47 results about "Electrochemical adsorption" patented technology

The invention discloses a water purification device and method for removing microplastics, and belongs to the technical field of water treatment. The water purification device for removing the micro-plastics comprises an electrochemical adsorption oxidation unit and a self-cleaning desorption unit, the electrochemical adsorption oxidation unit comprises a cylinder, a cathode, a filter screen, an anode, a three-dimensional particle electrode and a supporting layer; a sewage inlet for sewage containing micro-plastics to enter the electrochemical adsorption oxidation unit is formed in the bottom of the side surface of the barrel; the cathode is sleeved in the cylinder and is a cylindrical stainless steel mesh electrode, and the bottom of the cathode is separated from the inner wall of the bottom of the cylinder; the bottom of the filter screen is connected with the inner wall of the bottom of the barrel; the anode is positioned in the cylinder; the three-dimensional particle electrode is arranged between the filter screen and the anode; the bottom of the supporting layer is provided with an opening with the aperture smaller than the diameter of the three-dimensional particle electrode. The method is applied to removal of the micro-plastics in the water, realizes efficient removal of the micro-plastics in the water without adding extra chemical agents, and has the characteristic of being recyclable.

The invention discloses a preparation method of a phosphate radical intercalation NiCoFe-LDH catalyst and application of the phosphate radical intercalation NiCoFe-LDH catalyst in hydrogen production through water electrolysis, and belongs to the technical field of hydrogen production through electrolysis. The method comprises the following steps: carrying out electrochemical adsorption and electrochemical oxidation treatment on a NiCoFe-LDH material in a phosphating solution, so as to obtain the phosphate radical intercalation NiCoFe-LDH catalyst. The phosphating solution is a sodium hypophosphite monohydrate solution. According to the preparation method, phosphate radicals are successfully introduced between LDH material layers in a manner of taking the phosphate radicals as a precursor for the first time and an electrochemical oxidation manner, so that the phosphate radical intercalation nickel-cobalt-iron-based hydrotalcite with a nanosheet structure is prepared; the material is stable in structure and low in overpotential in the water electrolysis hydrogen production process, stable operation can be conducted for 400 h when the current density is 400 mA. Cm <-2 >, and the potential retention rate reaches 95% or above; the preparation method is simple, the used reagents are low in cost and rich in source, and the catalyst is suitable for macroscopic preparation and has popularization and application prospects.

The invention relates to the technical field of aquaculture tail water treatment, in particular to a floating type tail water treatment system which comprises a floating plate, a box body arranged at the top of the floating plate and a solar power generation device, a water inlet and a water outlet are formed in the two ends of the box body respectively, a water suction pump is arranged at the water inlet, and a first one-way flow guide plate is arranged in the box body; the two sides of the first one-way guide plate are respectively provided with an electrochemical adsorption area and an algal-bacterial symbiosis area, the electrochemical adsorption area is communicated with the water inlet through a primary adsorption area, the algal-bacterial symbiosis area comprises a cation reaction area, an anion reaction area and two liquid storage tanks, and the two liquid storage tanks are respectively communicated with the water outlet through the cation reaction area and the anion reaction area; the solar power generation device comprises a photovoltaic panel and a storage battery which are connected, the photovoltaic panel is arranged on the top of the floating plate, the storage battery is located on the top of the electrochemical adsorption area, and the water suction pump and an anode and a cathode in the electrochemical adsorption area are connected with the storage battery. All the areas in the box body are mutually independent, and cleaning and subsequent maintenance in the using process can be facilitated.

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 discloses an aerogel GCP composite electrode material, a preparation method thereof and application of the aerogel GCP composite electrode material in electro-adsorption recovery of rhenium. The composite electrode material is an aerogel GCP composite electrode material formed by compounding ginger carboxymethyl cellulose GCNF and polyaniline PANI. According to the preparation method, the natural structure of ginger cellulose and the conductivity and doping property of polyaniline are fully utilized, supramolecular compounding is carried out through hydrogen-bond interaction, then freeze drying is carried out, the graded porous conductive aerogel (GCP) with excellent electrochemical properties and adsorption performance is prepared, and the graded porous conductive aerogel has high adsorption capacity and higher adsorption rate on rhenium ions. And by combining an electrochemical technology, the performance of electric enhancement Re (VII) capture is researched, and the adsorption mechanism and basic theoretical research of electrochemical Re (VII) adsorption are enriched.

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.

Provided in the present application is a modular device for electrochemical lithium extraction. The modular device comprises at least one electrochemical adsorption unit, wherein the inside of each electrochemical adsorption unit is provided with a feed-solution chamber and a recovery-solution chamber, an anion exchange membrane being provided between the feed-solution chamber and the recovery-solution chamber; and a lithium-lean electrode is provided on the side of the feed-solution chamber facing away from the recovery-solution chamber, the lithium-lean electrode being electrically connected to a negative electrode of a power supply, and a lithium-rich electrode is provided on the side of the recovery-solution chamber facing away from the feed-solution chamber, the lithium-rich electrode being electrically connected to a positive electrode of the power supply. In the present application, by means of the modular structural configuration of an electrochemical adsorption unit, the power consumption for lithium extraction is reduced due to a reduction in the distance between electrodes, and high-ratio concentration of lithium is achieved; scalable control over a lithium extraction device is achieved by means of adding or removing the electrochemical adsorption unit; and the present device has a simple structure and involves easy operation overall, runs continuously and stably, and realizes green, continuous and efficient extraction and recovery of lithium from a low-lithium-concentration solution.

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 invention discloses a device and a method for treating heavy metal wastewater through electrochemical adsorption. The method comprises a working electrode, a counter electrode, an insulation isolation part, a fixed frame and a direct-current power supply, the working electrode is formed by coating a graphite paper substrate with a composite electrode material containing titanium dioxide (TiO2), ferroferric oxide (Fe3O4), conductive carbon black and polyvinylidene fluoride (PVDF); the counter electrode is made of pure graphite paper and is parallel to the working electrode; the insulating isolation part is arranged between the working electrode and the counter electrode; the fixed frame is used for fixing the working electrode, the counter electrode and the insulated isolation component; the direct-current power supply is connected with the working electrode and the counter electrode. The device is formed by arranging a composite electrode and a graphite paper counter electrode in parallel, isolating by a polytetrafluoroethylene gasket, fixing by an acrylic plate and externally connecting a direct-current power supply. The electrode adsorbs Cd < + > in electrolyte-containing wastewater. By combining the high adsorbability of TiO2, the magnetic recovery characteristic of Fe3O4 and a conductive network, the method has the advantages of high efficiency, stability and easiness in recovery.

The utility model discloses an electroplating impurity treatment auxiliary cylinder which comprises a cylinder body located outside an electroplating main cylinder and provided with a liquid storage tank, the cylinder body is connected with a liquid inlet pipe and a liquid outlet pipe, and electroplating liquid medicine enters the liquid storage tank from the electroplating main cylinder through the liquid inlet pipe and flows back to the electroplating main cylinder through the liquid outlet pipe; the electrode assembly is arranged in the liquid storage tank and comprises an adsorption plate and two anode groups, and the two anode groups are arranged on the two sides of the adsorption plate respectively; and the electrifying assembly is used for electrifying the electrode assembly so as to drive impurities in the electroplating liquid medicine to be accumulated on the adsorption plate. The continuous circulating auxiliary cylinder is arranged outside the electroplating main cylinder for impurity treatment, parallel operation of the electroplating process and impurity removal is achieved, the electroplating operation of the main cylinder does not need to be interrupted, and the production continuity and the overall efficiency are remarkably improved; and moreover, the electrode assembly and the electrifying assembly are matched to gather and fix metal impurities in the electroplating liquid medicine by utilizing an electrochemical adsorption principle, so that the impurity capturing effect is enhanced.

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 an electrochemical gas deposition cell (10) for deposition of a gaseous Lewis acid, in particular carbon dioxide, which comprises an adsorption electrode (20) with at least one electrochemically active material for the reversible electrochemical adsorption of the Lewis acid and a counterelectrode (30) with at least one electrochemically active material for charge equalization of the adsorption electrode (20). The at least one electrochemically active material of the adsorption electrode (20) and / or the at least one electrochemically active material of the counterelectrode (30) is applied to a carbon material.In order to provide electrochemical gas deposition cells (10) and their adsorption electrodes (20) and / or counter electrodes (30) with a high durability in a simple, cost-effective and series-production manner, in particular which can be used for electrochemical (potential) swing adsorption or electro(chemical) swing adsorption (ESA), the carbon material of the adsorption electrode (20) and / or the counter electrode (30) comprises graphite with a surface area of ​​< 80 m. 2 / g and / or soot with a surface area of ​​≥ 80 m 2 / g. Furthermore, the invention relates to corresponding manufacturing processes as well as electrode materials and electrodes (20,30).

The application discloses a preparation method of a functional carbon membrane and application of the functional carbon membrane in cesium ion separation, and belongs to the technical field of water treatment. The functional carbon membrane material is prepared by taking porous carbon membrane with good conductivity as a base film, loading iron-based oxide on the carbon membrane by using an electrochemical deposition method, and then growing Prussian blue particles in situ. The method can effectively control the loading amount of the Prussian blue particles on the carbon membrane and improve the combination stability between the Prussian blue particles and the carbon membrane. The functional carbon membrane is used for deep treatment of wastewater containing Cs + , and can realize integrated coupling of membrane adsorption and electrochemical adsorption functions. On one hand, the adsorption rate of cesium ions is improved, and the desorption regeneration process of the carbon membrane is simplified. On the other hand, real-time separation of the purified water body can be realized, and the functional carbon membrane has a wide application prospect.

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 discloses a preparation method for electrodepositing a phosphoric acid doped polypyrrole (PPy) / porous carbon (PC) material through a constant voltage method and an application of the phosphoric acid doped polypyrrole (PPy) / porous carbon (PC) material in electrochemical adsorption and recovery of indium in an acid leaching solution of a liquid crystal display (LCD). According to the phosphoric acid doped PPy / PC material, porous carbon coated on the surface of a graphite plate is used as an inorganic matrix, an inorganic-organic composite material mPPy / nH3PO4-PC is obtained through electro-deposition in a solution containing a pyrrole monomer and phosphoric acid with a constant voltage method, and due to the fact that the dosages of pyrrole and phosphoric acid are different during material preparation, the material shows different electro-adsorption effects; the electro-adsorption device adopts a two-electrode system, the material is used as an adsorption electrode, a carbon rod is used as a counter electrode, and an external voltage is applied through a constant-voltage power supply to electrically adsorb In (III) in a solution. The material disclosed by the invention has the characteristics of simplicity in preparation, high adsorption capacity, high adsorption speed, simplicity in operation and the like, thereby having very high application value.

The present invention provides a lithium ion electrically controlled adsorption separation membrane and its preparation method and application. The lithium ion electrically controlled adsorption separation membrane comprises an electrochemical adsorption layer and an ion exchange membrane layer; the electrochemical adsorption layer comprises a composite membrane electrode layer and a two-dimensional material support layer stacked in sequence, the two-dimensional material support layer is connected to the ion exchange membrane layer; the composite membrane electrode layer is obtained by compounding an electrode active material and a two-dimensional material. The electrically controlled adsorption separation membrane constructed by the present invention collects lithium ions by electrically controlled adsorption. + Concentrated Li with SED + Integrates the Li + The continuous and rapid selective electro-controlled adsorption-desorption process achieves efficient enrichment and effectively utilizes the Li + The enriched area increases the Li + concentration to slow down / eliminate the influence of SED concentration polarization, improve the efficiency of lithium concentration and purification, and achieve efficient enrichment, concentration and purification of low-grade lithium.

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 discloses a water purification device and method for removing microplastics, belonging to the technical field of water treatment. The water purification device for removing microplastics includes an electrochemically adsorbing and oxidizing unit and a self-cleaning desorbing unit; the electrochemically adsorbing and oxidizing unit includes a cylinder body, a cathode, a filter screen, an anode, three-dimensional granular electrodes, and a supporting layer; a sewage inlet for sewage containing microplastics to enter the electrochemically adsorbing and oxidizing unit is provided at the bottom side of the cylinder body; the cathode is sleeved inside the cylinder body, is a cylindrical stainless steel mesh electrode, and is spaced from the inner wall of the bottom of the cylinder body at the bottom; the filter screen is sleeved inside the cathode and is connected to the inner wall of the bottom of the cylinder body at the bottom; the anode is located in the middle of the cylinder body; the three-dimensional granular electrodes are arranged between the filter screen and the anode; the bottom of the supporting layer is provided with openings with a pore diameter smaller than the diameter of the three-dimensional granular electrodes. The present invention is applied to the removal of microplastics in water, realizes the efficient removal of microplastics in water without additional chemical agent input, and has the characteristics of being renewable and reusable.

This disclosure provides a method for lithium extraction from brine by electrochemical adsorption and its application. The method includes: placing an electrode containing a low-lithium lithium ion carrier as the cathode electrode in the middle of the brine; adding a lithium ion adsorbent to the brine to enrich the lithium ions in the brine; centrifugally stirring the brine and energizing the electrode to obtain an electrode containing a lithium-rich lithium ion carrier. This disclosure utilizes a lithium ion adsorbent to enrich lithium ions in the brine pool, cleverly employing external force to move the lithium ion adsorbent material, transporting the lithium ion adsorbent to the vicinity of the electrode to form a lithium-rich region. This significantly shortens the distance from the lithium ions to the electrode, thereby improving lithium extraction efficiency and greatly saving extraction time.

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 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, said separation cell having an adsorption electrode (20) comprising at least one electrochemically active material (21) for the reversible electrochemical adsorption of the Lewis acid, a counter electrode (30), and a separator (40) between the adsorption electrode (20) and the counter electrode (30). The aim of the invention is to provide a novel type of gas separation cell, in particular one which can be used for an electrochemical (potential)-swing adsorption process or an electro-swing adsorption (ESA) process. This is achieved in that the cell (10) has a proton-based charge equalization (H+) between the adsorption electrode (20) and the counter electrode (30). The invention also relates to such a gas separation system and to a method for operating same.

The utility model provides an oil fume filtering device and a range hood. The oil fume filtering device comprises a filtering pipeline, and an activated carbon block, a spray purification structure and an ionization purification structure which are arranged in the filtering pipeline. The activated carbon block and the spray purification structure are used for adsorbing and filtering oil fume entering the filtering flue based on a physical adsorption mode, and the ionization purification structure is used for adsorbing and filtering oil fume entering the filtering pipeline based on an electrochemical adsorption mode. In the scheme, the activated carbon block, the spray purification structure and the ionization purification structure are used for adsorbing oil fume based on a physical adsorption mode and an electrochemical adsorption mode respectively, so that the defects of large wind resistance and the like in a mode of adsorbing by purely adopting a plurality of activated carbon blocks in the prior art can be avoided; the oil smoke adsorption efficiency can be improved, and good circulation of airflow is guaranteed.

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 carbon monoxide modified platinum catalyst, a preparation method and application, and particularly relates to a simple electrochemical adsorption method, carbon monoxide forms strong adsorption on the surface of platinum, the electronic structure and electrochemical properties of the surface of platinum are changed, and the carbon monoxide modified platinum catalyst is used as an oxygen reduction catalyst for improving the performance of electrocatalytic oxygen reduction to generate hydrogen peroxide. The method is green, efficient, simple in preparation process and suitable for any platinum catalyst, the prepared carbon monoxide modified platinum catalyst can remarkably improve the activity and selectivity of hydrogen peroxide generated through two-electron oxygen reduction, the hydrogen peroxide yield and Faraday efficiency are obviously improved, and the carbon monoxide modified platinum catalyst has good application prospects.