CN103230778B - Solid absorbent with high CO2 adsorption capacity and preparation method thereof - Google Patents

Solid absorbent with high CO2 adsorption capacity and preparation method thereof Download PDF

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CN103230778B
CN103230778B CN201310182229.7A CN201310182229A CN103230778B CN 103230778 B CN103230778 B CN 103230778B CN 201310182229 A CN201310182229 A CN 201310182229A CN 103230778 B CN103230778 B CN 103230778B
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solid absorbent
absorbent
preparation
gel
adsorption capacity
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CN103230778A (en
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陈晓平
吴烨
董伟
张中林
刘道银
梁财
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Southeast University
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Abstract

The invention discloses a solid absorbent with high CO2 adsorption capacity and a preparation method thereof. The solid absorbent comprises active components and a carrier; the active components are alkali carbonate and an amino group at the surface of the carrier, and are 15-60% of total quality of the solid absorbent; the molar ratio of the alkali carbonate and the amino group is 1 to (0.5-25); and the carrier is monox, and is 40-85% of total quality of the solid absorbent. The preparation method comprises the following steps of mixing and stirring the materials into emulsion; putting the emulsion into air to form cross-linking gel; putting the gel into a sealed dryer; soaking the gel by ethanol; and drying and screening the gel by a supercritical drying method, so as to prepare the solid absorbent with high CO2 adsorption capacity. The absorbent is low in price, stable in structure, high in carbonic acid conversion ratio, not easy to inactivate, and small in corrosion on equipment, and has certain mechanical strength, and high cyclic utilization rate; and the preparation method of the absorbent is convenient to operate, and low in expenses.

Description

A kind of high CO 2solid absorbent of adsorption capacity and preparation method thereof
Technical field
The present invention relates to absorbent and preparation method field, particularly the high CO of one 2solid absorbent of adsorption capacity and preparation method thereof.
Background technology
Greenhouse effects and the impact brought thereof become the focus that the whole world is paid close attention to day by day.Wherein, with CO 2be a large amount of discharges of main greenhouse gases be cause the increasing main cause of greenhouse effects.According to the blueprint display of International Energy Agency (IEA) energy technology statistics bureau (ETP) statistics in 2008, expect the year two thousand fifty, CO 2annual emissions will rise to about 57GT, be current CO 2the twice of annual emissions 29GT.In order to by CO in air 2concentration in the year two thousand fifty time control within 450ppm, CO 2annual emissions must reduce to 14GT, and this will be a great challenge.Since 2008, the CO of China 2annual emissions is 7GT, exceedes U.S. 5.5GT and occupies the first in the world.For China, reduce discharging CO 2shoulder heavy responsibilities.
Along with China's rapid development of economy, energy-output ratio also can continue to increase, and as a responsible big country, China will face larger international pressure.Therefore, actively develop the research of carbon dioxide discharge-reduction aspect, the road exploring the carbon dioxide discharge-reduction tallied with the national condition is extremely urgent.Current, relevant CO 2the technology reduced discharging emerges in an endless stream, and wherein, the technology of decarburization after being applied to the burning of thermal power industry owing to only additionally need increase a set of CO in existing system 2separator, improvement cost is relatively low, and technical feasibility is higher, becomes one of current study hotspot.
Alkali metal base absorbant is as a kind of low temperature CO 2absorbent, its carbonation temperature is only 60-80 DEG C, regeneration temperature is 100-200 DEG C, reaction system institute energy requirement can be provided by boiler tail flue gas waste heat completely, energy consumption comparable traditional monoethanolamine (MEA) absorption process declines 16%, and have absorbent not easy in inactivation, cyclic utilization rate high, to advantages such as equipment corrosion are light.Therefore, alkali metal base absorbant has broad application prospects.
2000-2005, under the subsidy of U.S. Department of Energy, Louisiana State University, Research Triangle Institute and Church & Dwight are for alkali carbonate (Na 2cO 3, K 2cO 3) dry removal CO 2technology is studied, and has applied for United States Patent (USP): 6387337B1(2002.5.14.), 6280503B1(2001.8.28.) etc.In recent years, under the subsidy of Korean science technology department " 21stCentury Frontier Programs ", Korea S Kyungpook National University, Yeungnam University, Korea Electric Power Research Institute and Korea Institute of Energy Research has also carried out relevant research.Korea Electric Power has applied for Chinese patent CN200410101564.0, US Patent No. P20060148642.Domestic Southeast China University has also carried out the correlative study of this technology, mainly around potassium-base absorbing agent dry removal CO 2art applications Chinese patent CN200810024780.8, CN200810122644.2, CN200820037600.5, CN201010200431.4, CN201010279512.8 and CN201010129262.X.
Above-mentioned patent is all by existing material, the methods such as infusion process are utilized carrier material and active material to be carried out mixing preparing, the characteristic that original vector material is intrinsic can not be changed, as pore structure, specific area etc., conventional infusion process, the method for spray-on process even load can reduce the pore structure of carrier material itself to a certain extent, as carrier material γ-Al 2o 3after carbonate load, its specific area can reduce, and when load, active principle can cause the hole plug of carrier material too much, therefore, has significant limitation when absorbent preparation, need with a large amount of carrier materials (more than 60wt%) for active component provides enough specific areas, thus reduce the decarburization capacity of absorbent entirety.
Summary of the invention
The object of the present invention is to provide a kind of high CO 2solid absorbent of adsorption capacity and preparation method thereof.This absorbent is cheap, Stability Analysis of Structures, carbonate treatment rate are high, not easy in inactivation, little to equipment corrosion, there is certain mechanical strength, cyclic utilization rate is high; Absorbent preparation method is easy to operate, low cost.
The present invention is by the following technical solutions:
A kind of high CO 2the solid absorbent of adsorption capacity, described solid absorbent comprises active component and carrier, described active component is the amine groups of alkali carbonate and carrier surface, account for 15% ~ 60% of solid absorbent gross mass, wherein the mol ratio of the amine groups of alkali carbonate and carrier surface is 1:0.5 ~ 25; Described carrier is silica, accounts for 40% ~ 85% of solid absorbent gross mass.
Further, described alkali carbonate is potash or sodium carbonate.
High CO described in preparation 2the method of the solid absorbent of adsorption capacity, comprises the following steps:
Step one, by 2wt% ~ 50wt% alkali metal carbonate solution, silane coupler with amido, ethyl orthosilicate, ethanol by 1 ~ 3:1 ~ 3:1:3 volume ratio mixing, be uniformly mixed solution and become emulsion to it;
Step 2, emulsion step one obtained leave standstill, and topple over described emulsion and can not flow to emulsion, formed crosslinked gel;
Step 3, gel step 2 obtained are placed in close drying device, drying time 1 ~ 5h;
Step 4, the gel using alcohol immersion step 3 to obtain, soak time 24 ~ 48h;
Step 5, the gel drying using supercritical drying step 4 to be obtained and screening, thus prepare high CO 2the solid absorbent of adsorption capacity, wherein, supercritical drying temperature is 30 ~ 45 DEG C, and drying pressure is 10 ~ 20MP.
Further, the described silane coupler with amido is gamma-aminopropyl-triethoxy-silane or γ-aminopropyltrimethoxysilane.
Further, the drying time in described step 3 is 1h.
Further, the soak time in described step 4 is 24h.
Further, described emulsion is toppled over 45 ° of inclination angles in described step 2.
Principle of the present invention: conventional sol-gal process needs to utilize the alkali lye such as ammoniacal liquor to regulate the pH value of solution, thus promote gel reaction.By contrast, active component alkali carbonate is made aqueous slkali by the present invention, utilizes sol-gel process and supercritical drying to be carried on SiO 2on, and in addition surface amine groups is modified, and can form stable in properties, CO 2the solid absorbent that absorbability is strong, show excellent carbonation reaction characteristic, avoid some side effects caused because adding adhesive, and this preparation method breaking through the conventional physical load method such as infusion process, spray-on process, carbonate being carried on the SiO of band amido 2on, on the one hand, the aqueous slkali made by active component alkali carbonate in absorbent plays the effect of catalysis gel reaction in absorbent preparation process, utilize supercritical drying to carry out drying to aeroge simultaneously, the former framework of the silicon in blob of viscose can not be shunk and cause that carrier silicon is former to be covered most of active component (alkali carbonate and amine groups).Therefore, the absorbent that the method obtains has flourishing pore structure, effectively facilitates the decarburization-regenerative response (decarburization and regeneration temperature range are lower than the support type absorbent of routine) of active component.On the other hand, the catalyst carrier hole surface that the present invention designs preparation is also rich in amido, adds the CO of absorbent 2absorbability.The method changes pore structure and the specific area of absorbent by the volume ratio and gelling temp changing different material solution, thus preparation has the organic-inorganic composite solid absorbent of different specific surface, different pore structures.This absorbent fluidization characteristic is good, can be applicable to being applied to fixed bed and fluidized-bed reactor, have higher practical value.
Beneficial effect of the present invention:
1, all comparatively conventional load type absorbent is low for carbonation temperature and regeneration temperature, absorbent decarburization and regeneration rate fast.
2, carrier material is the SiO with flourishing pore structure 2, its specific area is large, and hole is flourishing, and have good load capacity and mechanical strength, because carrier predecessor is with amido, therefore the decarburization capacity of absorbent of the present invention is also promoted accordingly.
3, the alkali carbonate used, ethyl orthosilicate and gamma-aminopropyl-triethoxy-silane or γ-aminopropyltrimethoxysilane etc. are cheap, simple and easy to get with the silane coupler of amido, and mixed solution alkaline, therefore gelation rate is fast.By force, recycle number of times high, economy is high for obtained solid absorbent decarburization and power of regeneration; By regulating each material solution ratio to control active component and the specific surface of absorbent.
4, adopting supercritical drying, is a kind of technique that sol-gel process prepares nano-porous materials dry run.Because the solvent of gel skeleton inside exists surface tension, the collapse of skeleton can be caused under common drying condition.Supercritical drying is intended to the control by pressure and temperature, makes solvent in dry run, reach the critical point of itself, completes the hypercritical transition of liquid phase to gas phase.In process, solvent is without obvious surface tension, under the prerequisite maintaining skeleton structure, complete the transformation of wet gel to aeroge.Method is simple, and workable, be easy to automatic management, active component is evenly distributed at carrier surface.
In sum, a large amount of carbonate isoreactivity uniform composition can be distributed on carrier material by preparation method involved in the present invention, absorbent surface also can utilize amido to modify, finally coordinate supercritical drying, make the carrier frame in blob of viscose to shrink and to cause carrier to be covered by most of active component (alkali carbonate and amine groups), thus improve the decarburization characteristics of absorbent.Solid absorbent CO of the present invention 2uptake is large, power of regeneration is strong, stable performance, regeneration energy consumption is low, preparation is simple and corrosivity is little, is post-combustion capture CO 2the ideal solid absorbent of technology, application prospect is boundless.
Accompanying drawing explanation
Fig. 1 is the nitrogen adsorption characterization test figure of the absorbent prepared by embodiment 1.
Fig. 2 is solid absorbent decarburization capacity experimental apparatus for testing prepared by the present invention.
Fig. 3 is the CO of the absorbent prepared by embodiment 1 2adsorption-desorption curve.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, further description is done to the present invention, should be appreciated that following examples are only intended to illustrate, should not be regarded as limitation of the scope of the invention.
A kind of high CO 2the solid absorbent of adsorption capacity, described solid absorbent comprises active component and carrier, described active component is the amine groups of alkali carbonate (potash or sodium carbonate) and carrier surface, account for 15% ~ 60% of solid absorbent gross mass, wherein the mol ratio of the amine groups of alkali carbonate and carrier surface is 1:0.5 ~ 25; Described carrier is silica, accounts for 40% ~ 85% of solid absorbent gross mass.
Above-mentioned high CO 2the preparation method of the solid absorbent of adsorption capacity, comprises the following steps:
Step one, by certain mass concentration alkali metal carbonate solution, with the silane coupler (gamma-aminopropyl-triethoxy-silane or γ-aminopropyltrimethoxysilane) of amido, ethyl orthosilicate, ethanol by 1 ~ 3:1 ~ 3:1:3 volume ratio mixing, be uniformly mixed solution and become emulsion to it;
Step 2, emulsion step one obtained are placed in air and leave standstill, and topple over preferably 45 ° of inclination angles and topple over emulsion to described emulsion and can not flow, formed crosslinked gel;
Step 3, gel step 2 obtained are placed in close drying device, drying time 1 ~ 5h, preferred 1h;
Step 4, the gel using alcohol immersion step 3 to obtain, soak time 24 ~ 48h, preferred 24h;
Step 5, the gel drying using supercritical drying step 4 to be obtained and screening, thus prepare high CO 2the solid absorbent of adsorption capacity, wherein, supercritical drying temperature is 30 ~ 45 DEG C, and drying pressure is 10 ~ 20MP.
Solid absorbent prepared by the present invention can be made into graininess and Powdered.Particle mean size 200 ~ 600 μm during graininess, particle size distribution 150 ~ 1000 μm, time Powdered, can prepare nm-class.
Solid absorbent of the present invention is using alkali carbonate as active component and carrier predecessor hydrolyst, and its alkali carbonate can use hydrated carbonate, bicarbonate, oxyhydroxide etc. to obtain as predecessor.Described carrier is formed by solgel reaction by the silane coupler with amido such as predecessor ethyl orthosilicate and gamma-aminopropyl-triethoxy-silane or γ-aminopropyltrimethoxysilane etc., because described silane coupler is with amido, therefore absorbent surface regulates amine groups content by changing coupling agent consumption, thus absorbent surface is modified, reach best CO 2absorption value.The solid absorbent surface amine groups of preparation and carbonate content enrich, and pore structure is flourishing, has very high CO 2adsorption capacity.
The method that solid absorbent of the present invention removes carbon dioxide in flue gas belongs to the dry technique of chemical absorbing, fixed bed or fluidized-bed reactor can be adopted in 20 ~ 60 DEG C of temperature ranges to carry out carbonation reaction, thermal regeneration in 100 ~ 150 DEG C of temperature ranges, reactivation heat can be provided by fume afterheat completely.
Embodiment 1
Taking 1.3g sodium carbonate is dissolved in 50ml water, measure 50ml ethyl orthosilicate respectively, 50ml gamma-aminopropyl-triethoxy-silane, above-mentioned three kinds of solution are put into 150ml ethanol, is placed on agitator and stirs 10 minutes, become after emulsion until solution and stop stirring, be placed in air, when not flowing with 45o pouring soln, solution occurs crosslinked, this cross-linked gel is put into close drying and wherein deposits 1h.Afterwards, utilize alcohol immersion gel 24h to replace the moisture contained in gel, finally, utilize supercritical drying that gel is carried out drying, screening, wherein baking temperature 45 DEG C, drying pressure 20Mpa, thus prepare high CO 2the solid absorbent of adsorption capacity.
Each component and mass percent thereof in the solid absorbent prepared in the present embodiment: active component, 15%, wherein carbonate content: 4.1%, amine groups content: 10.9%, the mol ratio of sodium carbonate and amido is 1:23; Carrier, 85%.
Solid absorbent prepared by embodiment 1 is characterized and CO 2absorption property is tested.The automated gas sorption analyzer utilizing Quantachrome instruments company of the U.S. to provide carries out nitrogen adsorption test to absorbent, the pore-size distribution of the agent that is absorbed and BET specific surface area, as shown in Figure 1.The aperture of absorbent is mainly distributed between 10 to 35nm, and wherein 32nm pore-size distribution is the widest, reaches peak value, and be typical middle pore size distribution, this pores is suitable for CO 2absorption.The specific area of prepared absorbent is 102m 2/ g.
Carried out the decarburization capacity test of absorbent by experimental rig as shown in Figure 2, this device comprises CO 2steel cylinder gas 1, N 2steel cylinder gas 2, flowmeter 3, steam evaporator 4, heat tape 5, quartz glass pipe reactor 6, mineral wool 7, absorbent 8, mineral wool 9, reactor heaters 10, filter 11, flue gas analyzer 12, DAF 13.Before experiment starts, absorbent prepared by 0.2g embodiment 1 being added quartz glass pipe reactor 6 as shown in Figure 2, is first that 600mL/min nitrogen passes into quartz glass pipe reactor 6 by flow.By heat tape 5 by quartz glass pipe reactor 6 heating temperatures to 150 DEG C, maintain 30 minutes.Then quartz glass pipe reactor 6 temperature is made to be reduced to carbonation temperature 50 DEG C.After temperature stabilization, nitrogen is switched to reaction gas (1v-%H 2o+1v-%CO 2+ N 2be made into), flow is 300mL/min, starts to carry out decarburizing reaction, and when in quartz glass pipe reactor 6 exit gas, the concentration of carbon dioxide is 1v-%, carbonation reaction terminates (see Fig. 3 CO 2absorption curve).Now, again reaction gas is switched to nitrogen, flow is 600mL/min, treats CO in flue gas analyzer 12 2when concentration is 0, by quartz ampoule glass tube reactor 6 heating temperatures to regeneration temperature 120 DEG C, when to show gas concentration lwevel be 0 to flue gas analyzer 12, regenerative response terminates (see Fig. 3 CO 2desorption curve).
N C = ( ∫ V c C 0 dt - ∫ V c ( 1 - p 1 - C 0 ) C c 1 - C c dt ) / ( 60 × 22.4 ) / 0.2 - - - ( E 1 )
N R = ( ∫ C R 1 - C R V R dt ) / ( 60 × 22.4 ) / 0.2 - - - ( E 2 )
In formula
C 0---Reactor inlet carbon dioxide in flue gas concentration (%) in carbonation reaction process;
P 1---water vapor concentration (%) in Reactor inlet flue gas in carbonation reaction process;
V c---in carbonation reaction process, the tolerance (mL/min) of simulated flue gas;
V r---in regenerative response process, fluidized wind (N 2) tolerance (mL/min);
Cc---reactor outlet carbon dioxide in flue gas concentration (%) in carbonation reaction process;
C r---reactor outlet carbon dioxide in flue gas concentration (%) in regenerative response process;
N c---carbonation reaction carbon dioxide in process uptake (mol);
N r---regenerative response carbon dioxide in process burst size (mol).
Utilize E1 and E2 respectively to CO 2absorption curve and CO 2desorption curve carries out the CO calculating absorbent 2ability, acquired results is:
N c=2.01mmol/g absorbent
N r=2.20mmol/g absorbent
Solid absorbent decarburized amount prepared by the present embodiment is 2.1mmol/g absorbent.
Embodiment 2
Taking 10g sodium carbonate is dissolved in 50ml water, measure 50ml ethyl orthosilicate respectively, 100ml gamma-aminopropyl-triethoxy-silane, above-mentioned three kinds of solution are put into 150ml ethanol, is placed on agitator and stirs 10 minutes, become after emulsion until solution and stop stirring, be placed in air, when not flowing with 45 ° of pouring solns, solution occurs crosslinked, this cross-linked gel is put into close drying and wherein deposits 5h.Afterwards, utilize alcohol immersion gel 48h to replace the moisture contained in gel, finally, utilize supercritical drying that gel is carried out drying, screening, wherein baking temperature 30 DEG C, drying pressure 15Mpa, thus prepare high CO 2the solid absorbent of adsorption capacity.
Each component and mass percent thereof in the solid absorbent prepared in the present embodiment: active component, 30%, wherein carbonate content: 17.9%, amine groups content: 12.1%, the mol ratio of sodium carbonate and amido is 1:6; Carrier, 70%.Solid absorbent decarburized amount prepared by the present embodiment is: 3.3mmol CO 2/ g absorbent.
Embodiment 3
Taking 20g potash is dissolved in 50ml water, measure 50ml ethyl orthosilicate respectively, 50ml γ-aminopropyltrimethoxysilane, above-mentioned three kinds of solution are put into 150ml ethanol, is placed on agitator and stirs 10 minutes, become after emulsion until solution and stop stirring, be placed in air, when not flowing with 45 ° of pouring solns, solution occurs crosslinked, this cross-linked gel is put into close drying and wherein deposits 3h.Afterwards, utilize alcohol immersion gel 24h to replace the moisture contained in gel, finally, utilize supercritical drying that gel is carried out drying, screening, wherein baking temperature 40 DEG C, drying pressure 20Mpa, thus prepare high CO 2the solid absorbent of adsorption capacity.
Each component and mass percent thereof in the solid absorbent prepared in the present embodiment: active component, 46.8%, wherein potash content: 40%, amine groups content: 6.8%, the mol ratio of potash and amido is 1:1.5; Carrier, 53.2%.Solid absorbent decarburized amount prepared by the present embodiment is: 4.0mmol CO 2/ g absorbent.
Embodiment 4
Taking 40g potash is dissolved in 50ml water, measure 50ml ethyl orthosilicate respectively, 50ml γ-aminopropyltrimethoxysilane, above-mentioned three kinds of solution are put into 150ml ethanol, is placed on agitator and stirs 10 minutes, become after emulsion until solution and stop stirring, be placed in air, when not flowing with 45 ° of pouring solns, solution occurs crosslinked, this cross-linked gel is put into close drying and wherein deposits 1h.Afterwards, utilize alcohol immersion gel 24h to replace the moisture contained in gel, finally, utilize supercritical drying that gel is carried out drying, screening, wherein baking temperature 30 DEG C, drying pressure 10Mpa prepares high CO 2the solid absorbent of adsorption capacity.
Each component and mass percent thereof in the solid absorbent prepared in the present embodiment: active component, 62%, wherein potash content: 57.2%, amine groups content: 4.8%, the mol ratio of potash and amido is 1:0.7; Carrier, 38%.Solid absorbent decarburized amount prepared by the present embodiment is: 4.8mmol CO 2/ g absorbent.
Embodiment 5
Taking 50g potash is dissolved in 100ml water, measure 50ml ethyl orthosilicate respectively, 150ml γ-aminopropyltrimethoxysilane, above-mentioned three kinds of solution are put into 150ml ethanol, is placed on agitator and stirs 10 minutes, become after emulsion until solution and stop stirring, be placed in air, when not flowing with 45 ° of pouring solns, solution occurs crosslinked, this cross-linked gel is put into close drying and wherein deposits 3h.Afterwards, utilize alcohol immersion gel 36h to replace the moisture contained in gel, finally, utilize supercritical drying) gel is carried out drying, screening, wherein baking temperature 45 DEG C, drying pressure 20Mpa, thus prepare high CO 2the solid absorbent of adsorption capacity.
Each component and mass percent thereof in the solid absorbent prepared in the present embodiment: active component, 53.7%%, wherein potash content: 44.6%, amine groups content: 9.1%, the mol ratio of potash and amido is 1:1.8; Carrier, 46.3%.Solid absorbent decarburized amount prepared by the present embodiment is: 4.7mmolCO 2/ g absorbent.
Comparative example
See document (Chuanwen Zhao, Xiaoping Chen, Changsui Zhao, Ye Wu, and Wei Dong.K 2cO 3/ Al 2o 3for Capturing CO 2in Flue Gas from Power Plants.Energy Fuels, 2012,26:3062-3068):
K 2CO 3Load capacity (%) CO 2Uptake (mmolCO 2/ g absorbent)
12.8 0.93
19.9 1.43
28.1 1.86
36.8 2.66
45.1 1.52
The absorbent advantage that the present invention relates to is the overall decarburization capacity that improve absorbent on the one hand, on the other hand, energy consumption also declines to some extent, the absorption temperature of traditional support type potassium-base absorbing agent is 60 DEG C, regeneration temperature is more than 200 DEG C, and absorbent prepared by the present invention carries out carbonation reaction in 20 ~ 60 DEG C of temperature ranges, thermal regeneration in 100 ~ 150 DEG C of temperature ranges, reactivation heat can be provided by fume afterheat completely.

Claims (6)

1. a high CO 2the preparation method of the solid absorbent of adsorption capacity, it is characterized in that, described solid absorbent comprises active component and carrier, described active component is the amine groups of alkali carbonate and carrier surface, account for 15% ~ 60% of solid absorbent gross mass, wherein the mol ratio of the amine groups of alkali carbonate and carrier surface is 1:0.5 ~ 25; Described carrier is silica, accounts for 40% ~ 85% of solid absorbent gross mass; Preparation method comprises the following steps:
Step one, by 2wt% ~ 50wt% alkali metal carbonate solution, silane coupler with amido, ethyl orthosilicate, ethanol by 1 ~ 3:1 ~ 3:1:3 volume ratio mixing, be uniformly mixed solution and become emulsion to it;
Step 2, emulsion step one obtained leave standstill, and topple over described emulsion and can not flow to emulsion, formed crosslinked gel;
Step 3, gel step 2 obtained are placed in close drying device, drying time 1 ~ 5h;
Step 4, the gel using alcohol immersion step 3 to obtain, soak time 24 ~ 48h;
Step 5, the gel drying using supercritical drying step 4 to be obtained and screening, thus prepare high CO 2the solid absorbent of adsorption capacity, wherein, supercritical drying temperature is 30 ~ 45 DEG C, and drying pressure is 10 ~ 20MPa.
2. high CO according to claim 1 2the preparation method of the solid absorbent of adsorption capacity, is characterized in that, described alkali carbonate is potash or sodium carbonate.
3. high CO according to claim 1 and 2 2the preparation method of the solid absorbent of adsorption capacity, is characterized in that, the described silane coupler with amido is gamma-aminopropyl-triethoxy-silane or γ-aminopropyltrimethoxysilane.
4. high CO according to claim 1 and 2 2the preparation method of the solid absorbent of adsorption capacity, is characterized in that, the drying time in described step 3 is 1h.
5. high CO according to claim 1 and 2 2the preparation method of the solid absorbent of adsorption capacity, is characterized in that, the soak time in described step 4 is 24h.
6. high CO according to claim 1 and 2 2the preparation method of the solid absorbent of adsorption capacity, is characterized in that, topples over described emulsion in described step 2 with 45 ° of inclination angles.
CN201310182229.7A 2013-05-16 2013-05-16 Solid absorbent with high CO2 adsorption capacity and preparation method thereof Expired - Fee Related CN103230778B (en)

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CN104258828B (en) * 2014-09-23 2016-08-31 青岛科技大学 A kind of carbon dioxide absorber and preparation method thereof
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