2403results about "Combustible gas purification" patented technology

A direct air capture (DAC) of CO2 system includes a reaction reactor having a solid, amine-functionalized sorbent configured to sequester CO2 from air; an in-situ dual-function device configured as a CO2 conversion reactor and an exchange fluid regeneration device; and the exchange fluid, recirculating between the reaction reactor and the dual-function device, configured to capture the sequestered CO2 from the solid sorbent in the reaction reactor and release the captured CO2 in the conversion reactor, the exchange fluid including one or more amino acids.

The invention discloses a zeolite adsorption and desorption integrated treatment system, and particularly relates to the field of zeolite separation treatment, and the zeolite adsorption and desorption integrated treatment system comprises a process sensing module, a dynamic partition control module, a global optimization control module and a cooling regeneration module. According to the zeolite adsorption and desorption integrated treatment system, the problem of blind operation in the traditional technology is solved through the process sensing module, a data basis is provided for dynamic partition, the intelligent monitoring level is improved, and the performance of an adsorbent is fully exerted; the problem of non-uniform heat and mass transfer of a bed layer is effectively solved through the dynamic partition control module, the desorption heat utilization efficiency is improved, and meanwhile, the service life of an adsorbent is prolonged; a dynamic optimization function is constructed through the global optimization control module, energy consumption, solvent recovery income and stability are comprehensively considered, self-adaptive adjustment of operation parameters is achieved, the energy consumption is reduced while the processing efficiency is guaranteed, and the environmental benefits are remarkably improved.

The utility model provides a cyclically-operated carbon dioxide trapping device. A shell of the cyclically-operated carbon dioxide trapping device is connected with an air inlet pipeline, an air outlet pipeline and an exhaust pipeline; the shell is internally provided with a reaction box body, the reaction box body is provided with two reaction cabins, and each reaction cabin is internally provided with a fan, a heater and a carbon dioxide adsorption structure; the air inlet pipeline is connected to the air inlets of the two reaction cabins and is close to the draught fan, the draught fan is used for sucking indoor air into the corresponding reaction box bodies and enabling the indoor air to flow through the heater and the carbon dioxide adsorption structure, and the carbon dioxide adsorption structure is used for adsorbing carbon dioxide in the flowing air; the heater is used for heating flowing air and desorbing carbon dioxide adsorbed in the carbon dioxide adsorption structure; and the two reaction cabins alternately perform adsorption and desorption of carbon dioxide. The device is convenient to operate and can continuously and efficiently control the concentration of indoor carbon dioxide.

The invention discloses a charcoal nano lanthanum material capable of synchronously removing organic phosphorus and inorganic phosphorus, and belongs to the field of environmental functional materials. The adsorbent comprises biochar and nano lanthanum loaded on the biochar, wherein the biochar is bamboo biochar; the nano lanthanum is in a La (OH) 3 form, the particle size of the nano lanthanum is 1-250nm, and the loading capacity of the nano lanthanum is 3-20wt%; the pore diameter of the biochar nano lanthanum material is 1-30nm, and the specific surface area is 100-250m < 2 > / g. Compared with a biochar-loaded nano lanthanum composite material in the prior art, the composite material has the inorganic phosphorus adsorption performance and also has the organic phosphorus adsorption effect, and inorganic phosphorus and organic phosphorus can be synchronously removed. According to the charcoal nano lanthanum material, organic phosphorus is adsorbed and removed by regulating and controlling the defect form of lanthanum, especially organic phosphonate can be hydrolyzed and removed, meanwhile, large pore channels of bamboo charcoal are beneficial to diffusion of macromolecular organic phosphorus to action sites of lanthanum, and the adsorption and hydrolysis effects of lanthanum on the organic phosphorus are further enhanced.

The invention provides an inert gas generation system, and relates to the technical field of industrial gas production. The inert gas generation system comprises the following modules: a gas pretreatment module, an intelligent separation module, a dynamic purification module, a pressure regulation and control module, a quality analysis module, a safety control module and an energy efficiency optimization module, and the gas pretreatment module is used for removing particulate matters through an electrostatic dust collection device by adopting a multi-stage gradient filtering algorithm based on ambient air input, adjusting humidity by combining a dew point control technology, forming a standardized gas source and generating a standard gas source. Through combination of a multi-stage gradient filtering algorithm and a dew point control technology, collaborative treatment of particulate matters and humidity is realized, stable gas source input is formed, the reliability of a subsequent processing link is improved, membrane separation parameters are dynamically predicted by applying a convolutional neural network model, and the permeation efficiency of a hollow fiber membrane stack is optimized.

The invention discloses a preparation method and application of self-crosslinking hydrogel containing a capsaicin functional structure, and belongs to the technical field of dye adsorption materials. The capsaicin functional structure monomer is introduced into an acrylic acid system, so that the self-crosslinking of the hydrogel is realized, and meanwhile, the adsorption performance of the hydrogel is remarkably improved; mono-substituted capsaicin functional structure monomers containing carboxyl and sulfonic acid groups are used as components, a disubstituted capsaicin functional structure monomer with polyhydroxy and carboxyl is used as a cross-linking agent, the self-crosslinking hydrogel with multiple adsorption sites is successfully constructed through free radical polymerization, and the adsorption capacity and efficiency of the hydrogel are greatly improved. The hydrogel-based carbon material is obtained by carbonizing the self-crosslinking hydrogel containing the capsaicin functional structure, the adsorption performance of the hydrogel material is further improved, the obtained hydrogel-based carbon material can be desorbed and recycled in ethyl alcohol, and the service life of the hydrogel-based carbon material is prolonged. And the problem of secondary pollution of the existing hydrogel material in the acid / alkali desorption process is effectively avoided.

The invention discloses a carbon dioxide trapping method which comprises the steps of feeding, adsorption, material replacement, primary desorption and secondary desorption, in the material replacement step, after the replacement process of a single adsorption and desorption unit lasts for M, a valve of the adsorption and desorption unit is closed, and the replacement process is repeated after the replacement process is stopped for (N-1) M, n is the total number of the adsorption and desorption units arranged in parallel, in the process that a single adsorption and desorption unit stops running, the pipe chain conveyor continuously runs, the other adsorption and desorption units alternately carry out solid amine material replacement, and the replacement time and the stop time are equal; according to the two-stage desorption, carbon dioxide in a solid amine material is fully desorbed through high-temperature desorption and negative-pressure desorption, a plurality of adsorption and desorption units alternately perform replacement so that the equipment can continuously run, the efficiency of the carbon dioxide trapping process is improved by combining the two-stage desorption operation, and the cost loss caused by the vacuum period of the equipment in the trapping process is reduced. The invention further discloses a carbon dioxide trapping device.

Systems and methods for producing green hydrogen from a source material (e.g., biowaste) are contemplated. The source material is at least partially dehydrated to produce a dried intermediate and recovered water. The dried intermediate is pyrolyzed to produce syngas and a char. The recovered water is electrolyzed to produce oxygen and green hydrogen.

The invention relates to a corrosion and scale inhibitor for TRT and a preparation method of the corrosion and scale inhibitor, and relates to the technical field of chemical reagents. The corrosion and scale inhibitor is prepared from the following components in percentage by mass: 15 to 20 percent of morpholine, 25 to 30 percent of aminoethyl ethanolamine, 15 to 20 percent of 1-hydroxyethyl-2-undecylimidazoline onium salt, 12 to 18 percent of sodium polyaspartate, 8 to 12 percent of itaconic acid-allylsulfonic acid copolymer, 1 to 3 percent of alkyl glycoside and the balance of a mixture of water and glycerol in a mass ratio of 1 to (1 to 3). The corrosion and scale inhibitor disclosed by the invention can synchronously inhibit corrosion of an acid medium and scale deposition of salts such as NH4Cl and the like, and the corrosion inhibition rate and the scale inhibition rate are effectively improved.

The invention provides a separation and purification method of urokinase, and relates to the technical field of separation and extraction. The separation and purification method comprises the following steps: S1, regulating the pH value of male urine to 8.5, standing, and taking supernate; s2, mixing the supernate with an adsorption material, and eluting with an eluent to obtain a urokinase crude product solution; the adsorption material is a core-shell silica gel polymer, Fe3O4atSiO2-NH2 is taken as a core, and polystyrene is taken as a shell; the eluent is a sodium citrate buffer solution with the concentration of 0.5 to 0.15 M, acetonitrile with the concentration of 1 to 5 weight percent and EDTA (Ethylene Diamine Tetraacetic Acid) with the concentration of 0.5 to 1.5 mM; and S3, carrying out anion exchange column chromatography on the urokinase crude product solution, eluting with an eluent, and precipitating to obtain the urokinase. The urokinase prepared by the method has the advantages of high polymer urokinase content, high recovery rate and high activity yield.

The invention discloses a low-concentration carbon dioxide trapping system and method, and belongs to the technical field of gas separation and trapping. The system comprises an air filter, a zeolite adsorption rotating wheel, a desorption heater, a desorption fan, a centrifugal fan, a pressure swing adsorption module (at least comprising double towers), a vacuum pump, a CO2 storage tank, a rear-end purification and utilization system and a control system. According to the method, trapping is realized through pretreatment, first-stage adsorption concentration, desorption transfer, second-stage purification, collection and storage and circulating operation. The zeolite adsorption rotating wheel is used for adsorbing and concentrating low-concentration CO2, and then the low-concentration CO2 is purified through the pressure swing adsorption module, so that the problems of low low-concentration trapping efficiency and high energy consumption in the prior art are solved. The device has the advantages of high trapping efficiency, low energy consumption, continuous operation, wide application scene and the like, is suitable for trapping low-concentration CO2 in atmosphere and industrial tail gas, and provides an efficient technical scheme for carbon emission reduction.

A system for reconditioning contaminated water includes a plurality of filter tanks, each filter tank configured to hold a media mixture comprising media particles to which contaminants adhere when the contaminated water is pumped through the filter tanks and a feed water pump to pump the contaminated water through the plurality of filter tanks. The plurality of filter tanks are configured to form a multistage filter system for filtering the contaminated water at different contaminant particle sizes, and the feed water pump pumps the contaminated water through the multistage filter system in a continuous manner during a normal filtering mode.

The invention discloses an activated carbon anoxic pyrolysis and steam regeneration process method and device, and relates to the field of activated carbon regeneration. The process method comprises the following steps: S1, dehydration preparation: reducing the moisture content of a carbon layer to 45% through hydraulic conveying and negative pressure dehydration; s2, drying pyrolysis and air stripping, wherein a carbon layer is heated to 300-400 DEG C through circulating heating of superheated steam and tail gas; s3, steam activation: introducing 900 DEG C tail gas to raise the temperature of the carbon layer to 800-850 DEG C for activation reaction; and S4, cooling, namely sequentially cooling to 100 DEG C or below through steam and cold water to complete regeneration of the activated carbon. The energy efficiency utilization rate is excellent, the pore structure is fully recovered, the specific surface area, the polar group content and the adsorption performance of the regenerated activated carbon can be remarkably improved, and the service life of the activated carbon is prolonged.

The invention discloses a gas purification real-time monitoring method, system and device and a medium, and belongs to the technical field of gas purification. The method comprises the following steps: a data acquisition stage: acquiring inlet gas flow and outlet component data; in the adsorbent state monitoring stage, the adsorbent state is monitored in real time through the monitoring point position in the adsorption barrel; in the adsorption capacity calculation stage, the residual adsorption capacity is predicted through an impurity penetration curve model on the basis of inlet flow and outlet component data, and bidirectional verification and correction are carried out on the residual adsorption capacity and an internal monitoring state; in the regeneration time prediction stage, the optimal regeneration time is dynamically predicted according to discharged gas component analysis and residual adsorption capacity; in the real-time regulation and control stage, parameters of the purifier and the regenerative heater are adjusted in real time according to the prediction result. Accurate evaluation of the state of the adsorption cylinder and intelligent optimization of the regeneration process are achieved, the utilization rate of the adsorption cylinder is remarkably increased, and the total energy consumption of regeneration is reduced.

The present invention provide novel immunofiber compositions for protein or peptide purification and simple and cost-efficient methods and systems using these compositions. In some embodiments, the immunofibers comprise a customized Z-33 peptide derived from Staphylococcus aureus Protein A which is used to construct immuno-amphiphile molecules that assemble into immunofibers in aqueous solution with bioactive epitopes on the surface and have peptide or protein binding ability.

The invention discloses a heat adsorption type drying machine with a three-tower structure and an adsorption regeneration technology of the heat adsorption type drying machine, and belongs to the technical field of adsorption type drying machines. The dryer comprises three adsorption towers, a regeneration system and a PLC control system, adsorbents are arranged in the adsorption towers, and the regeneration system comprises an electric heater and an air blower which are connected through a steel pipe. According to the dryer, the purpose of saving energy is achieved through the peak-valley-flat electricity price, the adsorption tower A, the adsorption tower B and the adsorption tower C conduct adsorption in the daytime, the regeneration and cold blowing process is conducted when the valley electricity price is utilized, and therefore the operation cost of the dryer is reduced; the adsorption regeneration process comprises two working modes: in the first working mode, adsorption is carried out for 12 hours in a tower A, adsorption is carried out for 12 hours in a tower B, and adsorption is carried out alternately in a tower C; and a second working mode: one tower performs adsorption work, one tower performs heating regeneration, and the other tower can perform cold blowing. The adsorption dryer with the three-tower structure can meet the requirement of a customer for reasonably selecting an off-peak electricity period for heating regeneration, so that the operation electric energy of equipment is greatly reduced.

The invention belongs to the technical field of biological materials, and particularly relates to a preparation method of a KOH activated fungal mycelium biochar / chitosan composite material. According to the preparation method disclosed by the invention, Phanerochaete chrysosporium mycelium is used as a carbon source, and KOH chemical activation and chitosan surface modification are sequentially carried out, so that the charcoal / chitosan composite material CHKBC is prepared. The CHKBC material prepared by the method is large in specific surface area, developed in pore structure, rich in mesopores and excellent in adsorption performance and regeneration performance; the specific surface area is up to 3650-3920m < 2 > / g, the average pore size is 2-4nm, and both the specific surface area and the average pore size are higher than those of precursor biochar and activated biochar; the maximum adsorption capacity of tetracycline TC is 650-690 mg / g, which is far higher than that of KBC and BC. After five times of recycling, the average regeneration efficiency is higher than 90%, and the regeneration performance is good.

The invention relates to the technical field of activated carbon adsorption towers, in particular to a self-cleaning circulating type industrial organic waste gas activated carbon adsorption tower which comprises an adsorption tower body, an adsorption mechanism is arranged on the outer side of the adsorption tower body, and a recycling mechanism is arranged on the front side of the adsorption mechanism. The adsorption mechanism comprises a vibration assembly, a sweeping assembly, a leading-in assembly, a conveying assembly and a flow dividing assembly, the vibration assembly is arranged on the inner side of the adsorption tower body, the sweeping assembly is arranged on the inner side of the vibration assembly, the leading-in assembly is arranged on the inner side of the vibration assembly, and the conveying assembly is arranged on the top of the vibration assembly; the flow dividing assembly is arranged on the front side of the conveying assembly. The invention provides a self-cleaning circulating type industrial organic waste gas activated carbon adsorption tower which is provided with a structure for circularly cleaning and recycling residual impurities, so that the residual impurities on the surface of an activated carbon plate can be cleaned and recycled, and the long-term use stability of the activated carbon plate is improved.

The invention discloses a deep fluorine removal agent and application thereof in wastewater in the photovoltaic industry, and belongs to the technical field of fluorine-containing wastewater treatment.The deep fluorine removal agent is obtained by conducting coordination on cross-linked hybrid chitosan microspheres and lanthanum ions to obtain composite microspheres and then synthesizing zirconium-based MOF on the composite microspheres through a hydrothermal synthesis method. The pore channels of the MOF facilitate the passing of fluorine ions but not the passing of sulfate ions, play a certain barrier role, facilitate the enrichment of the fluorine ions on the surfaces of the composite microspheres and the selective adsorption of the lanthanum ions on the fluorine ions, so that the fluorine ions are fixed, and the combination stability of the fluorine ions and the lanthanum ions is greater than that of the sulfate ions. The sulfate ions are in disadvantage when competitive adsorption with the fluorine ions, the selectivity of the deep fluorine removal agent to the fluorine ions is improved, the magnesium ions can be combined with the fluorine ions to generate complexes and can be combined with the sulfate ions to generate soluble magnesium sulfate, and interference of the sulfate ions is reduced through cooperation of the magnesium ions and the sulfate ions.

The invention discloses an organic waste gas steam desorption, condensation, regeneration and recovery device, and relates to the technical field of organic waste gas regeneration and recovery, the organic waste gas steam desorption, condensation, regeneration and recovery device comprises an adsorption box and a first fan, one side of a rotating plate is provided with an alternating mechanism, and the top end of a condensation cylinder communicates with a self-cleaning mechanism; the alternating mechanism and the self-cleaning mechanism are dual systems, the alternating mechanism adopts a four-turntable modular design, each turntable bears a plurality of condenser pipes, and the condenser pipes can be quickly taken and placed through station alternating driven by a rotating plate in cooperation with rotating positioning of the turntables; the self-cleaning mechanism is provided with an overturning roller, automatic taking and placing of the condensation pipe are completed under the condition that a condensation shell is kept in a sealed state, and after the condensation pipe is transferred to a brushing station through a clamping head, surface attachments are efficiently removed through relative rotation movement of a pipe body and bristles. According to the composite design, the whole-process non-stop operation is realized in a breakthrough manner, the continuous and stable operation of the organic waste gas treatment system is ensured, the overall treatment efficiency is improved, and meanwhile, the maintenance cost is reduced.

The invention relates to the technical field of water treatment filter materials, in particular to an intelligent clean gradient composite water purification filter element and a preparation method thereof. The filter element adopts an integrated design of'natural gradient base material + ZIF-67 function enhancement + fluorescence-ultrasonic intelligent regeneration ': modified vegetable sponge is used as a porous support layer, a silica gel / ZIF-67 composite gradient layer is constructed on the porous support layer to realize adsorption and antibacterial dual functions, and dopamine-aluminum ions are used for composite surface modification to enhance hydrophilicity and interlayer binding force; a matched automatic system senses pollution in real time through the fluorescence monitoring module and triggers the ultrasonic regeneration module to complete self-cleaning, and the flux recovery rate is larger than or equal to 97.5%; the interception rate of the filtering element to anabaena under the operation pressure of 0.1-0.3 MPa is larger than or equal to 99.2%, the filtering flux is increased by 6-8 times compared with that of a commercial element, the filtering element can tolerate complex water quality in the coexistence of drugs and personal care products, natural vegetable sponge serves as a base material, and the filtering element has the advantages of biocompatibility and low cost and is suitable for drinking water purification and eutrophication water body treatment.

The invention relates to the field of gas combustion, and discloses an ultralow-concentration gas heat storage type direct combustion incinerator which comprises a first gas storage tank, an adsorption assembly, a second gas storage tank and a combustor, the adsorption assembly comprises a rack, an upper cover plate and a lower cover plate are arranged on the rack, and the axis of the upper cover plate and the axis of the lower cover plate are vertically arranged; a vertically-arranged rotating body is rotationally installed between the upper cover plate and the lower cover plate, a rotating shaft formed at the rotating installation position is in power connection with a motor, at least three installation holes are formed in the end face of the rotating body in a penetrating mode, the installation holes are formed in the circumferential direction of the rotating body in an array mode, and activated carbon is arranged in each installation hole. The end face of the upper cover plate is provided with a gas inlet, an air outlet and a gas outlet which are communicated with the three mounting holes respectively, when the motor drives the rotating body to rotate, the mounting hole communicated with the gas inlet can be sequentially communicated with the air outlet and the gas outlet, the end face of the lower cover plate is provided with a heat exchange opening, and the heat exchange opening and the gas outlet are coaxial.

The invention discloses an efficient activated carbon adsorption box for waste gas treatment, and relates to the technical field of waste gas treatment.The efficient activated carbon adsorption box comprises a box body and a core changing assembly, a gas inlet pipe is arranged at the lower end of one side of the box body, a filtering frame is slidably connected to the interior of the box body, breathable nets are arranged on the two sides of the filtering frame, and the core changing assembly is connected to the top of the filtering frame; and the core changing assembly comprises a storage hopper. Through dynamic sealing between the conveying rollers and the filter frames, internal activated carbon is continuously replaced, meanwhile, waste gas is subjected to countercurrent purification through the three layers of filter frames along an S-shaped path under the guidance of the partition plates, waste gas with low pollution is treated through fresh activated carbon particles, and high-pollution airflow is adsorbed through a saturated activated carbon layer; according to the design, the adsorption efficiency of activated carbon is utilized to the maximum extent, so that the waste gas treatment effect is improved, the double-shaft motor drives the conveying rollers to realize automatic replacement of internal activated carbon particles in the equipment in the use process, shutdown maintenance is not needed, and the waste gas treatment continuity is remarkably improved.

The present disclosure provides a process for the separation and purification of radium and actinium from acidic solution using composite adsorbents. The process includes preparing polyoxometalates (POMs)-based mesoporous composite metal-infused resins using phosphate recovered from waste buffer solution. The resins are prepared using a modified sol-gel technique to form inorganic composite metal-oxide clusters. Embodiments of the resins include silica-coated composite metal oxide particles, including antimony-vanadium oxide particles, and tungsten-doped mesoporous titanium oxide particles. The resins have differing adsorption affinities for actinium, radium, and other metal ions and may thus be utilized for selectively separating radium and actinium from irradiated thorium targets.

The invention discloses a real-time monitoring data control method for adsorption separation and an adsorption separation device, and relates to the technical field of adsorption and analysis regulation and control. The method comprises the following steps: setting a first cleanliness threshold value of finished gas and a second cleanliness threshold value of desorption gas; according to the current state of the first cleanliness and the current state of the second cleanliness, the regeneration medium flow of the analysis process is dynamically adjusted; or when the first cleanliness reaches the first cleanliness threshold value and the second cleanliness reaches the second cleanliness threshold value, the current adsorption process is ended, and the working mode is switched; if the second cleanliness does not reach the threshold value, the regeneration medium flow is increased until the switching condition is met. Saturation regulation is carried out by monitoring the dual states of the finished gas and the desorption gas in real time, actual working condition fluctuation can be responded in a self-adaptive mode, the quality stability of the finished gas is guaranteed, meanwhile, the problem that regeneration is insufficient or regeneration media are excessively consumed is solved, and operation energy consumption is remarkably reduced.

The invention discloses a preparation method of ulinastatin adsorption resin, and belongs to the technical field of adsorption resin. Comprising the following steps: (1) preparing a water phase: adding pure water, gelatin, cellulose, sodium chloride and lignin into a reaction kettle until the materials are fully dissolved; (2) preparing an oil phase, wherein the oil phase contains divinylbenzene, methyl acrylate, benzoyl peroxide, tert-butyl peroxy-2-ethylhexanoate, triallyl isocyanurate, tripropanol alkyl trimethacrylate and methylbenzene, and the oil phase is uniformly stirred and mixed with the methylbenzene and the trivinylbenzene, the methyl acrylate, the benzoyl peroxide, the tert-butyl peroxy-2-ethylhexanoate, the triallyl isocyanurate, the tripropanol alkyl trimethacrylate and the methylbenzene; (3) suspension polymerization: putting the oil phase into the water phase, and carrying out staged heating reaction; (4) amination reaction; (5) alkylation reaction; and (6) acid-base alcohol treatment. Compared with the existing resin, the resin disclosed by the invention has the characteristics of high adsorption exchange rate, high desorption rate and high desorption concentration on ulinastatin, and the yield of ulinastatin is increased by 1.17 times compared with that of D215 resin.

The invention provides an adsorption process for recovering ethylene from refinery dry gas through combination of MOF and zeolite, raw material gas is refinery dry gas, a main body contains hydrogen, carbon dioxide, C1-C3 low-carbon hydrocarbon gas and the like, the content of C2H4 is about 10%, a pre-decarburization process and an associated bed process are introduced, the adsorption capacity of an adsorbent is protected, and the content of ethylene is reduced. The non-compliant purity ethylene gas in the pressure swing adsorption process is re-enriched and recovered through an associated bed; in the initial stage of adsorption separation, after CO2 is removed through a customized or commercialized adsorbent, C2H4 enrichment and purification are directly carried out, and by introducing an associated bed, ethylene in gas passing through the adsorption process and ethylene gas in the preliminary desorption process of the adsorption bed are captured again, so that the ethylene recovery rate in the process is improved.

A carbon capture and storage (CCS) material may be synthesized using a wide variety of feedstock from agricultural, forestry, and sanitary wastes. The feedstock is heated under a reaction medium. After adding a solution of an activating alkali metal compound to the feedstock, the feedstock and activating alkali metal compound are heated under flowing gases to form the CCS material. This CCS material may be used and regenerated multiple times, then used as a soil amendment.

The invention discloses a calcium-based CO2 adsorbent as well as a preparation method and application thereof. The calcium-based CO2 adsorbent comprises a CaAl12O19-CaSiO3 reticular skeleton structure, and the CaAl12O19-CaSiO3 reticular skeleton structure is enclosed to form a pore cavity; and a plurality of CaO particles dispersed within the pore cavity. The possibility that the calcium-based CO2 adsorbent is caked in high-temperature CO2 capture circulation can be effectively reduced, and the adsorption performance and the circulation stability of the calcium-based CO2 adsorbent are better improved.