64 results about "Amine solvent" patented technology

The invention belongs to the field of fine chemical engineering, and discloses a method for synthesizing 2, 3-dimethyl-2-isopropyl butyronitrile, which comprises the following steps of: adding an organic amine solvent into a high-pressure reaction kettle, adding sodium amide, sodium iodide and a phase transfer catalyst into the reaction kettle under the protection of nitrogen and in a stirring state, stirring for a certain period of time, and reacting for 2-3 hours to obtain 2, 3-dimethyl-2-isopropyl butyronitrile. Dropwise adding a mixed solution of propionitrile and 2-bromopropane into the reactor, controlling the dropwise adding speed and the reaction temperature, continuously reacting for a period of time after the dropwise adding is finished to obtain a reactant solution, cooling the reactant solution, adding water, standing for layering, collecting an organic phase, distilling the organic phase at normal pressure to recover a solvent, and rectifying at reduced pressure to obtain 2, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3-pentanediol. According to the method, the sodium iodide, the phase transfer catalyst and the organic amine have a synergistic effect, so that the reaction time is shortened, and the yield of the product is improved.

The invention discloses a system and a method for preparing a heterogeneous active solution suitable for a catalyst. The system comprises a raw material storage unit, a mother liquor storage unit, a corrosion-resistant reaction unit, a constant-temperature heating jacket, a solution filtering unit, a solution storage unit, an integrated online monitoring module, an exhaust system and the like. The system can realize automatic preparation and monitoring of an active solution; the method comprises the following steps: preparing a mother solution from oxalic acid, tartaric acid, citric acid, malic acid and other weak acids, complexing and dissolving the mother solution with a vanadium source, an active auxiliary agent and other substances, dynamically regulating the pH value to form a uniform active complex solution, and then using the solution to prepare the titanium dioxide supported vanadium-based SCR denitration catalyst. According to the method, an active complexing solution is prepared by adopting a one-step method, and the problems that a traditional organic amine solvent is high in toxicity, a prepared vanadium source is non-uniformly dispersed in a catalyst, active auxiliaries need to be prepared separately and the like are effectively solved. The denitration efficiency of the catalyst prepared by the method at the low temperature of 280 DEG C is improved by about 7-10%.

The application discloses a preparation method of a ferroferric oxide-sepiolite (Fe2O3-SEP) catalyst for CO2 amine solution desorption, wherein the catalyst is obtained by loading metal oxides on sepiolite through an impregnation method. The method comprises the following steps: firstly, magnetically stirring and impregnating a metal nitrate solution and sepiolite in a water bath, then performing suction filtration, drying, grinding and calcination to obtain the supported Fe2O3-SEP catalyst. The obtained catalyst is used for desorption of saturated amine-rich solution, the amine-lean solution after desorption is cooled, the CO2 loading amount of the amine-lean solution is titrated, CO2 is introduced again for absorption, and the amine-lean solution is recycled for 4-5 times. Compared with existing catalysts, the catalyst has the advantages of wide raw material distribution, low price, simple preparation process, no other by-products, stable catalytic performance and no influence on CO2 absorption performance of the amine solution.

The invention relates to the technical field of crude oil compounding, and discloses a crude oil structure determination method and device, and the method comprises the steps: screening out a target compound oil system from each compound oil system based on a first characteristic parameter of target crude oil and a second characteristic parameter of each compound oil system; according to the content of the acid gas and the content of the amine solvent in the target crude oil, establishing a chemical equilibrium model of the target compound oil system based on the reaction of the amine solvent and the acid gas; and solving the chemical equilibrium model until the target compound oil system reaches the target equilibrium state, and taking the structure corresponding to the target compound oil system in the target equilibrium state as the structure of the target crude oil. According to the scheme, the chemical equilibrium model of the compound oil system is established and solved based on the reaction of the amine solvent and the acid gas, and the target crude oil structure can be accurately simulated, so that the influence of the crude oil structure on crude oil behaviors can be accurately determined.

A composition for carbon dioxide (CO2) capture includes 2-aminocyclohexanol, cis-1,2-diaminocyclohexane, meglumine, or combinations thereof. A process of CO2 capture includes mixing a CO2-containing gas with the composition. A system includes a component for receiving a gas and the composition, which absorbs CO2 from the gas. A further composition includes a first amine solvent selected from 2-aminocyclohexanol, cis-1,2-diaminocyclohexane, and meglumine and a second amine solvent independently selected from 2-aminocyclohexanol, cis-1,2-diaminocyclohexane, meglumine, ethyl diethanolamine, dimethylethanolamine, piperidine, 2-amino-2-methyl-1-propanol, and monoethanolamine. A further process includes reacting CO2 with an amine selected from 2-aminocyclohexanol, cis-1,2-diaminocyclohexane, and meglumine.

The invention discloses a low-partial-pressure CO2 catalytic absorption method and application, and belongs to the technical field of gas separation. The low-partial-pressure CO2 catalytic absorption method comprises the following steps: S1, providing a nitrogen-doped activated carbon catalyst; the nitrogen-doped activated carbon catalyst is prepared by taking activated carbon as a carbon source and modifying the activated carbon through a nitrogen-containing reagent; s2, providing an organic amine solvent; and S3, under the action of the nitrogen-doped activated carbon catalyst provided in the S1, enabling flue gas to react with the organic amine solvent provided in the S2. Compared with the existing CO2 absorption method, the method provided by the invention has the advantages that the CO2 absorption rate, the CO2 absorption capacity and the CO2 capture efficiency can be remarkably improved, so that low-cost CO2 capture is realized.

The utility model provides a system for removing cations in organic amine by a freezing technology, which comprises a crystallization cooler arranged on a skid, a liquid inlet of the crystallization cooler is communicated with an outlet of a temporary storage tank for filtered organic amine solvent to be treated, and a freezing unit communicated with the crystallization cooler is arranged on the outer side of the crystallization cooler. According to the utility model, sodium ions in the organic amine liquid can be crystallized before the organic amine liquid enters the collecting tank, so that the problem that positive ions such as the sodium ions in the organic amine liquid are crystallized at positions such as a system pipeline, a heat exchanger, a tower plate and the like to cause blockage and influence the normal operation of the system is solved; the working efficiency of the system pipeline, the heat exchanger and the tower plate is greatly improved, the maintenance and cleaning frequency is reduced, and the operation is more convenient and efficient.

The present application relates to a kind of sulfur-dissolving composition, sulfur-dissolving agent and its application, belong to oil and gas field chemical technical field.The sulfur-dissolving composition of the present application includes high branched polymer, amino modified nanomaterial, organic amine solvent and inorganic base catalyst;The molecular chain end of the high branched polymer has at least 3 or more amino groups;The inorganic base catalyst is water-soluble sulfide salt and / or water-soluble sulfhydryl salt.The sulfur-dissolving composition of the present application has strong sulfur-dissolving capacity, and amino modified nanomaterial has selective solubility to sulfur particles, and has higher compatibility with organic amine solvent.Amino modified nanomaterial has higher specific surface area, and is dispersed in organic amine solution, to provide abundant active sites for reaction with sulfur particles, reaction area increases, and the solubility of sulfur is improved;At the same time, the strong adsorption of amino modified nanomaterial reduces the mass transfer distance between sulfur molecules, and greatly improves the solubility of sulfur.

A surface treatment composition of the present invention is a surface treatment composition that are supplied as a vapor to a surface of a wafer having an uneven pattern on the surface and used to form a water-repellent protective film on the surface, the surface treatment composition containing a silylating agent and a solvent, in which the silylating agent contains a trialkylsilylamine, the solvent contains at least one or more selected from the group consisting of glycol ether acetate and glycol acetate, and a total content of the glycol ether acetate and the glycol acetate is 50% by mass or more in 100% by mass of a total amount of the solvent.

The invention relates to a low-energy-consumption flue gas carbon capture absorbent based on a composite amine solvent and application thereof. The absorbent comprises main amine, auxiliary amine, an accelerant, sulfolane, an antioxidant, a passivator, a stabilizer and water. The mass percent of water in the absorbent is 50%-70%. According to the invention, the absorbent with high water content is covered, the content of main amine in the absorbent is obviously reduced, and the corrosion to equipment is reduced. The antioxidant, the passivator and the stabilizer are added, so that the regeneration energy consumption can be reduced, the viscosity of the absorbent is reduced, and the application scene is expanded.

The invention discloses an electrolyte based on an amido multi-element deep eutectic solvent, a preparation method and a sodium metal battery, and the electrolyte is prepared by the following steps: mixing a sodium salt, an amide solvent and a hydrogen bond acceptor according to a certain molar ratio, uniformly stirring until a clear transparent liquid is obtained, and then adding a certain amount of an additive into the clear transparent liquid to obtain the multi-element deep eutectic electrolyte. The multi-element deep eutectic electrolyte is formed based on the Na-O coordination effect of an amide solvent and a sodium salt and the hydrogen bond interaction of a hydrogen bond donor and a hydrogen bond acceptor. Wherein strong Lewis acid-base interaction endows the amide solvent with strong coordination ability with sodium metal ions, so that the coordination of Na < + > and anions is reduced, and the dissociation of sodium salt is promoted; and secondly, a hydrogen bond acceptor is introduced, so that the viscosity of the eutectic electrolyte is reduced, the activity of alpha-H and N-H in an amide solvent can be effectively weakened, the compatibility of the electrolyte and a sodium metal interface is improved, and a stable solid electrolyte interface layer is constructed. The electrolyte has the advantages of high ionic conductivity, wide electrochemical window, high safety and the like.

The application provides a black phosphorus-carbon composite material and a preparation method and application thereof. The preparation method comprises the following steps: reacting black phosphorus and carbon material in an organic amine solvent at 80-200 DEG C to obtain the black phosphorus-carbon composite material. The black phosphorus-carbon composite material is prepared by using a solvothermal method. The reaction condition is mild, the operation is simple, the equipment is simple, and the scale-up is easy. When the black phosphorus-carbon composite material is used as a negative electrode material of a lithium ion battery, the black phosphorus-carbon composite material has good rate and cycle performance.

The invention discloses a low-energy-consumption coal-fired flue gas trapping and systematic method based on a composite amine solvent, and relates to the technical field of coal-fired flue gas treatment. The method comprises the following steps: carrying out dust removal and cooling pretreatment on coal-fired flue gas, and introducing the coal-fired flue gas into a two-stage absorption tower from bottom to top; in the tower, the flue gas is sprayed by a lean amine solution before the first absorption section, and the lean amine solution contains methyldiethanolamine, piperazine and the balance of water; spraying by a semi-lean amine solution in the second absorption section; purified flue gas is discharged from the tower top, and the amine-rich solution is discharged from the tower bottom, heated by a heat exchanger and then enters a regeneration tower; the regeneration tower performs steam stripping regeneration by taking low-pressure steam generated by the triple-effect evaporation system as a heat source; after regeneration, the lean amine solution is cooled and returned to the first spraying layer, and the semi-lean amine solution is cooled and returned to the second spraying layer; carbon dioxide generated by regeneration is compressed and stored after being cooled and dehydrated. The method is mainly used for efficiently capturing carbon dioxide and remarkably reducing regeneration energy consumption in scenes such as coal-fired power plants.

The application provides a liquid-liquid phase separation carbon dioxide absorption and desorption system, which comprises an absorption tower, a desorption tower, a heat exchange device, a plurality of liquid-liquid separation pools, a plurality of two-phase mixing pools, a rich phase mixing pool and a lean liquid mixing pool. The absorption tower has a plurality of stages and is connected in series. The plurality of liquid-liquid separation pools and the plurality of two-phase mixing pools gradually decrease the flow of absorption liquid, the CO2 load and the viscosity. The CO2 rich phase of the rich phase mixing pool is subjected to heat-induced stratification and cold rich liquid shunting and then enters the desorption tower for regeneration. The CO2 lean liquid of the lean liquid mixing pool returns to the absorption tower for recycling. The absorption liquid is a lean water-based mixed amine solvent containing active ingredients, phase separation promoters, anti-viscosity additives and a small amount of water. The liquid-liquid phase separation carbon dioxide absorption and desorption system has low solvent viscosity after loading CO2, high absorption rate and capacity, concentrated CO2 rich phase, high desorption pressure, low liquid holdup of each unit, low energy consumption, small equipment size and reduced overall carbon capture cost.

This invention relates to the field of electrochemical technology and discloses a low-temperature fluorine-containing rechargeable magnesium battery electrolyte, comprising a magnesium salt, a main solvent, and a composite additive. The composite additive is a mixed solution of an amine solvent and a fluorinated ether solvent. The concentration of the magnesium salt is 0.1-1.0 mol / L, and the volume ratio of the main solvent to the composite additive is (2-3.3):1. The preparation method includes the following steps: S1: Weigh a certain amount of magnesium salt and dissolve it in the main solvent, stirring for 6-8 hours to form solution A; S2: Slowly add the fluorinated ether solvent to solution A in S1, stirring for 6-8 hours to form solution B; S3: Add the amine solvent to solution B in S2, stirring for 6-8 hours to obtain the low-temperature fluorine-containing rechargeable magnesium battery electrolyte. Its application: The application of a low-temperature fluorine-containing rechargeable magnesium battery electrolyte in rechargeable magnesium batteries. The technical solution of this invention can improve the reversible magnesium deposition and dissolution performance of the electrolyte, and also improve the performance of Mg at low temperatures. 2+ The transport dynamics and ionic conductivity.

The application discloses a kind of nanocomposite desulfurization and decarburization solvent and preparation method thereof, belong to natural gas desulfurization and decarburization technical field, including the following components: alcohol amine solvent 20wt%~65wt%, accelerator 5 wt%~40wt%, activating agent 5 wt%~20wt%, nanoscale oxide 0.1 wt%~1.5wt%, antifoaming agent 0.001 wt%~1wt%, corrosion inhibitor 0.0005 wt%~1wt% and the rest is water, total 100 wt%.The application has obvious applicability, avoids excessive removal of carbon dioxide, has obvious selective control advantage, through chemical absorption, physical absorption, nanoscale oxide mass transfer strengthening etc. Synergistic effect, can realize to meet the quality requirements of a kind of natural gas, while reasonably retaining carbon dioxide volume concentration in 2% (mol) ~3% (mol) range, can be popularized and applied to other industries similar gas desulfurization and decarburization.

The invention discloses a flue gas desulfurization and decarbonization integrated system. The system comprises an absorption tower, a carbon dioxide desorption tower and a bipolar membrane electrodialysis unit, wherein the bipolar membrane electrodialysis unit comprises a bipolar membrane electrodialysis device and a gas-liquid exchange membrane; according to the method, an alkaline organic amine solvent with high loading capacity and low volatility is selected for integrated absorption and gradient desorption, the solvent can be completely recycled, pure CO2 and SO2 product gases are obtained respectively, and the utilization modes of byproducts are diversified. The process provided by the invention can simultaneously achieve the effects of reducing pollution and reducing carbon, the process flow is simple, and the construction and operation costs are reduced.

The invention discloses a method for preparing high-purity lithium sulfide based on an organic amine solvent. The method comprises the following steps: reacting an anhydrous mixed solution containing elemental sulfur and metal lithium in a mixed state, removing a solvent through rotary evaporation after the reaction is completed, and washing and drying to obtain high-purity lithium sulfide, wherein the solvent in the anhydrous mixed solution is aprotic organic amine with nitrogen coordination atoms. The preparation method is simple in technological process, and the obtained lithium sulfide is high in purity, few in impurities and especially suitable for the high-end fields such as solid electrolyte.

The application discloses an infrared transparent chalcogenide glass solution which is prepared by dissolving chalcogenide glass and an organic amine solvent, wherein the organic amine solvent is an amine salt solvent containing a bifunctional group, a micro-network structure of the chalcogenide glass is formed by covalent bonding of chalcogen elements, modifiers and selectively added dopants, the chalcogen elements are S, Se or Te, the modifiers are at least one of Ge, Sb, In, Sn and As, and the dopants are at least one of Cd, Ag, CsCl, Bi, Cs and Cu, the micro-network structure of the chalcogenide glass is rich in MN a The glass solution has high transmittance and high refractive index in a wide infrared spectrum, has high light control capability, can be used for preparing an infrared liquid anamorphic lens, and is used in a middle and far infrared anamorphic imaging system, so that the imaging system is more integrated, and a new way is provided for the development of an infrared imaging system in the direction of light weight, small size and high performance.

The application discloses a kind of lead sulfide quantum dots with adjustable light absorption range, preparation method and application thereof.Sulfur source is dissolved in short-chain amine solvent, lead source and organic small molecule ligand solution dissolved in organic polar solvent are added, and then sulfur source solution is added, and the reaction is stirred at a temperature of 0-100 DEG C to obtain a reaction product;anti-solvent is added, and the product is washed and dried to obtain lead sulfide quantum dots with uniform particle size and adjustable light absorption range.By adjusting the content of precursor, reaction solvent and temperature, and under the action of n-butylamine, PbS quantum dots with adjustable light absorption range are directly synthesized in one step, which solves the limitations of small light absorption range and low yield of quantum dot ink direct synthesis, and obtains quantum dots with a light absorption range of 1000nm-2000nm wavelength.The synthesized quantum dots have achieved preliminary application in photoelectric detector.

A degradation inhibitor composition for stabilizing an amine solvent used in a post-combustion carbon capture process is provided. According to a preferred embodiment, the degradation inhibitor comprises: (a) Nitrilotriacetic acid (NTA); or (b) N-(2-hydroxyethyl) ethylenediamine-N', N', N"-triacetic acid (HEEDATA). A method of stabilizing an amine solvent used in a post-combustion carbon capture process using the degradation inhibitor compositions described herein is also provided.

The invention discloses a nano-composite desulfurization and decarburization solvent and a preparation method thereof, and belongs to the technical field of natural gas desulfurization and decarburization, the nano-composite desulfurization and decarburization solvent comprises the following components: 20-65 wt% of an alcohol amine solvent, 5-40 wt% of an accelerant, 5-20 wt% of an activator, 0.1-1.5 wt% of a nano-scale oxide, 0.001-1 wt% of an antifoaming agent, 0.0005-1 wt% of a corrosion inhibitor, and the balance of water, totaling 100 wt%. The method has obvious applicability, avoids excessive removal of carbon dioxide, has obvious selective regulation and control advantages, can meet the quality requirements of first-class natural gas through the synergistic effects of chemical absorption, physical absorption, nanoscale oxide enhanced mass transfer and the like, reasonably keeps the volume concentration of carbon dioxide within the range of 2% (mol)-3% (mol), and improves the quality of natural gas. The method can be popularized and applied to desulfurization and decarburization of similar gases in other industries.

The application discloses a kind of solid-state luminescent Schiff base two-dimensional covalent organic framework material and its preparation method and application, belong to material field.The preparation method of the solid-state luminescent Schiff base two-dimensional covalent organic framework material of the present application includes the following steps: the amine with C2 symmetry, DAD, solvent and acetic acid aqueous solution are mixed, and solvent thermal reaction is carried out, to obtain the solid-state luminescent Schiff base two-dimensional covalent organic framework material;The solvent is o-dichlorobenzene and n-butanol.The COFs material prepared in the application has high crystallinity and porosity, and the solid-state absolute luminescence quantum yield is as high as 39%.

The invention provides a desulfurization solvent for improving the carbonyl sulfide removal rate as well as a preparation method and application of the desulfurization solvent. The desulfurization solvent comprises the following components in parts by mass: 60-70 parts of an alcohol amine solvent, 10-15 parts of a desulfurization synergist and 8-10 parts of an antioxidant, wherein the alcohol amine solvent comprises a composition of N-methyldiethanolamine and organic steric hindrance amine; the desulfurization synergist is prepared from the following raw materials: TiO2 nanotubes and diethyl aminomalonate. The preparation method of the desulfurization solvent comprises the following steps: mixing the desulfurization synergist and the antioxidant to obtain a complexing agent; and mixing the alcohol amine solvent and the complexing agent to obtain the desulfurization solvent. The invention also provides application of the desulfurization solvent in removal of carbonyl sulfide in natural gas. The desulfurization solvent disclosed by the invention has a good removal effect on sulfides such as hydrogen sulfide and carbonyl sulfide, and also has relatively high capability of retaining carbon dioxide in purified gas.

The invention belongs to the technical field of electrochemical energy storage batteries, and particularly relates to a chlorine-free simple magnesium salt electrolyte for a magnesium-sulfur battery as well as a preparation method and application of the chlorine-free simple magnesium salt electrolyte. The electrolyte comprises magnesium salt, ionic liquid, an organic ether solvent, an amine solvent and an organic phosphide additive. The solvation structure is regulated and controlled through the synergistic effect of multiple components, the compatibility of the electrolyte with the sulfur positive electrode and the magnesium negative electrode is improved, and the electrochemical performance of the magnesium-sulfur battery is improved. Specifically, the amine solvent is used as a strong polar solvent to improve the solubility of the magnesium polysulfide, so that the diffusion and redox conversion kinetics of the magnesium polysulfide are promoted, and the organic phosphide is used as an additive to effectively improve the specific discharge capacity and voltage platform of the magnesium-sulfur battery. Meanwhile, due to the addition of the ionic liquid, the stability of a magnesium negative electrode / electrolyte interface is improved, the transmission capacity of Mg < 2 + > is enhanced, and the overpotential of magnesium deposition / dissolution is reduced. In addition, the electrolyte does not contain chloride ions, so that the corrosion problem caused by the chloride ions is avoided.

The invention discloses a preparation method of 2, 4-difluoroaniline, and belongs to the field of synthesis of difluoroaniline, the preparation method of 2, 4-difluoroaniline comprises the following steps: adding 2, 4-difluoro-5-chloronitrobenzene, organic amine, a solvent and a nickel-based catalyst into a high-pressure reaction kettle together, stirring and heating, then introducing hydrogen for reaction, and after the reaction is finished, layering and rectifying to obtain the 2, 4-difluoroaniline. 2, 4-difluoroaniline is added; the pressure in the high-pressure reaction kettle is 0.5 to 2.0 MPa. According to the method, the use of highly toxic reagents can be avoided, and the yield of the 2, 4-difluoroaniline is improved while the cost is reduced.

The invention belongs to the technical field of carbon dioxide, and provides carbonic anhydrase, application of carbonic anhydrase mimic enzyme to intensify absorption and desorption of CO2 by an organic amine solution, a device of carbonic anhydrase mimic enzyme, and an operation method.The device mainly comprises a gas cylinder module, a gas mixing module, a first heating device, an absorption tower, a first liquid storage tank, a first circulating pump, a second heating device and a third cooling device, a fourth cooling device, a second liquid storage tank, a second circulating pump, a third heating device, a desorption tower and a fifth cooling device. According to the method, CO2 with different concentrations is absorbed by the organic amine barren solution through the device filled with the catalyst and used for enhancing absorption and desorption of CO2 by the organic amine solvent, CO2 is removed by heating the regenerated barren solution at low temperature, high-efficiency desorption of CO2 can be realized at the low temperature of 60-90 DEG C, CO2 with the purity of more than 99 vol.% is obtained, and compared with a traditional MEA process, the desorption rate is increased by 52% or above, and the desorption rate is increased by 50% or above. And the energy consumption is reduced by more than 66%.

An aqueous solvent composition useful for CO2 capture is described, that includes one or more CO2-sorbing amines, e.g., an amino acid salt and a tertiary or a sterically hindered amine. The solvent composition may include one or more promoters that are effective to enhance solvent characteristics such as (i) CO2 sorption capacity, (ii) CO2 sorption rate, (iii) CO2 desorption capacity, (iv) CO2 desorption rate, and (v) regeneration temperature, in relation to a corresponding solvent lacking the promoters. In relation to existing CO2 capture solvent compositions, the disclosed aqueous solvent composition provides high solvent CO2 capacity, high rate of CO2 absorption and desorption, high thermal and oxidative stability, low solvent regeneration energy, low solvent emissions, and low solvent toxicity.

The application discloses an energy-saving and environment-friendly phase change CO2 capturing absorbent, which is prepared from a mixed solution of the following components in mass percentage: 20-30% of hydroxyethyl ethylenediamine, 20-30% of N-N diethylhydroxylamine and 50-60% of a solvent; the solvent is one of sulfolane, n-propanol, diethylene glycol dimethyl ether and dimethyl sulfoxide. The absorbent further comprises a nanoparticle reinforcing agent of iron oxide, and the nanoparticle reinforcing agent of iron oxide is added in an amount of 1.5-2.0% of the mass of the mixed solution. The CO2 absorbent in the application can increase the absorption capacity of CO2, improve the capture rate of CO2, reduce the regeneration energy consumption and improve the desorption effect, so that the energy-saving and environment-friendly treatment requirements of CO2 capture can be realized.

The application discloses a kind of low concentration CO2 catalytic absorption method, belong to gas separation technical field;The low concentration CO2 catalytic absorption method of the application, including the preparation of Lewis base catalyst in the surface of activated carbon loading alkali earth metal oxide MgO, CaO or BaO, and the absorption of low concentration CO2 by combining organic amine solvent with Lewis base catalyst;Compared with the existing CO2 absorption method, the application improves the amine-based solution absorption CO2 system, prepares the Lewis base catalyst with low cost, high catalytic activity, recyclable, improves CO2 absorption capacity and capture rate, speeds up CO2 absorption rate, can effectively reduce the investment cost of capture system, provides guidance and reference for the engineering design and construction of carbon capture link.