9 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 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.

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).

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.