79results about How to "Reduce desorption energy consumption" patented technology

The invention provides a renewable flue gas desulphurization process. The renewable flue gas desulphurization process comprises an absorption process and a desorption process. In the absorption process, the following steps are sequentially carried out according to the flowing direction of flue gas: absorbing oxysulfide in the flue gas by using a half-lean solution to form a first pregnant solution; further absorbing the oxysulfide in the flue gas by using a lean solution to form a second pregnant solution; catching a desulfuration solution carried in the flue gas by using a detergent; and discharging clean flue gas. The desorption process comprises the following steps of: carrying out first desorption on part of the first pregnant solution to form a half-lean solution and desorption gases; simultaneously carrying out second desorption on part of the first pregnant solution and part of the half-lean solution to form a lean solution and desorption gases; condensing and recycling oxysulfide in the desorption gases; and respectively supplying the other part of the half-lean solution and the lean solution for the absorption process so as to realize the circulation of the desulfuration solution between the absorption process and the desorption process. The renewable flue gas desulphurization process is suitable for processing various oxysulfide-contained flue gases or industrial waste gases.

The invention relates to a mixed organic solution for trapping CO2 and SO2 acid gas through phase transformation, and belongs to the technical field of environmental protection and gas purification. The mixed organic solution is prepared from, by mass, 5-35 parts of organic amine absorbing agents and 65-95 parts of organic solvent; one of chain amines, diamines, steric hindered amines, alcohol amines and amides or mixtures of more than two of chain amines, diamines, steric hindered amines, alcohol amines and amides which are mixed in any proportion is / are adopted as the organic amine absorbing agents; one of alcohols, ethers, ketones and esters or mixtures of more than two of alcohols, ethers, ketones and esters which are mixed in any proportion is / are adopted as the organic solvent. The mixed organic solution aims at solving the problem that regeneration energy consumption is high in decarbonizing and desulfurizing of an organic amine regeneration method.

The present invention provides a process method for absorbing SO2 by using a renewable eutectic solvent. The process method comprises: absorbing SO2 in flue gas at a certain absorption temperature by using an eutectic solvent formed from a quaternary ammonium inner salt hydrogen bond acceptor and a hydrogen bond donor according to a certain ratio as an absorbent, and regenerating the eutectic solvent and recovering the SO2 at a certain temperature by using a steam stripping or flash evaporation method. According to the present invention, the biodegradable, non-toxic and environmentally friendly eutectic solvent is used as the absorbent to rapidly and efficiently absorb the SO2 in the flue gas and the regeneration of the absorbent and the resource utilization of the SO2 are achieved, such that the poisoning of the absorbent on the environment is reduced, and the formation of the absorption by-product is avoided.

The invention provides a flue gas absorbent of desulfurization and denitrification and a desulfurization and denitrification method thereof. The flue gas absorbent of desulfurization and denitrification is prepared from the following components in percentage by weight: 2%-40% of an absorbing component, 0.02%-10% of an active component, 1%-20% of a reducing component, 0.001%-0.1% of an antioxidant and the balance of water, wherein the pH value of the absorbent of desulfurization and denitrification is 3.5-7; the absorbing component is one or more of piperazine and derivatives thereof; the active component is diazabicyclo; and the reducing component is urea. According to the flue gas absorbent of desulfurization and denitrification, provided by the invention, NOx in the flue gas can be effectively reduced into nitrogen, and SO2 is desorbed and regenerated after being absorbed, so as to obtain pure SO2. The flue gas absorbent of desulfurization and denitrification is high in desulfurization and denitrification rate, rapid to desorb, high in desorption rate, and relatively low in desorption energy consumption, and has high practicability.

The invention provides a low energy consumption desorption device. An electrode is used for coupling and electrifying an adsorption material and is directly conducted to the adsorption material through current to ensure that the desorption material generates a desorption effect and further ensure that the adsorption material maintains desorption capacity to continuously operate. By using the desorption device, the electricity consumption can be reduced and the material absorbed by the adsorption material is effectively removed. The invention also provides a dehumidifying device which can provide continuous dry air current; and moisture in air can be repeatedly removed to lower the humidity of the environment by using the dehumidifying device through removing the moisture absorbed by a regeneration absorbing material.

The invention belongs to the field of CO2 adsorption capturing, and more specifically relates to a deep eutectic solvent used for removing carbon dioxide in air and flue gas. The deep eutectic solventis composed of a hydrogen bond donor and a hydrogen bond acceptor; the hydrogen bond donor and the hydrogen bond acceptor are connected through hydrogen bonds so as to form the binary or the ternarydeep eutectic mixture, wherein the hydrogen acceptor is one selected from calcium chloride, ammonium chloride, calcium chloride dehydrate, and zinc chloride; the hydrogen donor is one or a mixture oftwo ingredients selected from ethanolamine, diethanolamine, triethanolamine, diethylenetriamine, N, N-dimethyl ethene diamine, 1, 5-diazabicyclo[4, 3, 0]-nonyl-5-ene. The deep eutectic solvent is prepared through stirring mixing at a temperature of 30 DEG C or higher, is capable of accelerating reaction speed with carbon dioxide, increasing absorption amount, reducing desorption energy consumption, and increasing carbon dioxide adsorption capturing efficiency effectively.

The invention discloses an absorbent for circularly absorbing sulfur dioxide gas in tail gas of natural gas and an application of the absorbent. The absorbent comprises the following components in percentage by mass: 30-60wt% of cyclic tertiary amine compounds, 5-10wt% of a desulfurization fortifier, 10-30wt% of a latent solvent, 0.5-3wt% of an activating agent, 1-2wt% of an antioxidant, 0.5-2wt% of a corrosion inhibitor and the balance of water. The application refers to applying the absorbent to removal of the sulfur dioxide gas in the tail gas of the natural gas at an absorption temperature of 20-70 DEG C. According to the invention, by utilizing the structure characteristics of the cyclic tertiary amine compounds which are high in sulfur dioxide absorption capacity and low in desorption energy consumption, and adding corresponding auxiliary agents at the same time, the absorption of absorption liquid to sulfur dioxide has high efficiency and specificity; and the absorbent can selectively remove SO2 from the tail gas of the natural gas, so as to greatly reduce the gas purification cost, and facilitate follow-up utilization of recycled acid gas.

The invention discloses a thermo-sensitive solid amine fiber material as well as a preparation method and application thereof. The thermo-sensitive solid amine fiber material is prepared by introducing amine and thermo-sensitive functional groups to the surface of base fiber through synthesis. By adopting the fiber material, the water absorption rate of the material can be changed and controlled by adjusting the change of ambient temperature, and the fiber material can be also controlled to have different water absorption rates by regulating and controlling different mole ratios of thermo-sensitive groups to amino. The fiber material can be applied to the field of intelligent special fiber products or the field of CO2 adsorption, the highest adsorption capacity of the fiber material to CO2 at 35 DEG C and 40 DEG C can be up to 3.8mmol / g, and moreover, CO2 can be completely desorbed at 70 DEG C within 30 minutes after being adsorbed by using the fiber material, so that the thermo-sensitive solid amine fiber material has the advantages of low desorption energy consumption and rapid desorption velocity.

The invention relates to a reproducible polytertiaryamine sulfur dioxide absorbent and a preparation method thereof. The absorbent comprises the following components: (1) polytertiaryamine having a mass concentration in the range from 1% to 80%, which is taken as the major component of the absorbent, wherein the polytertiaryamine exists in a solution in the form of unionized polytertiaryamine, partially ionized quaternary ammonium salt and completely ionized quaternary ammonium salt due to addition of an acid difficult to volatilize; (2) a phenol or quinone material having a mass concentration in the range from 0.01% to 1%, which is used as an antioxidant of the absorbent; (3) 1-50wt% of acid difficult to volatilize, which is used as the cosolvent and stabilizer for the polytertiaryamine; (4) 0.1-10wt% of monoalcohol amine, which is used as an activator of the absorbent; (5) 10-90wt% of water. The absorbent absorbs sulfur dioxide in mixed gases at a low temperature and releases the absorbed sulfur dioxide gas at a high temperature to generate a sulfur dioxide by-product having a dry basis concentration greater than 99%; the absorbent can be recovered and reused.

The invention discloses a nitrogen azole metal salt absorbent solution for acid gases and application thereof. The nitrogen azole metal salt absorbent solution comprises, by weight percent, 1-50% of nitrogen azole metal salt and the balance polarity good solvent. The nitrogen azole metal salt is one or optional mixture of imidazolium salt, triazole salt, and tetrazole salt. The polarity good solvent is one of or optional mixture of polyethylene glycol, polypropylene glycol, water, dimethyl sulfoxide, sulfolane, ethylene carbonate, propylene carbonate, glycerol, and polyglycerol. The invention further discloses an application method of the nitrogen azole metal salt absorbent solution for the acid gases. The nitrogen azole metal salt absorbent solution is mainly used for absorbing and separating the acid gases such as CO2, SO2 and H2S, and has the advantages of low cost, high absorption amount, fast absorption / desorption, low desorption energy consumption, high selectivity, reusability and the like.

The invention provides a method for preparing a solid amine CO2 adsorption material based on nano-silica dipping. According to the method, precipitation-process nano-silica which is cheap and has a large-scale industrial supply source is used as a substrate, polyethyleneimine with high thermal stability and high content of amido groups is loaded on the substrate through wet dipping, so the solid amine CO2 adsorption material with high thermal stability and cyclic adsorption stability is prepared. The material is applicable in a temperature range of 25 to 150 DEG C which well covers the temperature range of typical flue gas, so the material can be stably applied to capture of CO2 in flue gas; the material also has the characteristic of low energy consumption in desorption and can realize desorption of CO2 under the condition of 1.8 * 10<6> kJ (wherein delta T is equal to 15 DEG C), and energy consumption of the material is 40% of the energy consumption of a 30% MEA aqueous solution CO2 absorption system (wherein delta T is equal to 40.56 DEG C).

The invention relates to a desulfurization method for purifying flue gas. The desulfurization method comprises the following steps: removing ash, dust, fluorine, chlorine and bromine which are possibly contained in the flue gas from the flue gas by passing through a pre-washing tower; absorbing sulfur dioxide in purified gas through a desulfurizer barren solution by passing through an absorption tower; converting the barren solution into a pregnant solution, wherein the gas out from the absorption tower meets a waste gas emission standard; performing thermal desorption on the pregnant solution after the pregnant solution exchanges heat with barren solution out from a desorption tower; and releasing the sulfur dioxide in the pregnant solution, wherein mixed gas out from the desorption tower can be used as a chemical raw material after being dewatered, the desulfurizer is an ionic solution which contains an ionic liquid and an ionic solvent. According to the sulfur dioxide removal process which takes the ionic solution as a cycle gas cleaning solvent, the equipment corrosion can be reduced, the solvent consumption amount is reduced, the power consumption is reduced, and the operating cost is reduced. The ionic solution can adsorb a large amount of sulfur dioxide, and is easy to desorb and high in recycling stability.

The invention belongs to the field of carbon dioxide capture and separation, and in particular provides application of tri-(2-aminoethyl) amine as a carbon dioxide absorbent. Compared with the traditional absorption solvent, the performance of absorbing CO2 of the tri-(2-aminoethyl) amine provided by the invention is superior to that of the traditional absorption solvent (such as mono ethanol amine), and the tri-(2-aminoethyl) amine has the advantages of larger absorption capacity and quicker absorption speed.

The invention belongs to the technical field of separation, and discloses a membrane for desorbing CO2 from a solution containing CO2 and a preparation method of the membrane. The membrane for desorbing CO2 from the solution containing CO2 comprises a base membrane and a polydimethylsiloxane membrane with an active group, wherein the active group is an ester group or an amino group; the thickness of the polydimethylsiloxane membrane is 10-70 microns. The preparation method comprises the following steps: mixing the polydimethylsiloxane and an active crosslinking agent, coating the mixture on the base membrane, and crosslinking and curing at a certain temperature to form the membrane. According to the membrane for desorbing CO2 from the solution containing CO2, the solution absorbing CO2 is one of methanol, acetone, polyethylene glycol dimethyl ether, propylene carbonate, dimethyl carbonate, diethyl carbonate and butyl succinate; the permeation flux of the membrane is up to 0.2-1.1 kg / (h*m2), and the enrichment factor is up to 23-50.

The invention discloses a solar thermal assisted temperature swing adsorption carbon trapping system. The solar thermal assisted temperature swing adsorption carbon trapping system comprises a solar heat collecting unit and a temperature swing adsorption carbon trapping unit, wherein the temperature swing adsorption carbon trapping unit comprises a solar heat collector, a heat storage device, an oil storage tank, a heat conducting oil pump and the like; the temperature swing adsorption carbon trapping unit comprises a gas booster pump, an electronic control valve, a four-way reversing valve, a working medium pump, at least one group of double adsorption reaction tower structures and the like. The solar heat collecting unit can provide all heat for a desorption process of the temperature swing adsorption carbon trapping unit; in addition, by adding the heat storage device, the stability of providing the desorption heat can be guaranteed; the temperature swing adsorption carbon trapping unit adopts a circulation mode of double reaction towers, so that the continuity of the temperature swing adsorption carbon trapping process can be guaranteed, and the gas production rate is improved; the desorption energy consumption of temperature swing adsorption carbon trapping is remarkably lower than that of chemical adsorption carbon trapping; the solar thermal assisted temperature swing adsorption carbon trapping system has universality for allocation of solar energy.

The invention relates to a partitioned multi-stage circulating CO2 trapping and concentrating method based on mass transfer-reaction regulation and control. The method adopts multi-element means such as multi-stage cycle absorption, intelligent multi-factor regulation, pre-washing cooling, inter-stage cooling, post-stage water washing, slurry cleaning, cooling water waste heat utilization, small-particle-size high-density spraying and the like. The method takes low cost, low energy consumption, stability and high efficiency as optimization targets, the generation of secondary pollutants is effectively inhibited while CO2 is efficiently trapped, and high-efficiency trapping, low-energy-consumption desorption and high-purity concentration of CO2 are realized. Aerosol removal is sequentially carried out from top to bottom through multi-stage circulation, the carbon capture efficiency is improved, the absorption rate and rich solution concentration are maintained, and the carbon emission reduction cost is reduced.

The invention relates to a method using a high-viscosity absorbent to separate CO2 based on a dissolution assisting effect and belongs to the technical field of gas separation and the field of environment protection. The method is characterized in that due to the dissolution assisting effect of amine, a novel absorbent can be obtained by mixing an organic solvent which does not dissolve in water with the high-viscosity amine absorbent; the novel absorbent reacts with to-be-separated CO2, the novel absorbent forms liquid-liquid phases or liquid-solid phases due to the fact that the amine is reduced during the reaction and the dissolution assisting effect is weakened, and the two phases are respectively a CO2-loaded rich phase and a CO2-loaded poor phase; desorption is performed only on the CO2-loaded rich phase to obtain CO2; the absorbent after the desorption is mixed with the CO2-loaded poor phase to perform circulation absorption. The method has the advantages that the viscosity of the absorbent is lowered during the absorption, the concentration of the absorbent is increased during the desorption, the treatment quantity of a desorption unit is reduced, water evaporation amount and temperature rising energy consumption are lowered, and the high-viscosity absorbent can be used to separate the CO2 with low energy consumption.

The invention discloses a carbon nannotube adsorption component as well as a preparation method and application of the carbon nannotube adsorption component. Carbon nanotubes of the carbon nannotube adsorption component grow at one side of each metal wire mesh belt, a strip-shaped structure is formed at the side by arranging the sides, not provided with carbon, of the metal wire mesh belts at intervals; upper and lower outer layers of the strip-shaped structure are packaged by using filter cloth, and the whole strip-shaped structure is strip-shaped and can be wound; when being wound to form acylindrical structure, the strip-shaped structure has the height-to-diameter ratio of 1:1 to 1:5; and a carbon nannotube adsorption device applying the carbon nannotube adsorption component is internally filled with the carbon nannotube adsorption component, the void ratio of a bed layer of the component is 70-95%, and no gas or liquid distribution devices are arranged in the device. The inventionfurther discloses a preparation method of the carbon nannotube adsorption component and a mounting method of the carbon nannotube adsorption device; it is not needed that the carbon nannotube adsorption device is additionally provided with an independent gas or liquid distribution device, and the carbon nannotube adsorption device can be used for adsorbing and rapidly desorbing organic matters inwastewater or gases; and the carbon nannotube adsorption component has the advantages such as firm structure, long service life, high throughput, low preparation cost and low treatment energy consumption.

The invention discloses a temperature swing adsorption carbon-capturing system utilizing microwave heating to assist in desorption process. The temperature swing adsorption carbon-capturing system comprises a temperature swing adsorption carbon-capturing unit, a microwave desorption unit and a cooling unit, wherein the carbon-capturing unit comprises an air compressor, two electric control valves,two adsorption towers and one four-way reversing valve; the microwave desorption unit comprises microwave heating devices respectively arranged on the two adsorption towers; the two adsorption towersare each wrapped with a heat-insulation layer; the cooling unit is composed of a cooling tower, a water pump and an electric-control three-way valve; and the microwave desorption unit provides the temperature swing adsorption carbon-capturing unit with heat required in the desorption process and has the advantages of high heating speed and high energy utilization rate. The system of the inventionhas an adsorption temperature of 20-35 DEG C and a desorption temperature of 110-130 DEG C, and ensures the maximum adsorption capacity of zeolite 13X; and the circulation mode of two or more reaction towers is utilized, so the continuity of the process of temperature swing adsorption carbon capturing can be ensured, the capturing rate of carbon dioxide is increased, and industrial production isfacilitated.

The invention provides a decarbonizing composition for flue gas. The decarbonizing composition comprises, by weight, 4-50 parts of main absorbing agent, 0.5-20 parts of activating agent, 0.5-5 parts of antioxidant and 25-95 parts of water, wherein the main absorbing agent is diazabicyclooctane; the activating agent is selected from one or more of diethylene triamine, triethylene tetramine, tetraethylene pentamine and triethylene diamine. The decarbonizing composition has the advantages that the diazabicyclooctane is used as the main absorbing agent, the diethylene triamine, the tetraethylene pentamine, the triethylene tetramine or the triethylene diamine is used as the activating agent, the main absorbing agent, the activating agent and components such as the antioxidant are combined according to a specific proportion to form the decarbonizing composition, and accordingly the decarbonizing composition is good in carbon dioxide removing effect, high in CO2 absorbing capacity, high in desorption rate and low in desorption energy consumption.

The invention discloses an oxidation inhibitor, a carbon dioxide absorbent and a carbon dioxide absorption method thereof. The carbon dioxide absorbent comprises a mixed aqueous solution of ethanolamine (MEA) and sulfolane (TMS) and an oxidation inhibitor, wherein the oxidation inhibitor is selected from glycerol, D-sorbitol, xylitol and erythritol; and MEA and TMS account for 25%-50% and 20%-50%respectively, and the content of the oxidation inhibitor is greater than 0 and less than or equal to 10%. The method comprises the following steps: adding the carbon dioxide absorbent into an absorption tower for an absorption reaction with carbon dioxide gas to form a carbon dioxide absorption liquid; enabling the carbon dioxide absorption liquid to enter a phase splitter for standing and layering to form an enriched phase enriched with carbon dioxide and a lean carbon dioxide absorption phase; and enabling the enriched phase to enter a desorption tower to desorb high-purity carbon dioxide, and returning the absorption phase to the absorption tower as the carbon dioxide absorbent to continuously participate in the absorption reaction. The method has the advantages of good absorbent oxidation inhibition, high carbon dioxide absorption efficiency and the like.

The invention discloses absorption liquid for trapping H2S through phase change for the problem that the existing H2S absorption liquid is high in energy consumption in desorption and low in sulfur resource utilization rate and the like. The absorption liquid is prepared from organic amine and organic solvent, and is used for absorbing H2S gas to achieve the liquid-liquid or liquid-solid split-phase effect. The H2S rich phase is sent into a regeneration tower to heat and desorb, the H2S lean phase can cyclically absorb H2S after being recycled without any processing treatment, the treatment quantity of the solution in the desorption is reduced, and the desorption energy consumption is lowered, wherein the distribution ratio of the H2S in the rich phase can achieve 93% or more, and the absorption liquid is appropriate to be used as a chemical absorbent for trapping H2S in the natural gas, the coal gas and refinery gas and the like, and belongs to the technical fields of the energy conservation and emission reduction and gas purification.

The invention relates to a liquid-liquid phase change absorbent for separating acid gas. The absorbent comprises the following components in percentages by mass: 10-60% of ethanolamine, 20-60% of other water-soluble organic compounds and 10-70% of water. Before the liquid-liquid phase change absorbent absorbs acid gas, the liquid-liquid phase change absorbent is a homogeneous-phase body, and after the liquid-liquid phase change absorbent absorbs acid gas, the liquid-liquid phase change absorbent forms into liquid-liquid phase spontaneously; the upper liquid phase is a barren liquor phase which loads acid gas, the lower liquid phase is a rich liquor phase which loads acid gas, and only the rich liquor phase enters a desorption unit, so that desorption energy consumption is reduced. After the liquid-liquid phase change absorbent absorbs acid gas, the liquid-liquid phase change absorbent forms into liquid-liquid phase for facilitating separation; according to characteristics of the absorbed acid gas, ratio of the absorbent can be adjusted for adapting to optimal volume ratio of the upper liquid phase and the lower liquid phase and load capacity of the absorbent in the process, so that amount of the rich liquor phase which enters the desorption unit in industrial environment is reduced, and energy consumption in the desorption process is reduced as possible.

The invention discloses an organic waste gas recycling device. The device comprises an adsorption fan, a dust removal filter, a first heat exchanger, an adsorption / desorption device, a nitrogen production unit and a low-temperature liquid storage tank, which are sequentially connected, the first heat exchanger is also connected with an oilless air compressor; the oilless air compressor is connected with a second heat exchanger; the low-temperature liquid storage tank and the first refrigerating unit are respectively connected with the second heat exchanger; a plurality of adsorption / desorptioncavities are formed in the adsorption / desorption device; electric heating plates are arranged on the two sides of each adsorption / desorption cavity. The organic waste gas recycling method comprises the steps of dehydration before adsorption, low-temperature adsorption, thermal-storage desorption under protective gas, recovery through pressurized condensation, and active cooling adsorption tower treatment. According to the device and the method, the cost and the energy consumption of the waste gas recycling device are reduced, and meanwhile, the waste gas recycling efficiency is improved.

The present invention provides a process method for absorbing SO2 by using a renewable eutectic solvent. The process method comprises: absorbing SO2 in flue gas at a certain absorption temperature by using an eutectic solvent formed from a quaternary ammonium inner salt hydrogen bond acceptor and a hydrogen bond donor according to a certain ratio as an absorbent, and regenerating the eutectic solvent and recovering the SO2 at a certain temperature by using a steam stripping or flash evaporation method. According to the present invention, the biodegradable, non-toxic and environmentally friendly eutectic solvent is used as the absorbent to rapidly and efficiently absorb the SO2 in the flue gas and the regeneration of the absorbent and the resource utilization of the SO2 are achieved, such that the poisoning of the absorbent on the environment is reduced, and the formation of the absorption by-product is avoided.

The invention belongs to the technical field of gas separation and purification, and concretely relates to a flue gas desulfurization agent, a preparation method thereof, and a desulfurization method.The technical problems to be solved by the present invention comprise low desulfurization rate and low desorption rate of existing desulfurization agents. The flue gas desulfurization agent comprises5-50 parts by weight of a main absorbent, 0.1-20 parts by weight of an activator, 25-95 parts by weight of water, and an acid; the addition amount of the acid makes the pH value of the flue gas desulfurization agent be 4.0-5.0; the main absorbent is diazabicyclooctane; and the activator is at least one selected from hydroxyethylethylenediamine, diethylenetriamine, tetraethylenepentamine, triethylenetetramine and triethylenediamine. The flue gas desulfurization agent has the advantages of good sulfur dioxide absorption effect, high absorption speed, high absorption capacity, high desorption rate and low energy consumption in desorption, and has a desorption rate of 93.91-99.56%.

The invention belongs to the technical field of gas separation and purification, and concretely relates to a sulfur dioxide removal composition, and a preparation method and a desulfurization method thereof. The technical problems to be solved by the present invention comprise low desulfurization rate and low desorption rate of existing desulfurization agents. The sulfur dioxide removal composition comprises 5-50 parts by weight of a main absorbent, 0.1-20 parts by weight of an activator, 0.05-5 parts by weight of a corrosion inhibitor, 25-95 parts by weight of water, and an acid; the additionamount of the acid makes the pH value of the sulfur dioxide removal composition be 4.0-5.0; the corrosion inhibitor is composed of a metal oxide and monooleic acid imidazoline; the main absorbent isdiazabicyclooctane; and the activator is at least one selected from hydroxyethylethylenediamine, diethylenetriamine, tetraethylenepentamine, triethylenetetramine and triethylenediamine. The sulfur dioxide removal composition has the advantages of good sulfur dioxide absorption effect, high absorption speed, high absorption capacity, high desorption rate and low energy consumption in desorption, and has a desorption rate of 94.08-99.28%.

The invention belongs to the technical field of separation, and discloses a membrane for desorbing CO2 from a solution containing CO2 and a preparation method of the membrane. The membrane for desorbing CO2 from the solution containing CO2 comprises a base membrane and a polydimethylsiloxane membrane with an active group, wherein the active group is an ester group or an amino group; the thickness of the polydimethylsiloxane membrane is 10-70 microns. The preparation method comprises the following steps: mixing the polydimethylsiloxane and an active crosslinking agent, coating the mixture on the base membrane, and crosslinking and curing at a certain temperature to form the membrane. According to the membrane for desorbing CO2 from the solution containing CO2, the solution absorbing CO2 is one of methanol, acetone, polyethylene glycol dimethyl ether, propylene carbonate, dimethyl carbonate, diethyl carbonate and butyl succinate; the permeation flux of the membrane is up to 0.2-1.1 kg / (h*m2), and the enrichment factor is up to 23-50.

The invention discloses a nitrogen azole metal salt absorbent solution for acid gases and application thereof. The nitrogen azole metal salt absorbent solution comprises, by weight percent, 1-50% of nitrogen azole metal salt and the balance polarity good solvent. The nitrogen azole metal salt is one or optional mixture of imidazolium salt, triazole salt, and tetrazole salt. The polarity good solvent is one of or optional mixture of polyethylene glycol, polypropylene glycol, water, dimethyl sulfoxide, sulfolane, ethylene carbonate, propylene carbonate, glycerol, and polyglycerol. The invention further discloses an application method of the nitrogen azole metal salt absorbent solution for the acid gases. The nitrogen azole metal salt absorbent solution is mainly used for absorbing and separating the acid gases such as CO2, SO2 and H2S, and has the advantages of low cost, high absorption amount, fast absorption / desorption, low desorption energy consumption, high selectivity, reusability and the like.

The invention discloses a method for mixing amido ionic liquid and ethanol amine in a micro-channel for adsorbing carbon dioxide, and belongs to the technical field of adsorption and separation. The operation conditions of a micro-channel reactor is that temperature is 25DEG C, and pressure is 1atm; carbon dioxide and absorbent are respectively conveyed to a gas inlet and a liquid inlet accordingto set speed, and gas and liquid have the same flowing direction; a gas phase and a liquid phase are in full contact in the micro-channel, and the carbon dioxide is adsorbed; the mass ratio of the amido ionic liquid to the ethanol amine in the absorbent is 1:9-3:7. A gas phase speed change range is 0.0187-0.187m.s<-1>, and a liquid speed change range is 0.0285-0.285 m.s<-1>. The adsorbent which adsorbs the carbon dioxide can be re used after being desorbed. Therefore, the problems of energy consumption and environment pollution can be effectively solved.