CN108126660A - A kind of CO based on Immesion active carbon2Solid absorbent, preparation method and its usage - Google Patents
A kind of CO based on Immesion active carbon2Solid absorbent, preparation method and its usage Download PDFInfo
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- CN108126660A CN108126660A CN201810061606.4A CN201810061606A CN108126660A CN 108126660 A CN108126660 A CN 108126660A CN 201810061606 A CN201810061606 A CN 201810061606A CN 108126660 A CN108126660 A CN 108126660A
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- 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
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3214—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the method for obtaining this coating or impregnating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
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- Y02C20/40—Capture or disposal of greenhouse gases of CO2
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Abstract
The present invention provides a kind of CO based on Immesion active carbon2Solid absorbent, preparation method and its usage.The present invention is based on the CO of Immesion active carbon2Solid absorbent, including the following each component of weight proportion：83~95 parts of absorbent charcoal carriers；1~15 part of one or more carbonate or hydroxide containing the Ith A or the IIth A races；The mass transfer accelerating agent that 0~6 part of at least one element containing the Ith A races is formed.The present invention is modified activated carbon processing by infusion process, and one or more carbonate or hydroxide containing the Ith A or the IIth A races are introduced into activated carbon surface and activated carbon CO is made in skeleton2Adsorbent.The present invention is based on the CO of Immesion active carbon2Solid absorbent has adsorption capacity high and good selective.
Description
Technical field
The present invention relates to gas purification and adsorber technologies more particularly to a kind of CO based on Immesion active carbon2Solid is inhaled
Attached dose, preparation method and its usage.
Background technology
CO2Separation has important theory and realistic meaning with capture research.Greenhouse effects are main in the world at present
One of environmental problem, CO2As greenhouse gases, " contribution " to greenhouse effects has been more than 60%.Combustion of fossil fuel is CO2's
Main source.CO2There are many purposes, additive, CO in beer beverage2Fire extinguisher, rain making, stage smog and welding
Protection gas in operation etc., but dosage is limited.In recent years, CO2As the raw material of organic synthesis, for Synthesis of dimethyl carbonate,
The research of the organic matters such as formic acid and methanol gradually increases, especially CO2Hydrogenation is ground for the technique of fuel by more and more
The concern for the person of studying carefully.The Dalian Chemistry and Physics Institute of Chinese Academy of Sciences carbon resource small molecule and Sun Jian, Ge Qingjie researcher of hydrogen utilization innovation team
By designing a kind of novel and multifunctional composite catalyst, CO is realized2Direct hydrogenation produces high-knock rating gasoline.By CO2Gas has
The recycling of effect can not only reduce greenhouse effects, for producing high-octane gasoline etc., reduce to fossil fuel according to
Rely, it will change the energy pattern of All Around The World.
Common CO2Separation has absorption, UF membrane, low temperature distillation, microbial method etc., above-mentioned separation method with catching method
There are still various problems in production application.Some absorbents used in absorption and separation method have toxicity, and can be rotten
Equipment is lost, absorbs CO2Waste liquid can be generated, while regenerative process energy consumption is larger.Membrane separation process is since film is expensive, film is vulnerable to
Pollution and film under certain specific environment using the factors such as can be restricted can not extensive use.Cryogenic distillation process is in order to carry
High separating efficiency needs to improve cooling efficiency using traditional cooling cycle system, promotes CO2Rapid liquefaction, therefore high energy consumption,
It is less economical.Microbial method detaches CO2Although microorganism and algae are to CO2Fixed efficiency it is higher, but cultivate microorganism
It is higher on influence growth factors dictate such as temperature, humidity during with algae, it is not easy large-scale application.
Compared with other isolation technics, adsorption technology has the following advantages：Low energy consumption, product purity is high, technological process letter
List, operating flexibility is big, operating cost is low, maintenance is simple, environmental-friendly.Can be achieved multiple gases separation, to water, sulfide,
The impurity such as ammonia, hydro carbons have stronger tolerance, without complicated pretreatment.High degree of automation, easy to operate, driving and parking is simple
List, device regulating power are strong, are generated almost without " three wastes ", will not cause new environmental pollution.Absorption method carbon dioxide removal
Key is the exploitation and selection of adsorbent.The selection of adsorbent is a challenge, for CO2Adsorbing separation absorption
Agent should have many advantages, such as that adsorption capacity is big, the rate of adsorption is fast, separation factor is big, stability is high, while also to consider adsorbent
Regenerability.
Common physical absorbent includes activated carbon, molecular sieve, metal-organic framework (MOFs) material etc..Activated carbon is used
In CO absorption2, generally to pass through modification.The production cost of carbon fiber, carbon nanotube and carbon aerogels is high, and complex process is not
It is suitble to large-scale application.Molecular sieve CO absorption2Mainly by screening mechanism, the size of molecular sieve bore diameter directly affects CO2Suction
Attached selectivity.And molecular sieve is more than CO to the selectivity of other gases2, therefore to be removed in advance, this is also resulted in
Required equipment volume is big.Metal-organic framework (MOFs) material, at elevated pressures, the gas absorption amount of MOFs is very high,
Under normal pressure, adsorbance will be less than common physical absorbent.
Chinese patent CN106378095A discloses a kind of CO2Adsorbent and preparation method thereof, the adsorbent are by alcohol
Amine compounds carry out the activated carbon of surface modification, and be mainly characterized in that has higher CO at high temperature2Adsorption capacity, absorption are held
It measures as 21.2ml/g.Chinese patent CN200880008357.7 disclose it is a kind of based on activated carbon have high mesoporous and macropore
The preparation method of the adsorbent of rate, the adsorbent be mainly characterized by specific surface area it is very high >=1250m2/ g has high total hole
Rate and high mesoporous and big porosity also have a degree of microporosity.The adsorbent is suitable for purifying air and liquid, also suitable
For or in the food industry, particularly for preparing and/or the food that decolourizes.It may be also used in sorbent filter material.
Chinese patent CN201210336200.5 discloses a kind of preparation method of lithium group carbonic anhydride adsorption agent, and this method is by lithium carbonate
It is mixed with kaolin according to certain molar ratio, lithium base CO is prepared in heating roasting2Adsorbent.The CO prepared with the method2Absorption
Agent carries out CO in thermogravimetric analyzer2It absorbs, maximum absorption capacity is 31.3%.CN201210064995.9 discloses one kind and changes
The preparation method of property microwave activated carbon sorbent, this method is using microwave activity carbon as carrier, alkali metal ion K+As work
Property component be modified, using ultrasonic wave equivalent impregnation prepare.The adsorption capacity of adsorbent obtained is up to 1.72mmol/g,
CO2/CH4Adsorption equilibrium selective factor B be up to 7.42.CN201710177603.2 discloses a kind of CO absorption2N doping
The preparation method of carbon adsorbent, for this method using quick growth poplar wood bark as raw material, nitrogenous compound is nitrogen source, and pure water is solvent, high
After warm high pressure hydrothermal condition processing, dark brown solid product is centrifugally separating to obtain, by the positive leak of brown solid, anhydrous second
Alcohol washs, and high-temperature calcination under nitrogen protection obtains N doping carbon adsorbent.The adsorbent is to CO2Highest saturation adsorptive value be
158mg/g。
In conclusion although some are reported in previous literature for CO2The adsorbent and corresponding purification of absorption or capture
Method, but there are the CO of adsorbent in concrete application2The problems such as removal efficiency is low, adsorption capacity is low, poor selectivity.Although activated carbon
With certain adsorption capacity, but there are still adsorption capacity is low and the problems such as poor selectivity for non-modified processing.Because of adsorption capacity
It is limited, make the dosage of adsorbent and purifier bulky, increase device Meteorological, frequent regeneration also becomes operation
It obtains complicated.On the other hand, adsorptive selectivity is poor, CO absorption2While also adsorb a large amount of N2Or CH4, to adsorption separation efficiency band
To adversely affect.
Invention content
It is an object of the present invention to it is directed to current CO2Solid absorbent there are adsorbent adsorption capacity is low, the rate of adsorption
Low, the problem of adsorptive selectivity is poor, proposes a kind of CO based on Immesion active carbon2Solid absorbent, should be based on Immesion active carbon
CO2Solid absorbent has adsorption capacity high and good selective.
To achieve the above object, the technical solution adopted by the present invention is：A kind of CO based on Immesion active carbon2Solid absorption
Agent, including the following each component of weight proportion：
A) 83~95 parts of absorbent charcoal carriers；
B) 1~15 part of one or more carbonate or hydroxide containing the Ith A or the IIth A races；
C) the mass transfer accelerating agent that 0~6 part of at least one element containing the Ith A races is formed.
Further, the absorbent charcoal carrier for one kind in coaly activated carbon, wood activated charcoal, fruit shell carbon and bamboo charcoal or
Several mixing.
Further, the absorbent charcoal carrier be coaly activated carbon and/or fruit shell carbon, the absorbent charcoal carrier weight proportion
It is 90~95 parts.
Further, the specific surface area of the absorbent charcoal carrier, which is more than, is equal to 240m2/g。
Further, the carbonate is Li2CO3、Na2CO3And K2CO3One or more of mixing, hydroxide be
One or more of LiOH, NaOH and KOH mixing.
Further, the weight proportion of the carbonate is 2~8 parts.
Further, the weight proportion of the mass transfer accelerating agent is 0.1~5 part.
Further, the CO based on Immesion active carbon2Specific surface area >=200m of solid absorbent2/ g, granular size
It is 1700~4800 μm.
Another object of the present invention also discloses a kind of CO based on Immesion active carbon2The preparation side of solid absorbent
Method includes the following steps：
Step 1 weighs one or more carbonate or hydroxide containing the Ith A or the IIth A races, prepares molar concentration
Solution I for 0.1~0.5mol/L；
Step 2 adds in the mass transfer accelerating agent that at least one element containing the Ith A races is formed in above-mentioned solution I, makes
The molar concentration of mass transfer accelerating agent is 0.1~0.5mol/L in solution, names the solution as solution II, in the solution II simultaneously
There are the Ith A or the one or more carbonate or hydroxide and mass transfer accelerating agent of the IIth A races；
Step 3 impregnates absorbent charcoal carrier particle with the solution II prepared in step 2, is immersed under room temperature, normal pressure
It carries out, dries or heating, drying, the CO based on Immesion active carbon is made2Solid absorbent.
Further, in step 1, one or more carbonate containing the Ith A or the IIth A races or hydroxide are prepared
Molar concentration is 0.15~0.25mol/L.
Further, the molar concentration of mass transfer accelerating agent that at least one element containing the Ith A races in step 2 is formed
For 0.15~0.3mol/L.
Further, dipping process is incipient impregnation.
Another object of the present invention also discloses a kind of CO based on Immesion active carbon2Solid absorbent is in CO absorption2Neck
The purposes in domain.
Further, adsorbent before use, in the atmosphere of humidification (relative humidity 50-90%), 3 is anticipated under room temperature
Hour, it is 0~65 DEG C in temperature, pressure is 0~3.0MPa, and relative humidity is 5%~95%, CO2Initial concentration for 0.02~
0.3%, gas volume air speed is 100~10000h-1Under conditions of, containing CO2Gas raw material it is described based on leaching by being filled with
The CO of stain activated carbon2The absorber of solid absorbent is adsorbed, the gas after being purified.
The present invention kind of the CO based on Immesion active carbon2Solid absorbent, preparation method and its usage, compared with prior art
Relatively has the following advantages：
1) the surface functional group property of activated carbon is to influence adsorbent CO absorption2One of key factor of capacity.The present invention
Processing is modified activated carbon by infusion process, using infusion process by one or more carbonic acid containing the Ith A or the IIth A races
Salt or hydroxide are introduced into activated carbon surface and activated carbon CO is made in skeleton2Adsorbent.Due to carbonate or hydroxide sheet
The alkalinity of body makes it have certain CO absorption2Activity, while there is modification to activated carbon surface functional group.Activated carbon
The types of the active function groups on chemical composition and surface, quantity are to adsorbing and catalysis has significant impact.Surface chemical modification is main
Change the surface alkalinity of activated carbon, introduce or remove certain surface functional groups, make it have certain special absorption or catalysis
Performance.The chemical functional group on surface is divided into oxygen-containing functional group and nitrogen-containing functional group according to the difference containing essential element.Oxygen-containing official
It can roll into a ball and be divided into as acid and alkaline oxygen-containing functional group：Acidic-group has carboxyl, phenolic hydroxyl group, positive lactone group and ring type peroxy etc.,
Wherein carboxyl, phenolic hydroxyl group and ester group are main acidic oxide.The basic group generally accepted is class pyranone building stone.Cause
This can be by changing the acidity of activated carbon surface and the content of basic group, so as to change the absorption property of activated carbon.Activity
The modification of carbon surface chemical property can be from oxidation, modified with reduction and carried metal etc. progress.The present invention passes through impregnation
Alkaline matter is introduced into activated carbon, improves the alkalinity on its surface.By the alkaline matter of load to absorbate stronger knot
With joint efforts, so as to increase adsorption capacity of the activated carbon to absorbate.
2) in addition, the mass transfer accelerating agent in the present invention reduces CO2Diffusional resistance in adsorption process makes whole absorption
Rate increases so that absorption property significantly improves.Thus, the adsorbent of preparation solves existing adsorbent and there is absorption simultaneously
A series of problems, such as capacity is low, adsorptive selectivity is poor.
3) using the present invention adsorbent, adsorbent before use, in the atmosphere of humidification (relative humidity 50-90%), often
It is anticipated under temperature 3 hours.Absorption is 0~65 DEG C in temperature, and pressure is 0~3.0MPa, gas volume air speed for 100~
10000h-1Under conditions of, relative humidity is 5%~95%, CO2Initial concentration is 0.02~0.3%, containing CO2Gas raw material
By being filled with claim 1~7 any one of them modified activated carbon CO2The absorber of adsorbent is adsorbed, and is obtained net
Gas after change.The CO prepared by the present invention2Adsorbent achieves preferable technique effect.
To sum up, the present invention will be introduced containing the one or more salt or alkali compound of the Ith A or the IIth A races using infusion process and be lived
Property charcoal duct and surface modification is carried out to it, mass transfer accelerating agent is utilized to improve adsorbent absorption property and preparation method thereof
Technical solution preferably solves the problems, such as this, available for various raw material CO2In adsorbing separation and purification process.
Specific embodiment
The present invention is further described with reference to embodiments：
Embodiment 1
Present embodiment discloses a kind of dipping modified activated carbon absorbent for loading sodium carbonate, by equivalent impregnation preparation process
It is as follows.First, 21.2g sodium carbonate is weighed, is added in 100ml deionized waters, prepares the carbonic acid that molar concentration is 0.2mol/L
Sodium solution I weighs 5g neopelexes (SDBS), dissolves in sodium carbonate liquor I, obtained solution II.By preliminary experiment,
The water absorption rate of activated carbon is measured in advance.200g activated carbons accurately are weighed, the water absorption rate surveyed according to front prepares aforementioned 100ml
Solution II, solution II is poured into the container equipped with activated carbon and is sufficiently stirred, be uniformly mixed.After drying or drying, mill
Broken, sieving takes a diameter of 1700 μm of absorbent particles, in 300 DEG C of drying until quality is no longer reduced, obtains based on dipping activity
The CO of charcoal2Solid absorbent.
On fixed bed device, CO of the present embodiment based on Immesion active carbon is used2Solid absorbent carries out CH4Middle CO2
Adsorbing and removing, i.e., absorption property evaluate.The content of each component is as follows in unstripped gas, CO2：1000ppmv, CH4Balance.Adsorbent
CO2Experiment condition is checked and rated in absorption：It it is 30 DEG C, pressure 0.1MPa in temperature, relative humidity is 80% gas volume air speed
For 2000h-1Under conditions of, gas raw material carries out adsorption cleaning by being filled with the absorber of acticarbon, is purified
CH afterwards4。CO2The appraisal results such as removal efficiency, equilibrium adsorption capacities and separation factor are given in Table 2.
Embodiment 2
Present embodiment discloses a kind of dipping modified activated carbon absorbent for loading lithium carbonate, by equivalent impregnation preparation process
It is as follows.First, 14.8g lithium carbonates are weighed, are added in 100ml deionized waters, prepare the carbonic acid that molar concentration is 0.2mol/L
Lithium solution I weighs 5g neopelexes (SDBS), dissolves in Lithium carbonate solution I, obtained solution II.By preliminary experiment,
The water absorption rate of activated carbon is measured in advance.200g activated carbons accurately are weighed, the water absorption rate surveyed according to front prepares aforementioned 100ml
Solution II, solution II is poured into the container equipped with activated carbon and is sufficiently stirred, be uniformly mixed.After drying or drying, mill
Broken, sieving takes a diameter of 1700 μm of absorbent particles, in 300 DEG C of drying until quality is no longer reduced, obtains based on dipping activity
The CO of charcoal2Solid absorbent.
On fixed bed device, CO of the present embodiment based on Immesion active carbon is used2Solid absorbent carries out CH4Middle CO2
Adsorbing and removing, i.e., absorption property evaluate.The content of each component is as follows in unstripped gas, CO2：1000ppmv, CH4Balance.Adsorbent
CO2Experiment condition is checked and rated in absorption：It it is 30 DEG C, pressure 0.1MPa in temperature, relative humidity is 80% gas volume air speed
For 2000h-1Under conditions of, gas raw material carries out adsorption cleaning by being filled with the absorber of acticarbon, is purified
CH afterwards4。CO2The appraisal results such as removal efficiency, equilibrium adsorption capacities and separation factor are given in Table 2.
Embodiment 3
Present embodiment discloses a kind of dipping modified activated carbon absorbent for loading potassium carbonate, by equivalent impregnation preparation process
It is as follows.First, 27.6g potassium carbonate is weighed, is added in 100ml deionized waters, prepares the carbonic acid that molar concentration is 0.2mol/L
Potassium solution I weighs 5g neopelexes (SDBS), dissolves in solution of potassium carbonate I, obtained solution II.By preliminary experiment,
The water absorption rate of activated carbon is measured in advance.200g activated carbons accurately are weighed, the water absorption rate surveyed according to front prepares aforementioned 100ml
Solution II, solution II is poured into the container equipped with activated carbon and is sufficiently stirred, be uniformly mixed.After drying or drying, mill
Broken, sieving takes a diameter of 1700 μm of absorbent particles, in 300 DEG C of drying until quality is no longer reduced, obtains based on dipping activity
The CO of charcoal2Solid absorbent.
On fixed bed device, CO of the present embodiment based on Immesion active carbon is used2Solid absorbent carries out CH4Middle CO2
Adsorbing and removing, i.e., absorption property evaluate.The content of each component is as follows in unstripped gas, CO2：1000ppmv, CH4Balance.Adsorbent
CO2Experiment condition is checked and rated in absorption：It it is 30 DEG C, pressure 0.1MPa in temperature, relative humidity is 80% gas volume air speed
For 2000h-1Under conditions of, gas raw material carries out adsorption cleaning by being filled with the absorber of acticarbon, is purified
CH afterwards4。CO2The appraisal results such as removal efficiency, equilibrium adsorption capacities and separation factor are given in Table 2.
Embodiment 4
Present embodiment discloses a kind of dipping modified activated carbon absorbents for loading sodium hydroxide, are prepared by equivalent impregnation
Journey is as follows.First, 8g sodium hydroxides are weighed, are added in 100ml deionized waters, prepare the hydrogen-oxygen that molar concentration is 0.2mol/L
Change sodium solution I, weigh 5g neopelexes
(SDBS), sodium hydroxide solution I, obtained solution II are dissolved in.By preliminary experiment, the water suction of activated carbon is measured in advance
Rate.200g activated carbons accurately are weighed, the water absorption rate surveyed according to front, the solution II that aforementioned 100ml is prepared pours into solution II
It is sufficiently stirred, is uniformly mixed in container equipped with activated carbon.After drying or drying, grind, being sieved takes absorbent particles straight
Diameter is 1700 μm, in 300 DEG C of drying until quality is no longer reduced, obtains the CO based on Immesion active carbon2Solid absorbent.
On fixed bed device, CO of the present embodiment based on Immesion active carbon is used2Solid absorbent carries out CH4Middle CO2
Adsorbing and removing, i.e., absorption property evaluate.The content of each component is as follows in unstripped gas, CO2：1000ppmv, CH4Balance.Adsorbent
CO2Experiment condition is checked and rated in absorption：It it is 30 DEG C, pressure 0.1MPa in temperature, relative humidity is 80% gas volume air speed
For 2000h-1Under conditions of, gas raw material carries out adsorption cleaning by being filled with the absorber of acticarbon, is purified
CH afterwards4。CO2The appraisal results such as removal efficiency, equilibrium adsorption capacities and separation factor are given in Table 2.
Embodiment 5
Present embodiment discloses a kind of dipping modified activated carbon absorbents for loading potassium hydroxide, are prepared by equivalent impregnation
Journey is as follows.First, 11.2g potassium hydroxide is weighed, is added in 100ml deionized waters, it is 0.2mol/L's to prepare molar concentration
Potassium hydroxide solution I weighs 5g lauryl sodium sulfate
(SDS), potassium hydroxide solution I, obtained solution II are dissolved in.By preliminary experiment, the water suction of activated carbon is measured in advance
Rate.200g activated carbons accurately are weighed, the water absorption rate surveyed according to front, the solution II that aforementioned 100ml is prepared pours into solution II
It is sufficiently stirred, is uniformly mixed in container equipped with activated carbon.After drying or drying, grind, being sieved takes absorbent particles straight
Diameter is 1700 μm, in 300 DEG C of drying until quality is no longer reduced, obtains the CO based on Immesion active carbon2Solid absorbent.
On fixed bed device, CO of the present embodiment based on Immesion active carbon is used2Solid absorbent carries out CH4Middle CO2
Adsorbing and removing, i.e., absorption property evaluate.The content of each component is as follows in unstripped gas, CO2：1000ppmv, CH4Balance.Adsorbent
CO2Experiment condition is checked and rated in absorption：It it is 30 DEG C, pressure 0.1MPa in temperature, relative humidity is 80% gas volume air speed
For 2000h-1Under conditions of, gas raw material carries out adsorption cleaning by being filled with the absorber of acticarbon, is purified
CH afterwards4。CO2The appraisal results such as removal efficiency, equilibrium adsorption capacities and separation factor are given in Table 2.
Embodiment 6~19
Each step according to embodiment 1 prepares Immesion active carbon adsorbent with condition and checks and rates.It is molten only to change dipping
Liquid concentration, composition or preparation condition, the condition of change are listed in table 1.Adsorbent CO absorption2Checking and rating experiment condition is：It is in temperature
30 DEG C, pressure 0.1MPa, relative humidity 80%, gas volume air speed is 2000h-1Under conditions of, gas raw material is by dress
The absorber for being filled with acticarbon carries out adsorption cleaning, the CH after being purified4。CO2Removal efficiency, equilibrium adsorption capacities and
The appraisal results such as separation factor are given in Table 2.
Table 1
Table 2
Comparative example 1
It is 368m to take specific surface area2The coaly activated carbon of/g is adsorbent.Activated carbon roasts 8 by drying at 500 DEG C
Hour, it grinds, be sieved takes adsorbent average particle diameter as 1700 μm, it is spare in 300 DEG C of drying up to quality is no longer reduced.
On fixed bed device, using the adsorbent of above-mentioned preparation, adsorbent examination is carried out.CO absorption2Examination experiment item
Part is：It it is 30 DEG C, pressure 0.1MPa in temperature, relative humidity 80%, gas volume air speed is 2000h-1Under conditions of, gas
Body raw material carries out adsorption cleaning, the CH after being purified by being filled with the absorber of acticarbon4。CO2Removal efficiency is put down
The adsorption capacity that weighs and CO2/CH4The appraisal results such as separation factor are given in Table 2.As a result it is given in Table 2.
Comparative example 2
It is 461m to take specific surface area2The fruit shell carbon activated carbon of/g is adsorbent.Activated carbon is roasted by drying at 500 DEG C
It burns 8 hours, grinds, be sieved takes adsorbent average particle diameter as 1700 μm, it is standby in 300 DEG C of drying up to quality is no longer reduced
With.
On fixed bed device, using the adsorbent of above-mentioned preparation, adsorbent examination is carried out.CO absorption2Examination experiment item
Part is：It it is 30 DEG C, pressure 0.1MPa in temperature, relative humidity 80%, gas volume air speed is 2000h-1Under conditions of, gas
Body raw material carries out adsorption cleaning, the CH after being purified by being filled with the absorber of acticarbon4。CO2Removal efficiency is put down
The adsorption capacity that weighs and CO2/CH4The appraisal results such as separation factor are given in Table 2.As a result it is given in Table 2.
Comparative example 3
It is 370m to take specific surface area2The bamboo charcoal of/g is adsorbent.Activated carbon passes through drying, is roasted 8 hours at 500 DEG C,
It grinds, being sieved takes adsorbent average particle diameter as 1700 μm, spare in 300 DEG C of drying until quality is no longer reduced.
On fixed bed device, using the adsorbent of above-mentioned preparation, adsorbent examination is carried out.CO absorption2Examination experiment item
Part is：It it is 30 DEG C, pressure 0.1MPa in temperature, relative humidity 80%, gas volume air speed is 2000h-1Under conditions of, gas
Body raw material carries out adsorption cleaning, the CH after being purified by being filled with the absorber of acticarbon4。CO2Removal efficiency is put down
The adsorption capacity that weighs and CO2/CH4The appraisal results such as separation factor are given in Table 2.As a result it is given in Table 2.
Comparative example 4
It is 363m to take specific surface area2The carbo lignius of/g is adsorbent.It is small to roast 8 by drying at 500 DEG C for activated carbon
When, it grinds, being sieved takes adsorbent average particle diameter as 1700 μm, it is spare in 300 DEG C of drying until quality is no longer reduced.
On fixed bed device, using the adsorbent of above-mentioned preparation, adsorbent examination is carried out.CO absorption2Examination experiment item
Part is：It it is 30 DEG C, pressure 0.1MPa in temperature, relative humidity 80%, gas volume air speed is 2000h-1Under conditions of, gas
Body raw material carries out adsorption cleaning, the CH after being purified by being filled with the absorber of acticarbon4。CO2Removal efficiency is put down
The adsorption capacity that weighs and CO2/CH4The appraisal results such as separation factor are given in Table 2.As a result it is given in Table 2.
It can be seen that from the results of comparison of embodiment and comparative example and solved well by technical solution provided by the invention
The CO of adsorbent2Removal efficiency, equilibrium adsorption capacities and CO2The problems such as adsorptive selectivity is poor achieves preferable technique effect.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to
Can so modify to the technical solution recorded in foregoing embodiments either to which part or all technical features into
Row equivalent replacement；And these modifications or replacement, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of CO based on Immesion active carbon2Solid absorbent, which is characterized in that by weight ratio including following each component：
A) 83~95 parts of absorbent charcoal carriers；
B) 1~15 part of one or more carbonate or hydroxide containing the Ith A or the IIth A races；
C) the mass transfer accelerating agent that 0~6 part of at least one element containing the Ith A races is formed.
2. the CO based on Immesion active carbon according to claim 12Solid absorbent, which is characterized in that the absorbent charcoal carrier
For the mixing of one or more of coaly activated carbon, wood activated charcoal, fruit shell carbon and bamboo charcoal.
3. the CO according to claim 1 or claim 2 based on Immesion active carbon2Solid absorbent, which is characterized in that the activated carbon
The specific surface area of carrier, which is more than, is equal to 240m2/g。
4. the CO based on Immesion active carbon according to claim 12Solid absorbent, which is characterized in that the carbonate is
Li2CO3、Na2CO3And K2CO3One or more of mixing, the hydroxide be LiOH, NaOH and KOH in one kind or several
Kind mixing.
5. the CO based on Immesion active carbon according to claim 12Solid absorbent, which is characterized in that described to be lived based on dipping
The CO of property charcoal2Specific surface area >=200m of solid absorbent2/ g, granular size are 1700~4800 μm.
6. a kind of CO based on Immesion active carbon described in claim 1-5 any one2The preparation method of solid absorbent, it is special
Sign is, includes the following steps：
Step 1 weighs one or more carbonate or hydroxide containing the Ith A or the IIth A races, and it is 0.1 to prepare molar concentration
The solution I of~0.5mol/L；
Step 2 adds in the mass transfer accelerating agent that at least one element containing the Ith A races is formed in above-mentioned solution I, makes solution
The molar concentration of middle mass transfer accelerating agent is 0.1~0.5mol/L, and the solution is named to be existed simultaneously in the solution II for solution II
Ith A or the one or more carbonate or hydroxide and mass transfer accelerating agent of the IIth A races；
Step 3 impregnates absorbent charcoal carrier particle with the solution II prepared in step 2, be immersed under room temperature, normal pressure into
Row, dries or heating, drying, and the CO based on Immesion active carbon is made2Solid absorbent.
7. the CO based on Immesion active carbon according to claim 62The preparation method of solid absorbent, which is characterized in that step
In 1, prepare the molar concentration of one or more carbonate containing the Ith A or the IIth A races or hydroxide for 0.15~
0.25mol/L。
8. the CO based on Immesion active carbon according to claim 62The preparation method of solid absorbent, which is characterized in that step
The molar concentration of mass transfer accelerating agent that at least one element containing the Ith A races in 2 is formed is 0.15~0.3mol/L.
9. the CO based on Immesion active carbon according to claim 62The preparation method of solid absorbent, which is characterized in that dipping
Process is incipient impregnation.
10. the CO based on Immesion active carbon described in claim 1-5 any one2Solid absorbent is in CO absorption2The use in field
On the way.
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Application publication date: 20180608 |