164 results about "Competitive adsorption" patented technology

The invention discloses a preparation method and application of a hydrophobic core-shell structure catalyst, and the method comprises the following steps: adding a metal oxide and a surfactant into a first solvent to obtain a first dispersion liquid; adding an alkaline solution and a silicon source into the first dispersion liquid to obtain a first turbid liquid; calcining the first turbid liquid to obtain a porous core-shell material of silicon dioxide coated metal oxide; adding the porous core-shell material into a third solvent to obtain a second suspension; and adding an alkaline solution and a silane agent into the second turbid liquid to obtain the hydrophobic core-shell structure catalyst of the hydrophobic silicon dioxide coated metal oxide. The oxidation reaction of the inner core of the silicon dioxide layer does not destroy hydrophobic groups on the outer layer, so that the hydrophobic performance is maintained for a long time, organosilane is grafted on the surface of the silicon dioxide shell layer, inhibition of water vapor on the activity of the catalyst is reduced, and competitive adsorption of water vapor and reaction gas is prevented; the activity and the service life of the catalyst under high-temperature and high-humidity conditions are effectively improved.

The invention relates to the field of coal seam anti-reflection, and particularly discloses a coal seam carbon dioxide and static expanding agent synergistic anti-reflection system and method. Slurry prepared by mixing a static expanding agent and water is injected into the expansion fracturing drill hole, in the process that the static expanding agent is subjected to hydration reaction and generates expansion stress, carbon dioxide gas is injected into the expansion fracturing drill hole through the carbon dioxide gas injection pipe, carbon dioxide and the hydration product of the static expanding agent are subjected to carbonization reaction to generate larger expansion stress, and the expansion fracturing drill hole is formed. Expanding the coal body fractures to form expansion fractures; the carbon dioxide is driven by differential pressure to seep into a coal matrix along expansion fractures, and adsorbed gas is driven to be desorbed into a free state through a competitive adsorption effect; and under the combined action of extraction negative pressure and carbon dioxide displacement, the free-state gas moves from the fracture channel to the extraction drill hole, and extraction is conducted through the gas extraction system. Carbon dioxide and the static expanding agent cooperate to improve permeability of the coal body, the displacement effect of carbon dioxide on gas is promoted, and the gas extraction effect is improved.

The invention relates to a shale or coal rock gas evaluation method based on a gas-water two-phase flow isotope fractionation model. The shale or coal rock gas evaluation method comprises the following steps: 1, collecting data; 2, establishing a gas well model; 3, establishing a control equation set; 4, coupling the influence of the real gas effect and the effective stress; 5, establishing a gas transmission model and a relative permeability model; 6, establishing a relation between capillary pressure and saturation; 7, considering critical desorption pressure; 8, setting boundary conditions of initial conditions; 9, solving a control equation set; 10, calculating production dynamic parameters and isotope values; 11, performing history fitting; 12, verifying historical fitting quality; 13, predicting productivity; 14, calculating a gas dynamic output proportion; 15, identifying a fractionation inflection point and gas production mechanism conversion; by coupling gas-water two-phase flow, multiple gas transmission mechanisms, stress sensitivity and methane isotope competitive adsorption theories, yield prediction of the deep reservoir and quantitative evaluation of the dynamic proportion of produced gas are realized.

The invention discloses a preparation method of a solid-state electrolyte based on chemical bonding of a silane coupling agent and a sulfide solid-state electrolyte and a preparation method of a solid-state lithium battery. A halogen ion competitive adsorption effect of a first electrolyte is cooperated with a compact siloxane network formed by the silane coupling agent; the sulfide solid electrolyte is effectively inhibited from reacting with moisture in air, electrochemical performance attenuation is delayed, the first electrolyte reacts with lithium metal to generate a stable SEI layer to inhibit dendritic crystal growth, and a wide electrochemical stable window of the second electrolyte can reduce oxygenolysis reaction with a high-voltage positive electrode, so that the electrochemical performance is improved. Chemical bonding is formed between amino groups of the silane coupling agent and lithium metal, interface contact is optimized, meanwhile, the interface ion transfer efficiency is improved through the high ionic conductivity of the second electrolyte, and the interface impedance is reduced; the defects of poor ionic conductivity and poor service life caused by poor air stability and electrochemical stability of the electrolyte in the prior art are overcome.

The invention discloses an active treatment method for multi-source residual coal gas of a waste mine, which comprises the following steps: firstly, hydraulic fracturing pressure relief permeability improvement and overlying strata separation layer grouting reinforcement are cooperated, the hydraulic fracturing pressure relief permeability improvement establishes a netted fracture network in a coal body to realize permeability improvement, and the overlying strata separation layer grouting reinforcement compacts goaf gangue through grouting and reinforces an overlying strata to form a continuous bearing consolidation body; and therefore, a pressure relief and permeability increasing-strengthening and reinforcing integrated structure is formed, a stable structure and a penetrating seepage network are provided for subsequent displacement and gas extraction, and the subsequent gas extraction efficiency is guaranteed. Then low-temperature liquid CO2 is injected into the coal seam through the injection well, gas displacement and desorption are conducted on gas adsorbed in the coal seam under the action of phase change and competitive adsorption, expansion and development are conducted on fractures to enable permeability to be secondarily enhanced, and meanwhile part of CO2 obtained after displacement is retained and sealed in a coal body and a goaf; on the premise that the gas extraction concentration and efficiency are effectively improved, CO2 can be stored, and the dual effects of resource utilization and carbon storage are achieved.

The invention discloses a method for screening an MOFs material with excellent CH4 adsorption separation performance based on high-throughput calculation, a method for improving the screening efficiency and a preparation method. The screening method comprises the following steps: constructing a screening database of MOFs material structure information; calculating physical and chemical characteristic parameters by utilizing computational chemistry and material simulation software, and further setting a screening standard aiming at CH4 adsorption; carrying out preliminary screening through a high-throughput screening technology; predicting the competitive adsorption behavior of the primarily selected material in the mixed gas by means of a molecular simulation technology, and performing secondary screening; and finally, determining the final MOFs material in combination with an actual application environment. According to the method, the high-performance MOFs material is rapidly and accurately screened out from a large number of materials, the research and development period is effectively shortened, the development cost is reduced, an efficient and feasible solution is provided for resource utilization of ultralow-concentration CH4 in coal mine windblown gas, and energy utilization and environmental protection are assisted.

The invention relates to the technical field of adsorption devices, in particular to a saturated carbon dioxide competitive adsorption device which comprises a shell, two plugging rods are inserted into the shell, a monitoring cavity is formed in the middle of the shell, the ends of the plugging rods are both inserted into the monitoring cavity, the ends of the two plugging rods are jointly sleeved with a heat shrink tube, and the heat shrink tube is connected with the shell. The heat shrink tube is filled with a rock core sample, an annular groove is formed in the surface of the plugging rod, the sealing ring is fixedly arranged in the annular groove in a sleeving manner, and the sealing ring is located between the heat shrink tube and the plugging rod; the gas in the gas storage space is pushed into the sealing ring through the pipeline, so that the sealing ring expands, the contact pressure between the sealing ring and the heat shrink tube is improved, the sealing effect between the heat shrink tube and the plugging rod is improved from the inner side, the situation of experimental gas leakage is avoided, and the accuracy of an experimental result is guaranteed.

The invention discloses a filler ratio optimization modeling method for removing tire particle dissolved substances in a rainwater system, and the method comprises the steps: carrying out the structural processing of obtained parameters, and constructing a structural parameter set; calling a mechanism library and a medium fingerprint library, processing data by adopting a mechanism constraint neural network (PINN), and generating a multi-component dissolution spectrum; the method comprises the following steps: describing migration and removal processes of pollutants in a packed bed layer through a one-dimensional convection-dispersion-reaction bed layer model, treating a competitive effect among the pollutants by adopting a multi-component competitive adsorption model, and outputting a dynamic penetration curve, a removal rate and pressure drop data of the pollutants; then carrying out multi-objective optimization and robustness analysis to obtain an optimal filler combination structure and operating parameters; and finally, outputting and visualizing a result. According to the method, the multi-component competition effect can be accurately quantified, filler proportion optimization modeling is carried out on the basis, the limitation of the prior art can be overcome, and the reliability, economical efficiency and environmental safety of treatment facility design are improved.

The invention discloses a zero-carbon method for strengthening coal seam gas recovery and CO2 storage by using flue gas residual heat in the technical field of residual heat utilization, gas extraction and carbon emission reduction. The zero-carbon method comprises the following steps: step 1, collecting high-temperature flue gas in a power plant; step 2, performing high-temperature CO2 concentration-compression; step 3, reservoir evaluation and area selection; 4, designing and constructing a horizontal well; 5, high-temperature CO2 injection and joint control energy increasing are conducted, specifically, high-temperature CO2 is injected into a preset section through a pump, the injection pressure and the injection speed are adjusted through the joint control energy increasing technology, and the diffusion range and the diffusion speed of CO2 are controlled; 4, gas recovery and CO2 storage: high-temperature CO2 is used for providing energy to promote gas desorption on one hand, and the high-temperature CO2 and CH4 in the adsorption state are subjected to competitive adsorption on the other hand. The method is simple and easy to operate, the coal seam gas partial pressure is reduced through CO2 injection, the recovery efficiency is improved, CO2 can be adsorbed by a coal seam and stored in a reservoir, and geological storage of CO2 is achieved.

Provided is a waste gas treatment device including a waste gas inlet configured to introduce waste gas discharged from a semiconductor processing chamber and an adsorption unit configured to adsorb competitive adsorption gas from the waste gas flowing from the waste gas inlet, and configured to adsorb xenon (Xe) from the waste gas from which the competitive adsorption gas has been removed, and recover the adsorbed xenon. Also provided are waste gas treatment methods, and waste gas adsorption and recovery systems including the present waste gas treatment devices.

The invention discloses a molecular simulation-based method for estimating CO2 / CH4 adsorption capacity in a shale reservoir, which comprises the following steps of: firstly, selecting different mineral components from the shale reservoir, and determining reservoir temperature and pressure corresponding to each mineral component; the method comprises the following steps: constructing molecular models of different mineral components in a shale reservoir and a to-be-detected gas molecular model by using molecular simulation software, and carrying out geometric optimization; setting temperature and pressure conditions conforming to the actual reservoir in the simulation environment, and introducing gas molecules to perform molecular dynamics simulation so as to research the competitive adsorption behavior and obtain adsorption quantity data; based on simulation data, an adsorption capacity calculation expression comprehensively considering the coupling influence of multiple factors such as temperature and pressure is established, and the actual shale reservoir gas adsorption capacity is rapidly and accurately estimated. Through molecular simulation, the limitation that a traditional experiment is long in period, high in cost and difficult to separate multi-factor influences is overcome, and an efficient and reliable theoretical tool is provided for shale gas reserve prediction and carbon dioxide geological storage benefit evaluation.

This invention discloses a pretreatment method for detecting trace perfluorinated and polyfluoroalkyl substances (PFAS) in complex matrix textiles, belonging to the field of materials analysis technology. The method involves placing the textile in an alkaline solvent containing an alkyl sulfonate displacing agent. Under heating conditions, the displacing agent utilizes its competitive adsorption mechanism to forcibly occupy matrix adsorption sites and displace the target analytes into the solvent. Subsequently, the temperature is rapidly lowered to the phase separation induction temperature, inducing supersaturation precipitation of the displacing agent, which then encapsulates impurities in situ and co-precipitates, forming a solid-liquid stratified system. Finally, the supernatant is collected for analysis. This invention utilizes the dual properties of the displacing agent—high-temperature solubilization and low-temperature phase change removal—to effectively break the strong adsorption equilibrium of aged textiles without using a solid-phase extraction column. This solves the contradiction between low extraction rate and significant matrix interference, significantly improving the recovery rate of PFAS. It offers advantages such as low cost, simple operation, and high accuracy.

The invention belongs to the related technical field of extraction, and discloses a white tea aroma substance extraction method based on an ultrasonic technology, ultrasonic-assisted invasive extraction is introduced, the treatment time is shortened, the loss of heat-sensitive components is further reduced, a solid micro-extraction technology does not need a large amount of organic solvents, the sample pretreatment step is simplified, and the extraction efficiency is improved. A traditional SPME fiber is modified, and an MIPs pattern layer capable of absorbing white tea aroma substances is added, so that the adsorption capacity on target substances is enhanced, competitive adsorption of non-target substances is effectively reduced, and the detection sensitivity of target aroma components is improved.

The invention discloses a hydrophobic Zr-doped SiO2 (at) APTES-T composite aerogel desulfurization adsorbent as well as a preparation method and application of the hydrophobic Zr-doped SiO2 (at) APTES-T composite aerogel desulfurization adsorbent. The preparation method comprises the following specific steps: dissolving thiophene in n-heptane to form a non-polar template solution, and adding the non-polar template solution into a polar mixed solution of ZrOCl2, methyltriethoxysilane and 3-aminopropyltriethoxysilane, wherein water and ethanol serve as solvents of the ZrOCl2, the methyltriethoxysilane and the 3-aminopropyltriethoxysilane; the non-polar template solution is stirred in the polar solution to form uniform tiny liquid drops. The preparation method comprises the following steps: carrying out a hydrolysis-polymerization reaction on a mixed solution to form hydrophobic Zr-doped SiO2 (at) APTES-T alcogel, carrying out aging, replacement and drying steps to obtain the hydrophobic Zr-doped SiO2 (at) APTES-T composite aerogel desulfurization adsorbent, and applying the hydrophobic Zr-doped SiO2 (at) APTES-T composite aerogel desulfurization adsorbent to adsorption removal of thiophene compounds in simulated aromatic hydrocarbons. Results show that the desulfurization adsorbent disclosed by the invention has good adsorption performance on thiophene sulfides in aromatic hydrocarbons, has excellent performance of resisting competitive adsorption of polar impurities, and has good application prospects in the field of deep desulfurization.

The application provides a kind of test device and method of gas-liquid competitive adsorption under the simulation reservoir electric field environment, it is related to oil and gas field development experimental simulation technical field, the device includes QCM-D host computer, special electric field flow cavity, high voltage power supply, fluid injection system and signal isolation and shielding system;The method comprises: establishing baseline, monitoring crude oil adsorption kinetics, under the application of high voltage electric field, monitoring displacement gas competitive desorption kinetics, and generating evaluation results based on frequency and dissipation dual parameter changes.The application realizes real-time, in-situ, quantitative monitoring of gas-liquid competitive adsorption microprocess on the surface of QCM-D chip under the environment of kilovolt high voltage electric field for the first time through vertical transmission type non-contact electric field loading cavity and high voltage-weak signal isolation circuit, and can distinguish the different effects of electric field on mass desorption and interface rheological change, providing a reliable experimental tool and analysis method for revealing the micro mechanism of electric field enhanced oil displacement.

The present application relates to the technical field of gas adsorption, and particularly provides a two-component gas competitive adsorption isotherm splitting method, aiming to solve the problem of high cost caused by mass flow meter + mass spectrometer or chromatography in the existing two-component gas competitive adsorption isotherm splitting. To this end, the two-component gas competitive adsorption isotherm splitting method comprises: controlling a weighing device to obtain the weight change of a sample after adsorption and the weight change of a sinker; obtaining the mass density of the mixed gas after adsorption based on the weight change; then obtaining the amount of substance of each of the mixed gas after adsorption; obtaining the residual amount of substance of each of the mixed gas after adsorption based on the amount of substance of the mixed gas after adsorption and the proportion of the amount of substance of each of the two-component gas after adsorption; further obtaining the proportion of the amount of adsorbed substance of each; and finally obtaining the adsorption mass of each based on the proportion of the amount of adsorbed substance of each of the two-component gas and the weight change Δm0 of the sample before and after adsorption.

The invention provides a system and a method for measuring the competitive adsorption capacity of binary gas. The measuring system comprises a quantitative gas distribution system and a high-pressure adsorption instrument, the quantitative gas distribution system comprises gas distribution equipment, a gas cylinder, a high-pressure adsorption instrument, a gas inlet pipe, a balance and control equipment, one end of the gas distribution equipment is connected with the gas cylinder, the other end of the gas distribution equipment is connected with one end of the gas inlet pipe, the other end of the gas inlet pipe is connected with the high-pressure adsorption instrument, and the balance is arranged at the upper end of the high-pressure adsorption instrument; and the control equipment is connected with the gas distribution equipment and the high-pressure adsorption instrument. The technical problems that in the prior art, a gas sample needs to be taken for component analysis, and gas composition and balance pressure of an experiment system are affected can be solved, the technical problems that in the prior art, a chromatographic instrument is relied on, an experiment device is complex, and operation is tedious can be solved, and the gas density can be directly calculated so that the gas component proportion can be calculated; the experiment disturbance is avoided; only a high-pressure adsorption instrument is used, and chromatographic analysis is not needed.

The application discloses a preparation method of a hydrocracking catalyst, and comprises the following steps: (1) a mixed solution and an alkaline precipitant are dropwise added into a solution containing a Ni component in parallel flow to perform a coprecipitation reaction, and slurry M is obtained; wherein the mixed solution is a mixed solution of sodium tungstate, sodium molybdate and sodium metaaluminate; (2) the slurry M is divided into two parts, i.e., slurry M-1 and slurry M-2, and the two parts are separately subjected to aging, and the two aging products are mixed to obtain slurry N; (3) the slurry N is subjected to vacuum filtration, and the obtained filter cake is subjected to two times of health maintenance; (4) the filter cake is subjected to drying treatment, and then is mixed and kneaded with a molecular sieve and a molding aid, and then is subjected to extrusion and molding to obtain a molded product, and the molded product is subjected to calcination treatment to obtain the hydrocracking catalyst. The hydrocracking catalyst with a bimodal pore structure is obtained through aging and gelation by means of pH value swing in batches, the problem that small molecule aromatic hydrocarbons are at a disadvantage in competitive adsorption and reaction processes is solved, the aromatic hydrocarbon removal efficiency is improved, and the hydrocracking catalyst is suitable for a hydrocracking process for producing industrial 5# white oil.

The invention discloses an ammonia carbamate pyrolysis coupling carbon capture device which comprises a tower body, and the tower body comprises a gas inlet section, a pyrolysis section, a capture section and an exhaust section which are sequentially arranged from bottom to top. Carbon dioxide in pyrolysis gas is separated, so that competitive adsorption of carbon dioxide on the surface of a catalyst in the SCR denitration system is reduced, and the efficiency of the SCR denitration system is improved. And meanwhile, a high-temperature condition required in the traditional process of preparing ammonia from urea is avoided, so that the energy consumption cost of a denitration system is reduced. In addition, the problem that the ammonium carbamate is easy to cake in a low-temperature and high-humidity environment or a severe-temperature-fluctuation environment due to the fact that the temperature is close to or exceeds 25 DEG C in the denitration process is effectively avoided, and the risks of pipeline blockage and difficult decomposition are reduced. Compared with urea ammonia preparation, the ammonia preparation efficiency is improved by 5.0%-24.8% and averagely improved by 14.9%, the ammonia preparation energy consumption is reduced by 35%-40.6%, and meanwhile, the denitration efficiency of the generated mixed gas entering the flue gas selective catalytic denitration reactor can be improved by 2.5%-3.2%.

The invention relates to the technical field of metal extraction, in particular to a process for extracting magnesium from taupe salt lake clay containing magnesium in multiple occurrence states. A technology for extracting magnesium from taupe salt lake clay containing multi-occurrence-state magnesium is characterized by comprising the following steps that the salt lake clay is crushed and sieved, then fine particles are soaked in a leaching agent, and leaching liquid containing the magnesium element is obtained through filtering; wherein the leaching agent is prepared from concentrated hydrochloric acid, concentrated sulfuric acid and low-salinity water, and the volume ratio of the concentrated hydrochloric acid to the concentrated sulfuric acid to the low-salinity water is (0.05-0.15): (0.05-0.15): 0.8; the low-salinity water is natural water of the horse-sea basin. According to the method, the low-salinity water and the mixed acid (sulfuric acid and hydrochloric acid) are adopted to prepare the composite extracting agent, the efficient leaching rate is achieved through the multiple cooperation mechanisms of Cl <-> competitive adsorption replacement, sulfate radical complexing dissolution and the ultrasonic cavitation effect, the leaching capacity is greatly improved compared with a single water body technology, and meanwhile acid wastewater discharge is reduced.

The invention belongs to the field of mineral processing, and discloses application of an organic inhibitor applicable under neutral to alkaline conditions in a spodumene ore flotation process, and the organic inhibitor comprises at least one of a polycarboxylic acid high-performance water reducing agent, a sulfamate high-efficiency water reducing agent, a melamine resin high-efficiency water reducing agent and a ketoaldehyde condensate high-efficiency water reducing agent. The invention further discloses a flotation process of spodumene ore. The invention finds and verifies that at least one of PCE, ASF, SMF and SAF can be used as an efficient spodumene flotation organic inhibitor for the first time and belongs to a macromolecular organic inhibitor, and the macromolecular organic inhibitor has differentiated competitive adsorption capacity on the surfaces of spodumene and gangue minerals (feldspar and quartz); the method has the double advantages of enhanced separation in a high-alkali system and efficient flotation in a neutral system. A brand-new and non-traditional inhibitor selection is provided for separation of spodumene and gangue minerals, and the technical limitation of dependence on traditional inhibitors such as sodium carbonate for a long time is broken through.

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 invention discloses a method for testing competitive adsorption performance of porous carbon in a high-humidity environment. The method comprises the following steps: performing quantitative characterization on AC to obtain physical parameters of the AC; preparing modified porous carbon; the method comprises the following steps: constructing an atomic-scale model based on physical parameters of AC and XPS functional group data of the AC, and generating structural stereoscopic models of the AC and AC-MA through Materials Studio software; performing GCMC simulation, calculating an adsorption isotherm, adsorption energy and a radial distribution function, and analyzing a radial distribution function curve to research the interaction among porous carbon atoms; an experiment verifies that the prepared AC-MA is subjected to a fixed bed adsorption test, a penetration curve is detected through GC, the simulated adsorption amount and the actually measured adsorption amount are compared, and a required error lt is obtained; 5%; and finally performing performance evaluation. According to the method, the screening period is shortened from 2 weeks to 5 hours, and the design efficiency of a modification scheme is improved by 3 times; the alkyl chain can improve the performance through hydrophobic effect and enhanced toluene adsorption.

The invention discloses a high-entropy oxide catalyst as well as a preparation method and application thereof, belongs to the technical field of catalytic materials, and solves the problems that in the prior art, a noble metal catalyst is large in dosage and high in cost, and a multi-element catalyst is easy to generate component segregation, destroys a high-entropy effect and influences the service life of the catalyst under synthesis and high-temperature reaction conditions; in a complex tail gas environment, CO, HC and NOx have competitive adsorption on the surface of the catalyst, and synchronous and efficient removal of all pollutants is difficult to realize by a single active site of a traditional catalyst. The method comprises the following steps: mixing noble metal, rare earth metal, more than two 3d transition metals and a refractory metal salt solution selected from IVB, VB or VIB groups with a complexing agent, stirring, evaporating and calcining to obtain the high-entropy oxide catalyst with a spinel structure. The catalyst has the advantages of being low in precious metal consumption, high in multi-pollutant synergistic catalysis efficiency, excellent in thermal stability and high in structural stability.

The invention discloses a method and a system for predicting competitive adsorption saturation of multiple pollutants on activated carbon. The method comprises the following steps: inputting basic parameters and Langmuir adsorption parameters of an activated carbon adsorption box; calculating a dominant aperture correction coefficient of each pollutant according to the dominant aperture volume and the common aperture volume of each pollutant, introducing the dominant aperture correction coefficient into a Langmuir competitive adsorption model, and establishing a correction competitive adsorption model; dispersing an activated carbon adsorption box into grid units, calling a correction competitive adsorption model, performing iterative calculation on a time sequence according to the inlet concentration of each pollutant, Langmuir adsorption parameters and related parameters of an adsorbent, calculating the adsorption phase concentration and the adsorbate concentration of the position of each grid unit at different time, and calculating the adsorption phase concentration and the adsorbate concentration of the position of each grid unit; the three-dimensional distribution of the saturation degree of the activated carbon along with time is obtained. According to the invention, the spatial distribution prediction and evaluation of the saturation condition of adsorbing various pollutants in the activated carbon adsorption device at the same time can be realized.

The present application relates to the technical field of mine water treatment, and particularly relates to a mine water treatment agent proportioning intelligent recommendation method based on multi-objective optimization, comprising: collecting mine water treatment multi-dimensional dynamic data and preprocessing to obtain standardized engineering benchmark data sequences; constructing a heavy metal and suspended matter competitive adsorption index and a flocculation body hydraulic shear vulnerability index according to the standardized engineering benchmark data sequences; fusing the standardized engineering benchmark data sequences with the heavy metal and suspended matter competitive adsorption index and the flocculation body hydraulic shear vulnerability index, and predicting future water outflow turbidity by using a classification enhanced gradient boosting tree prediction algorithm; constructing a fitness objective function according to the future water outflow turbidity combined with engineering penalty constraints, and optimizing by using a multi-objective particle swarm optimization algorithm. Through the technical scheme of the present application, the solidity of the flocculation body microstructure can be ensured under harsh working conditions, and invalid consumption of the agent can be avoided.

The invention discloses an ammonia carbamate pyrolysis coupling carbon capture device which comprises a tower body, a discharging pipe and an exhaust pipe. According to the invention, the carbon dioxide in the pyrolysis gas is separated, and only the reducing agent ammonia gas is allowed to be directly used in the selective catalytic reduction (SCR) denitration process, so that the competitive adsorption of the carbon dioxide on the surface of a catalyst in the SCR denitration system is reduced, and the efficiency of the SCR denitration system is improved. And meanwhile, a high-temperature condition required in the traditional process of preparing ammonia from urea is avoided, so that the energy consumption cost of a denitration system is reduced. In addition, the problem that ammonium carbamate is easy to cake in a low-temperature and high-humidity environment or a severe-temperature-fluctuation environment due to the fact that the temperature is close to or exceeds 25 DEG C in the denitration process is effectively avoided, and the risks of pipeline blockage and difficult decomposition are reduced. Compared with urea ammonia preparation, the ammonia preparation efficiency is improved by 4.8%-22.8% and averagely improved by 13.8%, the ammonia preparation energy consumption is reduced by 35%-42.6%, and meanwhile, the denitration efficiency of the generated mixed gas entering the flue gas selective catalytic denitration reactor can be improved by 3%-4.2%.

The utility model discloses a CO2 coal seam CH4 gas competitive adsorption heat effect testing device, and belongs to the field of coal mines. The device comprises a CH4 gas tank, a rare gas tank, a first high-pressure buffer tank, a first reference tank, a non-contact temperature measurement coal sample tank, an infrared thermal imager, a data acquisition and storage mechanism, a second reference tank, a second high-pressure buffer tank, a CO2 gas tank, a constant-temperature water bath, a vacuumizing mechanism, first and second pressure gauges, first to twelfth valves, first and second tee joints, first to third four-way joints, first and third pressure sensors, a CO2 concentration sensor and a CH4 concentration sensor. And connecting the components. The method has no influence on the replacement effect during testing, enables the measurement result to be accurate, can obtain the gas competitive adsorption and gas reciprocal diffusion rules in the process of replacing the CH4 in the coal seam by the CO2, can deeply analyze the driving mechanism and the action efficiency of the CH4 in the coal seam by the CO2 from the perspective of energy migration, and can improve the detection accuracy. And a theoretical support is provided for realizing reasonable optimization and efficiency maximization of key control parameters.

The invention belongs to the technical field of petroleum and natural gas engineering, and particularly relates to a shale gas reservoir multi-component seepage apparent permeability calculation method which comprises the steps that S1, shale gas reservoir micro-nano pores are equivalent to a channel formed by connecting a plurality of organic pore sections and inorganic pore sections in series, and a seepage physical model is constructed; s2, considering shale gas multi-component composition, and constructing a multi-component gas average molecular free path calculation model; s3, establishing a first apparent permeability calculation equation for inorganic pores; s4, for the organic pores, establishing a second apparent permeability calculation equation; and S5, respectively carrying out scale upgrading on the first apparent permeability and the second apparent permeability, and obtaining the shale multi-component seepage apparent permeability according to the proportion of the organic pores. According to the method, factors such as multi-component gas migration, pore size dynamic change, organic matter multi-component gas competitive adsorption and the like are comprehensively considered, and the shale gas reservoir apparent permeability calculation method integrating the factors is established.

A high-temperature stable titanium-based heterogeneous catalyst and its preparation method belong to the technical field of titanium catalysts. The present invention introduces silica sol modification in the carrier pretreatment stage, uses SiO2 to block the oxygen vacancies on the surface of YSG to enhance the hydrothermal stability; combines citric acid to Ti 4+ / Ce 3+ The chelation effect of the cerium layer achieves bimetallic co-dispersion, eliminating competitive adsorption. Finally, long-term heating at 750°C stimulates the directional migration of cerium to titanium grain boundaries, constructing a nanoscale pinning network. This fundamentally addresses the three major challenges of abnormal titanium grain growth, support structure degradation, and active component mismatch at high temperatures.