23 results about "Reversible adsorption" patented technology

Achieving the selective and reversible adsorption of CO2 from humid, low partial pressures streams such as the flue gas resulting from the combustion of natural gas in combined cycle power plants ( 4% CO2) is challenging due to the need for high thermal, oxidative, and hydrolytic stability as well as moderate regeneration conditions to reduce the energy of adsorption / desorption cycling. Appending cyclic primary, secondary diamines, exemplified by 2-(aminomethyl)piperidine (2-ampd), to the metal-organic frameworks Mg2(dobpdc) (dobpdc4- = 4,4-dioxidobiphenyl-3,3-dicarboxylate), Mg2(dotpdc) (dotpdc4- = 4,4"-dioxido-[1,1':4',1"-terphenyl]-3,3"dicarboxylate) or Mg2(pc-dobpdc) (pc-dobpdc4-- = dioxidobiphenyl-4,4'-dicarboxylate) produces adsorbents of the classes EMM-44, EMM-45, and EMM-46, respectively, that display step-shaped adsorption of CO2 at the partial pressures required for 90% capture from natural gas flue gas at temperatures up to or exceeding 60 °C. Using a cyclic diamine in place of a diamine functionalized with bulky alkyl groups enables fast adsorption / desorption kinetics with sharp CO2 adsorption and desorption steps.

The invention discloses a mine strong brine zero discharge treatment method based on temperature control reversible adsorption and bipolar membrane recycling coupling, and the method specifically comprises the following steps: step 1, filling an adsorption column with an MOF-808-EDTA adsorbent, and then introducing mine strong brine into the adsorption column to adsorb salt ions to obtain produced water and a saturated adsorbent; 2, performing thermal desorption regeneration on the saturated adsorbent to obtain a high-concentration regenerated liquid and a regenerated adsorbent; and 3, introducing the high-concentration regenerated liquid into a salt chamber of a bipolar membrane electrodialysis system BMED, and decomposing the high-concentration regenerated liquid into acid produced by an acid chamber, alkali produced by an alkali chamber and fresh water produced by the salt chamber under the action of an electric field. The problems that in the prior art, an evaporation pond method has leakage pollution, and a mechanical evaporation crystallization method and a deep well filling method are high in operation cost are solved. The invention further discloses a mine strong brine zero discharge treatment system based on temperature control reversible adsorption and bipolar membrane recycling coupling.

The invention discloses a hydrogel-integrated carbon dioxide sensor, a preparation method and an intelligent mask thereof, and relates to the field of blood glucose monitoring, the hydrogel-integrated carbon dioxide sensor comprises a substrate, an interdigital electrode and a hydrogel film; the interdigital electrode comprises a first electrode and a second electrode; the first electrode and the second electrode are symmetrically arranged on the substrate, and a set distance is arranged between the first electrode and the second electrode; the hydrogel film is coated on the first electrode, the second electrode and the substrate. The integrated hydrogel carbon dioxide sensor is integrated on the intelligent mask. According to the carbon dioxide sensor integrated with the hydrogel, the principle that reversible adsorption and desorption reaction of CO2 molecules and the hydrogel causes electrical parameter change is utilized, high-sensitivity detection of the CO2 concentration is achieved, and the blood glucose level of a wearer is indirectly monitored through the change of the CO2 concentration.

The invention discloses a ship flue gas waste heat comprehensive utilization and carbon storage device, and relates to the technical field of ship energy utilization and environmental protection, and the ship flue gas waste heat comprehensive utilization and carbon storage device comprises a flue gas waste heat recovery unit, a cooling unit, a water circulation subsystem and a carbon capture subsystem; the flue gas waste heat recovery unit is used for recovering waste heat of engine tail gas and cylinder sleeve water; the water circulation subsystem comprises at least one first adsorption bed, an evaporator, an expansion power generation unit and a condenser; the first adsorption bed is used for reversibly adsorbing and desorbing water vapor; the evaporator is used for providing water vapor in the adsorption stage of the first adsorption bed; water vapor desorbed by the first adsorption bed is used for driving the expansion power generation unit to do work and then enters the condenser; the second adsorption bed is used for reversibly adsorbing and desorbing carbon dioxide; the second adsorption bed is used for treating the introduced flue gas in the adsorption stage so as to capture carbon dioxide in the flue gas and conveying the desorbed carbon dioxide to the carbon storage device in the desorption stage. The device is simple in structure and high in energy comprehensive utilization efficiency, and has a carbon capture function.

The invention discloses a eutectic solvent as well as a preparation method and application thereof, and belongs to the technical field of styrene adsorption. The deep eutectic solvent comprises alpha-phenethyl alcohol, acetophenone and methyl triphenyl phosphorus bromide, and the adsorption effect of styrene is improved based on multiple and reversible physical and chemical synergistic effects generated between all components of the solvent and styrene molecules. Strong ion-pi interaction is generated between phosphorus cations of methyltriphenylphosphonium bromide in the solvent and benzene ring electron cloud of styrene to form main adsorption driving force; a benzene ring of acetophenone and a benzene ring of styrene form a pi-pi accumulation effect, so that the capturing capability is further enhanced; meanwhile, a hydrogen bond network formed by hydroxyl of alpha-phenethyl alcohol and two receptors constructs a solvent microenvironment with adjustable polarity and matched space, which is more beneficial to dissolution and enrichment of styrene molecules in thermodynamics. The acting forces synergistically realize high-efficiency and high-selectivity reversible adsorption of styrene.

The invention relates to the technical field of energy storage, in particular to a cobalt monatomic modified carbon nanosheet, a preparation method and application of the cobalt monatomic modified carbon nanosheet in a potassium ion battery, carbonyl coal pitch, cobalt nitrate, boric acid and urea are mixed in deionized water, dried and then transferred into a carbonization furnace, and the cobalt monatomic modified carbon nanosheet is prepared through calcination in the argon atmosphere. Cobalt monatomic not only provides abundant active sites for the carbon nanosheets and enhances the reversible adsorption capacity to potassium ions, but also catalyzes the carbon nanosheets to form a partially graphitized structure and enhances the electronic conductivity; the ultrathin carbon nanosheets shorten the diffusion distance of ions and effectively enhance the diffusion efficiency of potassium ions. Therefore, the obtained potassium ion battery shows high specific capacity and good cycling stability. The whole process avoids the pickling step required by the metal monatomic doped carbon material, has the advantages of simplicity and low cost, and provides a new preparation method for the potassium ion battery based metal monatomic modified carbon negative electrode material.

The application discloses a hydrophobic ionic liquid embedded super-crosslinked polymer and a method for preparing and selectively adsorbing toluene vapor, wherein the hydrophobic ionic liquid is used as an embedded compound, the ionic liquid is embedded into the super-crosslinked polymer composed of a crosslinking agent by adjusting the proportion of the connection building blocks of the ionic liquid and the crosslinking agent, and a kind of hydrophobic ionic liquid embedded super-crosslinked polymer is obtained. The hydrophobic ionic liquid embedded super-crosslinked polymer prepared by the application has a super-crosslinked network structure, a large specific surface area, and rich ionic liquid sites, and has high hydrophobicity and can significantly improve the toluene vapor adsorption and separation capacity, so that the efficient, high-capacity and selective reversible adsorption of toluene vapor under high humidity conditions can be realized.

The application provides a kind of gold-containing material gold extraction performance test method, and relates to gold resource dressing technical field.The method comprises the following steps: grinding the gold-containing material to be tested to a specified fineness, and obtaining parallel samples with uniform gold grade by size reduction;an oxygen-free ore pulp system is constructed;the initial concentration of exogenous gold is calculated according to the material grade and the preset leaching rate, and an oxygen-free exogenous gold cyanide solution matching the industrial conditions is prepared;two groups of parallel tests, pure adsorption group and activated carbon synchronous competition group, are set up, and the reaction is carried out synchronously under the same oxygen-free condition until adsorption equilibrium;the gold grade of the original ore sample and the two groups of test ore samples are measured respectively;the total adsorbed gold amount, irreversible gold extraction amount, reversible adsorbed gold amount and irreversible gold extraction rate are calculated according to the test analysis results, and the gold extraction performance test is completed.The systematic interference of gold leaching from the ore itself is eliminated from the root, and the method is suitable for accurate evaluation of gold extraction performance of various gold-containing materials such as gold ore, gold concentrate, roasted slag and oxidized slag.

The invention belongs to the technical field of lithium extraction, and particularly relates to a coated material and a preparation method thereof, a composite electrode and application thereof, and a capacitive deionization lithium extraction system and method. According to the method, a retired NCM positive electrode material is subjected to surface LTO modification to form an NCM (LTO) coated material, then the NCM (LTO) coated material is applied to a capacitive deionization lithium extraction system, and directional enrichment of Li < + > in the salt lake brine is realized through electrochemical driving. According to the technical scheme, material reutilization and lithium extraction functionalization are both considered, on the microstructure, the LTO layer provides stable Ti-O-Li key sites and electrochemical pseudocapacitance behaviors, and a selective lithium intercalation interface is formed; in a macroscopic process, a capacitive deionization system can realize reversible adsorption and desorption through potential control; and in the aspect of resource circulation, direct high-value utilization of retired battery materials and green development of salt lake lithium resources are realized.

An electrochemical device for the reversible adsorption of gases, comprising an electrochemical stack (1) with an electrochemical cell (2), wherein the cell (2) includes an adsorption electrode (3) with an electrochemically active material for the reversible electrochemical adsorption of a gas, a counter electrode (4), and a separator (5) arranged between the adsorption electrode (3) and the counter electrode (4). The stack (1) has an inlet (15) for introducing a gas mixture and an outlet (16) for discharging the adsorbed gas or the processed gas mixture. A reference electrode (6) is arranged between the adsorption electrode (3) and the counter electrode (4). A voltage monitoring unit (12) is connected to the adsorption electrode (3), the counter electrode (4), and the reference electrode (6), wherein the voltage monitoring unit (12) maintains a first voltage (U). a) between the reference electrode (6) and the adsorption electrode (3) and a second voltage (U g ) measures between the reference electrode (6) and the counter electrode (4). The first voltage (U) differs. a ) and the second voltage (U g If the voltages deviate from each other beyond a predetermined level, the voltage monitoring unit (12) will issue an error message.

This invention discloses a method for preparing a high-power sodium-ion battery hard carbon anode material: N,N-dimethylformamide, phosphorus oxychloride, and lignin powder are mixed in an anhydrous closed stirring apparatus under an inert atmosphere, heated to 75-83°C and stirred, then filtered to obtain filter residue rich in imine organic compounds; then added to deionized water and stirred, filtered to obtain formylated lignin powder; the formylated lignin powder is then subjected to high-temperature carbonization under an inert atmosphere to obtain the high-power sodium-ion battery hard carbon anode material. This invention also discloses a sodium-ion battery containing this hard carbon anode material. This invention utilizes the aromatic compounds in lignin to carry out electrophilic substitution reactions, thereby increasing the reversible adsorption of Na on the surface of the hard carbon anode material. + Oxygen-containing groups and oxygen atoms, when doped, will increase the number of active adsorption sites in the material, increase the interlayer spacing, improve the rate performance of the material, and also increase the specific capacity of the material.

The application discloses a kind of gas purification device and glove box and regeneration method, comprising: air inlet pipeline;Air outlet pipeline;Adsorption column;Oxygen adsorption material layer is arranged in the adsorption column;Circulating fan;Regeneration device.The application completely changes the irreversible chemical adsorption oxygen-removing material and high temperature and hydrogen regeneration process in the prior art, but uses reversible adsorption oxygen-removing material and inert gas purging or vacuum physical method, using the reversibility of the combination of oxygen adsorption material and oxygen molecule and the mechanism affected by oxygen gas pressure, so that the oxygen molecule adsorbed by oxygen adsorption material is separated from the adsorption state, and the oxygen adsorption function of oxygen adsorption material is recovered by using inert gas purging or vacuum device.According to actual needs, (1) vacuum can be used;Or (2) normal pressure or low pressure inert gas purging;Or (3) multiple inert gas filling and vacuum way;Or (4) the above-mentioned 3 kinds of ways auxiliary heating, realize the regeneration of oxygen adsorption material.Overcome the complex and safe hidden trouble of hydrogen reduction regeneration process at about 200 DEG C currently used.

The invention relates to an electrochemical device for reversible adsorption of gases, comprising an electrochemical stack (1) having an electrochemical cell (2), wherein the cell (2) comprises an adsorption electrode (3) having an electrochemically active material for reversible electrochemical adsorption of a gas, a counterelectrode (4) and a separator (5) between the adsorption electrode (3) and the counterelectrode (4). The stack (1) has an inlet (15) for admitting a gas mixture and an outlet (16) for discharging the adsorbed gas or the processed gas mixture. There is a reference electrode (6) between the adsorption electrode (3) and the counterelectrode (4). A voltage monitoring unit (12) is connected to the adsorption electrode (3), the counterelectrode (4) and the reference electrode (6), wherein the voltage monitoring unit (12) measures a first voltage (Ua) between the reference electrode (6) and the adsorption electrode (3) and a second voltage (Ug) between the reference electrode (6) and the counterelectrode (4). If the first voltage (Ua) and the second voltage (Ug) are at variance beyond a defined extent, an error message is issued by the voltage monitoring unit (12).

The invention discloses a palladium-plated AB2 type hydrogen storage alloy and a preparation method thereof. The palladium-plated AB2 type hydrogen storage alloy comprises an AB2 type hydrogen storage alloy and a palladium layer arranged on the surface of the AB2 type hydrogen storage alloy, the chemical general formula of the AB2 type hydrogen storage alloy is TiaZrbCrcMndNbeFef, 0.5 < = a < = 0.8, 0.2 < = b < = 0.5, 0 < = c < = 1, 1 < = d < = 2, 0 < = e < = 0.1, and 0 < = f < = 0.1; and the thickness of the palladium layer is 10-30 [mu] m. The palladium layer is electroplated on the surface of the AB2 type hydrogen storage alloy, so that the activation energy of the AB2 type hydrogen storage alloy is reduced, reversible adsorption and release of hydrogen on the AB2 type hydrogen storage alloy are promoted, and the first activation time of the AB2 type hydrogen storage alloy is shortened; in addition, additional protection is provided for the surface of the hydrogen storage alloy, oxidation and impurity accumulation on the surface of the AB2 type hydrogen storage alloy are reduced, and therefore the cycle capacity retention rate of the AB2 type hydrogen storage alloy is increased.

The invention discloses an amino acid ionic liquid embedded super-cross-linked polymer and a preparation method and application thereof in carbon dioxide adsorption, amino acid ionic liquid is used as an embedded compound, and the amino acid ionic liquid is embedded in the super-cross-linked polymer composed of a cross-linking agent by adjusting the ratio of the embedded compound to the cross-linking agent connecting building block, so that the super-cross-linked polymer is obtained. The amino acid ionic liquid embedded super-cross-linked polymer obtained by the preparation method disclosed by the invention has a super-cross-linked network structure, and the adsorption and separation capacity of carbon dioxide is obviously improved by utilizing abundant microporous structures, high specific surface area and abundant alkaline sites; therefore, high-efficiency, high-capacity and reversible adsorption of carbon dioxide gas is realized.

The application belongs to the technical field of metal battery negative electrode materials, and specifically discloses a sulfur-doped hard carbon material and a preparation method and application thereof. The preparation method of the sulfur-doped hard carbon material comprises the following steps: dissolving chitosan in methanesulfonic acid and mixing uniformly; then adding into diethyl ether until white powder is obtained; then removing residual solvent in the white powder to obtain sulfated chitosan; and finally calcining the sulfated chitosan to obtain the sulfur-doped hard carbon material. The sulfur-oxygen acid radical molecular template method effectively anchors the template on the biomass chain through a chemical reaction between the template and the biomass, in the subsequent high-temperature pyrolysis process, the molecular template is decomposed and sacrificed and leaves sub-nanopores in situ, and further effective heteroatom doping is carried out on the pore surface. When the sulfur-doped hard carbon material is applied as a negative electrode in a sodium ion battery, the occurrence of electrolyte-carbon negative electrode interface side reactions can be effectively inhibited, and the reversible adsorption and desorption of sodium ions in the carbon matrix can be promoted, and the first cycle coulombic efficiency is as high as 100%.

The invention provides a preparation method of an iron lattice doped aluminum oxide membrane, and belongs to the technical field of preparation of inorganic ceramic membrane materials. According to the method, a sol-gel process is adopted, Fe < 3 + > is doped and introduced into an aluminum oxide precursor system, the doped Fe < 3 + > promotes gamma-to-alpha phase transformation temperature to be reduced on one hand, and on the other hand, grain growth and pore merging are effectively inhibited, so that the membrane pore size is remarkably reduced, and the pore size distribution range is narrowed. Fe < 3 + > and an aluminum source are subjected to co-hydrolysis and co-polycondensation in the sol stage, and a uniform iron-aluminum composite precursor system is formed; after subsequent heat treatment, Fe enters alpha-Al2O3 crystal lattices in a crystal lattice doping mode and forms a stable Fe-O-Al bonding structure, surface hydroxyl introduced by crystal lattice doping enhances the surface hydrophilicity of the membrane and weakens irreversible adsorption of protein, and thus more stable flux and better anti-pollution performance are achieved while the high protein rejection rate is guaranteed.

The invention belongs to the technical field of gas-sensitive materials, and particularly relates to a synthesis process of a humidity-interference-resistant nitrogen-doped porous carbon heterojunction gas-sensitive material which comprises a substrate, a magnetic ion doped component, a nitrogen-doped porous carbon composite component and a nano photo-thermal center, the substrate is SnO / ZnO composite oxide, the room temperature response performance is excellent, strong response signals can be generated for NO in a weak light environment without additional heating, the problem that a traditional material is weak in room temperature response is solved, the recovery speed is high, photo-thermal assisted desorption and reversible adsorption sites cooperate, the recovery time of the material is remarkably shortened, and the recovery rate is high. The nitrogen-doped porous carbon heterojunction structure effectively reduces humidity interference, and meanwhile, the selective recognition capability on NOs is improved; the response retention rate is high after multiple times of cyclic detection, the long-term use requirement is met, the preparation process is simple and controllable, the cost is moderate, large-scale production is easy, and wide practical application prospects are achieved.

Liquid coating compositions, films, and methods of applying and manufacturing the liquid coating compositions are provided. The liquid coating compositions can include water, where the water can be present in the liquid compositions in an amount from about 30 wt. % to about 70 wt. %. The liquid coating compositions can also include a silica gel that reversibly adsorbs and desorbs water. The silica gel can be present in the liquid coating compositions in an amount from about 5 wt. % to about 30 wt. % and can have an open pore volume from about 0.2 mL / g to about 1.0 mL / g. The liquid coating compositions can also include a polymeric binder, where the polymeric binder can be present in the liquid coating compositions in an amount from about 4 wt. % to about 50 wt. %. Method for controlling moisture and humidity in a building or part of a building using the liquid coating compositions are also provided.

This invention belongs to the field of sensor technology and discloses a method for measuring gas flow velocity using a gas flow sensor based on a graphene oxide thin film. The gas flow sensor includes a substrate and electrodes and a graphene oxide thin film that are in contact with each other disposed on the substrate. The electrodes include a source electrode and a drain electrode. The gas flow sensor of this invention utilizes the reversible adsorption-desorption property of water molecules in graphene oxide to achieve a dramatic change in conductivity induced by airflow, thus endowing the sensor with ultra-high sensitivity and a wide detection range.

To provide a carbon dioxide recovery method and a carbon dioxide recovery device capable of obtaining high purity carbon dioxide by recovering low concentration carbon dioxide contained in the atmosphere by an economically advantageous method.SOLUTION: In a carbon dioxide recovery method, an air supply step of feeding air to an adsorption structure containing an adsorbent capable of reversibly adsorbing and desorbing carbon dioxide to cause the adsorption structure to adsorb carbon dioxide, a preheating step of feeding preheating gas to preheat the adsorption structure, and a regeneration step of feeding regeneration gas to desorb carbon dioxide from the adsorption structure to separate high-concentration carbon dioxide are repeated in this order, and an operation of moving water vapor from the preheating gas to the regeneration gas is performed by using difference in water vapor partial pressure between the preheating gas fed to a preheating zone in the preheating step and the regeneration gas fed to a regeneration zone in the regeneration step as a driving force.SELECTED DRAWING: Figure 1

The application discloses a kind of metal organic framework preparation method, application and device for substrate glass cleaning, belong to substrate glass manufacturing process technical field.The metal organic framework preparation method for substrate glass cleaning provided by the application, by adding 4-methylacetophenone, p-benzene formaldehyde etc into ethanol to obtain Schiff base powder, then react with benzoic acid, zirconium (IV) chloride in N,N-dimethylformamide, MOFs precursor is obtained by autoclave treatment.After cleaning and drying, precursor is stirred in hydrochloric acid and N,N-dimethylformamide mixed solution, filter and evaporate to obtain MOFs-CH.The MOFs-CH material prepared by the method of the application exhibits reversible adsorption-desorption function, can be reused, can reduce industrial cost, and bring environmental protection and economic benefits, suitable for efficient trapping glass powder.

This invention belongs to the field of lithium extraction technology, specifically relating to a coated material and its preparation method, a composite electrode and its application, and a capacitive deionization lithium extraction system and method. This invention utilizes retired NCM cathode materials, which are surface-modified with LTO to form an NCM@LTO coated material, and then applied to a capacitive deionization lithium extraction system to achieve lithium extraction from brine in salt lakes through electrochemical drive. + The technology enables targeted enrichment of lithium. It balances material reuse with lithium extraction functionalization. Microstructurally, the LTO layer provides stable Ti-O-Li bond sites and electrochemical pseudocapacitive behavior, forming a "selective lithium intercalation interface." Macroscopically, the capacitive deionization system allows for reversible adsorption and desorption through potential control. In terms of resource recycling, it enables the direct high-value utilization of retired battery materials and the green development of lithium resources in salt lakes.