370 results about "Low carbon dioxide" patented technology

The invention discloses a method for realizing carbon dioxide emission reduction in a catalyst regeneration process, regenerated flue gas is subjected to dust removal and pressure reduction to obtain low-pressure flue gas, the low-pressure flue gas is divided into a first flue gas material flow and a second flue gas material flow, the first flue gas material flow is subjected to heat exchange, denitration and desulfurization dust removal treatment to obtain desulfurized flue gas, and the desulfurized flue gas is subjected to heat exchange, denitration and desulfurization dust removal treatment to obtain a second flue gas material flow; water vapor in the desulfurized flue gas is removed to obtain low-humidity flue gas, part of the low-humidity flue gas serves as circulating flue gas to participate in catalyst regeneration, part of the low-humidity flue gas and hydrogen are subjected to a combustion reaction, deoxidized flue gas is obtained, and high-concentration carbon dioxide is obtained after the deoxidized flue gas is dehydrated; the second flue gas material flow is subjected to heat exchange with the circulating flue gas or is returned together with the circulating flue gas to participate in catalyst regeneration or is mixed with the first flue gas material flow in the denitration process, and heat exchange, desulfurization and dust removal are continued to obtain desulfurized flue gas. The method solves the problems of large total carbon dioxide emission, low carbon dioxide concentration and high trapping cost of a hydrocarbon processing device in the prior art.

The invention discloses a multi-amino absorbent for carbon dioxide capture and a method for capturing carbon dioxide from a gas mixture, and belongs to the technical field of gas separation and carbon capture, utilization and storage. The multi-amino absorbent at least comprises a first component and a second component, wherein the first component is at least one N-hydroxyalkyl-N '-hydroxyalkyl-alkane diamine; the second component is at least one organic amine different from the first component, and the organic amine contains amino groups which are not primary amino groups and does not contain steric hindrance amino groups; and a solvent and optionally an additive. The method for capturing carbon dioxide from a gas mixture includes contacting the polyamino absorbent with a gas mixture containing carbon dioxide, thereby capturing carbon dioxide. The polyamino absorbent disclosed by the invention has the advantages of low carbon dioxide absorption reaction heat in normal-pressure flue gas, high circulating absorption amount, high absorption rate, high desorption rate, low volatility and the like.

Provided is a carbon dioxide capture system using heat pumps for waste heat recovery and utilization. In the system, waste heat recovery and upgrading are performed, by means of a first waste heat recovery heat pump, on a lean solution in a medium-temperature section that has been cooled by means of a lean-rich solution heat exchanger, and / or waste heat recovery and upgrading are performed, by means of a third waste heat recovery heat pump, on reaction waste heat of an absorption solution; and recovered waste heat is used for heating a medium-lean solution at the bottom of a desorption tower to perform carbon dioxide desorption, thereby realizing the recovery and full upgrading of low-grade waste heat, and thus achieving the aim of full utilization of low-grade waste heat. By means of a first coupled heat exchanger and / or a second coupled heat exchanger, the system further makes the working medium, which is obtained after recovered heat energy is reused for carbon dioxide desorption, further exchange heat with a split cold rich solution to preheat the cold rich solution, thereby realizing coupled utilization of energy inside the carbon dioxide capture system, and thus effectively reducing the heat consumption and operating costs of the carbon dioxide capture system.

A process for producing a hydrogen product where a carbon-containing input, by reforming and water gas shift, is converted into a synthesis gas largely consisting of hydrogen and carbon dioxide, from which a hydrogen fraction and a carbon dioxide fraction are separated, wherein the hydrogen fraction has the composition required for the hydrogen product and the carbon dioxide fraction has a purity which allows delivery thereof as a product or disposal thereof through sequestration. The characterizing feature here is that the synthesis gas consisting largely of hydrogen and carbon dioxide, by means of a first pressure swing adsorber, is fractionated into a carbon dioxide-depleted first PSA high-pressure fraction and a carbon dioxide-enriched first PSA low-pressure fraction, from which, after compression, the carbon dioxide fraction is obtained by cryogenic gas fractionation.

The invention discloses application of a mineralized carbon sequestration strain, the mineralized carbon sequestration strain is classified and named as Halomonas sulfidaeresis. ZN2 #, the mineralized carbon sequestration strain is preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation number is CGMCC No.32033. The invention further discloses a preparation method of the mineralized carbon sequestration strain. The mineralization carbon sequestration strain can metabolize to generate urease and carbonic anhydrase at the same time, the two enzymes are subjected to a dual mineralization reaction in combination with a microorganism-induced calcium carbonate precipitation technology, the crystal form of a mineralization product is improved, the mineralization strength is improved, meanwhile, carbonic anhydrase can absorb carbon dioxide in the environment, high-strength soil reinforcement is achieved, meanwhile, carbon dioxide emission is reduced, and the soil quality is improved. Therefore, the dual effects of biomineralization remediation and improvement and carbon sequestration and emission reduction of the soil are achieved, and sustainable development of a soil bioremediation and improvement technology is achieved.

The invention discloses a method for preparing aromatic hydrocarbon by catalyzing carbon dioxide hydrogenation, which is characterized in that a fixed bed reactor is filled with a bifunctional catalyst, and the bifunctional catalyst is prepared by mechanically mixing an iron-based metal oxide CuFeO2 catalyst and orderly stacked multiple layers of HZSM-5 nanosheets, wherein a structure-directing agent hexadecyl trimethyl ammonium bromide is added to guide synthesis during hydrothermal synthesis of the orderly stacked multi-layer HZSM-5 nanosheets; before reaction, the CuFeO2 catalyst is reduced by hydrogen, and then carbon dioxide, hydrogen and nitrogen are introduced for reaction. According to the invention, the CuFeO2 catalyst is coupled with the multilayer HZSM-5 nanosheet to catalyze CO2 to prepare the aromatic hydrocarbon, the aromatic hydrocarbon with high space time yield can be obtained under the condition of high CO2 conversion rate, and the used catalyst is simple in preparation method, low in price, green and pollution-free, and is suitable for industrial production. The problems of low carbon dioxide conversion rate, high selectivity of by-products (carbon monoxide and methane) and low yield of aromatic hydrocarbon products in the reaction of preparing aromatic hydrocarbon by carbon dioxide hydrogenation of the existing catalyst are solved.

The invention relates to the technical field of oil exploitation, in particular to a carbon dioxide drive shaft cold damage prevention device and a using method. According to the technical scheme, an oil pipe and a small-diameter oil pipe are connected with an anti-blocking jet flow drainage and production pump, the anti-blocking jet flow drainage and production pump is installed in the middle of an oil well, the lower end of the anti-blocking jet flow drainage and production pump is connected with an underground gas-liquid separator through the oil pipe, and the lower portion of the underground gas-liquid separator is connected with a fin type heat exchanger. The lower portion of the fin type heat exchanger is connected with a depressurization and degassing heat exchanger, and the depressurization and degassing heat exchanger is located below the oil layer. The device has the advantages that the cooling problem in an oil extraction production shaft caused by heat absorption in the carbon dioxide gasification process can be solved, the situation that a liquid flow channel is blocked due to wax precipitation and freezing of crude oil caused by cooling is avoided, and the corrosion problem of carbon dioxide to a pipe column can be greatly solved due to doping of power liquid; in addition, the anti-well-flushing wax dissolving and plug removal can be achieved, re-operation is avoided, and the operation cost is reduced.

The invention relates to the technical field of solid waste resource utilization, in particular to a large-volume solid waste sludge curing agent which comprises the following raw materials: granulated blast furnace slag, steel slag, sulfate, lithium slag, carbonized steel slag powder and P.O 425 cement. During preparation, the raw materials are uniformly mixed and put into a planetary ball mill to be mixed and ground, and then are uniformly mixed with water according to the mass ratio of 1: 1 to obtain the sludge curing agent with the large solid waste mixing amount. According to the invention, the sludge curing agent with large solid waste content is prepared from industrial solid wastes such as steel slag, mineral slag, lithium slag and sulfate and less or even no cement, and is used for curing sludge, so that the dependence on traditional high-carbon emission materials is greatly reduced, and the curing effect is enhanced. Compared with the prior art, a high-temperature calcination process is not adopted in the curing agent preparation process, the emission of carbon dioxide can be effectively reduced, and the current low-carbon and environment-friendly trend is met.

The invention discloses an electricity, gas and suspension three-composite lithium ore roasting kiln system and process. The alpha-type spodumene is converted into the beta-type spodumene through constant-speed drying and preheating of a suspension preheating device, primary roasting of an electric heating kiln and secondary roasting of a gas kiln. Compared with traditional transformation roasting of spodumene in a rotary kiln with natural gas as fuel, the method has the advantages that the temperature of spodumene is increased to 600-800 DEG C through preheating of the suspension preheating device and one-time roasting of the electric heating kiln, only the rear-section temperature rising work needs to be completed in the gas kiln, a large amount of natural gas resources can be saved, meanwhile, emission of carbon dioxide is reduced, and the production cost is reduced. The device accords with the national carbon neutralization policy, and is very suitable for being used in areas which are lack of natural gas, rich in electric power reserve or low in electricity price and high in environmental protection requirement.

The invention belongs to the field of biomass gasification catalysts, and particularly relates to a preparation method of an energy-saving corrosion inhibition type decarburizing agent. According to the invention, under the action of the catalyst, ethylene carbonate and methylamine are adopted as basic raw materials to synthesize N-methyldiethanolamine, and then 1, 3-propane sultone is adopted to modify N-methyldiethanolamine, so that the carbon dioxide absorption amount and absorption rate of N-methyldiethanolamine are improved; the activating agent is added into the energy-saving corrosion-inhibition type decarburizing agent, so that the absorption rate of the decarburizing agent on carbon dioxide can be effectively improved, and the desorption energy consumption of the carbon dioxide is reduced; and the corrosion inhibitor is added, so that the corrosion of metal equipment can be effectively reduced.

The invention discloses a hydrated calcium silicate nano material as well as a preparation method and application thereof. The hydrated calcium silicate nanostructure material comprises hydrated calcium silicate (C-S-H) and cetyltrimethylammonium bromide (CTAB), the mass percent of the CTAB in a total solvent system is greater than 0 and less than or equal to 0.025 g / mL, and the mole percent of the CSH in the total solvent system is 0.8-1.2 mol / L. According to the hydrated calcium silicate nano material, low-cost direct carbon capture is realized, capture can be quickly carried out in an environment with relatively low carbon dioxide concentration, and the hydrated calcium silicate nano material is simple to prepare and stable in performance.

The present invention relates to a method and an apparatus for converting carbon monoxide and / or carbon dioxide and hydrogen in a gas to methane and water. The gas containing carbon monoxide and / or carbon dioxide is preferably biogas, flue gas or synthesis gas. The gas containing hydrogen is preferably a gas obtained from the electrolysis of water. The method and apparatus include efficient washing of the packaging material without removing it from the reactor, thereby maintaining and optimizing the conversion efficiency. In particular, the present invention relates to increasing the amount of green energy obtained from the anaerobic digestion of organic material by reducing the carbon dioxide content and increasing the methane content in the gas.

The utility model provides a waste heat utilization module for a carbon dioxide capture system and the carbon dioxide capture system for waste heat recovery and utilization, wherein the carbon dioxide capture system comprises the waste heat utilization module. The waste heat utilization module utilizes a working medium steam compression device to compress and heat working medium steam carrying waste heat recovered from a carbon dioxide capture system into compressed working medium steam so as to improve the quality of the recovered waste heat, and then the compressed working medium steam is reused for medium barren liquor at the bottom of a desorption tower through a waste heat utilization device for carbon dioxide desorption. And the quality of the recycled waste heat is improved through compression, and efficient utilization of the waste heat is achieved. The carbon dioxide trapping system adopts the waste heat recovery heat exchanger to replace a traditional cooler, and realizes recovery, quality improvement and effective utilization of low-grade heat energy by utilizing a circulating working medium, so that sufficient recovery and utilization of internal energy of the carbon dioxide trapping system are realized; and the heat consumption and the operation cost of the carbon dioxide capture system are effectively reduced.

To provide a hydraulic composition having flowability, fluidity retention property, and strength development property, and capable of reducing a carbon dioxide balance.SOLUTION: A hydraulic composition containing water, at least one aggregate selected from a fine aggregate and a coarse aggregate, a powder containing a binding material, and a chemical admixture is such that: at least one condition selected from the conditions that the powder contains CO2 fixing fine powder, the fine aggregate contains CO2 fixing modified and recycled fine aggregate, and the coarse aggregate contains CO2 fixing modified and recycled coarse aggregate is satisfied; a mass ratio (water / binding material) of water to the binding material contained in the powder is 0.3-0.9; and a content of the chemical admixture is 0.02-1.0 pt.mass based on 100 pts.mass of the binding material.SELECTED DRAWING: None

The invention discloses a system and a method for preparing low-carbon olefin through carbon dioxide adsorption and in-situ oxidative dehydrogenation. The invention provides a system and a method for integrating carbon dioxide capture and in-situ oxidation low-carbon alkane (ethane / propane) dehydrogenation, a bifunctional material is composed of an adsorbent and a catalyst, and capture of carbon dioxide and in-situ oxidation low-carbon alkane dehydrogenation can be realized in the same reaction tower, so that the highest one-way carbon dioxide conversion rate can reach 100%, and the conversion rate of carbon dioxide can reach 100%. And meanwhile, the ethylene yield reaches 26%. According to the method, the problems of additional product separation and product gas recycling caused by low carbon dioxide conversion efficiency in the prior art are avoided, and effective heat management is realized, so that the process of integrating carbon dioxide capture and preparing low-carbon olefin by oxidizing low-carbon alkane has more economic advantages.

The utility model provides a heat pump type waste heat recycling module for a carbon dioxide capturing system and the carbon dioxide capturing system comprising the heat pump type waste heat recycling module. According to the heat pump type waste heat recycling module, waste heat of regenerated gas and compressed regenerated gas is recycled through the waste heat recycling heat pump, and the recycled waste heat is directly or indirectly reused for carbon dioxide desorption through the waste heat utilization device, so that efficient utilization of the waste heat of the regenerated gas and the compressed regenerated gas is achieved; therefore, the heat energy consumption of the carbon dioxide capture system is reduced.

The invention discloses a sparkling water machine with a low-pressure maintaining function. The sparkling water machine comprises a main machine, a gas bottle, a water bottle, a first mounting seat, a first valve cavity, a first gas guide channel, a first valve body, a pressure feedback shutdown structure, an active exhaust valve body, an exhaust hole and a first reset spring. After bubble water is prepared, carbon dioxide gas in the water bottle can be directly and completely exhausted through the active exhaust valve body, and therefore the water bottle can be directly taken out. If a user does not need to drink directly after preparation is completed, active exhaust can be avoided through the active exhaust valve body, high-pressure carbon dioxide enters the first valve cavity through the first air guide channel and then is exhausted along the exhaust hole, and the amount of the exhausted carbon dioxide is controlled through the first valve body; and finally, the water bottle enters a low-pressure state with relatively low carbon dioxide gas concentration, and carbon dioxide in the bubble water is not easy to separate out due to the fact that certain carbon dioxide pressure is still kept in the water bottle, so that the concentration of the bubble water can be ensured, and residual pressure can be discharged when drinking is needed.

The invention provides a coal-based solid waste acid-activated cementing material and a preparation method thereof, and the preparation method comprises the following steps: fully crushing, calcining and ball-milling coal gangue, coal series kaolin and kaolin tailing slag to obtain a ball-milled material; grinding and sieving the sludge incineration ash to obtain screen underflow, and adding an extracting solution into the screen underflow to prepare an acid activator; mixing and stirring an acid activator and the ball-milled material to obtain neat paste; and carrying out pouring molding on the neat paste, and carrying out sealing maintenance to obtain the coal-based solid waste acid-activated gel material. The coal-based solid waste acid-activated cementing material prepared by the preparation method provided by the invention has good cementing property and mechanical property, and the preparation process is low in energy consumption, less in carbon dioxide emission, easily available in raw materials and low in price, so that the resource utilization of solid wastes is effectively realized; an engineering application foundation is laid for replacing cement on a large scale or preparing concrete for buildings, and the method can also be applied to soil remediation of contaminated sites.

The present invention provides a low shrinkage hybrid steel fiber recycled aggregate ultra-high performance concrete and a preparation method thereof, and belongs to the technical field of concrete. The low shrinkage hybrid steel fiber recycled aggregate ultra-high performance concrete of the present invention has high strength, good toughness, low shrinkage, and at the same time has the advantages of low cost and green environmental protection. By replacing part of the cement as a cementitious material with a large amount of fly ash, not only can its volcanic ash activity and particle filling effect be fully exerted, but also carbon dioxide emissions can be reduced. The present invention uses aeolian sand and recycled fine aggregate to replace traditional quartz sand through grading optimization, and then reduces the shrinkage of ultra-high performance concrete by adding recycled coarse aggregate and utilizing the volume stabilization effect of recycled aggregate. Finally, long steel fibers are added to cooperate with fine steel fibers to improve the flexural toughness of ultra-high performance concrete.

The invention provides low-shrinkage mixed steel fiber recycled aggregate ultra-high performance concrete and a preparation method thereof, and belongs to the technical field of concrete. The low-shrinkage mixed steel fiber recycled aggregate ultra-high performance concrete has the advantages of being high in strength, good in toughness, low in shrinkage rate, low in cost and environmentally friendly at the same time, large-dosage fly ash is used for replacing part of cement to serve as a cementing material, the volcanic ash activity effect and the particle filling effect of the high-shrinkage mixed steel fiber recycled aggregate ultra-high performance concrete can be fully exerted, and the service life of the low-shrinkage mixed steel fiber recycled aggregate ultra-high performance concrete is prolonged. And the emission of carbon dioxide can be reduced. The aeolian sand and the recycled fine aggregate are used for replacing traditional quartz sand through grading optimization, then the shrinkage of the ultra-high performance concrete is reduced by doping the recycled coarse aggregate and utilizing the volume stabilization effect of the recycled coarse aggregate, and finally the bending toughness of the ultra-high performance concrete is improved by adding the long steel fibers to cooperate with the fine steel fibers.

The invention provides a supercritical carbon dioxide pipeline and storage well linkage flow control method and device, and relates to the field of carbon dioxide geological storage, the method comprises the following steps: determining the pressure deviation between the reservoir pressure and the configured target pressure based on the obtained pipeline data, bottom hole pressure data and reservoir pressure data; based on the pressure deviation, the first opening degree of an injection control valve of supercritical carbon dioxide and the second opening degree of an injection control valve of a corresponding water injection opening in the water injection pipeline are determined. The pressure deviation can be accurately calculated by acquiring the pressure data of the pipeline, the well bottom and the reservoir and comprehensively considering the influence of the pipeline parameters on the pressure. Based on the deviation, the opening degrees of the carbon dioxide and water injection control valves are determined through scientific methods such as proportional control and flow and opening degree curves, and cooperative control over the carbon dioxide and the water injection control valves is achieved. According to the method, the problem that the reservoir pressure is too high or too low due to improper injection flow can be effectively avoided, the carbon dioxide leakage risk is reduced, and the sealing efficiency is improved.

The invention relates to the technical field of carbon dioxide capture, and discloses a carbon dioxide capture system and a method for reducing energy consumption in the carbon dioxide capture process. The system comprises an absorption tower, a rich and lean liquid heat exchanger, a regeneration tower, a waste heat recovery refrigeration device, a regeneration gas cooler, a regeneration gas separator and a compressor which are sequentially arranged in the circulation direction of raw material flue gas containing CO2, wherein the absorption tower is used for enabling raw material flue gas containing CO2 to be in contact with an absorbent to obtain a rich solution; the lean and rich solution heat exchanger is used for carrying out heat exchange on the rich solution and a lean solution obtained at the bottom of a regeneration tower; and the waste heat recovery refrigerating device is used for carrying out waste heat recovery on regenerated gas at the top of the regeneration tower and uncondensed gas at the outlet of the compressor. According to the system, the waste heat recovery refrigerating device is adopted, so that power consumption and absorbent loss of the carbon dioxide system are reduced.

The utility model provides a carbon dioxide trapping system for recycling waste heat by a heat pump. According to the system, waste heat recovery and quality improvement are carried out on barren liquor which is cooled by a barren-rich liquor heat exchanger and located in a medium-temperature section through a first waste heat recovery heat pump, and / or waste heat recovery and quality improvement are carried out on reaction waste heat of absorption liquid through a third waste heat recovery heat pump; and the recovered waste heat is used for heating a medium barren solution at the bottom of the desorption tower to perform carbon dioxide desorption, so that the recovery and full quality improvement of the low-grade waste heat are realized, and the aim of fully utilizing the low-grade waste heat is fulfilled. According to the system, through the first coupling heat exchanger and / or the second coupling heat exchanger, the working medium obtained after the recycled heat energy is reused for carbon dioxide desorption further exchanges heat with the shunted cold pregnant solution so as to preheat the cold pregnant solution, and therefore coupling utilization of the internal energy of the carbon dioxide capturing system is achieved. And the heat consumption and the operation cost of the carbon dioxide capture system are effectively reduced.

A heater includes a radiant section with a bottom wall and a side wall. A burner is provided on the bottom wall and a primary fuel stream and a primary combustion air stream are provided through the burner to support a primary combustion reaction local to the burner. The primary combustion air stream may be less than the air needed to burn all of the primary fuel stream, resulting in the primary combustion reaction being sub-stochiometric and reducing NOx formation. A remote air pipe injects remote air into the radiant section distal to the burner, and in some cases, spaced from the burner by at least two meters. The remote air addition supports a lean secondary combustion reaction that further minimizes NOx emissions concentration. The heater is suitable for use with high H2 fuel or preheated air, or both, to lower CO2 emissions while meeting NOx emission targets.

The invention discloses a production process of tire cord steel with low carbon dioxide emission, which relates to the technical field of steel production and sequentially comprises electric furnace smelting, refining, continuous casting, blank grinding and rolling. Wherein a raw material for electric furnace smelting is scrap steel. According to the method, 100% of scrap steel is adopted as ingredients, molten iron is not adopted, physical hot melting is completely achieved through electric arc energization of an electric furnace, and due to the fact that molten iron does not exist, CO2 emission is small or basically no emission exists, CO2 emission per ton of tire cord steel is smaller than or equal to 1.0 ton and is far lower than the CO2 emission level of a converter.

To provide a sound absorbing wall structure equipped with a sound absorbing material with low carbon dioxide emissions during manufacturing, etc. and high sound absorption coefficient.SOLUTION: In a sound-absorbing wall structure in which a sound absorbing panel containing a sound absorbing material in a frame is fixed to a wall surface erected along a railroad track or to a post having a pair of flanges facing each other, the sound-absorbing material comprises a wadding material and a skin material encasing the wadding material, the wadding material being a nonwoven fabric containing two or more kinds of thermoplastic resin fibers, in which diameters of the thermoplastic resin fibers differ to each other and the total surface area of an outer diameter of the wadding fibers per unit area of the wadding is 150 to 270 m2 / m2, and the skin material is a nonwoven fabric containing polypropylene resin fibers.SELECTED DRAWING: None

Provided are a method for controlling the amount of scale formation of a metal material, an apparatus for controlling the amount of scale formation, and a method for operating a heating furnace, for controlling the amount of scale formation within an appropriate range when it is desired to reduce the amount of carbon dioxide emission by using hydrogen and ammonia as fuel gas for a heating furnace for heating a metal material. A method for controlling the scale generation amount of a metallic material in a heating furnace, in which a hydrogen-based gas having hydrogen and / or ammonia as the total amount is used as a fuel, the metallic material is heated by a burner, and the flow rate of the hydrogen-based gas used for the fuel heated by the burner is set as an operating parameter of the heating furnace. The amount of scale generated on the surface of the metal material is controlled on the basis of the set flow rate of the hydrogen-based gas. Furthermore, it is preferable that at least one of the heating time and the heating temperature of the metal material in the heating furnace be further set as the operating parameters of the heating furnace.

The invention provides a reverse mixed carbon dioxide pre-fracturing pump injection design method, which belongs to the technical field of horizontal well fracturing, and comprises the following steps: acquiring basic parameters of a target oil reservoir, and determining reservoir transformation requirements; according to the target oil reservoir transformation requirement, a reservoir transformation design scheme is determined through numerical simulation, and fracturing transformation parameters of the target area body are determined; according to the target oil reservoir transformation requirement, the reverse mixing pump injection technology is optimized; carbon dioxide pre-construction parameters are optimized according to indoor experiments and numerical simulation; and constructing a reverse mixed carbon dioxide pre-fracturing pump injection program by utilizing the fracturing transformation parameters, the reverse mixed pump injection process and the carbon dioxide pre-construction parameters. According to the method, the carbon dioxide pre-fracturing construction difficulty is reduced, and the carbon dioxide pre-fracturing yield increasing effect is improved.

The invention discloses a device and method for evaluating the sealing performance of a shaft under the geological storage in-situ condition of carbon dioxide, and the device comprises a corrosion shaft test module, a carbon dioxide displacement module, a gas channeling simulation module, a shaft temperature and pressure control module and a stratum temperature and pressure control module. The shaft assembly is arranged in the testing shell in a penetrating mode, closed cavities are formed between the top end of the shaft assembly and the top end of the testing shell and between the bottom end of the shaft assembly and the bottom end of the testing shell, and a gas flow meter is installed at the top end of the testing shell. And a confining pressure bin and a heating bin are sequentially arranged in the test shell in the radial direction away from the shaft assembly. The device can simulate the lithology-temperature-pressure-carbonic acid environment in the geological storage process of carbon dioxide, and the sealing capacity of a shaft under the in-situ service condition is evaluated; therefore, the purposes of optimizing the formula of the cement paste, optimizing the material of the sleeve and reducing the risk of carbon dioxide leakage are achieved.

The invention discloses application of a carbon dioxide adsorption catalytic material in capturing carbon dioxide in air and catalytically converting the carbon dioxide into synthesis gas, relates to a preparation method and application of a material for directly capturing and preparing green synthesis gas in situ, and belongs to the field of carbon dioxide adsorption catalytic bifunctional materials. The preparation method of the material comprises the following steps: manufacturing a large number of point defects on silver-loaded graphene aerogel through thermal reduction and plasma treatment, grafting an ionic liquid, synthesizing a novel bifunctional catalyst, and carrying out direct air trapping and catalysis in an adsorption column, so as to obtain the silver-loaded graphene aerogel. The synthesized novel catalyst can be used for capturing at low carbon dioxide concentration, and then catalyzing carbon dioxide into synthesis gas through electro-catalysis, so that a product with a high additional value is obtained.