17 results about "Electrochemical adsorption" patented technology

The invention relates to an electrochemical gas separation cell (10, 10') for separating a gaseous Lewis acid, in particular carbon dioxide, from a fluid mixture containing the Lewis acid, in particular a gas mixture, said separation cell having an adsorption electrode (20, 20') comprising at least one electrochemically active material for the reversible electrochemical adsorption of the Lewis acid, a counter electrode (30, 30'), and a separator (40, 40') between the adsorption electrode (20, 20') and the counter electrode (30, 30'). In order to provide a new type of gas separation cell (10, 10') for separating a gaseous Lewis acid, in particular one which can be used for an electrochemical (potential) swing adsorption process or an electro(chemical) swing adsorption (ESA) process, a membrane (60, 60') is placed between the adsorption electrode (20, 20') and a feed chamber (50) for feeding the fluid mixture. The invention also relates to such a gas separation system and to a method for operating same.

The invention relates to an electrochemical adsorption material and device for capturing carbon dioxide, the adsorption material is composed of an integrated cathode adsorption material, an integrated anode charge balance material and a gel electrolyte, the integrated cathode adsorption material is a polynaphthoquinone-carbon cloth composite material, and the integrated anode charge balance material is a polynaphthoquinone-carbon cloth composite material. The integrated anode charge balance material is a ferrocene-carbon cloth composite material, and the gel electrolyte is a polyion liquid-silicon dioxide gel electrolyte. The method has the advantages that the electrochemical adsorption material has the advantages of high activity (good adsorption performance), high stability (the performance is not reduced after long-term use) and the like, a matched device is modularized, easy to maintain and compact in size, auxiliary equipment is not needed, the capacity is not influenced by the feeding concentration, the purity of released CO2 can be close to 100%, efficient trapping of a wide-concentration CO2 gas source (0.6%-10%) is achieved, and the method is suitable for industrial production. Capturing efficiency and energy consumption control are both considered, and multi-scene application requirements are met.

This invention discloses a polyphosphazene / MXene self-supporting electrode loaded with cobalt single atoms, its preparation method, and its application, belonging to the field of seawater uranium extraction technology. Ti3AlC2 powder is etched in an HCl-LiF mixed solution and then ultrasonically exfoliated to obtain Ti3C2T. x Nanosheet suspension; simultaneously, hexachlorocyclotriphosphazene, 4,4'-dihydroxydiphenyl sulfone, and cobalt salt were dissolved in a solvent, and triethylamine was added. A condensation reaction was then carried out under ultrasonication to obtain Co-PZS; then Ti3C2T x After the nanosheet suspension is uniformly mixed with Co-PZS and carbon fiber fabric, it is transferred to a hydrothermal reactor for hydrothermal reaction. The resulting hydrothermal reaction product is then dried and calcined to obtain a polyphosphazene / MXene self-supporting electrode loaded with cobalt single atoms. This electrode is used for the electrochemical adsorption of uranyl ions in the solution system and exhibits excellent comprehensive uranium extraction performance, with advantages such as high capacity, fast rate, strong selectivity, and good stability, meeting the application requirements of seawater uranium extraction.

The invention relates to an electrochemical gas separation cell (10) for separating a gaseous Lewis acid, in particular carbon dioxide, from a fluid mixture containing the Lewis acid, in particular a gas mixture. In order to provide a new type of gas separation cell (10) for separating a gaseous Lewis acid, in particular one which can be used for an electrochemical (potential) swing adsorption process or an electro(chemical) swing adsorption (ESA) process, such process being in particular quasi-continuous, the cell (10) comprises a first (20) and a second (20') adsorption electrode each having at least one electrochemically active material for the reversible electrochemical adsorption of the Lewis acid, and a separator (30) between the first (20) and second (20') adsorption electrodes, and a first membrane (60) is placed between the first adsorption electrode (20) and a first feed chamber (50) for feeding the fluid mixture. The invention also relates to such a gas separation system and to a method for operating same.

The invention relates to an electrochemical gas separation cell (10, 10') for separating a gaseous Lewis acid, in particular carbon dioxide, from a fluid mixture containing the Lewis acid, in particular a gas mixture, said separation cell having an adsorption electrode (20, 20') comprising at least one electrochemically active material for the reversible electrochemical adsorption of the Lewis acid, a counter electrode (30, 30'), and a separator (40, 40') between the adsorption electrode (20, 20') and the counter electrode (30, 30'). In order to provide a new type of gas separation cell (10, 10') for separating a gaseous Lewis acid, in particular one which can be used for an electrochemical (potential) swing adsorption process or an electro(chemical) swing adsorption (ESA) process, a membrane (60, 60') is placed between the adsorption electrode (20, 20') and a feed chamber (50) for feeding the fluid mixture. The invention also relates to such a gas separation system and to a method for operating same.

The present invention relates to an electrochemical gas separation cell (10) for separating a gaseous Lewis acid, in particular carbon dioxide, from a fluid mixture, in particular a gas mixture, containing the Lewis acid.To provide a new type of gas separation cell (10) for the separation of a gaseous Lewis acid, in particular one that can be used for, especially quasi-continuous, electrochemical (potential) swing adsorption (ESA), the cell (10) comprises a first (20) and a second (20') adsorption electrode, each with at least one electrochemically active material for the reversible electrochemical adsorption of the Lewis acid, and a separator (30) arranged between the first (20) and second (20') adsorption electrodes, wherein a first membrane (60) is arranged between the first adsorption electrode (20) and a first feed chamber (50) for supplying the fluid mixture. Furthermore, the invention relates to such a gas separation system and an operating method for it.

The present invention relates to a method of recovering lithium. More particularly, the present invention relates to a method of recovering lithium, including a step of obtaining a leachate, in which a lithium component is dissolved, from cathode material powder, and a step of purifying a lithium component by introducing the leachate into a flow capacitive deionization apparatus. According to the method of the present invention, by easily removing impurities from a leachate, in which a lithium component is dissolved from cathode material powder, through an electrochemical adsorption and desorption process, high-purity lithium may be recovered, and an eco-friendly benefit may be obtained by reducing an amount of wastewater generated. In addition, by simultaneously performing the purification and filtration of lithium, the process may be simpler than a conventional process, a continuous process is possible, and processing cost and energy may be reduced.

The present invention relates to a lithium recovery method and, more specifically, to a lithium recovery method comprising the steps of: obtaining a leachate in which a lithium component is dissolved from positive electrode material powder; and purifying the lithium component by introducing the leachate into a flow-capacitive deionization device. According to the present invention, it is possible to provide a lithium recovery method that is eco-friendly by enabling high-purity lithium to be recovered and wastewater generation to be reduced by easily removing impurities through electrochemical adsorption and desorption processes from the leachate in which the lithium component is dissolved from the positive electrode material powder. In addition, since the purification and filtration of lithium are simultaneously performed, the process is simpler compared to the prior art and a continuous process is possible, thereby providing the method with reduced process costs and energy.

The invention provides a method for recovering boron and lithium in wastewater through electrochemical-membrane concentration coupling, which comprises the following steps: S1, adjusting the pH value of wastewater containing boron and lithium to be alkaline to obtain lithium-boron wastewater after the pH value is adjusted; s2, performing primary reverse osmosis treatment on the lithium-boron wastewater after the pH value is adjusted to obtain primary RO concentrated water and primary RO fresh water; s3, carrying out secondary reverse osmosis treatment on the primary RO fresh water to obtain secondary RO concentrated water and secondary RO fresh water, returning the secondary RO concentrated water to S2, mixing the secondary RO concentrated water with the lithium-boron wastewater subjected to pH value regulation, and carrying out primary reverse osmosis treatment; s4, adjusting the pH value of the primary RO concentrated water to be acidic; and S5, carrying out boron and lithium separation on the primary RO concentrated water after the pH value is adjusted by adopting an electrochemical adsorption-separation technology to obtain a lithium-rich solution and a boron-containing solution. According to the method, efficient separation and recovery of lithium and boron can be achieved, and comprehensive recovery of lithium, boron and fresh water resources is achieved.

This invention discloses an electrochemical carbon membrane reactor and its operating process for removing cesium ions from water, relating to the field of cesium ion separation. The device mainly includes a functional carbon membrane anode, a functional carbon membrane cathode, a regulated power supply, a water pump, sensors, and a casing. During operation, the cesium-containing solution to be treated is pumped from the raw water tank to port A, entering the anode chamber. It then sequentially penetrates the carbon membrane anode and cathode, reaching the cathode chamber and finally flowing into the product water tank from port B, yielding treated water. This invention utilizes both the electrostatic repulsion of the carbon membrane anode and the electrochemical adsorption of the carbon membrane cathode as core processes to remove cesium ions from water. Furthermore, the device's performance can be restored and regenerated through periodic removal of the concentrate and electrode reversal. This process has the advantages of simple equipment, simple operation steps, low production cost, and high cesium ion removal rate, and can be applied to the effective separation and removal of cesium ions in industrial wastewater, salt lake water, nuclear wastewater, seawater, and other water bodies.

The present invention relates to an electrochemical gas separation cell (10,10') for separating a gaseous Lewis acid, in particular carbon dioxide, from a fluid mixture, in particular a gas mixture, containing the Lewis acid, which comprises an adsorption electrode (20,20') with at least one electrochemically active material for the reversible electrochemical adsorption of the Lewis acid, a counter electrode (30,30') and a separator (40,40') arranged between the adsorption electrode (20,20') and the counter electrode (30,30'). In order to provide a new type of gas separation cell (10,10') for the separation of a gaseous Lewis acid, in particular which can be used for electrochemical (potential) swing adsorption or electro-swing adsorption (ESA), a membrane (60,60') is arranged between the adsorption electrode (20,20') and a feed chamber (50) for supplying the fluid mixture.Furthermore, the invention relates to such a gas separation system and an operating method for it.

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.

The invention relates to an electrochemical gas separation cell (10) for separating a gaseous Lewis acid, in particular carbon dioxide, from a fluid mixture containing the Lewis acid, in particular a gas mixture. In order to provide a new type of gas separation cell (10) for separating a gaseous Lewis acid, in particular one which can be used for an electrochemical (potential) swing adsorption process or an electro(chemical) swing adsorption (ESA) process, such process being in particular quasi-continuous, the cell (10) comprises a first (20) and a second (20') adsorption electrode each having at least one electrochemically active material for the reversible electrochemical adsorption of the Lewis acid, and a separator (30) between the first (20) and second (20') adsorption electrodes, and a first membrane (60) is placed between the first adsorption electrode (20) and a first feed chamber (50) for feeding the fluid mixture. The invention also relates to such a gas separation system and to a method for operating same.

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 utility model relates to the technical field of aquaculture tail water treatment, in particular to a tail water treatment device which comprises a floating plate and a box body arranged at the top of the floating plate, one end of the box body is provided with a water inlet, the water inlet is provided with a water suction pump externally connected with a power supply, the other end of the box body is provided with a water outlet, and a first one-way guide plate is arranged in the box body. The first one-way flow guide plate and one end of the box body form an electrochemical adsorption area communicated with the water inlet, the first one-way flow guide plate and the other end of the box body form an algal-bacterial symbiotic area, the algal-bacterial symbiotic area is divided into a cation reaction area, a liquid storage area and an anion reaction area through two partition plates, and two liquid storage tanks are arranged in the liquid storage area between the two partition plates; the two liquid storage tanks are respectively communicated with the cation reaction area and the anion reaction area, and the cation reaction area and the anion reaction area are respectively communicated with the water outlet. According to the tail water treatment device, electrochemical adsorption and bacteria-algae adsorption are combined to treat tail water, so that the tail water treatment efficiency and treatment effect are improved.

The present invention relates to a gas separation cell (10) for separating a gaseous Lewis acid, in particular carbon dioxide, from a fluid mixture, in particular a gas mixture, containing the Lewis acid, which comprises an adsorption electrode (20) with at least one electrochemically active material for the reversible electrochemical adsorption of the Lewis acid, a counter electrode (30) and a separator (40) arranged between the adsorption electrode (20) and the counter electrode (30), as well as an inlet (50) for introducing the fluid mixture (1) into the gas separation cell (10) and / or into a gas separation system (100) consisting of at least two cells (10).To provide a new type of gas separation cell, in particular one that can be used for electrochemical swing adsorption (ESA), the inlet (50) is at least partially formed by at least one inlet opening (21, 31, 41) in the form of a through-hole in the adsorption electrode (20) and / or in the counter electrode (30) and / or in the separator (40). Furthermore, the invention relates to such a gas separation system as well as an electrode (20, 30), a separator (40), and a bipolar plate (70) therefor.