14 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 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 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 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 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 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.

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.