27results about How to "Facilitate desorption" patented technology

The application discloses a titanium nitride supported osmium platinum catalyst with a gradient polarization effect, a preparation method of the catalyst and application of the catalyst in fuel cells, and belongs to the field of new energy materials and electrocatalysis technology. The catalyst comprises a TiN carrier and a Pt-Os alloy cluster supported on the carrier, wherein Os is doped in the form of a single atom in a Pt nanocluster. A gradient polarization architecture is constructed inside the catalyst, electrons are directionally transferred in TiN-Pt-Os, and electron-rich Os single atoms act as oxygenophilic sites to capture OH ‑ , adjacent Pt sites dissociate H2, through two-site cooperation and interface water network regulation, significantly accelerating the kinetics of alkaline hydrogen oxidation reaction. The mass activity of the catalyst reaches 11337 A / g, which is 24.7 times that of commercial Pt / C; when applied to an AEMFC single cell, the peak power density reaches 1.49 W / cm 2 , which is 2.7 times that of commercial Pt / C, and has excellent practical application prospect.

The present application relates to the field of ammonia decomposition catalyst preparation, discloses a supported nickel-based catalyst, a preparation method and application thereof, and a method for hydrogen production by ammonia decomposition.A supported nickel-based catalyst, the catalyst containing a barium titanate carrier and a nickel element supported on the barium titanate carrier; the content of nickel is 2-15 wt% based on the total weight of the catalyst in terms of nickel oxide; wherein the average particle size of the catalyst is 1-10 microns.The catalyst has high activity, and when applied to hydrogen production by ammonia decomposition, it has high ammonia decomposition conversion rate at low temperature and large space velocity.

This invention discloses a method for methane extraction and closed-loop carbon fixation in coal seams using hot flue gas-driven combustion-explosion fracturing. First, each horizontal branch well is divided into sections, and perforations are constructed in each section. Then, CH4 is used in each section. 4 Combustion-explosive fracturing technology utilizes in-situ synergistic combustion-explosion reactions to generate gas impact perforation fractures, allowing them to further develop and expand into a fracture network. Then, hot flue gas is sequentially injected into each horizontal branch well. Due to its high temperature, the hot flue gas promotes CH4 (chemical oxygen demand) in the coal seam. 4 Gas desorption, and CO in hot flue gas 2 SO 2 NO 2 Due to its competitive adsorption advantage, it can displace a large amount of CH4 adsorbed in extra-thick coal seams. 4 Gas, then hot flue gas and CH 4 The gas continues to be utilized in a closed loop, improving the efficiency of coal seam methane extraction while simultaneously achieving hot flue gas sequestration. Through this continuous closed-loop utilization process, the efficiency of methane combustion and fracturing, hot flue gas sequestration, and CH4 extraction in various areas of extra-thick coal seams is maximized. 4 Extraction efficiency.

The application belongs to the technical field of ship exhaust purification, and particularly relates to a catalyst for decomposing N2O in the exhaust of a ship ammonia internal combustion engine and a preparation method thereof. 3+ By replacing Co ions in the Co3O4 spinel lattice into the lattice, the doping behavior can effectively reduce the number of hydroxyl groups on the surface of the catalyst, significantly weaken the adsorption and combination ability of water molecules, and thus improve the stability of the catalyst in a high-humidity exhaust environment. As an additive, CeO2 uses its oxygen storage capacity to promote the migration and desorption of oxygen species in the reaction, preventing the deactivation of active sites due to oxygen poisoning. The molecular sieve carrier not only provides a highly dispersed surface for the active component to prevent sintering, but also optimizes the adsorption and activation path of N2O and alleviates the poisoning effect of nitrogen-containing intermediate species or impurities in the exhaust on the Co active center during the reaction.

The invention relates to a copper-indium-silver catalyst, a preparation method thereof and a method for preparing synthesis gas with an adjustable ratio of carbon monoxide to hydrogen through electrocatalysis of carbon dioxide. The preparation method comprises the following steps: dispersing a multi-walled carbon nanotube in water to obtain a dispersion liquid A; dispersing copper nitrate trihydrate, indium nitrate hydrate and silver nitrate in water to obtain dispersion liquid B; mixing the dispersion liquid A and the dispersion liquid B to obtain dispersion liquid C; adding alkali into the dispersion liquid C to obtain a mixed solution D; and filtering and drying the mixed solution to obtain the copper-indium-silver electrocatalyst. The invention also provides the copper-indium-silver catalyst prepared by the method and a method for preparing synthesis gas with an adjustable ratio of carbon monoxide to hydrogen by electrocatalysis of carbon dioxide. According to the copper-indium-silver electrocatalyst provided by the invention, an electron-rich Cu site is formed by utilizing the synergistic effect of three metals, CO2 adsorption and CO desorption are promoted, and HER is inhibited, so that CO2RR and HER are balanced, and the selectivity of carbon monoxide synthesis gas is effectively improved.

The invention relates to the technical field of catalytic oxidation, and discloses a method for catalytic oxidation of carbon monoxide. The invention relates to a carbon monoxide catalytic oxidation method, which comprises: in the presence of a catalytic oxidation catalyst, carrying out a catalytic oxidation reaction on a carbon monoxide-containing reaction raw material and oxygen, the catalytic oxidation catalyst comprises an amino and propyl modified carrier, and the carrier is a manganese oxide and / or a copper-manganese composite oxide. The method can improve the conversion rate and long-period operation stability of carbon monoxide.

The application belongs to the technical field of solid oxide fuel cell anode catalyst, and particularly relates to a preparation of a multi-doped layered perovskite anode and application thereof in ammonia solid oxide fuel cells. x Ba 1–x Mn 1–y TM y O 3–δ (0.4<=x<=0.6, 0<=y<=0.3, TM=Co, Fe, Cu), the precursor is phase changed under a reducing atmosphere to form a PrBaMn2O 5+δ layered perovskite with rich oxygen vacancies, and the doped transition metal is precipitated in the form of an alloy and anchored on the surface of the layered perovskite. The anode catalyst has a simple synthesis method, low cost, rich and flexible adjustable element composition. The obtained anode catalyst is made into a slurry and then assembled into a solid oxide fuel cell single cell sheet. The solid oxide fuel cell prepared by the application has good power output, electrical conductivity and stability at medium and high temperatures.

This invention provides a method for preparing an amphiphilic Janus nanoflotation agent and its application in foam flotation to remove perfluorinated compounds (PFOCs) from water, relating to the technical field of PFOC removal in water. The method for preparing the amphiphilic Janus nanoflotation agent involves grafting hydrophobic and hydrophilic functional groups onto the surface of an SNP (spatial nucleus polymer) to achieve an amphiphilic Janus structure. The introduction of long C-F chains and amino groups respectively yields the hydrophobic and hydrophilic amphiphilic structures, enabling the flotation agent to irreversibly adsorb at the gas-liquid interface and thus exert a highly efficient foam-stabilizing effect. The amphiphilic Janus nanoflotation agent provided by this invention not only generates stable foam during foam flotation but also effectively captures PFCs, thereby achieving the removal of PFOS and PFOA.

The invention relates to the technical field of composite electroplating, in particular to an electroplating method for preparing a high-wear-resistance self-lubricating plating layer, which comprises the following steps: firstly, carrying out pretreatment of oil removal and acid pickling activation on a metal workpiece; then preparing a nano composite nickel plating solution in which a nickel plating basic solution contains a nano particle composite phase subjected to pre-dispersion treatment, and the total concentration of composite particles is 10-60g / L; then the dispersion stability of the nano-composite nickel plating solution is maintained in a circulating filtration and mechanical stirring combined mode, and the pretreated workpiece is electroplated; and finally, after electroplating is completed, the workpiece is cleaned and dried. According to the electroplating process for preparing the nickel-based composite coating with high wear resistance and low friction coefficient, the pulse current is adopted, and the high instantaneous current density and turn-off time of the pulse current are utilized, so that desorption and rearrangement of adsorbed particles are facilitated, uniform embedding of the particles is promoted, nickel matrix crystal grains are refined, and the compactness and comprehensive mechanical properties of the coating are further optimized.

This invention belongs to the field of detection technology, specifically relating to a method for detecting the heavy metal content in food additives. The detection method includes the following steps: (1) sample pretreatment; (2) preparing a series of heavy metal standard solutions of different concentrations, testing their net strength using an ICP-MS instrument, and obtaining a standard working curve; (3) testing the net strength of the sample solution and blank solution using an ICP-MS instrument, and obtaining the concentration of heavy metals in the food additives by combining the standard working curves, and further obtaining the content of heavy metals in the food additives. The detection method of this invention can be used to detect the heavy metal arsenic in compound meat product thickeners. Through enzymatic hydrolysis-assisted extraction and ultrasonic synergistic extraction, gradient ultrasound combined with temperature control is used to further destroy the sample structure and improve the arsenic dissolution efficiency; EDTA and citric acid are used to complex metal ions, and multiple components synergistically reduce the fixation effect of other ions on arsenic. Through synergistic effect, the accuracy of the detection results is improved.

The present application relates to a kind of underground gasification system of gas-containing coal seam and its gasification method, including multiple groups of vertical and interval arrangement U-shaped pipeline, the U-shaped opening of U-shaped pipeline is all upwards, and the bottom of U-shaped pipeline is gasification passage, and multiple through holes are formed screen pipe in gasification passage;First switch valve is arranged and installed in the opening of both ends of U-shaped pipeline, and the same end portion between adjacent two groups of U-shaped pipeline is also all connected by the connecting pipe with second switch valve, the communication position of connecting pipe and U-shaped pipeline is all below first switch valve, and detection tube is communicated on each connecting pipe, both ends of detection tube are communicated with connecting pipe, and the communication position of both ends of detection tube and connecting pipe is on the side of second switch valve, gas composition detection device, gas temperature detection device, exhaust pipe and third switch valve are also sequentially installed on detection tube, fourth switch valve is installed on exhaust pipe, and the present application can realize the efficient underground gasification operation of gas-containing coal seam.

This invention belongs to the field of automotive interior material testing technology and discloses a VOC release detection device for automotive interior materials. The device includes: a rotating support frame; a detection chamber assembly rotatably mounted on the rotating support frame, the detection chamber assembly including a main housing and a sealing cover mechanism, which cooperate to form a sealed detection chamber; and a suspension clamping assembly disposed within the detection chamber for clamping the sheet-like test material and physically dividing the detection chamber into a first chamber and a second chamber. This invention constructs a breathing circulation system through an oil-free pump suction mechanism combined with a bellows buffer mechanism, driving gas to reciprocate through the test material. Combined with a rotating inverted structure, gravity is used to accumulate the excitation medium on the material surface. Under the action of alternating airflow, cyclic excitation of fluidized suspension and compaction contact is generated, thereby effectively destroying the gas boundary layer under microscopic hammering and friction, significantly improving the deep VOC desorption rate and detection accuracy.

A method for strengthening methane in-situ combustion fracturing, liquid carbon dioxide is pressurized and heated to form supercritical carbon dioxide, which is then sent into the fracturing channel to form a complex fracture network around the fracturing channel; mixed fracturing fluid formed by mixing supercritical carbon dioxide and fly ash is injected into the well bottom; combustion-supporting agent is injected into the wellbore and mixed with the mixed fracturing fluid at the well bottom to enter the complex fracture network together, so that a multiphase mixed fluid is formed in the complex fracture network; the annulus valve is closed to promote mineralization reaction of supercritical carbon dioxide and fly ash under the temperature and pressure conditions of the reservoir, and to form high-strength minerals; the mineralization reaction is used to promote the desorption of methane in the reservoir and into the complex fracture network, so that methane-combustion-supporting agent mixed gas is formed in the complex fracture network; the combustion process is used to promote the dust cloud formed by the mixing of fly ash and gas in the complex fracture network, to strengthen the effect of methane in-situ combustion; and the fracturing reconstruction of all layers is completed. The fracturing effect of the method is ideal.

The application discloses a preparation method of a dehydrogenation catalyst carrier. Pseudo-boehmite, esculin gum and alkali metal salt are mixed and then added into water to form a suspension, an acid solution is used to perform sol treatment on the suspension to obtain a sol solution, a gelling agent is added into the sol solution and then placed on a dispersion drop head above an oil column to perform oil column molding, and after aging, washing with water, drying and roasting, alumina small balls are obtained; wherein the pseudo-boehmite is composed of pseudo-boehmite A and pseudo-boehmite B with a mass ratio of 1: (0.1-10), the pore volume of the pseudo-boehmite A is 0.1-0.3 mL / g, and the pore volume of the pseudo-boehmite B is 1.0-2.0 mL / g. Meanwhile, the application also discloses application of the dehydrogenation catalyst carrier in a dehydrogenation catalyst and dehydrogenation application of the dehydrogenation catalyst. The prepared carrier makes the service life of the dehydrogenation catalyst better and the catalyst activity better.

The application discloses a closed-loop extraction and isotope tracing method for hot flue gas displacement of coal bed methane, which comprises the following steps: first, using CH4 combustion and explosion fracturing technology to form a crack network in the in-situ coal seam by synergistic combustion and explosion reaction impact fracturing; then, injecting hot flue gas into the combustion and explosion fractured coal seam; the hot flue gas can promote the desorption of CH4 gas in the coal body due to its high temperature; the CO2, SO2 and NO2 in the hot flue gas can replace a large amount of CH4 gas adsorbed in the in-situ coal seam due to the competitive adsorption advantage; the extracted CH4 and hot flue gas can be continuously used in a closed loop; the hot flue gas storage is realized, and the coal bed methane extraction efficiency is improved; in addition, the combustion and explosion gas and the hot flue gas are marked by specific isotopes, and the migration characteristics and interaction of the combustion and explosion gas, the hot flue gas and the extracted CH4 gas in the target deep coal seam can be analyzed and reversed; therefore, the injection parameters of the combustion and explosion gas and the hot flue gas can be dynamically regulated and controlled, and the hot flue gas storage and CH4 extraction efficiency of the deep in-situ coal seam are maximized.

The present application relates to geothermal water treatment technical field, disclose a kind of geothermal water water gas separation device, including tank body, tank cover being located at the top of tank body, inlet being located at the top of tank body, drain outlet being located at the bottom of tank body and exhaust port being located at the top of tank cover, further including multistage water collecting assembly being located in the middle of the inner cavity of tank body and resonance separation assembly being located in the inner cavity of tank body;Multistage water collecting assembly includes three groups of arc water collecting pipes being spaced apart along the axial direction of tank body and spiral water injection pipe being communicated with inlet;Resonance separation assembly includes umbrella-shaped water catcher being fixedly installed in tank cover, vertical rod being fixedly connected in the center of umbrella-shaped water catcher and extending downward, and three groups of floating units being arranged on vertical rod;The present application is provided with floating unit, so that conical screen disc produces continuous vibration when fluid impact, and the vibration forms shear force and local disturbance in fluid, which can break the stable state of micro-bubbles in water body, promote its desorption and collision coalescence.

The application discloses a kind of adsorption tower adsorbate quick desorption and regeneration device, it is related to adsorbate desorption and regeneration technical field;Specifically including bottom plate, the outer wall of the top of bottom plate is fixed with pedestal by bolt, and the outer wall of the top of pedestal is respectively fixed with fixed seat one and fixed seat two by bolt, and the side of fixed seat one is provided with mounting hole, vertically attached mechanism is arranged in mounting hole, the lifting end of vertically attached mechanism is rotatably connected with attached plate, and attached plate and guide strip form sliding fit, the outer wall of both sides of fixed seat one is fixedly connected with slide strip, slide strip side is slidably connected with sliding block, and sliding block is integrally formed with attached plate, the outer wall of the top of pedestal is provided with positioning mechanism, and adsorbent is clamped between two positioning mechanisms.The distance between high-low adjusting heating plate and adsorbent is adjusted, more uniform heat conduction is realized, the phenomenon of local overheating or overcooling is avoided, so as to improve desorption efficiency.

The application discloses a variable-flow type purification device of a hydrogen purification adsorption tower and belongs to the technical field of hydrogen purification. The variable-flow type purification device of the hydrogen purification adsorption tower comprises a tower body, vacuum extraction pipes and gas inlet pipes are connected to the lower outer side of the tower body, an exhaust pipe is connected to the top of the tower body, first and second positioning screens are fixedly arranged on the inner side of the tower body, a fixing seat is fixedly installed on the upper inner side of the tower body, an elastic lifting connection is formed between the upper part of the fixing seat and a movable seat, a sealing plate is also fixedly installed on the upper inner side of the tower body, a rubber cylinder body for adjusting air pressure is fixedly connected between the movable seat and the sealing plate, and a flushing pipe is connected to the outer side of the upper part of the tower body. The variable-flow type purification device of the hydrogen purification adsorption tower can realize real-time regulation and control of the gas flow rate according to the purity of hydrogen purification, ensures the purification efficiency and the purity, and can realize efficient desorption in a combined manner, so that effective adsorption and purification of the adsorption tower are ensured.

This invention relates to the field of coal seam permeability enhancement technology, and discloses a method and apparatus for multiple fracturing of low-permeability coal seams using a combination of electrical pulses and supersaturated ammonium carbonate solution. The method includes: Step 1, drilling a single-hole long borehole in the coal seam, and then arranging an integrated discharge device within the borehole; Step 2, injecting a high-pressure supersaturated ammonium carbonate ion solution into the borehole, using a data monitoring and control center system to monitor the data within the borehole and control the integrated discharge device to release electrical pulses into the high-temperature, high-pressure conductive medium filling the borehole, thereby fracturing the coal seam and releasing gas; Step 3, after the electrical pulses are repeated 6-8 times, the discharge is stopped, the electrolyte solution is drained, and the integrated discharge device is removed. The single-hole long borehole is then connected to a gas extraction pipeline for gas extraction. This invention is safe, highly efficient, and has wider applicability, possessing urgent practical significance and important technical value.

The application discloses a bifunctional electrocatalyst of N and P co-doped porous carbon nanosheet loaded FeCo hollow nanospheres and a preparation method and application thereof. The preparation method is as follows: nitrogen-doped carbon materials are prepared through grinding and mixing and high-temperature pyrolysis. Pluronic F-127, the nitrogen-doped carbon materials, iron nitrate, cobalt nitrate, melamine and o-phenylenediamine are added into an ethanol solution to be mixed, ultrasonically treated and stirred, and after reaction, the solution is evaporated, high-temperature pyrolysis and sodium hypophosphite phosphorization are carried out, and finally the bifunctional electrocatalyst of N and P co-doped porous carbon nanosheet loaded FeCo hollow nanospheres is obtained. The catalyst can exhibit excellent catalytic activity in electrocatalytic oxygen reduction reaction and oxygen evolution reaction, and can be applied in a liquid zinc-air battery.

The present invention relates to an exhaust aftertreatment device for an internal combustion engine (1), having an exhaust pipe configured to deliver exhaust gas blown from the internal combustion engine (1) to at least one component for exhaust aftertreatment, wherein at least an adsorber (3) for temporarily storing hydrocarbons contained in the exhaust gas, a catalytic converter (5) for catalytic aftertreatment of the exhaust gas, an electrically heated catalytic converter (4), and a cracking catalytic converter (2) for cracking long-chain hydrocarbons into short-chain hydrocarbons are arranged in the exhaust pipe.

The application discloses a treatment method for oil-containing copper scrap oil removal and oxidation prevention, and belongs to the technical field of resource treatment of oil-containing metal solid waste, and comprises the following steps: mixing the oil-containing copper scrap and an organic solvent at 180-200 DEG C and under inert atmosphere to obtain a solvent-copper scrap mixed solution, wherein the organic solvent used can generate reducing hydrogen in the mixing process; and distilling the solvent-copper scrap mixed solution under the conditions of inert atmosphere and a vacuum degree of less than or equal to 10 kPa to obtain solid copper scrap. The treatment method utilizes the full effect of the organic solvent on the copper-oil interface under heating and inert pressurized atmosphere, passivates fatty acids and pyrolysis intermediates, so that the oil-containing copper scrap containing synthetic oil can be efficiently deoiled, and the oxidation of the copper scrap can be inhibited.

This invention relates to the field of fuel cell technology, specifically to an online variable-load recovery method for marine fuel cells after salt spray contamination. The method includes the following steps: with the fuel cell to be recovered online, testing the polarization curve after contamination as a performance benchmark; stabilizing the fuel cell temperature within a preset operating temperature range, introducing hydrogen gas into the anode and clean compressed air free of salt spray contaminants into the cathode, with additional humidification of the cathode intake air; controlling the fuel cell to perform cyclic variable-load operation within a high current density range; after the cyclic variable-load operation ends, switching to the benchmark operating conditions and testing the recovered polarization curve; comparing the polarization curves before and after recovery, calculating the voltage recovery rate, and quantitatively evaluating the recovery effect. This invention enables online performance recovery after salt spray contamination without disassembling the fuel cell stack, with significant recovery effects. It establishes a standardized programmable recovery process and quantitative evaluation method, effectively extending the service life of the fuel cell.

The application provides a heating and cleaning method for low-grade scheelite rough concentrate, which comprises the following steps: concentrating the scheelite rough concentrate to 50-70wt%, pumping it into a stirring barrel and inputting steam for heating; heating the scheelite rough concentrate to 85-95 DEG C, adding sodium hydroxide, water glass and molecular sieve activated powder in sequence under stirring condition, continuing to heat and stir for 25-45 min, and removing the collector on the surface of calcium-containing gangue minerals; after the removing process is completed, adding normal-temperature water to dilute the scheelite rough concentrate to 20-30wt% and then feeding it into a flotation system, and obtaining scheelite concentrate through one-time roughing, two-time cleaning and three-time scavenging processes; wherein the roughing and cleaning processes adopt a flotation column, and the scavenging process adopts an aerated agitation type flotation machine. The heating and cleaning method for low-grade scheelite rough concentrate provided by the application can ensure the grade of the scheelite concentrate, can take into account the recovery rate of the scheelite ore, and can reduce the production cost.

The application relates to a catalyst for preparing 2,5-dihydroxymethyl tetrahydrofuran and a preparation method and application thereof, which comprises the following steps: (1) preparing a ruthenium salt solution, a nickel salt solution, mixing the two solutions with 1-ethyl-3-methyl imidazole chloride (Etmim)Cl in an acid solution, and carrying out ultrasonic treatment to obtain [Etmim]RuNiCl6; (2) under stirring, the [Etmim]RuNiCl6 is added dropwise into carbon nanotubes (CNTs), and after mixing, aging and drying, a catalyst is prepared. The catalyst is used for preparing 2,5-dihydroxymethyl tetrahydrofuran from 5-hydroxymethyl furfural, and has the advantages of high raw material conversion rate, high selectivity of target product and good stability of the catalyst.

The invention discloses a device for promoting methylcyclohexane dehydrogenation at low temperature under the assistance of an electric field, a catalyst and a preparation method thereof, and belongs to the crossing field of catalytic chemistry, hydrogen energy technology and reaction engineering. The device is composed of a gas supply system, an electric field assisted methyl cyclohexane dehydrogenation system and a product gas analysis system which are connected through a gas pipeline. The catalyst is obtained by mechanically mixing silicon carbide powder and a platinum-loaded metal oxide modified alumina carrier, tabletting and molding, crushing and screening. The catalyst is arranged in the quartz reaction tube and is connected with the high-voltage power supply through the positive electrode and the negative electrode, and the quartz reaction tube is arranged in the high-temperature reaction furnace; by introducing an external electric field, apparent activation energy of methyl cyclohexane dehydrogenation can be remarkably reduced through a Joule heating effect and a surface electron effect, and energy consumption is greatly reduced; according to the method, hydrogen production through decomposition of methyl cyclohexane can be achieved at low temperature, operation is remarkably reduced, the operation cost is remarkably reduced, and an innovative solution is provided for achieving green hydrogen energy economy.