANJIWJOO-UHFFFAOYSA-N 1-(1,3-benzodioxol-5-yl)-N-ethylpropan-2-amine Chemical compound CCNC(C)CC1=CC=C2OCOC2=C1 PVXVWWANJIWJOO-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 206010029350 Neurotoxicity Diseases 0.000 description 1
- 206010044221 Toxic encephalopathy Diseases 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007135 neurotoxicity Effects 0.000 description 1
- 231100000228 neurotoxicity Toxicity 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—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
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
-
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
- C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
- C10K1/004—Sulfur containing contaminants, e.g. hydrogen sulfide
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
- C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
- C10K1/005—Carbon dioxide
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
- C10K1/10—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses a desulfurization method and a desulfurizing agent for a gas containing hydrogen sulfide, wherein the desulfurization method comprises the following steps: introducing the gas containing hydrogen sulfide into a desulfurizing agent; the desulfurizer is characterized in that the desulfurizer is prepared from ferric oxide, ethylenediamine tetraacetic acid, tert-butylaminoethoxyethanol, 2-amino-2-methyl-1-propanol and water, wherein the weight ratio of the ferric oxide, ethylenediamine tetraacetic acid, tert-butylaminoethoxyethanol, 2-amino-2-methyl-1-propanol and water is 80-120:160-220:100-150:15-40:400-600. Compared with the traditional alkali liquor absorption method and alcohol amine method, the desulfurizing agent has the characteristic of good removing effect, compared with the dry desulfurization represented by ferric oxide, the desulfurizing agent has the characteristics of repeated recycling of the agent and no secondary pollution and capacity, and compared with the traditional technology, the desulfurizing agent can reduce the treatment cost of each gas by 60 percent and has wide market prospect in the aspects of desulfurization engineering of natural gas, biogas, coke oven gas, fuel gas and the like.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to a desulfurization method and a desulfurizing agent for hydrogen sulfide-containing gas.
Background
Industrial gases such as natural gas, biogas, coke oven gas, fuel gas and the like often contain hydrogen sulfide components, wherein the hydrogen sulfide is a gas which is easy to dissolve in water, the solution is acidic after being dissolved in water, certain corrosiveness is brought to metal, the phenomenon of stress cracking (SSCC) caused by the hydrogen sulfide can be generated under the conditions of high temperature and high pressure, and meanwhile, the hydrogen sulfide is also a highly toxic gas with neurotoxicity. The industrial gas contains hydrogen sulfide gas, which brings great potential safety hazard to safe production, so that sulfur-containing industrial gas needs to be desulfurized.
The current technology for desulfurizing the hydrogen sulfide component in industrial gas is largely divided into dry desulfurization and wet desulfurization. According to the different desulfurization principles, the content of residual hydrogen sulfide after desulfurization is also greatly different. The content of hydrogen sulfide is higher after desulfurization by an alkali liquor neutralization method, and is between 10 milligrams per cubic meter and 100 milligrams per cubic meter, the solution is easy to be penetrated by gas fluctuation, the fluctuation of the content of the purified hydrogen sulfide is larger, the alkali liquor after absorbing the hydrogen sulfide is large, the treatment path is less, and meanwhile, if the gas contains carbon dioxide, the removal rate of the hydrogen sulfide is obviously reduced; the alcohol amine desulfurization can remove hydrogen sulfide to less than 6 milligrams per cubic meter, and most of the hydrogen sulfide is 2-4 milligrams per cubic meter, but the hydrogen sulfide is difficult to remove to less than 1 mg; after dry desulfurization with iron oxide as the main component, the content of hydrogen sulfide can be less than 1 milligram per cubic meter, but most of solid desulfurizing agents used in the method are disposable agents, cannot be recycled, and the waste desulfurizing agents are difficult to treat.
Aiming at the technical problems that the content of the desulfurized hydrogen sulfide is high, the treatment is easily influenced by carbon dioxide, and the desulfurizing agent cannot be reused in the method, the invention aims to realize that the content of the desulfurized hydrogen sulfide is less than 1 milligram per cubic meter, the desulfurizing agent can be repeated, and the hydrogen sulfide is selectively removed.
Disclosure of Invention
Based on the above reasons, the present invention proposes a desulfurization method of a hydrogen sulfide-containing gas and a desulfurizing agent. Specifically, in order to achieve the purpose of the present invention, the present invention adopts the following technical scheme:
one aspect of the present invention relates to a method for desulfurizing a hydrogen sulfide-containing gas, comprising the steps of: introducing the gas containing hydrogen sulfide into a desulfurizing agent; the desulfurizer is characterized in that the desulfurizer is prepared from ferric oxide, ethylenediamine tetraacetic acid, tert-butylaminoethoxyethanol, 2-amino-2-methyl-1-propanol and water, wherein the weight ratio of the ferric oxide, ethylenediamine tetraacetic acid, tert-butylaminoethoxyethanol, 2-amino-2-methyl-1-propanol and water is 80-120:160-220:100-150:15-40:400-600.
In a preferred embodiment of the present invention, the weight ratio of the iron oxide, ethylenediamine tetraacetic acid, t-butylaminoethoxyethanol, 2-amino-2-methyl-1-propanol, and water is 100 to 120:180-200:110-130:30-35:400-600.
In a preferred embodiment of the invention, the hydrogen sulphide containing gas also contains nitrogen and/or carbon dioxide.
In a preferred embodiment of the invention, the hydrogen sulfide-containing gas is natural gas, biogas, coke oven gas or fuel gas.
In a preferred embodiment of the present invention, the content of the desulfurized gas containing hydrogen sulfide is less than 1mg/m 3 。
In a preferred embodiment of the present invention, the method further comprises a step of regenerating the desulfurizing agent by passing air after adsorbing the hydrogen sulfide gas.
In a preferred embodiment of the present invention, the number of times of regeneration of the desulfurizing agent is 2 or more, and the desulfurizing ability and the decarbonation ability of the desulfurizing agent after 2 times of regeneration are 90% or more of those of the newly produced desulfurizing agent, and the desulfurizing and decarbonation means a ratio in which the content of hydrogen sulfide and carbon dioxide-containing gas is reduced after passing through the desulfurizing agent.
The invention also relates to a desulfurizing agent, which is prepared from ferric oxide, ethylenediamine tetraacetic acid, tert-butylaminoethoxyethanol, 2-amino-2-methyl-1-propanol and water, wherein the weight ratio of the ferric oxide to the ethylenediamine tetraacetic acid to the tert-butylaminoethoxyethanol to the 2-amino-2-methyl-1-propanol to the water is 80-120:160-220:100-150:15-40:400-600.
The invention also relates to a preparation method of the desulfurizing agent, which comprises the following steps: mixing ferric oxide, ethylenediamine tetraacetic acid and tert-butylaminoethoxyethanol according to a proportion, adding water as a solvent, heating the mixed solution to 98-100 ℃, gradually adding 2-amino-2-methyl-1-propanol into the mixed solution, stirring the solution, and ending the reaction after all solids in the solution are dissolved to form the alkaline desulfurizing agent containing iron ions.
Advantageous effects
The invention discovers that tert-butylaminoethoxy ethanol has the effect of selectively absorbing hydrogen sulfide and the effect of preferentially absorbing hydrogen sulfide, and after absorbing hydrogen sulfide, the hydrogen sulfide is rapidly oxidized into elemental sulfur through ferric ions, so that the absorption reaction is accelerated, the effect after desulfurization is ensured to be less than 1 milligram per side, the ferric ions are oxidized into ferric ions with oxidability by adopting air, the capability of oxidizing hydrogen sulfide is obtained again, and the repeated recycling of the medicament is realized; meanwhile, 2-amino-2-methyl-1-propanol is added, the substance has stronger carbon dioxide absorption capacity, and the carbon dioxide absorption effect is adjusted by adjusting the addition amount of the substance. Compared with the traditional alkali liquor absorption method and alcohol amine method, the desulfurizing agent has the characteristics of good removing effect, and compared with the dry desulfurization represented by ferric oxide, the desulfurizing agent has the characteristics of repeated recycling of the agent and no secondary pollution and capacity, and compared with the traditional technology, the desulfurizing agent can reduce the treatment cost of each industrial gas by 60 percent or more, and has wide market application prospect in the aspects of desulfurization engineering of natural gas, biogas, coke oven gas, fuel gas and the like.
Detailed Description
In order to further understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Unless otherwise specified, all reagents involved in the examples of the present invention are commercially available products and are commercially available.
Comparative example 1: implementation and effect of absorbing hydrogen sulfide by traditional sodium hydroxide
Conventional sodium hydroxide absorption hydrogen sulfide examples were performed. Sodium hydroxide was formulated into aqueous solutions as follows.
Desulfurizing agent composition
| Component (A) | Dosage of |
| Sodium hydroxide | 300 |
| Water and its preparation method | 700g |
Will contain 100g/m 3 Introducing a mixture of hydrogen sulfide and nitrogen into the desulfurizing agent solution, detecting the content of hydrogen sulfide at an outlet at a flow rate of 200ml/min, and when the content of hydrogen sulfide exceeds 1mg/m 3 Stopping aeration, recording aeration time of 72min, calculating volume of introduced hydrogen sulfide gas of 72min×200 ml/min=14400 ml, and absorbing hydrogen sulfide of 100g/m 3 ×14400ml/1000000＝1.44g。
Comparative example 2: implementation and effect of absorbing hydrogen sulfide by traditional MDEA alcohol amine
Conventional MDEA alcohol amine absorption hydrogen sulfide examples were performed. MDEA was formulated as an aqueous solution as follows.
Desulfurizing agent composition
| Component (A) | Dosage of |
| MDEA | 450 |
| Water and its preparation method | 550g |
Will contain 100g/m 3 Introducing a mixture of hydrogen sulfide and nitrogen into the desulfurizing agent solution, detecting the content of hydrogen sulfide at an outlet at a flow rate of 200ml/min, and when the content of hydrogen sulfide exceeds 1mg/m 3 Stopping the aeration, recording the aeration time to be 80 minutes, calculating the volume of the introduced hydrogen sulfide gas to be 80min×200 ml/min=16000 ml, and the mass of the absorbed hydrogen sulfide to be 100g/m 3 ×16000ml/1000000＝1.60g。
Example 1: implementation and effect of the desulfurizing agent of the invention
Mixing ferric oxide, nitrilotriacetic acid and ethylenediamine tetraacetic acid according to the composition ratio of the desulfurizing agent in the following table, adding water, heating to 98 ℃, stirring at a rotation speed of 100 revolutions per minute, and adding 2-amino-2-methyl-1-propanol at a constant speed within 2 hours to generate the desulfurizing agent.
Desulfurizing agent composition
| Component (A) | Dosage of |
| Iron oxide | 102g |
| Ethylenediamine tetraacetic acid | 190g |
| Tert-butylaminoethoxyethanol (nitrilotriacetic acid) | 124g |
| 2-amino-2-methyl-1-propanol | 33g |
| Water and its preparation method | 550g |
Will contain 100g/m 3 Introducing a mixture of hydrogen sulfide and nitrogen into the desulfurizing agent solution, detecting the content of hydrogen sulfide at an outlet at a flow rate of 200ml/min, and when the content of hydrogen sulfide exceeds 1mg/m 3 Stopping aeration at the time of stopping aeration, recording aeration time as 125 minutes, calculating the volume of the introduced hydrogen sulfide gas as 125min×200 ml/min=25000 ml, and absorbing hydrogen sulfide with a mass of 100g/m 3 ×25000ml/1000000＝2.50g。
As found by the above examples, the desulfurizing agent of the present invention is used in an amount of less than 1mg/m 3 The quality of absorbed hydrogen sulfide is greatly improved compared with the traditional desulfurization method.
Example 2: implementation and effect of absorbing hydrogen sulfide and carbon dioxide by desulfurizing agent
Mixing ferric oxide, nitrilotriacetic acid and ethylenediamine tetraacetic acid according to the composition ratio of the desulfurizing agent in the following table, adding water, heating to 98 ℃, stirring at a rotation speed of 100 revolutions per minute, and adding 2-amino-2-methyl-1-propanol at a constant speed within 2 hours to generate the desulfurizing agent.
Desulfurizing agent composition
| Component (A) | Dosage of |
| Iron oxide | 102g |
| Ethylenediamine tetraacetic acid | 190g |
| Tert-butylaminoethoxyethanol (nitrilotriacetic acid) | 124g |
| 2-amino-2-methyl-1-propanol | 33g |
| Water and its preparation method | 550g |
Will contain 100g/m 3 Introducing a mixture of hydrogen sulfide, 5% carbon dioxide and nitrogen into the desulfurizing agent solution at a flow rate of 200ml/min, detecting the content of hydrogen sulfide and the content of carbon dioxide at an outlet, absorbing for 120min, introducing air (1L/min) for 60 min, repeating the steps for 3 cycles, and detecting the content of the hydrogen sulfide and the content of the carbon dioxide as follows:
example 3: implementation and effect of absorbing hydrogen sulfide and carbon dioxide by desulfurizing agent
Mixing ferric oxide, nitrilotriacetic acid and ethylenediamine tetraacetic acid according to the composition ratio of the desulfurizing agent in the following table, adding water, heating to 98 ℃, stirring at a rotation speed of 100 revolutions per minute, and adding 2-amino-2-methyl-1-propanol at a constant speed within 2 hours to generate the desulfurizing agent.
Desulfurizing agent composition
| Component (A) | Dosage of |
| Iron oxide | 102g |
| Ethylenediamine tetraacetic acid | 190g |
| Tert-butylaminoethoxyethanol (nitrilotriacetic acid) | 124g |
| 2-amino-2-methyl-1-propanol | 20g |
| Water and its preparation method | 563g |
Will contain 100g/m 3 Introducing a mixture of hydrogen sulfide, 5% carbon dioxide and nitrogen into the desulfurizing agent solution at a flow rate of 200ml/min, detecting the content of hydrogen sulfide and carbon dioxide at an outlet, absorbing for 120min, introducing air (1L/min) for 60 min to regenerate the desulfurizing agent, repeating the steps for 3 cycles, and detecting the content of the hydrogen sulfide and the carbon dioxide as follows：
Through the above examples, it was found that the desulfurizing agent of the present invention can recover almost 100% of the desulfurizing and decarbonating properties after air regeneration, and the adjustment of the carbon dioxide absorbing effect can be achieved by adjusting the content of 2-amino-2-methyl-1-propanol.
The foregoing describes preferred embodiments of the present invention, however, it is not intended to limit the invention thereto. Modifications and variations to the embodiments disclosed herein may be made by those skilled in the art without departing from the scope and spirit of the invention.
Claims (10)
1. A method for desulfurizing a hydrogen sulfide-containing gas, comprising the steps of: introducing the gas containing hydrogen sulfide into a desulfurizing agent; the desulfurizer is characterized by being prepared from ferric oxide, ethylenediamine tetraacetic acid, tert-butylaminoethoxyethanol, 2-amino-2-methyl-1-propanol and water, wherein the weight ratio of the ferric oxide, ethylenediamine tetraacetic acid, tert-butylaminoethoxyethanol, 2-amino-2-methyl-1-propanol and water is 80-120:160-220:100-150:15-40:400-600.
2. The desulfurization method according to claim 1, wherein the weight ratio of the iron oxide, ethylenediamine tetraacetic acid, t-butylaminoethoxyethanol, 2-amino-2-methyl-1-propanol and water is 100 to 120:180-200:110-130:30-35:400-600.
3. The desulfurization method according to claim 1, wherein the hydrogen sulfide-containing gas further contains nitrogen and/or carbon dioxide.
4. The desulfurization method according to claim 1, wherein the hydrogen sulfide-containing gas is natural gas, biogas, coke oven gas, or fuel gas.
5. According to claimThe desulfurization method according to claim 1, wherein the content of the desulfurized hydrogen sulfide-containing gas is less than 1mg/m 3 。
6. The desulfurization method according to claim 1, characterized by further comprising a step of regenerating the desulfurizing agent by passing air after adsorbing the hydrogen sulfide gas.
7. The desulfurization method according to claim 6, wherein the number of times of regeneration of the desulfurizing agent is 2 or more, and the desulfurizing ability and the decarbonation ability of the desulfurizing agent after 2 times of regeneration are 90% or more of those of the newly produced desulfurizing agent, the desulfurization and the decarbonation being a ratio in which the content of the hydrogen sulfide-and carbon dioxide-containing gas decreases after passing through the desulfurizing agent.
8. A desulfurizing agent, which is prepared from ferric oxide, ethylenediamine tetraacetic acid, tert-butylaminoethoxyethanol, 2-amino-2-methyl-1-propanol and water, wherein the weight ratio of the ferric oxide, ethylenediamine tetraacetic acid, tert-butylaminoethoxyethanol, 2-amino-2-methyl-1-propanol and water is 80-120:160-220:100-150:15-40:400-600.
9. The desulfurizing agent according to claim 8, wherein the weight ratio of iron oxide, ethylenediamine tetraacetic acid, t-butylaminoethoxyethanol, 2-amino-2-methyl-1-propanol and water is 100 to 120:180-200:110-130:30-35:400-600.
10. The method for producing a desulfurizing agent according to claim 8 or 9, characterized by comprising the steps of: mixing ferric oxide, ethylenediamine tetraacetic acid and tert-butylaminoethoxyethanol according to a proportion, adding water as a solvent, heating the mixed solution to 98-100 ℃, gradually adding 2-amino-2-methyl-1-propanol into the mixed solution, stirring the solution, and ending the reaction after all solids in the solution are dissolved to form the alkaline desulfurizing agent containing iron ions.
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Citations (4)
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|---|---|---|---|---|
| US4036942A (en) * | 1971-07-28 | 1977-07-19 | Rhodia, Inc. | Process for the removal of hydrogen sulfide and mercaptans from liquid and gaseous streams |
| US4278646A (en) * | 1978-03-30 | 1981-07-14 | The Regents Of The University Of California | Oxidative removal of hydrogen sulfide from gaseous streams |
| US5616306A (en) * | 1994-09-27 | 1997-04-01 | Chevron U.S.A. Inc. | Method for removal of hydrogen sulfide from gases |
| CN1887406A (en) * | 2005-06-27 | 2007-01-03 | 成都华西化工研究所 | Solvent for eliminating H2S from gas mixture |
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| US4036942A (en) * | 1971-07-28 | 1977-07-19 | Rhodia, Inc. | Process for the removal of hydrogen sulfide and mercaptans from liquid and gaseous streams |
| US4278646A (en) * | 1978-03-30 | 1981-07-14 | The Regents Of The University Of California | Oxidative removal of hydrogen sulfide from gaseous streams |
| US5616306A (en) * | 1994-09-27 | 1997-04-01 | Chevron U.S.A. Inc. | Method for removal of hydrogen sulfide from gases |
| CN1887406A (en) * | 2005-06-27 | 2007-01-03 | 成都华西化工研究所 | Solvent for eliminating H2S from gas mixture |
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