CN106310893A - Absorption liquid with high hydrogen sulfide removal rate - Google Patents
Absorption liquid with high hydrogen sulfide removal rate Download PDFInfo
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- CN106310893A CN106310893A CN201510338106.7A CN201510338106A CN106310893A CN 106310893 A CN106310893 A CN 106310893A CN 201510338106 A CN201510338106 A CN 201510338106A CN 106310893 A CN106310893 A CN 106310893A
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Abstract
The invention relates to an absorption liquid with a high hydrogen sulfide removal rate, and belongs to the technical field of recovery of hydrogen and sulfur through decomposition of hydrogen sulfide. The absorption liquid is an acidic solution system adopting Fe<3+>/Fe<2+> as an intermediate circulation agent and Zn<2+>, Cu<2+> or Ca<2+> as a capture agent. The absorption liquid containing micro-molecular inorganic compounds as components has good chemical stability, and has no degradation failure problem; adoption of Zn<2+>, Cu<2+> or Ca<2+> as the capture agent makes the hydrogen sulfide absorption speed be fast; and the absorption liquid allows the content range of hydrogen sulfide in raw gas to be wide (2-95%), and has good selectivity.
Description
Technical field
The present invention relates to a kind of absorbing liquid with high hydrogen sulfide removal efficiency, belong to by hydrogen sulfide recovery hydrogen and the skill of sulfur
Art field.
Background technology
Hydrogen sulfide (H2S) it is a kind of colourless toxic and harmful having rotten egg abnormal smells from the patient, occurs mainly with various industrial processes
In, its existence not only can cause oil, letter shoot road and the corrosion of equipment and catalyst poisoning, and pollutes the environment, sternly
Heavily threaten that the mankind's is healthy.Therefore, hydrogen sulfide waste gas process problem increasingly comes into one's own.At present, hydrogen sulfide prepare
The sulfur yield obtained accounts for about the 70% of domestic sulfur total output, and most sulfur uses claus process to produce, first
With weakly alkaline organic amine, the hydrogen sulfide in sour gas carried out absorbing and removing, and more highly concentrated to obtain by steam stripping regeneration organic amine
The hydrogen sulfide of degree, is then sulfur dioxide by a part of Oxidation of Hydrogen Sulfide, then by sulfur dioxide and hydrogen sulfide water generation reaction and sulfur
Sulphur.Although this technique has reclaimed the sulfur in hydrogen sulfide, but protium is not utilized effectively.Accordingly, it would be desirable to exploitation a kind of by
Hydrogen sulfide hydrogen making and the new technique of sulfur, while Recovered sulphur, it is provided that a kind of method of hydrogen making, produces to petrochemical industry
Industry provides high-quality hydrogen source, reaches effective utilization of resource, to reduce the consumption of lighter hydrocarbons and natural gas hydrogen preparation.
Existing preparing hydrogen by decomposing hydrogen sulfide and sulfur technique mainly have thermochemical method, photocatalytic method and electrochemical process three kinds.Wherein,
Thermochemical method is divided into direct thermal decomposition method and catalytic decomposition method, and electrochemical process is divided into again direct electrolysis method and Indirect Electro solution.Directly
Connect electrolysis less energy intensive, segregative crystalloid sulfur can be generated, but sulfur can be deposited on electrode surface in a large number, causes sun
The passivation of pole, makes be greatly lowered electrode life.
In order to avoid this problem, Japanese scholars proposes in the eighties makees, by soluble ferric iron salt, the sulfur that highly acid desulfurizing agent is representative
Changing hydrogen desulfurization process for making hydrogen, the method is referred to as Indirect Electro solution, the most in acid condition, utilizes a kind of intercycle agent (oxygen
Change reducing agent, mostly be Fe3+/Fe2+Absorbing liquid) by hydrogen sulfide absorption and be oxidized to sulfur, again absorbing liquid is sent after isolating sulfur
Enter the anode electrolysis regeneration of electrolysis bath, recycled.Meanwhile, H+The moon is entered through ion exchange membrane by the anode of electrolysis bath
Pole, produces hydrogen (such as Japan Patent Recovering method for hydrogen, the patent No.: JPS56146883 at catholyte
(A) report).The method has obtained relatively in-depth study, Japan Patent (Method in the eighties to the nineties in Japan
For recovering hydrogen from hydrogen sulfide, the patent No.: JPH04329887 (A)) on the basis of forefathers study
A large amount of improvement is done in whole technological process so that this technique steps again to industrial applications and goes a step further.
China University Of Petroleum Beijing in last century late nineteen eighties carried out the research to this technique, Yu Ying etc. discloses a kind of from hydrogen sulfide
Recovered sulphur and the method (application number: 2006100580638) of hydrogen making while of in gas: by oxidoreduction and electrolytic regeneration phase
In conjunction with double response systems be applied to indirect electrolytic hydrogen sulfide during, make whole process achieve continuous operation, it is right to improve
The utilization rate of hydrogen sulfide resource, and avoid the difficult problem encountered in tradition sulfur method to a certain extent, in Technology
There is feasibility.Absorption and oxidation technology to hydrogen sulfide at present, many employing one-component Fe3+/Fe2+As absorbing liquid, but
In some condition, as undesirable to absorption rate and the absorbance of hydrogen sulfide in contained the absorbent of one-component under room temperature, this not only can
Affect subsequent reactions, improve the reaction conditions such as temperature and also can increase corresponding energy consumption, bring tired to the industrial applications of technique
Difficult.
Summary of the invention
For the deficiencies in the prior art, it is an object of the invention to provide a kind of absorbing liquid with high hydrogen sulfide removal efficiency, chemistry is steady
Qualitative good, infiltration rate is fast, selectivity good.
The absorbing liquid with high hydrogen sulfide removal efficiency of the present invention, for Fe3+/Fe2+Make intercycle agent, with Zn2+、Cu2+
Or Ca2+Make the acid solution system of agent for capturing.
In described acid solution system, the complex ion of cation is Cl-Or SO4 2-.In the non-setting premise of agent for capturing cation
The lower type determining complex ion and acid.
Wherein,
Fe in absorbing liquid3+Concentration be 0.2-1.0mol/L, preferably 0.6mol/L.Fe3+Content is higher, the sulfur capacity of absorbing liquid
Relatively big, this can reduce the power consumption of doctor solution circulation.
Fe in absorbing liquid2+Concentration be 0.2-1.0mol/L, preferably 0.5mol/L.
In described acid solution system, H+Concentration be 1-10mol/L.
Agent for capturing Zn2+、Cu2+Or Ca2+Concentration be Fe3+The 5-15% of concentration, the addition of agent for capturing makes hydrogen sulfide be absorbed
Speed faster.
The application conditions of described absorbing liquid: pressure is normal pressure, temperature is 20-50 DEG C.With the operation of the most conventional 50-80 DEG C
Temperature is compared, and simplifies the technological process of oxidative absorption process, reduces the acid absorption reaction system corrosivity to device, from
And reduce corresponding input cost and equipment loss.Described absorbing liquid selectivity is good, it is possible to for the volumetric concentration of hydrogen sulfide
Sour gas for 2%-95%.The carbon dioxide coexisted with hydrogen sulfide and hydrocarbon gas will not produce shadow to the absorbability of absorbing liquid
Ring.
Absorbing liquid of the present invention is used for oxidative absorption process, and this process is whole hydrogen sulfide indirect electrolytic hydrogen and sulfur work
The initial step of skill, this step is most important for the enforcement smoothly of whole technological process.Therefore, the exploitation of efficient absorption liquid is
Hydrogen sulfide indirect electrolytic technique realizes one of industrialized key factor.
The absorbing liquid with high hydrogen sulfide removal efficiency of the present invention, the device of indirect electrolytic hydrogen and sulfur includes absorbing instead
Answer device, sulphur separator, electrolysis reactor and knockout drum, absorb reactor by pipeline with sulphur separator, electrolysis instead
Device, knockout drum is answered to be sequentially connected；Wherein, gas-liquid separation pot bottom is connected with the negative electrode of electrolysis reactor also by pipeline,
The anode of electrolysis reactor is connected with absorbing reactor also by pipeline.
During work, the described absorbing liquid with high hydrogen sulfide removal efficiency joins in absorption reactor, will contain under certain flow rate
The sour gas of hydrogen sulfide is sent into and is absorbed reactor, and hydrogen sulfide meets with absorbing liquid in absorbing reactor, part S2-With absorbing liquid
In agent for capturing cation Zn2+、Cu2+Or Ca2+Reaction generates sulfide ZnS, CuS or CaS, part S2-By Fe3+Oxidation
Generate sulfur (elemental sulfur), Fe simultaneously3+It is also reduced to Fe2+.Unreacted hydrogen sulfide gas is entered tail by absorbing reactor top
Gas recovery system, reacted liquid is (rich in Fe2+, H+And S) it is admitted to sulphur separator, after isolating sulfur, contain
H+And Fe2+Reactant liquor (liquid to be regenerated) be sent to the anode of electrolysis reactor, Fe2+It is oxidized to Fe at anode3+, then sent
Resorption is received reactor cycles and is used, H+Then enter negative electrode through the ion exchange membrane electrolyzer anode and cathode and be reduced to H2, enter
Enter knockout drum top and carry out gas-liquid separation, the H of isolated2Hydrogen gas tank is entered by knockout drum top, isolated
Liquid is returned to electrolysis reactor negative electrode by gas-liquid separation pot bottom.
In described device, reaction is as follows:
Absorb in reactor:
When agent for capturing is Zn2+Time,
Zn2++H2S=ZnS ↓+2H+ (1)
2Fe3++H2S=2Fe2++2H++S↓ (2)
2Fe3++ ZnS=2Fe2++Zn2++S↓ (3)
When agent for capturing is Cu2+Time,
Cu2++H2S=CuS ↓+2H+ (1)
2Fe3++H2S=2Fe2++2H++S↓ (2)
2Fe3++ CuS=2Fe2++Cu2++S↓ (3)
When agent for capturing is Ca2+Time,
Ca2++H2S=CaS ↓+2H+ (1)
2Fe3++H2S=2Fe2++2H++S↓ (2)
2Fe3++ CaS=2Fe2++Ca2++S↓ (3)
In electrolysis reactor:
Anode: 2Fe2+=2Fe3++2e (4)
Negative electrode: 2H++ 2e=H2↑ (5)
Electrolysis reactor overall reaction: 2Fe2++2H+=2Fe3++H2↑ (6)
The overall reaction of whole process: H2S=S ↓+H2↑ (7)
Oxidative absorption process in absorbing reactor, is entered the hydrogen sulfide of liquid phase or by reaction equation (1) and agent for capturing by gas phase
Cation Zn2+、Cu2+And Ca2+Reaction generates ZnS, CuS and CaS sulfides, or by reaction equation (2) and Fe3+Instead
Should generate sulfur, thus ensure that absorb course of reaction quickly carry out and the degree completely that can reach (i.e. ensure that absorption
Liquid is to the high absorption rate of hydrogen sulfide and absorbance).Fe3+It is a kind of well oxidant, can will suspend under appropriate conditions
Sulfide-oxidation be elemental sulfur (reaction equation (3)), thus ensure that hydrogen sulfide has higher conversion ratio.
In sum, beneficial effects of the present invention is as follows:
(1) liquid absorption element is little molecule inorganic compound, and chemical stability is good, there is not degraded Problem of Failure, follows whole
During ring uses, loss is little.
(2) absorbing liquid adds Zn2+、Cu2+Or Ca2+Make agent for capturing so that the absorbed speed of hydrogen sulfide faster, and
Fe3+Content is high, therefore the sulfur capacity of absorbing liquid is relatively big, and this can reduce the power consumption of doctor solution circulation.
(3) absorbing liquid requires wider (2%-95%) to the content range of hydrogen sulfide in unstripped gas, and selectivity is good, with hydrogen sulfide altogether
The carbon dioxide deposited and hydrocarbon gas will not produce impact to the absorption of system.
Accompanying drawing explanation
Fig. 1 is hydrogen sulfide indirect electrolytic hydrogen and sulfur process unit schematic diagram；
In figure: 1-absorbs reactor；2-sulphur separator；3-anode；4-electrolysis reactor；5-negative electrode；6-knockout drum.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described.
The all raw materials used in embodiment, in addition to specified otherwise, are commercial.
Embodiment 1-3
Fe in absorbing liquid3+Concentration be 0.6mol/L, Fe2+Concentration be 0.5mol/L, H+The concentration of (HCl system) be 6mol/L,
Agent for capturing ion concentration is Fe3+The 5% of concentration, i.e. 0.03mol/L.Absorbing reaction is normal pressure, and operation temperature is 20 DEG C.With
H in the sour gas processed2S volumetric concentration is 80%, with the tail gas discharged during record enters the sour gas absorbing reactor respectively
The content of middle hydrogen sulfide, calculates the absorbance (%) of hydrogen sulfide.
Embodiment 1-3 uses identical technique, and the agent for capturing not the most being both employing is different: the agent for capturing that embodiment 1 uses
Ion is Zn2+, the agent for capturing ion that embodiment 2 uses is Cu2+, the agent for capturing ion that embodiment 3 uses is Ca2+。
Experiment shows, is separately added into Zn in absorbing liquid2+、Cu2+And Ca2+When making agent for capturing, the absorbance of hydrogen sulfide is respectively
98.2%, 98.4% and 97.5%.
Embodiment 4-6
Fe in absorbing liquid3+Concentration be 0.6mol/L, Fe2+Concentration be 0.5mol/L, H+The concentration of (HCl system) be 6mol/L,
Agent for capturing ion concentration is Fe3+The 10% of concentration, i.e. 0.06mol/L.Absorbing reaction is normal pressure, and operation temperature is 20 DEG C.With
H in the sour gas processed2S volumetric concentration is 80%, with the tail gas discharged during record enters the sour gas absorbing reactor respectively
The content of middle hydrogen sulfide, calculates the absorbance (%) of hydrogen sulfide.
Embodiment 4-6 uses identical technique, and the agent for capturing not the most being both employing is different: the agent for capturing that embodiment 4 uses
Ion is Zn2+, the agent for capturing ion that embodiment 5 uses is Cu2+, the agent for capturing ion that embodiment 6 uses is Ca2+。
Experiment shows, is separately added into Zn in absorbing liquid2+、Cu2+And Ca2+Make agent for capturing, the absorbance of hydrogen sulfide is respectively
99.8%, 99.8% and 99.7%.
Embodiment 7-9
Fe in absorbing liquid3+Concentration be 0.6mol/L, Fe2+Concentration be 0.5mol/L, H+The concentration of (HCl system) be 6mol/L,
Agent for capturing ion concentration is Fe3+The 15% of concentration, i.e. 0.09mol/L.Absorbing reaction is normal pressure, and operation temperature is 20 DEG C.With
H in the sour gas processed2S volumetric concentration is 80%, with the tail gas discharged during record enters the sour gas absorbing reactor respectively
The content of middle hydrogen sulfide, calculates the absorbance (%) of hydrogen sulfide.
Embodiment 7-9 uses identical technique, and the agent for capturing not the most being both employing is different: the agent for capturing that embodiment 7 uses
Ion is Zn2+, the agent for capturing ion that embodiment 8 uses is Cu2+, the agent for capturing ion that embodiment 9 uses is Ca2+。
Experiment shows, is separately added into Zn in absorbing liquid2+、Cu2+And Ca2+Make agent for capturing, the absorbance of hydrogen sulfide is respectively
99.8%, 99.8% and 99.8%.
Embodiment 10-12
In absorbing liquid, the concentration of each component is with embodiment 1-3.Absorbing reaction is normal pressure, and operation temperature is 30 DEG C.For process
H in sour gas2S volumetric concentration is 80%, with hydrogen sulfide in the tail gas discharged during record enters the sour gas absorbing reactor respectively
Content, calculate hydrogen sulfide absorbance (%).
Embodiment 10-12 uses identical technique, and the agent for capturing not the most being both employing is different: the seizure that embodiment 10 uses
Agent ion is Zn2+, the agent for capturing ion that embodiment 11 uses is Cu2+, the agent for capturing ion that embodiment 12 uses is Ca2+。
Experiment shows, is separately added into Zn in absorbing liquid2+、Cu2+And Ca2+Make agent for capturing, the absorbance of hydrogen sulfide is respectively
98.3%, 98.2% and 97.7%.
Embodiment 13-15
In absorbing liquid, the concentration of each component is with embodiment 4-6.Absorbing reaction is normal pressure, and operation temperature is 30 DEG C.For process
H in sour gas2S volumetric concentration is 80%, with hydrogen sulfide in the tail gas discharged during record enters the sour gas absorbing reactor respectively
Content, calculate hydrogen sulfide absorbance (%).
Embodiment 13-15 uses identical technique, and the agent for capturing not the most being both employing is different: the seizure that embodiment 13 uses
Agent ion is Zn2+, the agent for capturing ion that embodiment 14 uses is Cu2+, the agent for capturing ion that embodiment 15 uses is Ca2+。
Experiment shows, is separately added into Zn in absorbing liquid2+、Cu2+And Ca2+Make agent for capturing, the absorbance of hydrogen sulfide is respectively
99.9%, 99.9% and 99.9%.
Embodiment 16-18
In absorbing liquid, the concentration of each component is with embodiment 7-9.Absorbing reaction is normal pressure, and operation temperature is 30 DEG C.For process
H in sour gas2S volumetric concentration is 80%, with hydrogen sulfide in the tail gas discharged during record enters the sour gas absorbing reactor respectively
Content, calculate hydrogen sulfide absorbance (%).
Embodiment 16-18 uses identical technique, and the agent for capturing not the most being both employing is different: the seizure that embodiment 16 uses
Agent ion is Zn2+, the agent for capturing ion that embodiment 17 uses is Cu2+, the agent for capturing ion that embodiment 18 uses is Ca2+。
Experiment shows, is separately added into Zn in absorbing liquid2+、Cu2+And Ca2+Make agent for capturing, the absorbance of hydrogen sulfide is respectively
99.9%, 99.8% and 99.9%.
Embodiment 19-21
In absorbing liquid, the concentration of each component is with embodiment 1-3.Absorbing reaction is normal pressure, and operation temperature is 40 DEG C.For process
H in sour gas2S volumetric concentration is 80%, with hydrogen sulfide in the tail gas discharged during record enters the sour gas absorbing reactor respectively
Content, calculate hydrogen sulfide absorbance (%).
Embodiment 19-21 uses identical technique, and the agent for capturing not the most being both employing is different: the seizure that embodiment 19 uses
Agent ion is Zn2+, the agent for capturing ion that embodiment 20 uses is Cu2+, the agent for capturing ion that embodiment 21 uses is Ca2+。
Experiment shows, is separately added into Zn in absorbing liquid2+、Cu2+And Ca2+Make agent for capturing, the absorbance of hydrogen sulfide is respectively
98.7%, 98.6% and 97.9%.
Embodiment 22-24
In absorbing liquid, the concentration of each component is with embodiment 4-6.Absorbing reaction is normal pressure, and operation temperature is 40 DEG C.For process
H in sour gas2S volumetric concentration is 80%, with hydrogen sulfide in the tail gas discharged during record enters the sour gas absorbing reactor respectively
Content, calculate hydrogen sulfide absorbance (%).
Embodiment 22-24 uses identical technique, and the agent for capturing not the most being both employing is different: the seizure that embodiment 22 uses
Agent ion is Zn2+, the agent for capturing ion that embodiment 23 uses is Cu2+, the agent for capturing ion that embodiment 24 uses is Ca2+。
Experiment shows, is separately added into Zn in absorbing liquid2+、Cu2+And Ca2+Make agent for capturing, the absorbance of hydrogen sulfide is respectively
99.8%, 99.9% and 99.9%.
Embodiment 25-27
In absorbing liquid, the concentration of each component is with embodiment 7-9.Absorbing reaction is normal pressure, and operation temperature is 40 DEG C.For process
H in sour gas2S volumetric concentration is 80%, with hydrogen sulfide in the tail gas discharged during record enters the sour gas absorbing reactor respectively
Content, calculate hydrogen sulfide absorbance (%).
Embodiment 25-27 uses identical technique, and the agent for capturing not the most being both employing is different: the seizure that embodiment 25 uses
Agent ion is Zn2+, the agent for capturing ion that embodiment 26 uses is Cu2+, the agent for capturing ion that embodiment 27 uses is Ca2+。
Experiment shows, is separately added into Zn in absorbing liquid2+、Cu2+And Ca2+Make agent for capturing, the absorbance of hydrogen sulfide is respectively
99.9%, 99.9% and 99.8%.
Embodiment 28-30
In absorbing liquid, the concentration of each component is with embodiment 1-3.Absorbing reaction is normal pressure, and operation temperature is 50 DEG C.For process
H in sour gas2S volumetric concentration is 80%, with hydrogen sulfide in the tail gas discharged during record enters the sour gas absorbing reactor respectively
Content, calculate hydrogen sulfide absorbance (%).
Embodiment 28-30 uses identical technique, and the agent for capturing not the most being both employing is different: the seizure that embodiment 28 uses
Agent ion is Zn2+, the agent for capturing ion that embodiment 29 uses is Cu2+, the agent for capturing ion that embodiment 30 uses is Ca2+。
Experiment shows, is separately added into Zn in absorbing liquid2+、Cu2+And Ca2+Make agent for capturing, the absorbance of hydrogen sulfide is respectively
99.3%, 99.0% and 99.1%.
Embodiment 31-33
In absorbing liquid, the concentration of each component is with embodiment 4-6.Absorbing reaction is normal pressure, and operation temperature is 50 DEG C.For process
H in sour gas2S volumetric concentration is 80%, with hydrogen sulfide in the tail gas discharged during record enters the sour gas absorbing reactor respectively
Content, calculate hydrogen sulfide absorbance (%).
Embodiment 31-33 uses identical technique, and the agent for capturing not the most being both employing is different: the seizure that embodiment 31 uses
Agent ion is Zn2+, the agent for capturing ion that embodiment 32 uses is Cu2+, the agent for capturing ion that embodiment 33 uses is Ca2+。
Experiment shows, is separately added into Zn in absorbing liquid2+、Cu2+And Ca2+Make agent for capturing, the absorbance of hydrogen sulfide is respectively
99.8%, 99.9% and 99.9%.
Embodiment 34-36
In absorbing liquid, the concentration of each component is with embodiment 7-9.Absorbing reaction is normal pressure, and operation temperature is 50 DEG C.For process
H in sour gas2S volumetric concentration is 80%, with hydrogen sulfide in the tail gas discharged during record enters the sour gas absorbing reactor respectively
Content, calculate hydrogen sulfide absorbance (%).
Embodiment 34-36 uses identical technique, and the agent for capturing not the most being both employing is different: the seizure that embodiment 34 uses
Agent ion is Zn2+, the agent for capturing ion that embodiment 35 uses is Cu2+, the agent for capturing ion that embodiment 36 uses is Ca2+。
Experiment shows, is separately added into Zn in absorbing liquid2+、Cu2+And Ca2+Make agent for capturing, the absorbance of hydrogen sulfide is respectively
99.9%, 99.9% and 99.9%.
Comparative example
Fe in absorbing liquid3+Concentration be 0.6mol/L, Fe2+Concentration be 0.5mol/L, H+The concentration of (HCl system) is 6mol/L.
Absorbing reaction is normal pressure, and operation temperature is 30 DEG C.H in the sour gas processed2S volumetric concentration is 80%, record respectively
In the tail gas entering in the sour gas of absorption reactor and discharge, the content of hydrogen sulfide, calculates the absorbance (%) of hydrogen sulfide, tests table
Bright, only comprise Fe3+/Fe2+Absorbing liquid to the absorbance of hydrogen sulfide between 95.2%-97.5%.
Operation temperature be 30 DEG C under the conditions of test result indicate that: with containing only Fe3+/Fe2+The absorbing liquid of one-component is compared, and catches
Agent Zn2+、Cu2+And Ca2+Addition substantially increase the absorbance to hydrogen sulfide, and absorbance is along with the increasing of agent for capturing addition
Add and increase, when the concentration of agent for capturing is by Fe3+The 5% of concentration when bringing up to 10%, and the absorbance of hydrogen sulfide significantly increases, and by
10% when bringing up to 15%, and the absorbance of hydrogen sulfide increases limitation.Therefore, Zn2+、Cu2+And Ca2+Concentration can select
It is selected as Fe3+About the 10% of concentration.
Table 1 is Zn2+、Cu2+Or Ca2+Concentration be Fe3+Concentration 10% time, at a temperature of different operating, absorbing liquid is to hydrogen sulfide
Absorbance (%).From the data in table, rise high-temperature and be conducive to the absorption of hydrogen sulfide, this is because this process belongs to fast
The MODEL OF CHEMICAL ABSORPTION PROCESS of speed, absorption rate is controlled by diffusion mass transfer speed, and temperature raises and is conducive to the hydrogen sulfide in gas phase and liquid
The diffusion of mutually middle metal ion, and chemical reaction process accelerated, so temperature raises the absorption be conducive to hydrogen sulfide.
But after temperature is increased to 30 DEG C, hydrogen sulfide absorption rate is with the increase limitation of temperature, therefore, operation temperature selects 30 DEG C
, it is more or less the same with room temperature, such that it is able to omit the heating device of device.
The absorbing liquid absorbance (%) to hydrogen sulfide under table 1 different temperatures
Claims (10)
1. an absorbing liquid with high hydrogen sulfide removal efficiency, it is characterised in that: for Fe3+/Fe2+Make intercycle agent, with
Zn2+、Cu2+Or Ca2+Make the acid solution system of agent for capturing.
The absorbing liquid with high hydrogen sulfide removal efficiency the most according to claim 1, it is characterised in that: in acid solution system,
The complex ion of cation is Cl-Or SO4 2-。
The absorbing liquid with high hydrogen sulfide removal efficiency the most according to claim 1, it is characterised in that: Fe in absorbing liquid3+
Concentration be 0.2-1.0mol/L.
The absorbing liquid with high hydrogen sulfide removal efficiency the most according to claim 3, it is characterised in that: Fe in absorbing liquid3+
Concentration be 0.6mol/L.
The absorbing liquid with high hydrogen sulfide removal efficiency the most according to claim 1, it is characterised in that: Fe in absorbing liquid2+
Concentration be 0.2-1.0mol/L.
The absorbing liquid with high hydrogen sulfide removal efficiency the most according to claim 5, it is characterised in that: Fe in absorbing liquid2+
Concentration be 0.5mol/L.
The absorbing liquid with high hydrogen sulfide removal efficiency the most according to claim 1, it is characterised in that: in acid solution system,
H+Concentration be 1-10mol/L.
The absorbing liquid with high hydrogen sulfide removal efficiency the most according to claim 1, it is characterised in that: the concentration of agent for capturing is
Fe3+The 5-15% of concentration.
The absorbing liquid with high hydrogen sulfide removal efficiency the most according to claim 1, it is characterised in that: the application bar of absorbing liquid
Part: pressure is normal pressure, temperature is 20-50 DEG C.
The absorbing liquid with high hydrogen sulfide removal efficiency the most according to claim 1, it is characterised in that: can be used in sulfuration
The volumetric concentration of hydrogen is the sour gas of 2%-95%.
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| CN109381978A (en) * | 2017-08-02 | 2019-02-26 | 中国石油化工股份有限公司 | Efficient absorption liquid for indirect electrolytic hydrogen sulfide |
| CN110734043A (en) * | 2019-11-18 | 2020-01-31 | 中国石油大学(北京) | Method for recovering sulfur from gas containing hydrogen sulfide and preparing hydrogen simultaneously |
| CN114210175A (en) * | 2021-12-13 | 2022-03-22 | 中国科学院大连化学物理研究所 | Mixed solution, preparation method thereof and application thereof in absorbing hydrogen sulfide |
| CN114210175B (en) * | 2021-12-13 | 2023-01-31 | 中国科学院大连化学物理研究所 | Mixed solution, preparation method thereof and application thereof in absorbing hydrogen sulfide |
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