218 results about "Competitive adsorption" patented technology

The invention discloses a gas extraction drilling track inversion and control system, and relates to the technical field of gas extraction, and the key points of the technical scheme are that the system comprises a high-gas coal seam rapid control elimination and reduction system and a gas injection flow increasing dynamic evaluation system; according to the rapid control elimination and reduction system for the high-gas coal seam, a method of combining experimental research, numerical simulation and on-site industrial tests is adopted, the coal seam gas occurrence rule of a working face of a Chengne mining area is obtained, the multi-component gas competitive adsorption rule of a three-soft coal seam is defined, and therefore gas injection driving key technical parameters of a coal seam gas abnormal target area are mastered; a gas injection drive gas-carrying rapid and accurate extraction technical system suitable for the gas abnormal area of the Chengne mining area is formed; according to the gas injection flow increasing dynamic evaluation system, working parameters are designed and monitored, the gas concentration is accurately monitored, and real-time detection and automatic early warning are achieved.

The invention relates to the technical field of fine chemical engineering preparations, in particular to an environment-friendly non-silicon defoaming agent as well as a preparation method and application thereof. 3.6 to 5.1 parts of a defoaming aid; 0.24 to 0.35 part of a thickening agent; 2-3 parts of a dispersing agent; 2.6 to 3.5 parts of an emulsifier; 18 to 25.3 parts of an organic solvent; 65 to 82 parts of deionized water; wherein the polyether ester A and the polyether ester B with amphiphilic structures in the polyether ester can be quickly spread on the surface of foam, carry hydrophobic components to permeate a liquid membrane and accelerate foam breakage, and the defoaming assistant A and the defoaming assistant B further promote the defoaming and foam inhibition performance of the defoaming agent by reducing competitive adsorption to the defoaming agent and delaying release of active molecules. Compared with the prior art, the method has a wide application prospect.

The invention discloses a method for fracturing a low-permeability coal seam by linkage of CO2 and high-pressure water, which comprises the following steps of: performing hydraulic fracturing to form a part of fractures, forming a weak acid environment by utilizing the characteristic that a CO2 medium is easily dissolved in high-pressure water in a high-pressure environment, and promoting chemical reaction between acid water and mineral components on the surfaces of the fractures under the driving of concentration gradient and high-pressure injection, the fractures are pressed by high-pressure water at the same time, so that cooperative work of high-pressure fracturing and CO2 acidification anti-reflection is achieved, and a complex fracture network is formed in the coal seam; after permeability increasing, the pressure is relieved, the normal pressure environment is recovered, at the moment, CO2 media dissolved in the high-pressure water in the layer penetrating drill holes are partially recovered to be in the gas state, CO2 gas and gas can form competitive adsorption in the coal seam, a large amount of gas is displaced and desorbed from the interior of the coal seam, in the whole process, the permeability increasing effect on the coal seam can be effectively achieved, and the coal seam permeability increasing effect is achieved. And no extra damage is caused to the coal seam, finally, on the premise that more energy is not consumed, effective transformation of the pore structure volume of the coal body is achieved to the maximum extent, and the gas extraction efficiency is improved.

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 technical field of carbon dioxide sequestration and shale gas development, and particularly discloses a shale micro-nano pore multiphase multicomponent competitive adsorption data determination method and device, and the method comprises the steps: obtaining a shale core sample of a target area, and determining the type and relative content change characteristics of surface functional groups of the shale core sample; key structures and force field parameters of shale clay minerals in a target block are collected, and a shale clay mineral molecular model is established; establishing a plurality of fluid molecular models; establishing slit models, and establishing a multiphase fluid system model between the slit models to obtain a stable configuration; applying an external electric field to the stable configuration, and performing molecular dynamics calculation to obtain molecular trajectory coordinates and dynamics information of the multi-phase multi-component fluid; and calculating competitive adsorption data of the shale micro-nano pore multi-phase multi-component fluid under the action of the electric field. According to the scheme, the occurrence state and the competitive adsorption behavior of the shale micro-nano pore multi-phase multi-component fluid under the action of the electric field can be disclosed from the molecular scale.

The invention discloses a CO2 coal seam CH4 gas competitive adsorption heat effect testing method and device, and belongs to the field of coal mines. The method comprises the following steps: loading a dry coal sample into a non-contact temperature measurement coal sample tank, and measuring the free space volume V0 in the non-contact temperature measurement coal sample tank; different environment temperatures and competitive adsorption pressures are set, the first step is repeated for multiple times, multiple first data sets are obtained, a relation curve of eta and delta T is obtained, and each first data set comprises the competitive adsorption replacement ratio eta of CO2 and CH4 gas and the heat effect delta T of the competitive adsorption equilibrium coal sample. 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 discloses an improved AHP-CRITIC comprehensive weight-based material competitive adsorption performance evaluation method. The method comprises the following steps: performing hierarchical analysis on material competitive adsorption performance data by adopting a target-criterion-sub-criterion-index hierarchical framework to construct an evaluation index system; through an improved AHP-CRITIC combination method, calculating the comprehensive weight of each index in the overall evaluation model; collecting and calculating index data, and obtaining a comprehensive evaluation value through the evaluation model. The evaluation method can be used for scientifically and objectively evaluating the competitive adsorption performance of the material to the multi-element gas, the evaluation result accords with reality, the credibility is high, and the method has relatively high popularization and application values.

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 discloses a deep fluorine removal agent and application thereof in wastewater in the photovoltaic industry, and belongs to the technical field of fluorine-containing wastewater treatment.The deep fluorine removal agent is obtained by conducting coordination on cross-linked hybrid chitosan microspheres and lanthanum ions to obtain composite microspheres and then synthesizing zirconium-based MOF on the composite microspheres through a hydrothermal synthesis method. The pore channels of the MOF facilitate the passing of fluorine ions but not the passing of sulfate ions, play a certain barrier role, facilitate the enrichment of the fluorine ions on the surfaces of the composite microspheres and the selective adsorption of the lanthanum ions on the fluorine ions, so that the fluorine ions are fixed, and the combination stability of the fluorine ions and the lanthanum ions is greater than that of the sulfate ions. The sulfate ions are in disadvantage when competitive adsorption with the fluorine ions, the selectivity of the deep fluorine removal agent to the fluorine ions is improved, the magnesium ions can be combined with the fluorine ions to generate complexes and can be combined with the sulfate ions to generate soluble magnesium sulfate, and interference of the sulfate ions is reduced through cooperation of the magnesium ions and the sulfate ions.

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 a system and a method for strengthening corrosion of minerals by hot flue gas through coal seam zoning electroosmosis targeted water flooding, firstly, the hot flue gas is injected into a coal reservoir, CO2 of the hot flue gas displaces adsorbed gas in pores of the coal reservoir through a competitive adsorption effect, meanwhile, part of the CO2 is dissolved in water vapor of the hot flue gas and raw water in a coal body to form acidic water, and the acidic water is dissolved in water vapor of the hot flue gas; the acid water can corrode minerals in micropores of the coal reservoir to increase permeability of the coal body; when a water locking effect occurs in micropores of the coal reservoir, a high-voltage electric field is formed between every two adjacent drill holes, and the acidic water generates a targeted electroosmosis water driving effect under the action of the high-voltage electric field, so that the acidic water continuously moves in fractures of the coal reservoir in the direction of the electric field, and the water locking effect is broken; meanwhile, the acid water can promote multistage ionization of an acid medium in the solution to generate a large number of hydrogen ions under the action of electrified positive and negative electrodes, the mineral dissolution rate is increased, finally, the range and effect of hot flue gas on dissolution minerals in the coal reservoir are enlarged, and finally, the overall gas extraction efficiency of the coal reservoir is effectively improved.

The invention belongs to the technical field of gas adsorption and desorption testing, and discloses a one-stop gas-containing coal competitive adsorption-desorption-spontaneous combustion traceability system which comprises a gas supply unit, a program temperature control box, a vacuum pump and a control unit. A reaction unit is arranged in the program temperature control box and comprises a first preheating pipe, a second preheating pipe, a third preheating pipe, a first reference tank, a second reference tank and a coal sample tank. The invention further provides a testing method of the one-stop gas-containing coal competitive adsorption-desorption-spontaneous combustion traceability system. According to the invention, competitive adsorption and desorption under different temperatures and different pressure working conditions in an actual coal mine well and a heating oxidation process under an air leakage condition immediately after competitive adsorption in the coal mine well are fully simulated, so that the continuity and the accuracy of an experiment are improved. The method can be widely applied to the fields of coal mine safety production, gas disaster prevention and control and the like, and has important practical value and social benefit.

The invention relates to a mud-resistant slump-retaining polycarboxylic acid water reducer and a preparation method thereof. The polycarboxylic acid water reducer is prepared from the following raw materials: 80-100 parts of polyether macromonomer; 1-2 parts of a rigid unsaturated monomer; 1-2 parts of a crosslinking monomer; 2-3 parts of an unsaturated sulfonic acid monomer; 10 to 15 parts of unsaturated acid; 0.5-2 parts of an oxidizing agent; 0.5-2 parts of a reducing agent; and 1-2 parts of a chain transfer agent. According to the invention, ethylene glycol monovinyl ether polyoxyethylene ether is adopted as a polyether monomer, a cross-linking monomer itaconic acid polyethylene glycol ester is introduced to form a cross-linked network-shaped molecular structure, and rigid structures such as (4-vinyl phenyl) trimethoxysilane are introduced, so that friction layer adsorption of clay is avoided, adsorption sites on the surface of the clay are reduced, and the adhesion of the clay is improved; the competitive adsorption effect of clay on the polycarboxylate superplasticizer is weakened, and the mud resistance and the slump loss resistance are greatly improved.

The invention discloses a Cu-MOF / chitosan / tannic acid composite adsorbent and a preparation method and application thereof to uranium adsorption, and relates to the technical field of uranium-containing wastewater treatment.The preparation method comprises the steps that a certain amount of deionized water is added into a proper amount of tannic acid, stirring is conducted till the deionized water is completely dissolved, then a proper amount of chitosan, Cu-MOF and glacial acetic acid are added, stirring continues, then a proper amount of glutaraldehyde solution is added, stirring is conducted continuously, and the Cu-MOF / tannic acid composite adsorbent is obtained. And after oscillation and freeze drying, the Cu-MOF / chitosan / tannic acid composite adsorbent is obtained. The composite adsorbent prepared by the invention shows an extremely high uranium removal rate in uranium-containing wastewater treatment, and the uranium removal rate can reach 100%. Meanwhile, a competitive adsorption experiment shows that the composite adsorbent disclosed by the invention has excellent selectivity on uranium and can preferentially adsorb uranium ions even in a complex water environment, so that the efficiency and selectivity of treating uranium-containing wastewater are improved.

The invention discloses a preparation method of a VOCs oxidation catalyst, precious metal is dispersed in heteropolyacid through a self-propagating method, the activity of the precious metal is improved, and meanwhile, the cage-shaped structure of the heteropolyacid can be used as a supporting framework of the precious metal to improve the overall mechanical strength and stability of the catalyst; then the obtained powder catalyst and a second carrier are prepared into coating slurry together, cordierite is coated with the coating slurry through dipping, the coating is modified after drying, and therefore the competitive adsorption effect of water vapor on reaction gas on active sites is reduced, and the catalyst can be suitable for the VOCs treatment process with the high water content and the low operating temperature.

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.

An organic-inorganic composite admixture, its preparation method and its application in a calcined clay-limestone low-carbon cement system. The organic-inorganic composite admixture is prepared by free radical copolymerization of unsaturated carboxylic acid, 2-acrylamido-2-methylpropanesulfonic acid, methacryloylpropyltrimethylammonium chloride or acryloylpropyltrimethylammonium chloride, maleic anhydride grafted β-cyclodextrin, an oxidizing agent and a reducing agent, and then by electrostatic assembly reaction with POM polyoxometalate. In the present invention, a spatial cross-linked double network structure is formed through the characteristics of the β-cyclodextrin and polyoxometalate POM structures, resulting in a large steric hindrance and forming a sufficiently thick adsorption layer, which hinders the competitive adsorption of the clay on the admixture; double adsorption sites are formed through the carboxyl and sulfonic acid groups on the main chain and side chains, further enhancing the dispersion ability of the admixture in the LC 3 system, and finally achieving the characteristics of low dosage, high water reduction rate and excellent slump retention performance.

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 provides a method and equipment for detecting leakage based on a gas sensor, the method and equipment are used for a liquid or gas leakage detection device, and the leakage detection device comprises a vacuumizing device, a sealed low-pressure cavity and the gas sensor; the vacuumizing device is arranged outside the low-pressure cavity, communicates with the low-pressure cavity and is used for regulating and controlling the vacuum degree of the low-pressure cavity; the gas sensor is arranged in the low-pressure cavity; the method comprises the following steps: controlling a to-be-detected element in a low-pressure cavity to meet a detection condition; detecting a component leakage gas concentration change signal in the low-pressure cavity through a gas sensor; and based on the gas concentration change signal, determining whether the leakage rate of the to-be-detected element reaches the standard or not. According to the gas sensor, a low-pressure environment is generated through the vacuumizing device and the low-pressure cavity, competitive adsorption of gas molecules in a normal-pressure environment and gas molecules volatilized by the element to be detected on the surface of the sensor is reduced, the detection sensitivity of the gas sensor is improved, the detection limit is reduced, and the accuracy of leakage detection is improved.

The invention discloses a device for simulating utilization of carbon dioxide-hydrocarbon mixed gas to improve shale oil huff and puff recovery efficiency, which comprises a main branch, and the main branch is provided with a first auxiliary branch, a second auxiliary branch, a third auxiliary branch and a fourth auxiliary branch. The main branch is provided with a first auxiliary branch, a second auxiliary branch, a third auxiliary branch and a fourth auxiliary branch which are all arranged in the constant-temperature box, the first auxiliary branch is used for simulating saturated simulation oil entering a rock core, the second auxiliary branch is used for simulating preparation of CO2-hydrocarbon mixed gas, the third auxiliary branch is used for simulating well opening production, and the fourth auxiliary branch is used for simulating oil gas entering the rock core. And the fourth auxiliary branch is used for simulating the confining pressure on the rock core. By means of the device, the compressibility of CO2 in the early stage of huff and puff can be improved, the miscibility of CO2 and simulated oil in the later stage of huff and puff can be enhanced, then the dissolved gas drive effect is fully played, the carrying capacity of CO2 on crude oil in a pore throat is improved, meanwhile, the competitive adsorption capacity of CO2 in organic matter can be improved by adding propane, and therefore the recovery efficiency is improved.

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 present invention discloses an eggshell type catalyst, and a preparation method and application thereof in propylene hydroformylation reaction. The eggshell type catalyst uses phosphine ligand resin pellets with developed pore structure as a carrier and one, two or more than two of metals Rh, Co, Ir, Ru and Pd as active components. The spatial distribution of the active metal components in the resin pellets is effectively regulated through a method of finely regulating the porous channel structure of the carrier resin pellets and adding competitive adsorption and coordination, so that the prepared eggshell type catalyst has the characteristics of high activity in the propylene hydroformylation reaction and good selectivity of n-butyraldehyde in the product aldehyde.

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.