46 results about "Adsorption kinetic" patented technology

The application discloses a detection technology based on micro-plastic adsorption of a micro-fluidic chip, which forms a detection area by fixing micro-plastic particles in a chip channel in situ through a sodium alginate and calcium chloride system, and deducts background interference synchronously by using a parallel reference channel, and then pumps a solution containing a target adsorbate into the chip at a controllable flow rate, and simultaneously, real-time in-situ optical monitoring of the adsorption process is carried out by using a fluorescence technology, finally, the adsorption kinetics parameters and the adsorption isotherm are quantitatively calculated by analyzing the signal and time curve and the concentration gradient experiment, and the determination of the maximum adsorption capacity is realized; the micro-plastic is fixed, dynamic adsorption, real-time monitoring and data processing are integrated on the micro-fluidic chip platform, the problems that the traditional method cannot realize real-time observation, the background interference is large and the operation is complicated are effectively solved, and efficient quantitative analysis of the adsorption behavior of the micro-plastic is realized.

This invention discloses a covalent organic framework material for selective solid-phase adsorption and separation, its preparation method, and its applications. The material is prepared by polycondensation reaction of electron-deficient triazine rings with short-chain linkers such as hydrazine hydrate, forming a layered structure with a high specific surface area of ​​602 m² / g and a concentrated pore size of 2.0 nm to 3.0 nm. This structure exhibits high adsorption capacity (up to 1.0 mg / g), rapid adsorption kinetics, and excellent selectivity for PAHs in organic solutions through strong π-π interactions and pore confinement effects. The preparation process is simple and the conditions are mild. The material has good thermal stability (>300℃), and its performance retention rate is higher than 92% after 5 cycles. When applied to the solid-phase adsorption of PAHs in petroleum products such as lubricating oil and white oil, it effectively eliminates matrix interference, allowing direct analysis without complex purification steps after adsorption. This overcomes the limitations of traditional materials such as silica gel and activated carbon, which have weak adsorption capacity and require cumbersome post-treatment, providing a new high-performance adsorption material solution for the efficient detection of trace PAHs in petroleum products.

The invention relates to the technical field of water treatment intelligent control, and discloses a biochar adsorption capacity dynamics simulation and prediction system, which comprises a data acquisition module, an Arrhenius equation is utilized to introduce a temperature correction coefficient to carry out thermodynamic compensation on an adsorption dynamics constant; the flow state recognition module judges a forward adsorption or reverse desorption working condition based on a Langmuir model; the resistance decoupling module is used for calculating a mass transfer Biot number based on a double-membrane theory so as to distinguish diffusion resistance in a liquid membrane and particles, and distinguishing physical blockage and chemical saturation by utilizing a physical blockage index; the lag compensation module introduces a lag correction factor to correct the desorption equilibrium concentration, and calculates the recovery adsorption capacity during the reverse desorption period; and the life prediction module corrects the theoretical residual capacity by using the dynamic utilization rate coefficient and generates an operation and maintenance instruction. According to the invention, through resistance decoupling and lag compensation mechanisms, physical and chemical attenuation mechanisms are effectively distinguished, and accurate prediction of the adsorption penetration time under the dynamic working condition is realized.

The present application relates to the technical field of gas monitoring, and is a kind of sulfur hexafluoride gas on-line monitoring system and method, specifically comprising: constructing surface adsorption kinetics equation to obtain the real-time surface adsorption amount of sulfur hexafluoride arc extinguishing decomposition product in the key components of arc extinguishing chamber;According to the thermal ablation term, the metal vapor generation rate is calculated;Establish a physical evaluation model for the influence of the surface adsorption layer in the arc extinguishing chamber on the flow field performance and heat transfer performance, and evaluate the flow field distortion factor and the thermal recovery retardation factor;Combined with the spatial position sensitive weight, the working performance degradation index of sulfur hexafluoride is predicted;According to the working performance degradation index of sulfur hexafluoride, the trigger judgment of sulfur hexafluoride monitoring alarm is carried out.The present application solves the problem that the gradual degradation of sulfur hexafluoride arc extinguishing ability cannot be accurately predicted and early warned in the prior art.

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 application belongs to the technical field of marine environmental protection and functional materials, and particularly relates to a marine oil stain adsorbing material based on a mussel bionic structure, a preparation method and a device, which comprises a porous base material, a polydopamine interface layer and a metal-polyphenol network; the porous base material has three-dimensionally connected pores; the polydopamine interface layer is formed on the surface and internal pores of the porous base material through self-oxidation polymerization of dopamine; and the metal-polyphenol network is formed by coordination of transition metal ions and plant polyphenols on the polydopamine interface layer. By constructing a PDA-metal-polyphenol ternary synergistic interface, efficient capture and firm combination of high-viscosity crude oil are realized, a hierarchical porous structure is induced to form through an ozone rapid polymerization method, and the adsorption kinetics and thermodynamic performance are comprehensively improved, and after saturation of the material, the material can be quickly recovered through an external magnetic field, and regeneration can be realized through pH adjustment or heating.

The invention relates to the technical field of adsorption materials, and particularly discloses a molecularly imprinted hydrogen bond organic framework adsorption material as well as a preparation method and application thereof. According to the material, tetra (4-sulfonyl phenyl) methane and 1, 1 '-diamino-4, 4'-dipyridyl diiodide are used as construction units to form a hydrogen bond organic framework substrate, and a hemp essence drug template molecule is introduced to construct a specific imprinting hole in the hemp essence drug template molecule. The preparation method is characterized in that the molar ratio X of template molecules to tetra (4-sulfonyl phenyl) methane is controlled to be 0.05-0.5, crystallization is performed in a water / methanol mixed solvent, and then elution and activation are performed through an acid solution with the pH being 2-4. The material has the advantages of high adsorption capacity, no less than 58 mg / g of template molecule adsorption capacity, high selectivity and rapid adsorption kinetics, achieves balance within 5 minutes, can efficiently enrich trace hemp extract drugs from a water environment or biological fluid, and solves the technical problem that the selectivity, the capacity and the mass transfer rate of the existing adsorption material are difficult to consider at the same time.

The application provides a copper adsorption material and a preparation method and application thereof, and the copper adsorption material is prepared by using salicylic hydrazide monomers and methacrylic acid as raw materials through an emulsion polymerization method. The salicylic hydrazide monomers used in the application are salicylic hydrazide derivatives with introduced propylene bonds, and the multi-dentate coordination structure of the salicylic hydrazide derivatives can specifically chelate copper ions; the hydrophilic monomer used is methacrylic acid, and the carboxyl group of the methacrylic acid can bring good hydrophilic performance to the material and improve adsorption kinetics. The copper adsorption material of the application is applied to a mixed solution containing copper ions, nickel ions and cobalt ions to selectively separate copper ions.

The present application relates to the pore-matrix parameter estimation method and system considering the non-equilibrium adsorption influence, including the steps: the pore-matrix system non-equilibrium reactive solute transport analytical model is established, and the semi-analytical solution is solved;Obtain the measured soil column experiment data, monitor the organic compound phenanthrene solute concentration of fixed observation point in the set time range to obtain the breakthrough curve;The semi-analytical solution obtained is fitted with the breakthrough curve of the measured data, the parameter value corresponding to the fitting curve meeting the set condition is selected, and the parameter value is used as the estimation value of the corresponding coefficient;The present application utilizes the optimal fitting wiring to determine the corresponding pore dispersion coefficient, diffusion coefficient, first-order adsorption kinetic coefficient in the pore and first-order adsorption kinetic coefficient in the matrix, links the measured results with the theoretical results, and fully excavates the utilization value of the existing data.

The application relates to the technical field of intelligent water treatment control, and discloses a system for simulating and predicting the kinetics of the adsorption capacity of biochar, which comprises the following modules: a data acquisition module uses the Arrhenius equation to introduce a temperature correction coefficient to perform thermodynamic compensation on adsorption kinetic constants; a flow state recognition module determines a forward adsorption or reverse desorption working condition based on the Langmuir model; a resistance decoupling module calculates the mass transfer Biot number based on the double membrane theory to distinguish the liquid film and the internal diffusion resistance of the particles, and uses a physical blockage index to distinguish physical blockage and chemical saturation; a hysteresis compensation module introduces a hysteresis correction factor to correct the desorption equilibrium concentration and calculate the recovery adsorption capacity during the reverse desorption; and a service life prediction module uses a dynamic utilization rate coefficient to correct the theoretical residual capacity and generate operation and maintenance instructions. Through the resistance decoupling and hysteresis compensation mechanisms, the physical and chemical attenuation mechanisms are effectively distinguished, and the precise prediction of the adsorption breakthrough time under dynamic working conditions is realized.

The invention relates to the technical field of adsorption detection, and discloses an imidazolium resin adsorption kinetic parameter online identification method and system.The method comprises the steps that 1, flow, inlet and outlet water concentration, conductivity, temperature and pH value are synchronously collected, and apparent ion strength is obtained through the conductivity; step 2, performing mass balance based on the flow, the inlet and outlet water concentration and the resin dry basis mass to obtain a real-time track of the average adsorption capacity of the resin; step 3, constructing counter-ion coupling isothermal driving force and screening a quasi-balance section; 4, solving isothermal coupling parameters by combining a quasi-balance relational expression; 5, calculating an overall mass transfer coefficient point by point; step 6, simultaneously solving an outer membrane mass transfer proportionality coefficient and an in-hole mass transfer coefficient under two levels of flow; and step 7, constructing a core parameter group and outputting a consistency judgment result identifier. According to the method, online identification and consistency judgment of the adsorption thermodynamic parameters and the mass transfer kinetic parameters of the imidazolium resin are realized.

The invention relates to the technical field of gas monitoring, in particular to a sulfur hexafluoride gas on-line monitoring system and method.The method specifically comprises the steps that a surface adsorption kinetic equation is constructed, and the real-time surface adsorption quantity of key components in an arc extinguish chamber to sulfur hexafluoride arc extinguish decomposers is obtained; calculating a metal vapor generation rate according to a thermal ablation item; establishing a physical evaluation model of the influence of the surface adsorption layer in the arc extinguish chamber on the flow field performance and the heat conduction performance, and evaluating to obtain a flow field distortion factor and a heat recovery retardation factor; combining the spatial position sensitive weight to predict the working performance degradation index of the sulfur hexafluoride; and according to the working performance degradation index of sulfur hexafluoride, performing triggering judgment of sulfur hexafluoride monitoring alarm. The problem that in the prior art, accurate prediction and early warning cannot be carried out on progressive degradation of the arc extinguishing capacity of the sulfur hexafluoride gas is solved.

This invention discloses an AI-based multi-channel dehumidification control method and system for a biodegradable instrument, including multi-channel gas distribution, primary condensation dehumidification, secondary adsorption dehumidification, sensor acquisition, AI intelligent monitoring, control execution, and feedback optimization. The AI ​​intelligent monitoring module, based on a physical information neural network, fuses data on temperature, humidity, flow rate, pressure, condensate volume, silica gel state, and energy consumption, and incorporates heat exchange, gas flow, adsorption kinetics, and energy balance constraints to predict outlet air humidity, dehumidification efficiency, silica gel lifespan, and abnormal states, automatically adjusting cooling power, circulating pump speed, valve opening, and drainage frequency. This invention enables adaptive control, predictive maintenance, and unattended operation of the multi-channel dehumidification process, improving detection stability and reducing maintenance costs.

The invention discloses a printing tail gas treatment method, particularly relates to the technical field of volatile organic compound waste gas treatment, and is used for solving the problems of VOCs purification efficiency reduction and catalyst stability degradation caused by water vapor competitive adsorption under a high-humidity working condition in the prior art. According to the method, humidity parameters and adsorption operation parameters of an adsorbent layer are monitored in real time, a high-humidity working condition is judged based on adsorption dynamic characteristics, a pre-desorption program for preferentially removing moisture is started, and accurate regulation and control of the process are realized by synchronously monitoring a desorption rate ratio and thermal stress distribution. And finally, efficient separation and purification of water and organic matters are realized through staged desorption treatment, so that the catalyst performance is effectively protected while the treatment capacity of the system is maintained, and the overall operation stability is improved.

This invention discloses a method and apparatus for optimizing the feeding frequency of particulate friction stir additive manufacturing. First, feeding experiments are conducted under different operating conditions to collect pressure and displacement data. A mechanism-empirical hybrid model of the dynamic coupling relationship between pressure, displacement, and feeding frequency is established. An uncertainty set is defined. A robust optimization model for the feeding frequency is established. The dual objective is transformed into a single objective through weighted summation. The inner worst-case scenario is solved. The outer optimization employs adsorption kinetics-enhanced gradient descent. This invention uses an improved gradient descent algorithm as the core optimizer, requiring only one calculation of the inner worst-case scenario and gradient per generation. The computational load is significantly less than that of population-based algorithms, making it suitable for embedding in real-time control systems for online optimization. Combined with adaptive learning rate, dynamic diffusion intensity, and desorption probability adjustment mechanisms, the algorithm achieves rapid convergence while maintaining global search capability, providing an efficient and feasible technical solution for online dynamic tuning of the feeding frequency.

The invention relates to the technical field of nuclear radiation monitoring, in particular to a remote tritium on-line monitoring system, which comprises a data acquisition module for synchronously acquiring tail end tritium concentration, pipeline on-way environmental parameters and environmental background radiation data; the coupling model building module is used for building a gas-solid interface adsorption kinetics and fluid transportation coupling model and determining a dynamic transmission transfer function; the source item inversion reconstruction module is used for executing deconvolution operation and reversely deducing the real tritium concentration of a source end; the state evaluation and threshold adjustment module is used for calculating pipeline adsorption saturation in real time and dynamically adjusting an alarm threshold; the early warning generation module is used for generating an early leakage early warning instruction; the operation and maintenance prediction module is used for identifying pipeline maintenance requirements based on the adsorption performance decline trend; according to the invention, the defects of signal lag and peak smoothing are overcome, and second-level response to sudden pulse leakage is realized.

The invention discloses an adaptive optimization method and system for the usage amount of a getter for aerospace helium purification, and relates to the technical field of gas separation and purification, and the method comprises the steps: obtaining multi-source data of a purification system; fusing the multi-source data; based on the fused data, predicting an outlet hydrogen concentration change trend of the third-stage chemical adsorption purifier in a future preset time period by utilizing a preset adsorption kinetic model and a getter capacity model; constructing an optimization problem taking the minimum getter dosage as an optimization target and taking the condition that the outlet hydrogen concentration does not exceed a set threshold value as a constraint condition, and solving to obtain the optimal getter dosage at the current moment based on a model prediction control algorithm; and calibrating and updating parameters of the adsorption kinetic model and / or the getter capacity model. The application can dynamically optimize the use amount of the getter, significantly reduce the consumption and operation cost, and improve the dehydrogenation stability and the system intelligence level.

The invention provides a preparation method and application of a naphthalene bridged tetraurea macrocycle, and belongs to the technical field of adsorption material preparation. According to the invention, 4, 4 '-methylene bis (phenyl isocyanate) and 1, 5-diaminonaphthalene are used as raw materials to prepare the naphthalene bridged tetraurea macrocyclic material. The naphthalene bridged tetraurea macrocyclic material has a fluffy porous structure, can be used for adsorption separation of elemental iodine and iodide ion pollutants, shows excellent iodine adsorption capacity and rate, also shows extremely high adsorption kinetics rate and high interference resistance, and can be recycled for multiple times.

A system for the environmentally friendly synthesis, adsorption testing and characterization of nickel oxide nanoparticles, comprising: a plant extract processing plant configured to extract a phytochemical-rich solution from gooseberry biomass by controlled Soxhlet reflux and continuous water circulation; a pre-reaction and mixing chamber which is operationally connected to the extract preparation unit and is configured to receive metered volumes of the extract and an aqueous nickel nitrate hexahydrate solution, the chamber comprising a temperature-controlled stirrer, a pH probe and a peristaltic feed pump to maintain the homogeneity of the solution and the pH within a predefined range; a microprocessor-controlled calcination and combustion unit connected downstream of the reaction chamber and configured to thermally decompose the reaction mixture into nickel oxide nanoparticles under programmed temperature cycles between 300 °C and 700 °C; a nanoparticle collector and drying system configured to separate, transport and dry the synthesized nanoparticles under inert air circulation at controlled temperature; an adsorption test module with two reaction chambers for simultaneous testing of the adsorption of amaranth dye and hexavalent chromium, each reaction chamber comprising an integrated UV-Vis probe, magnetic stirrer, heating plate and microvalve-controlled reagent inlets for pH modulation; a characterization interface configured to transmit optical and surface data from the nanoparticles via dedicated optical and mechanical coupling ports to analytical instruments such as UV-Vis spectrophotometers, FTIR spectrometers, XRD analyzers, and SEM imaging systems; and a central control and processing unit consisting of a microcontroller configured to receive sensor data from temperature, pH and optical transducers, execute synthesis and adsorption control techniques, calculate adsorption kinetics and output real-time process parameters as well as adsorption efficiency.

Pollution by phosphates affect aquatic life as they have side effects even at very low concentrations. Silica molybdate is prepared by first chlorinating silica sand using phosphorous pentachloride to give chlorinated silica which is aminated using ethylenediamine and thereafter treated with sodium molybdate. The molecular structure of the silica molybdate was characterized using Fourier Transform Infrared (FT-IR). FT-IR results showed Adsorption bands at 854cm-l and 542cm-l which were attributed to Mo=O and Mo-O stretching in molybdate. Peaks observed at 1388 and 1662cm-1 were attributed with the vibration mode of Mo-OH bond and bending mode of adsorbed water. Spectra peaks observed at 542, 634.58 and 898.97 cm-1 were attributed to the adsorption of molybdate. The physical adsorption parameters which were examined using batch adsorption system were; temperature, pH, contact, time, initial concentration using sorption models, adsorption kinetics and thermodynamics. Results showed that optimum pH for biosorption of P042- was 6.0, optimal contact time was 30 minutes, optimum temperature was 45°C. The experimental results obtained showed that the maximum phosphate adsorption of silica molybdate at optimum conditions was found to be 94.73% in water.

A method for predicting boron distribution in corrosion product deposits based on variable porosity is proposed. This method constructs the adsorption equilibrium of boron within the deposit layer through adsorption kinetics, obtaining the dynamically changing porosity of the corrosion product deposit layer. Transport equations for boron convection, diffusion, adsorption, and precipitation are then established. A mathematical model of boron transport coupled with chemical reactions based on dynamic variable porosity is obtained by discretization using the finite volume method. The model is iteratively solved to obtain the boron distribution under dynamic variable porosity in the corrosion product deposit layer. This invention can realize variable porosity during the boron precipitation process within the corrosion product layer and accurately predict the boron concentration distribution under variable porosity caused by boron precipitation in the corrosion product deposit layer.

The invention discloses a metal organic framework adsorbent based on NaOH regulation and control and a preparation method and application thereof. The preparation method comprises the following steps: adding an organic ligand source, a metal source and a specific surface area regulating agent into a solvent, and uniformly stirring; the preparation method comprises the following steps: adding a chromium-based organic metal framework adsorbent into a reaction kettle, heating at 190 DEG C for 24 hours, reacting, separating to obtain a light green precipitate sample, cleaning, drying to obtain powder, and heating and activating to finally obtain the metal (chromium-based) organic metal framework adsorbent with larger specific surface area. The high air water adsorption capacity of the high-hygroscopicity metal organic framework material adsorbent based on NaOH regulation and control is attributed to introduction of a proper amount of NaOH, the crystal nucleation rate is induced to be increased through an in-situ alkaline environment, and accurate regulation and control of the grain size from the high nanoscale to the low nanoscale are achieved; the specific surface area is increased, so that more hydroxyl groups are exposed on the surface, the surface hydroxyl density is improved, the increase of active sites is beneficial to large adsorption capacity and rapid adsorption kinetics, and the composite material can be applied to air water trapping.

The application discloses a carbazole-maleimide alternating conjugated macrocyclic material for efficient capture of radioactive triiodide and a preparation method thereof. The conjugated macrocyclic compound has a rigid pi conjugated skeleton, can be efficiently synthesized through one-step tandem condensation reaction, and can obtain two different crystal conformations (MC-Czalpha and MC-Czbeta) through crystal condition regulation. The two conformations show significant differences when adsorbing triiodide (I3 ‑ ), wherein the MC-Czalpha conformation has superfast adsorption kinetics, the rate constant can reach 5.44*10 ‑2 g·mg ‑1 ·min ‑1 , and high removal efficiency is maintained in a wide pH range, and the reuse performance is stable. The conjugated macrocyclic compound has a clear structure, excellent adsorption performance, and has a good application prospect in the fields of nuclear waste treatment, environmental remediation and iodine detection.

The invention provides a triazole pyridine extractant-hollow tetrazinyl COF composite material as well as a preparation method and application thereof, and relates to the technical field of material preparation. The preparation method comprises the following steps: firstly, taking hydroformylated SiO2 as a hard template, carrying out step-by-step polymerization and alkali etching to obtain a tetraazinyl covalent organic framework (COF) material of an ethylene connecting bond with a hollow structure, and then further introducing an extracting agent molecule with a specific multi-tooth coordination structure into a cavity of the tetraazinyl covalent organic framework (COF) material by utilizing a pressure difference-concentration difference method to obtain the composite material. According to the composite material, the high specific surface area and short mass transfer path of the hollow structure, the strong coordination capability of the tetrazine group and the high selective recognition function of the extraction agent are synergistically integrated, so that the composite material shows high adsorption capacity, fast adsorption kinetics, excellent selectivity and good reusability on thorium ions; the method has important application value in the field of efficient separation and recovery of actinide elements in radioactive wastewater.

The invention relates to the technical field of environmental protection, and provides a preparation method and adsorption application of a zwitterionic covalent organic framework. According to the preparation method, trialdehyde phloroglucinol, 2, 2 '-disulfonic acid benzidine and 5, 5'-diamino-2, 2 '-dipyridyl are taken as raw materials, and the zwitter-ion functionalized covalent organic framework is constructed. The pores of the zwitter-ion covalent organic framework are internally provided with anion and cation sites which are uniformly distributed, and selective adsorption of ciprofloxacin can be realized through synergistic electrostatic interaction; meanwhile, the zwitter-ion covalent organic framework has regular porous channels and excellent hydrophilicity, rapid and effective diffusion of ciprofloxacin is promoted, and the zwitter-ion covalent organic framework has high adsorption capacity and rapid adsorption kinetics. The method is simple and low in cost, and the prepared material is clear in structure and good in hydrophilicity, can efficiently adsorb ciprofloxacin and has a good application prospect.

The application discloses a method for removing heavy metal ions, which comprises the following steps: mixing a modified fabric with a solution containing heavy metal ions for a period of time, and then taking out the modified fabric, so that the heavy metal ions are removed; or passing the solution containing heavy metal ions through the modified fabric, so that the heavy metal ions are removed. Comparative tests on the adsorption of the modified fabric to Cr(VI) in water show that CF-FA-UiO-66-NH2 has the best adsorption effect, and the adsorption capacity of CF-FA-UiO-66-NH2 is 3.297 mg / g at 25 DEG C. Research shows that the adsorption of CF-FA-UiO-66-NH2 to Cr(VI) in the aqueous solution is best at pH 2, and the competitive positive metal ions have no obvious influence on the adsorption of Cr(VI), and the adsorption kinetics model of CF-FA-UiO-66-NH2 is consistent with a quasi-second kinetics model. Moreover, the modified fabric has certain filter separation function to Cr(VI).

The present application relates to a kind of rich hydroxyl defective carbon nitride rare earth adsorbent and its preparation method and purposes, the preparation raw material of the rich hydroxyl defective carbon nitride rare earth adsorbent includes precursor, alkali metal chloride, ammonium chloride and water;The present application is obtained by mixing precursor, alkali metal chloride, ammonium chloride and water mixture, the mixture obtained by ion-induced thermal polymerization strategy, preparation obtains the rich hydroxyl defective carbon nitride rare earth adsorbent, and has extended nanopore structure;The rich hydroxyl defective carbon nitride rare earth adsorbent of the present application has high adsorption capacity, fast adsorption kinetics and higher selectivity and good cycle stability, is used in the recovery efficiency of rare earth ion in leaching tail liquid, and preparation raw material is low in price, and preparation process is simple.

The invention discloses a system and a method for testing steam / gas adsorption performance of a material by a gravimetric method. Test equipment mainly comprises a gas source part, a steam generation part and a detection part. The gas source part is mainly composed of inert gas and adsorption gas to be detected; the steam generation part consists of a gas flow control valve, a pneumatic valve, a safety bottle, a steam generator and a gas mixing bottle; the detection part is mainly composed of a computer and a thermogravimetric analyzer. According to the invention, the thermogravimetric analyzer is connected with external gas path equipment, so that the adsorption test of various steam and gas can be realized, the mass change of the sample in the adsorption process can be monitored in real time, the test result deviation caused by manual operation and data recording is avoided, the manpower and time cost of long-time continuous test can be saved, and the test efficiency is improved. And the test efficiency and the test accuracy are improved. In addition, the test system can test the adsorption capacity and the adsorption dynamic performance of the test piece from the normal temperature to 800 DEG C, and the practicability and the test range of the test piece are greatly widened.

The invention relates to a corrosion product deposition layer boron distribution prediction method based on variable porosity, which comprises the following steps of: constructing the adsorption equilibrium of boron in a deposition layer through adsorption kinetics, and establishing a transport equation of convection, diffusion, adsorption and precipitation of boron after obtaining the dynamically changed porosity of the corrosion product deposition layer; discretization is carried out through a finite volume method to obtain a boron transport coupling chemical reaction mathematical model based on the dynamic variable porosity, iterative solution is carried out on the boron transport coupling chemical reaction mathematical model, and boron distribution of the corrosion product deposition layer under the dynamic variable porosity is obtained. According to the method, the variable porosity in the boron precipitation process in the corrosion product layer can be realized, and the boron concentration distribution of the corrosion product deposition layer under the variable porosity caused by boron precipitation can be accurately predicted.

The invention discloses a hybrid modeling method and system for optimizing the separation performance of a sequential simulated moving bed, and the method achieves the high-precision modeling of the separation process of the sequential simulated moving bed through constructing a transfer diffusion mechanism model which retains mass conservation, and embedding a dual-branch neural network to replace a conventional adsorption kinetic model. Representative data covering main operation states are obtained through low-cost double-column experimental design, joint optimization is carried out on a neural network structure and model parameters in combination with an L-SHADE algorithm and a grid search method, and the model precision and generalization ability are remarkably improved. Compared with the prior art, the method has the advantages that the physical interpretability of a mechanism model and the flexibility of a data-driven model are effectively fused, the dependence on complex adsorption kinetics experiments and large-scale historical data is reduced, and the method is suitable for performance evaluation and industrial optimization of complex separation processes such as xylooligosaccharide purification.