244 results about "Co2 absorption" patented technology

The invention relates to a CO2 absorbent with high cycle capacity and high cycle stability and application of the CO2 absorbent, and belongs to the technical field of atmospheric CO2 pollution treatment in the environmental protection industry. The CO2 absorbent is a polyamide-amine dendritic polymer (represented by PAMAM-2 (2 + G) NH2, G is the algebra, and 2 (2 + G) is the number of terminal amino groups), wherein primary amino is used as a terminal group, alkylene diamine is used as a core, and the algebra G is 1-5. The polyamidoamine dendritic polymer provided by the invention has the advantages of high-density terminal amino groups, high CO2 absorption capacity, large circulation capacity and high circulation absorption stability.

The invention discloses a bimetallic-based catalyst for promoting CO2 absorption-desorption cycle of an alcohol amine solution as well as a preparation method and application of the bimetallic-based catalyst, an MCM-41 molecular sieve with a high specific surface area and an ordered mesoporous structure is taken as a carrier, Zr (SO4) 2 and copper acetylacetonate are loaded as bimetallic active components, the catalyst has a proper acid site and good surface acidity, and the catalyst can be applied to CO2 absorption-desorption cycle of an alcohol amine solution. The decomposition of bicarbonate ions is accelerated, the fracture bond energy of C-N is reduced, the carbon dioxide desorption performance of MEA and a water-poor system is enhanced, and the energy consumption is reduced. Compared with the prior art, the molecular sieve catalyst is synthesized by adopting a one-step hydrothermal method, and the process is simple; the catalyst is not only suitable for a traditional MEA aqueous solution, but also effective in a novel water-poor amine liquid system, and provides an energy-saving solution for different carbon capture processes. After the catalyst is subjected to five times of absorption-desorption cycles, the catalytic activity of the catalyst can still be kept at 90% or above of an initial value, and good cycle stability is shown.

The invention discloses a low-viscosity ternary eutectic solvent as well as a preparation method and application thereof, and belongs to the technical field of CO2 absorbents. The low-viscosity ternary eutectic solvent is composed of polyamine hydrochloride, steric hindrance amine and organic alcohol, the polyamine hydrochloride has multiple active amino groups and is used for guaranteeing the high CO2 absorption rate and absorption load of the ternary eutectic solvent, the steric hindrance amine can inhibit formation of a hydrogen bond network due to the unique steric hindrance structure, and the high CO2 absorption rate and absorption load of the ternary eutectic solvent are improved. The organic alcohol can be used as a viscosity regulating agent, active hydroxyl of the organic alcohol can promote proton transfer in a CO2 desorption reaction, and the CO2 desorption efficiency is enhanced. The ternary eutectic solvent provided by the invention can still maintain a low-viscosity homogeneous liquid state after absorbing CO2, can effectively reduce the reduction of mass transfer efficiency caused by high viscosity, influence on contact with a target compound, heat transfer efficiency and the like, and solves the ubiquitous problems of overhigh viscosity and insufficient regeneration efficiency of the existing DESs system.

This invention provides an absorption tower, comprising: an inlet section with a flue gas inlet; an absorption section above the inlet section, containing an absorbent bed and a reflux port; a scrubbing section above the absorption section, connected to the absorption section, containing a spray assembly and a liquid outlet; an outlet section with a flue gas outlet communicating with the scrubbing section at its upper end; and a recovery assembly including a connecting pipe, the first end of which is connected to the liquid outlet, and the second end of which is connected to the reflux port, to discharge liquid from the scrubbing section into the absorption section. The technical solution provided in this application solves the problems in related technologies where, when absorbent is introduced into a carbon dioxide absorption tower, some absorbent is released into the air with the flue gas, causing air pollution and absorbent loss.

The application belongs to the technical field of gas separation and carbon dioxide capture absorbent, and discloses a guanidinium-based deep eutectic solvent absorbent suitable for a wet environment, a preparation method thereof and CO2 capture application. The deep eutectic solvent takes 1-acetyl guanidine AG as a hydrogen bond acceptor and an alcohol amine compound as a hydrogen bond donor, and is formed into a uniform and stable liquid through heating and stirring. When the molar ratio of AG to MEA is 1:5.5 under the condition of 333.15 K and 1.0 bar, the system has a high CO2 absorption capacity, reaching 0.2278 g / g. When the water content is 10 wt%, the CO2 absorption capacity can be increased to 0.2456 g / g. The absorption rate is fast, and the absorption equilibrium can be approached in 20 min. The DESs have the characteristics of high CO2 absorption capacity, fast absorption rate, simple preparation method and good adaptability to a wet environment.

This technology provides a flow path that allows the electrolyte to be circulated according to its state. [Solution] The carbon dioxide concentrator comprises an absorption unit that absorbs carbon dioxide into an electrolyte, an electrochemical cell that generates carbon dioxide from the electrolyte, and a passage for flowing the electrolyte. The electrochemical cell comprises an anode, a cathode, an electrolyte membrane provided between the anode and the cathode, a first liquid chamber provided between the anode and the electrolyte membrane and supplied with the electrolyte, and a second liquid chamber provided between the electrolyte membrane and the cathode and supplied with the electrolyte. The passage includes a first passage that sends the electrolyte discharged from the second liquid chamber to the absorption unit and a second passage that returns it to the second liquid chamber, and the flow path of the electrolyte can be switched between the first passage and the second passage.

The invention discloses a fertilization method and system for improving CO2 absorption efficiency of greenhouse plants based on an SPAC system. The method comprises the following steps: acquiring moisture information and environment information of the greenhouse plants through a biological environment information acquisition module deployed in a greenhouse; according to the obtained moisture information and environment information, the current leaf water potential and the saturation vapor pressure difference are calculated; calculating the stomatal conductance of the plant by combining the soil water potential and the atmospheric pressure according to the calculated current leaf water potential and saturation vapor pressure difference; and regulating and controlling water and CO2 fertilization of the greenhouse plants according to the stomatal conductance of the plants. By means of the method, under the condition that the evaporation intensity is too high, plant water stress can be weakened, stomatal opening is promoted, stomatal conductivity and mesophyll conductivity are improved, CO2 absorption and utilization are promoted, the photosynthesis efficiency of greenhouse fruits and vegetables can be effectively improved, and plant growth and yield formation are promoted.

This document discloses a method for producing shape-defined aerogels, comprising the steps of providing a viscous liquid containing CO2-absorbing particles, transferring the viscous liquid into a metering device, feeding the viscous liquid into liquid nitrogen via the metering device to produce aerogels, and freeze-drying the aerogels to produce shape-defined aerogels. Furthermore, shape-defined aerogels, the use of a shape-defined aerogel, and a method for CO2 sorption are described.

The application provides a ship exhaust carbon dioxide capture system and method, which comprises the following: an exhaust pretreatment unit, which comprises at least an engine, an exhaust pretreatment tower and a fan; the exhaust port of the engine is connected to the air inlet of the exhaust pretreatment tower; the air outlet of the exhaust pretreatment tower is connected to a CO2 absorption unit through the fan; the liquid outlet of the exhaust pretreatment tower is connected to a solution dilution unit; the CO2 absorption unit comprises at least a first absorption tower and a first dissolving tank; the first absorption tower is connected to the first dissolving tank; the first dissolving tank is provided with a first stirrer; the first dissolving tank is further connected to a first calcium carbonate filling unit; the solution dilution unit comprises at least a ballast water tank and a solution dilution tank; the ballast water tank is connected to the solution dilution tank; and the first dissolving tank is connected to the solution dilution tank. The system can absorb CO2 in the exhaust and convert it into calcium bicarbonate solution, avoids the separation, compression and transportation of CO2, and has the advantages of compact structure, low operation energy consumption and no secondary pollution.

The present application relates to the technical field of CO2 capture, and discloses a composition for CO2 capture, and a method for CO2 absorption and desorption, wherein the composition comprises an organic amine and a thermal degradation inhibitor; the thermal degradation inhibitor is a non-ionic organic compound, and the non-ionic organic compound comprises at least one five-membered aromatic nitrogen heterocycle containing a pyrrole nitrogen. When the composition is used in CO2 absorption and desorption, the thermal degradation rate of the organic amine is greatly reduced, and the stability is good.

The invention belongs to the technical field of carbon dioxide capture, and discloses a mixed solvent for carbon dioxide absorption and a carbon dioxide absorption method. The invention relates to a mixed solvent for carbon dioxide absorption. The mixed solvent is prepared from 3-methylaminopropylamine, isobutylamine, pentamethyldiethylenetriamine and water, wherein the concentration of the 3-methylaminopropylamine is 1.5 mol / L, the concentration of the isobutylamine is 0.5 mol / L, and the concentration of the pentamethyldiethylenetriamine is 3 mol / L. According to the invention, MAPA with high activity of primary amine and regulation and control functions of secondary amine, IBA with a unique space structure and a high-efficiency phase-splitting agent PMDETA are compounded in a pure water phase according to a specific proportion, so that an unexpected synergistic effect is generated. The technical prejudice that the capacity must be sacrificed when the viscosity is reduced is successfully broken through. The data of the embodiment shows that compared with the closest 2M3P system, the preferable solvent has the advantages that the rich phase viscosity is greatly reduced by 60%, the absorption capacity of 4.07 mol / kg is still kept, and the desorption efficiency is remarkably improved.

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.

This invention discloses a selective CO2 capture device for industrial flue gas, relating to the field of industrial flue gas treatment and gas separation technology. The invention includes a distribution assembly, which comprises a distribution cylinder body. A rotating assembly is mounted on the inner wall of the distribution cylinder body. The rotating assembly includes a rotating support, and a gas storage assembly is mounted on the inner wall of the rotating support. A top cover is mounted on the top surface of the distribution cylinder body, and a driving arc block is mounted on the bottom surface of the top cover. A CO2 absorption assembly and a nitrogen absorption assembly are mounted on the outer wall of the distribution cylinder body. This invention uses the rotating assembly to drive the gas storage assembly to rotate, causing the driving arc block and the abutting arc block to periodically contact each other, thereby realizing a cyclic process of air intake to exhaust within the corrugated sleeve. The CO2 contained in the industrial flue gas is selectively absorbed by a solid amine adsorbent in the first reaction shell, and the nitrogen is selectively adsorbed by a carbon molecular sieve adsorbent in the second reaction shell, effectively achieving directional separation of gas components and improving gas purification efficiency and selective capture capability.

[Problem] To provide a manufacturing method for a carbon dioxide absorbed sludge fine powder that has high fluidity and serves as a binder of low carbon materials. [Solution] In the present invention, water is added to residual concrete or return concrete to obtain a slurry; sand and gravel are separated and removed to obtain sludge water; a fine sand component is separated and removed from the sludge water by a wet cyclone to obtain concentrated sludge water; and the concentrated sludge water is dewatered to obtain a sludge cake. The sludge cake is placed in a rotating drum into which heated air and high-concentration carbon dioxide are supplied, and the sludge cake is pulverized and dried while being caused to absorb the carbon dioxide to obtain a carbon dioxide absorbed sludge fine powder. Alternatively, the sludge cake is placed in the rotating drum, heated air is supplied, and the sludge cake is pulverized and dried to obtain a sludge fine powder. This sludge fine powder is exposed to high-concentration carbon dioxide to obtain a carbon dioxide absorbed sludge fine powder.

Conventionally, CO2 absorbents such as isophorone diamine are used, and the CO2 absorption process at low temperatures and the CO2 extraction process at high temperatures are carried out in separate tanks. However, once the CO2 absorbent such as isophorone diamine absorbs CO2 and solidifies (changes into carbamic acid), it becomes difficult to move it to the other tank, which presents a problem. [Solution] Even when CO2 absorbents such as isophorone diamine absorb CO2 and solidify (change into carbamic acid), the system does not require movement. By creating a (medium to high) vacuum inside the tank, the amount of air inside the tank is reduced, and the concentration of CO2 extracted from the carbamic acid increases accordingly.

The present application belongs to the technical field of carbon capture, and particularly relates to a method and system for reducing amine loss in the absorption process of carbon capture technology. The method comprises: (1) under the conditions of the presence of a catalyst and bubbling, performing first contact between acid gas and aqueous washing solution to obtain acidified water washing water containing micron-sized bubbles; (2) performing second contact between decarburized amine-containing purified gas and the acidified water washing water, the acidified water washing water absorbing the amine in the amine-containing purified gas to obtain amine-removed purified gas and water washing solution; and (3) dividing the water washing solution into two streams, one of which is subjected to regeneration treatment to obtain amine and is recovered, and the other of which is returned to the aqueous washing solution. The micron-sized bubbles and acid in the acidified water washing water are used to capture the amine-containing aerosol in the gas in the absorption section of the carbon dioxide absorption tower, and the partial pressure of the amine in the gas is reduced, thereby greatly reducing the amine loss in the absorption process of the carbon capture technology.

The application discloses a kind of without heating regeneration carbon dioxide normal temperature removal process and system, belong to natural gas decarburization field;A kind of without heating regeneration carbon dioxide normal temperature removal process, comprising the following steps:S1, raw material gas pretreatment;S2, CO2 absorption;S3, rich liquid flash evaporation;S4, lean liquid regeneration;S5, material circulation;The application is effectively solved by the absorption part of being set, the pain point that edge filler reaction is not sufficient, the low life of central filler;Can shake and scatter adhesion filler ball, clean filter hole impurity, avoid filter hole blockage, further improve gas-liquid mass transfer efficiency;Can buffer knock impact force, prevent that filler plate is damaged;Can effectively protect electric telescopic rod, and maintenance is convenient, need not to disassemble whole tower body, shorten maintenance cycle, guarantee production continuity;Can avoid liquid flooding, channeling phenomenon.

The present invention provides: a carbon dioxide absorbing liquid which has excellent carbon dioxide absorbing performance; a carbon dioxide absorbing liquid which is capable of easily desorbing carbon dioxide when the absorbing liquid is regenerated in addition to having the above-described carbon dioxide absorbing performance; a method for separating carbon dioxide and a method for separating and recovering carbon dioxide, each using the carbon dioxide absorbing liquid; and a device using the carbon dioxide absorbing liquid. The present invention relates to a carbon dioxide absorbing liquid which contains a solvent and a phosphine oxide compound represented by general formula (1) (wherein a, b, and c each represent an integer of 1 to 10, R1, R2, and R3 each independently represent an amino group or a hydroxy group, and at least one of R1, R2, and R3 is an amino group).

The invention belongs to the technical field of carbon dioxide capture and regeneration, and particularly relates to a magnetic nanofluid pseudo-homogeneous-microwave synergistic carbon dioxide desorption method. The invention provides an application of a nickel ferrite material as a catalyst in carbon dioxide absorption pregnant solution regeneration. According to the invention, the carrier-free and undoped spinel-type structure NixFe3-xO4 is used as a catalyst for carbon dioxide absorption rich liquid regeneration, and the catalyst has microwave absorption, catalytic activity and magnetic responsiveness. According to the desorption method provided by the invention, the nickel ferrite material forms a stable quasi-homogeneous dispersion system in the carbon dioxide absorption rich solution, and then under the conditions of low-temperature microwave radiation and stirring, the CO2 desorption load rate reaches more than or equal to 55% within 10-30 min, the desorption reaction rate is increased by more than or equal to 20% compared with that of traditional thermal regeneration, and the desorption time is reduced by more than half compared with that of traditional thermal regeneration.

This provides a new technology that enables the recovery of high concentrations of CO2 from low concentrations of target gases. [Solution] The CO2 recovery system (1) includes a dehumidifying tower (10) and a CO2 absorption tower (20). Both the dehumidifying tower (10) and the CO2 absorption tower (20) include a configuration that cools the pipe structure (tower body 11 or vent pipe 24), which has an open upper end, from bottom to top, and this cooling causes the (dry) air to move from top to bottom within the pipe structure.

The present application aims to provide a lean water composite alkanolamine absorbent for low-concentration CO2 capture, belonging to the technical field of green carbon capture, which is a composite system of mixed alkanolamine-organic physical solvent-water. By regulating the types and proportions of the components, the water content of the system and the solvent regeneration energy consumption are significantly reduced while ensuring high CO2 absorption capacity. The water content of the absorbent is not higher than 20%, and it exhibits good absorption performance under low partial pressure CO2 conditions. The desorption regeneration energy consumption is about 77% lower than that of the same proportion alkanolamine high water content MEA system (MEA:EG:H2O=0.2:0:9.8). In the absorption-desorption cycle process, the absorbent exhibits good cycle stability, and its CO2 absorption performance does not significantly attenuate after multiple cycles. The lean water composite alkanolamine absorbent is suitable for low-concentration CO2 separation application scenarios such as direct air capture.

The present disclosure relates to a method for removing carbon dioxide in Fischer-Tropsch synthesis tail gas, which makes the micro-bubble generator immerse in the carbon-rich liquid, and the Fischer-Tropsch synthesis tail gas generates a large number of micro-bubbles in the carbon-rich liquid through the micro-bubble generator, which can make the gas-liquid fully contact, and further improve the decarburization effect. At the same time, the reaction between the activator in the fresh decarburization liquid and the oxygen-containing organic matter in the Fischer-Tropsch synthesis tail gas can reduce the viscosity of each solution in the carbon dioxide absorption tower, and under the action of the micro-bubble generator, more micro-bubbles can be stably generated, which can accelerate the absorption rate of carbon dioxide and further improve the decarburization effect.

The invention discloses an anhydrous liquid-liquid phase change absorbent for carbon dioxide capture, and a preparation method and application thereof, and belongs to the technical field of carbon dioxide recovery. The invention relates to an anti-freezing agent which comprises the following components in percentage by weight: 20-30% of diglycolamine, 20-50% of dimethylethanolamine, 10-40% of dimethyl sulfoxide and the balance of a physical regulator. The anhydrous liquid-liquid phase change absorbent for capturing carbon dioxide in flue gas provided by the invention has the characteristics of high CO2 absorption capacity, short phase splitting time, high desorption rate and low CO2 rich phase viscosity after absorption, and the regeneration energy consumption of the absorbent can be greatly reduced. The optimal desorption temperature is 110 DEG C, the minimum regeneration energy consumption reaches 2.26 GJ / tCO2, the maximum desorption rate is 3.12 mmol CO2 kg <-1 > s <-1 >, the phase splitting time is 120-180 s, and the maximum CO2 absorption capacity can reach 3.23 mol / L.

The application belongs to the technical field of CO2 capture, and discloses a concurrent flow type CO2 low-resistance high-efficiency absorption device and method. The device comprises an absorption chamber and a water washing and demisting chamber. The top of the absorption chamber is provided with a flue gas inlet. The flue gas inlet is provided with a gas distributor. A plurality of spray layers are arranged below the gas distributor. A filler layer is arranged below each spray layer. Each spray layer is provided with an atomizing nozzle with an upward opening. The bottom flue gas inlet of the water washing and demisting chamber is communicated with the absorption chamber. The CO2 absorption device adopts a gas-liquid concurrent flow contact mode, can avoid flooding, and has a total pressure drop of less than 500 Pa, is not sensitive to gas-liquid ratio fluctuations, is suitable for large-flow flue gas scenes, and is stable in operation. The CO2 absorption device integrates a water washing and demisting function, has a compact structure, occupies a small area, and can also reduce independent equipment investment.

A breathing system that supplies air containing reduced oxygen levels includes a mask, a housing, a valve or other air flow restrictor, and one or more sensors that detect the amount of oxygen present in the system. A user breathes into the mask, after which the air is moved into the housing, and subsequently through an expandable reservoir after which the air can be re-breathed by the user. One or more sensors may be mounted to the user as well as contained within the housing. In the event that the amount of oxygen in the system's recirculated air falls below a predetermined level, the valve may be opened to allow ambient air containing higher levels of oxygen to enter the system. The system may contain a carbon dioxide scrub medium, as well as other filters to maintain desired characteristic of the air within the system.

The present invention relates to a carbon dioxide absorbent. Specifically, in order to complement a short gas / liquid contact time of an RPB device, the carbon dioxide absorbent includes: a first compound and a second compound including two different alkanolamines; and a third compound including a cyclic tertiary amine, in specified contents, thereby maintaining low heat of reaction and improving absorption capacity and absorption rate.

The utility model relates to the technical field of water vapor filtering, in particular to a carbon dioxide absorber with a water vapor filtering function, and solves the problem that the use is influenced by relatively high moisture of flowing gas in the carbon dioxide absorber due to relatively poor filtering effect caused by relatively short gas flowing channel in the prior art. A carbon dioxide absorber with a water vapor filtering function comprises a filter cartridge, the side face of the filter cartridge is communicated with an air inlet pipe, the interior of the filter cartridge is fixedly connected with a partition plate, an air outlet pipe penetrates through the side face of the filter cartridge, the bottom of the air outlet pipe is communicated with a filtering mechanism, and the bottom of the filter cartridge is fixedly connected with a cover plate. According to the utility model, the channel path for gas circulation is increased, so that the cooling and filtering effects of moisture in the gas are better, and the carbon dioxide absorber can be normally used without being influenced by the moisture.

The application discloses a kind of carbon dioxide drive injection well casing automatic pressure supplement device and automatic pressure supplement method, comprising: carbon dioxide storage tank;High-pressure injection pump, inlet is connected with the outlet of carbon dioxide storage tank, outlet is connected with the inlet of first tubing valve;Casing protection liquid storage tank;Reciprocating piston cylinder, one side of piston is A cavity, the other side of piston is B cavity;The end of reciprocating piston cylinder A cavity upper port is connected with the outlet of second tubing valve by first switch valve, the end of reciprocating piston cylinder A cavity lower port is connected with carbon dioxide absorption tank by second switch valve;The outlet of casing protection liquid storage tank is connected with the end of reciprocating piston cylinder B cavity upper port by third switch valve, the end of reciprocating piston cylinder B cavity lower port is connected with protection liquid injection pipeline by fourth switch valve, and the outlet of protection liquid injection pipeline is connected with the inlet of casing valve. Including gas injection, casing pressure supplement, piston reversing, circulating pressure increasing and the like steps. The application can accurately control casing differential pressure, reduce gas seal pipe column and packer leakage risk.

Provided is a technology that enables circulation of an electrolyte solution in a flow path according to the state of the electrolyte solution.　This carbon dioxide concentration device comprises: an absorption unit by which carbon dioxide is absorbed into an electrolyte solution; an electrochemical cell by which carbon dioxide is generated from the electrolyte solution; and a passage through which the electrolyte solution passes. The electrochemical cell comprises: an anode; a cathode; an electrolyte membrane provided between the anode and the cathode; a first liquid chamber which is provided between the anode and the electrolyte membrane and to which the electrolyte solution is supplied; and a second liquid chamber which is provided between the electrolyte membrane and the cathode and to which the electrolyte solution is supplied. The passage includes: a first passage through which the electrolyte solution discharged from the second liquid chamber is sent to the absorption unit; and a second passage through which the electrolyte solution is returned to the second liquid chamber. The flow path of the electrolyte solution is switchable between the first passage and the second passage.

Provided are a carbon dioxide absorbent including potassium ferrite powder, a carbon dioxide absorbing device including the carbon dioxide absorbent, and a carbon dioxide absorbing method including bringing the carbon dioxide absorbent into contact with carbon dioxide-containing gas.