848 results about "Co2 adsorption" patented technology

A method is provided for removing water, carbon monoxide and carbon dioxide out of a gas, such as air, by passing the gas through a packed column so that the gas sequentially contacts a catalyst consisting of platinum or palladium and at least one member selected from the group consisting of iron, cobalt, nickel, manganese, copper, chromium, tin, lead and cerium wherein the catalyst is supported on alumina containing substantially no pores having pore diameters of 110 Angstroms or less under conditions which oxidize the carbon monoxide in the gas into carbon dioxide; an adsorbent selected from the group consisting of silica gel, activated alumina, zeolite and combinations thereof under conditions in which water is adsorbed and removed from the gas and an adsorbent selected from the group consisting of calcium ion exchanged A zeolite; calcium ion exchanged X zeolite; sodium ion exchanged X zeolite and mixtures thereof under conditions which carbon dioxide is adsorbed and removed from the gas. The gas may also be subjected to a catalyst / adsorbent in the packed column to effect oxidation and removal of hydrogen in the gas.

Hydrogen sulfide is removed from a hydrogen rich gas stream using adsorbents having a low loss of carbon dioxide adsorption capacity upon sulfur loading including high purity silica gels, titania or highly cross-linked, non-chemically reactive resins. The adsorbents may be used to adsorb both carbon dioxide and hydrogen sulfide, or may be used as a guard bed upstream of a separate carbon dioxide adsorbent.

The invention discloses an MOFs (metal-organic frameworks) based carbon dioxide adsorbent, which includes MOFs and organic amine loaded in the pore channels and on the surface of MOFs. The mass ratio of the MOFs to the organic amine is 0.1-10:1. The MOFs based carbon dioxide adsorbent provided by the invention realizes the combined action of physical adsorption and chemical adsorption and can adsorb and store carbon dioxide at medium and low temperature, and regeneration and reutilization of the adsorbent can be realized under certain condition. The MOFs based carbon dioxide adsorbent has good adsorption capacity, high selectivity and cycling stability on carbon dioxide, and can overcome the disadvantages of easy volatilization and easy corrosion of equipment in organic amine so as to meet the industrial processing requirements. The invention also discloses a preparation method of the MOFs based carbon dioxide adsorbent and application of the adsorbent in adsorption of carbon dioxide in flue gas.

The invention provides an air conditioning device which can maintain indoor air environment and save energy with good effect even when the air-exchange amount is small. The air conditioning device is used for discharging carbon dioxide from the indoor. The air conditioning device is set in that the return air from a room (6) is cooled through an evaporator (10) of a heat pump cycle system; the cooled air passes through the adsorption zone (3) of a honeycomb type rotor (1) having the function of carbon dioxide absorption; outer air (OA) whose temperature increases by passing through a condenser (14) of the heat pump cycle system passes through a desorption zone (4) of the honeycomb type rotor (1). In this case, carbon dioxide contained in the air in the room (6) can be adsorbed to the honeycomb type rotor (1) and be discharged to the outside, thereby the internal environment of the room (6) can be maintained even the air exchange is in small amount.

A series of MOF-based hierarchical porous material, namely IPD-mesoMOF-1˜9, based on nanoscale MOFs of MIL-100(Al, Fe, Cr, Sc and In), MIL-53(Al), HKUST-1, DUT-5, DUT-4, MIL-101(Cr), MIL-101NDC(Cr), MIL-101BPDC(Cr) and MIL-110 respectively, forming the permanent interparticle porosities by using close (or relatively close) packing, and preparation methods thereof. Modulated or functionalized IPD-mesoMOFs can be applied for gas adsorption and molecule separation (such as CH4- and CO2-adsorption, gasoline / diesel desulfurization and purification), catalyst loadings and molecular recognition / immobilization of biological macromolecules and enzymes.

A carbonaceous electrode having improved capacities for doping and dedoping of a cell active substance, such as lithium, and suitable for a non-aqueous solvent secondary battery, is constituted by a carbonaceous material having a true density as measured by a butanol substitution method of at most 1.46 g / cm3, a true density as measured by a helium substitution method of at least 1.7 g / cm3, a hydrogen-to-carbon atomic ratio H / C of at most 0.15 as measured according to elementary analysis, a BET specific surface area of at most 50 m2 / g as measured by nitrogen adsorption BET method, and a carbon dioxide adsorption capacity of at least 10 ml / g. The carbonaceous material is advantageously produced by carbonizing an organic material originated from bamboo genera of family Gramineae, particularly genus Pleioblastus or Bambusa, at 1000-1400° C. under a reduced pressure or under a flowing inert gas stream to provide an appropriate porous structure.

A method of processing carbon dioxide adsorbent for use in a CO2 removal system. The method includes combining a polymer, lithium hydroxide (LiOH), and lubricant that dissolves the polymer to form a first LiOH adsorbent. A structure may be formed using the first LiOH adsorbent. The lubricant may be extracted from the structured LiOH adsorbent using a solvent to form a second LiOH adsorbent. The solvent may be removed from the second LiOH adsorbent to form a third LiOH adsorbent. The third LiOH adsorbent may be hydrated to form a fourth LiOH adsorbent having a water content above an anhydrous level.

The invention relates to a preparation method of metal organic skeleton compound and oxidized graphene composite microspheres having uniform appearance. The method comprises mixing a metal organic skeleton compound dispersion liquid with an oxidized graphene dispersion liquid, and performing spray drying to prepare composite microspheres. According to the spray drying method, the obtained microspheres are uniform in size and high in yield, and have the yield in a range of 70-85% and the average size at about 1.5 mum. To avoid agglomeration of oxidized graphene at a high temperature, ZIF-8 can be converted to nanometer porous carbon at a high temperature, and N-doped nanometer porous carbon and graphene composite microspheres having high specific surface area and nitrogen content. Through high-temperature carbonization treatment, the composite microspheres are improved in conductivity, and can be applied to aspects of CO2 adsorption, super capacitors, batteries, catalysis and separation.

A CO2 removal system including a member having a first opening and a second opening to enable air flow containing carbon dioxide (CO2) to pass from the first opening to the second opening and lithium hydroxide (LiOH) supported by the member and having an initial water content above an anhydrous level. In one embodiment, LiOH adsorbent density is a maximum of approximately 1.0 g / cm3.

A contacting step, in which a mixture gas, including a fuel and steam, is contacted with a reactor bed, including a reforming catalyst and a carbon dioxide adsorbent, thereby converting the mixture gas into hydrogen and adsorbing co-generating carbon dioxide onto the carbon dioxide adsorbent, and a heating step, in which the reactor bed is heated, thereby desorbing the adsorbed carbon dioxide from the carbon dioxide adsorbent and regenerating a carbon dioxide adsorption capacity thereof, are carried out alternately. The resulting CO is converted into H2 and CO2, and the converted CO2 is absorbed by the carbon dioxide adsorbent and is adsorbed outside the equilibrium system. Accordingly, methane is inhibited from co-generating. Hence, the reformed fuel gas is mostly composed of H2 and is free from methane, and the reaction temperature limitation, i.e., from 700 to 900° C., in the steam reforming reaction is not applicable any more.

The invention relates to a method and apparatus for sequestering CO2 gas and releasing natural gas from underground coal and / or gas shale formations using CO2 gas captured from the flue gas of a coal burning power plant, and processing it to produce cold liquid pressurized CO2, and injecting the cold liquid CO2 under pressure to create fractures within the formation and causing the CO2 to be adsorbed into the coal or gas shale and CH4 to be desorbed, released and recovered. No high volume of water, no toxic additives to the water and no sand proppants are used for hydro-fracture of the gas shale or coal bed.

A composite catalyst for preparing hydrogen by reforming the CO2 adsorbed and intensified methane vapor is proportionally prepared from CaO, NiO and Al2O3 as carrier. It features that the heat generated by reaction between calcium oxide and CO2 is used to promote said reforming reaction. Its preparing process is also disclosed.

The invention provides a functionalized ZIF type metal organic framework (MOF) porous material. A framework of the material comprises metal ions Zn<2+> or Co<2+> as well as imidazole and aminobenzimidazole. The material is excellent in physical and chemical stability and overcomes the defect that a traditional MOF porous material is sensitive to water; the material has a good CO2 adsorption property; besides, a lithium ion battery manufactured with the material as an electrode material has good electrochemical properties, and furthermore, after N cycles, the specific discharge capacity of the lithium ion battery tends to be stable, wherein N is greater than or equal to 10; as a result, the functionalized ZIF type MOF porous material has bright application prospect in the field of lithium ion batteries.

An adsorbent for carbon dioxide may include a composite metal oxide including a divalent first metal (M1), a trivalent second metal (M2), and at least one polyoxometalate (POM) ion selected from an anion represented by a first formula (e.g., Chemical Formula 1) and an anion represented by a second formula (e.g., Chemical Formula 2). A capture module for carbon dioxide may include the adsorbent.

The invention discloses a shale gas reservoir pore structure quantitative calculation method based on nuclear magnetic resonance. The shale gas reservoir pore structure quantitative calculation methodcomprises the following steps: collecting cores; drilling parallel samples, carrying out oil and water self-adsorption nuclear magnetic resonance experiment measurement; contrastively analyzing the difference of a parallel sample oil and water nuclear magnetic resonance T2 spectrum, and determining the distribution of different wetting pore types on the nuclear magnetic resonance T2 spectrum; obtaining a shale gas reservoir full-pore distribution curve according to high-pressure pressurized mercury, nitrogen adsorption and carbon dioxide adsorption; furthermore, obtaining an intersection plate of pore diameters and corresponding T2 time; and according to the intersection plate of different pore types of pore diameters and corresponding T2 time, establishing a quantitative calculation model of the pore diameters according to the pore types. The method has the advantages that a shale gas reservoir pore full-pore distribution curve can be quantitatively calculated through the technology;simultaneously, the nuclear magnetism measurement is quick, simple and loss-free, and is higher in practicability by compared with high-pressure pressurized mercury, nitrogen adsorption and carbon dioxide adsorption; and compared with a conventional method, the calculation result is more accurate.

The invention discloses a silicon-containing nano calcium oxide as adsorbent to hot carbon dioxide, which is prepared by: coating the nano CaCO3 with 2-10 SiO2 with gel-sol method or mixing directly them to prepare nano CaCO3 powder contained silicon; mixing with plasticizer to shape, and calcining at 600-80Deg. It also discloses the application of this product in methane water vapor reforming and making hydrogen industry. This adsorbent reduces regeneration temperature and energy consumption greatly, and has well thermal stability.

A method of processing carbon dioxide adsorbent for use in a CO2 removal system. The method includes combining a polymer, lithium hydroxide (LiOH), and lubricant that dissolves the polymer to form a first LiOH adsorbent. A structure may be formed using the first LiOH adsorbent. The lubricant may be extracted from the structured LiOH adsorbent using a solvent to form a second LiOH adsorbent. The solvent may be removed from the second LiOH adsorbent to form a third LiOH adsorbent. The third LiOH adsorbent may be hydrated to form a fourth LiOH adsorbent having a water content above an anhydrous level.

The invention discloses an organic amino supported metallic organic framework-porous polymer composite material. The material consists of organic amino, a metallic organic framework material and a porous polymer of multi-stage pore structures which are mutually communicated, wherein metallic organic framework crystal granules are embedded into pore wall surfaces of pore walls of the porous polymer; the organic amino is bonded with the pore wall surfaces of the porous polymer through chemical bonds and bonded with the surface of the metallic organic framework through chemical bonds or coordination bonds; the composite material has a specific surface area greater than or equal to 50m<2> / g. The invention further provides a preparation method of the organic amino supported metallic organic framework-porous polymer composite material. The preparation method comprises the following three steps: carrying out high inner phase emulsion template crosslinking copolymerization, carrying out MOF (Metallic Organic Framework) in-situ growth or MOF multi-time growth, and carrying out organic amino supporting. The organic amino supported metallic organic framework-porous polymer composite materialdisclosed by the invention is used for capturing and separating CO2 and has the advantages of being high in CO2 adsorption capacity / velocity / selectivity, rapid in desorption speed, high in adsorption / desorption circulation stability, excellent in high-temperature and moisture resistance, and the like.

The invention provides a preparation method for a calcium-based CO2 sorbent. The preparation method comprises the following steps: mixing calcium precursor and an inert carrier precursor with a solvent so as to obtain a mixed solution containing the calcium precursor and the inert carrier precursor; stirring the mixed solution so as to allow the calcium precursor and the inert carrier precursor to be evenly mixed; then drying the mixed solution with a spray dryer so as to obtain a solid; and finally calcining the solid to obtain the calcium-based sorbent used for capturing CO2. The calcium-based CO2 sorbent prepared by using the method has good cyclic CO2 adsorption / desorption capacity and stability in cyclic adsorption / desorption of CO2 at a high temperature, is suitable for cyclic capture of CO2 at a high temperature, and has the characteristics of low energy consumption and small consumption of time.

The invention relates to a method for evaluating evolution of different types of pores in shale. The method can be used in the field of unconventional oil and gas research. Along with the increasing of shale burial depth or maturity, all kinds of pores (including intergranular pores, grain inner pores, organic pores and cracks) developed in the shale are constantly changed so that the storage amount of shale oil and gas is influenced. According to the high resolution electron scanning electron microscopy map of shale, based on building of the classification standard and pore identification of different types of pores in shale, surface porosities of different types of pores are extracted. Through combination with data of low temperature N2 and CO2 adsorption experiments and high pressure mercury experiments, the total volume of the pores is acquired and an evolution map of various types of pores is built. The method has an important application value for unconventional shale oil and gas resource exploration.

The invention relates to a method for synthesizing a heterogeneous atom doped carbon material through a one-step process. The method comprises the following steps of uniformly dispersing a carbon material and a heterogeneous atom source into water and / or ethanol to obtain a mixed solution, and carrying out hydrothermal reaction at 120-200 DEG C for 12-48 hours to prepare the heterogeneous atom doped carbon material, wherein a heterogeneous atom comprises at least one of N, S, B, P and F. The heterogeneous atom doped carbon material prepared according to the method disclosed by the invention is doped with the heterogeneous atom, keeps the original properties of the carbon material, namely surface area, aperture distribution, crystal structure and the like are basically unchanged, has good oxygen reduction property, hydrogen storage property, carbon dioxide adsorption property and the like and can be used for the fields of fuel-cell catalysts, lithium batteries, supercapacitors, absorption, gas storage and the like.

The invention relates to a nitrogen-doped porous hollow carbon sphere carbon dioxide adsorption material as well as a preparation method and application thereof. The preparation method comprises the following steps: adding SiO2 sphere flowers into mixed liquid of deionized water, absolute ethyl alcohol and ammonia water, and carrying out ultrasonic oscillation until the SiO2 sphere flowers are completely dispersed; and then adding a dopamine hydrochloride water solution, uniformly stirring at the room temperature, filtering, washing, drying, and processing at 700-900 DEG C for 2-4 hours in a N2 atmosphere so as to obtain nano-composite spheres; and finally impregnating the nano-composite spheres in hydrofluoric acid to remove the SiO2 sphere flowers, filtering, washing, and drying, so as to obtain the nitrogen-doped porous hollow carbon sphere CO2 adsorption material. The adsorption material is a porous hollow carbon sphere, the particle sizes of porous hollow nano-carbon spheres are about 400nm, the porous hollow nano-carbon spheres are uniform and regular, and the adsorption material has high nitrogen content, adsorptive property, specific surface area and pore volume and high-dispersed regular appearance, the surface of the adsorption material contains rich amino active sites, and the adsorption material can be applied to efficient adsorption of industrial CO2.

A carbon dioxide separation method and a carbon dioxide separation apparatus capable of maintaining a carbon dioxide adsorption capacity for a long term by collecting an amine compound that evaporates during an operation of the apparatus and reloading the amine compound onto a carbon dioxide adsorbent. An amine collector and an amine aqueous solution preparation device are connected to an adsorbent-packed tank packed with a carbon dioxide adsorbent. An amine compound that evaporates from the carbon dioxide adsorbent during an operation of the apparatus is collected by the amine collector into the amine aqueous solution preparation device. The collected amine compound is reloaded onto the carbon dioxide adsorbent via a supply line.

A tunable species removal media including a polymer-impregnated porous material with the introduction of heteroatoms into the porous material during the synthesis of the oxide support. The polymer can be poly(ethyleneimine) (PEI), the porous material a framework of silica nanoparticles, and the heteroatoms selected from Zr, Ti, Fe, Ce, Al, B, Ga, Co, Ca, P, and Ni. The media has a CO2 adsorption of greater than 0.19 mmol CO2 / g when exposed to a 400 ppm CO2 / Ar flow at a rate of 100 mL / min, and can also have a CO2 adsorption of greater than 0.65 mmol CO2 / g when exposed to a 10% CO2 / Ar flow at a rate of 100 mL / min. The media can have a heteroatom / Si molar ratio greater than or equal to 0.002.

A carbonaceous electrode having improved capacities for doping and dedoping of a cell active substance, such as lithium, and suitable for a non-aqueous secondary battery, is constituted by a carbonaceous material obtained by carbonizing an aromatic condensation polymer formed by condensation of an aromatic compound having a phenolic hydroxy group and an aldehyde. The carbonaceous material is characterized by an atomic ratio H / C between hydrogen atoms and carbon atoms of below 0.1, a carbon dioxide adsorption capacity of at least 10 ml / g, and an X-ray scattering intensity ratio IW / ID of at least 0.25, wherein IW and ID represent scattering intensities as measured in a wet state and a dry state, respectively, at a parameter s=2.sin theta / lambd of 0.5 nm-1, wherein theta denotes a scattering angle and lambd denotes a wavelength of X-rays in X-ray small-angle scattering measurement.

The invention relates to a novel amino hybrid SiO2 aerogel material and an application thereof. The novel amino hybrid SiO2 aerogel material is prepared by the method comprising the steps of firstly, uniformly mixing all reactants, and then putting the mixture into a drying oven for gelling; after aging of a wet gel, performing solvent replacement and supercritical drying to obtain an amino hybrid SiO2 aerogel, wherein the amino hybrid SiO2 aerogel can be used for CO2 adsorption. The obtained amino hybrid organic aerogel is subjected to CO2 adsorption application study. The method is simple in process and easy in industrial production, and the prepared material is large in adsorption capacity and good in selectivity to CO2 gas and has good circulating stability. The technology has an application value in the aspect of energy conservation and emission reduction.

A CO2 recovery method and apparatus for desorbing and recovering carbon dioxide with low energy consumption from a gas discharged from a power generation plant having a boiler and a steam turbine. The adsorption and the desorption of carbon dioxide are performed alternately in two CO2 absorbers and located in a CO2 recovery apparatus, which each hold a carbon dioxide adsorbent. When carbon dioxide is desorbed, steam discharged from an outlet of a steam turbine of a power generation plant is partially branched before introduced into a condenser, and sent to a steam compressor. The partially branched steam is compressed in this compressor, and then sent to a cooling device. By cooling, the steam for desorption is prepared. The steam prepared in the cooling device is supplied into a CO2 absorber to desorb carbon dioxide. Accordingly, waste steam, before it is introduced into the condenser, is usable for desorption.

The present invention discloses a process for producing a nano calcium carbonate slurry from a feedstock of waste gypsum, wherein: an aqueous gypsum slurry of the feedstock is mixed with ammonia water by stirring; with CO2 injected in the slurry is under continuous stirring until the calcium sulfate in the waste gypsum is completely carbonated into nano calcium carbonate; after filtration, the filter cake is dispersed in water to obtain the nano calcium carbonate slurry. This process is easy to operate and to obtain a low-cost and a lower decomposition temperature of calcium carbonate. The present invention also discloses a nano calcium carbonate slurry and its application in preparation of a CaO-based carbon dioxide adsorbent and complex catalyst used for a reactive sorption enhanced reforming process for hydrogen production from methane. The CaO-based carbon dioxide adsorbent prepared shows good cycle stability and fast sorption rate, and complex catalyst used for reactive sorption enhanced methane steam reforming can obtain the hydrogen with purity of more than 90%.

The invention discloses a method for preparing a metal organic framework-graphene oxide composite material. The method comprises the following steps: adding graphite powder into a mixed solution of concentrated sulfuric acid, sodium nitrate and potassium permanganate for oxidizing, adding water for hydrolyzing, and finally, adding H2O2, thereby obtaining graphene oxide; filtering, washing with water, centrifuging, and performing spray drying, thereby obtaining solid powder GO; and dispersing the solid powder GO in water, performing ultrasonic treatment, adding Cr(NO3)3.9H2O, terephthalic acid and hydrofluoric acid, reacting at the temperature of 210-230 DEG C for 67-77 hours, washing and soaking by using N,N-dimethyl formamide, drying, and activating, thereby obtaining the purified GrO@MIL-53 adsorbing material, namely the metal organic framework-graphene oxide composite material. Compared with common MIL-53, the adsorbent prepared by the method has the advantages that the specific surface area and pore volume are increased, and the adsorbent has relatively high CO2 adsorption capacity.