23results about "Chemical analysis using catalysis" patented technology

This invention provides a method for determining the deactivation temperature and deactivation characteristics of a hydroformylation catalyst, comprising: S1. preparing a hydroformylation reaction solution; S2. measuring the reaction solution and placing it in an adiabatic testing instrument to simulate a hydroformylation reaction, stopping the heating when the temperature reaches T0 and incubating the reaction under adiabatic conditions; recording the temperature change and obtaining the highest temperature T. m S3. After cooling the test ball, remove half of the reactant material, add the hydroformylation reaction raw material, and heat up to simulate the hydroformylation reaction. When the temperature reaches T1, stop heating and perform an adiabatic reaction. Record the highest temperature T. mf S4. Compare T1 and T m and T mf If T mf =T1, catalyst deactivation temperature is T m Irreversible inactivation; if T mf =T m The catalyst deactivation temperature is T m Reversible inactivation; if T mf >T m Remove the material from the test sphere and repeat steps S2 to S4. The judgment method of this invention has a short testing cycle, high safety, and eliminates the need for sample separation and component analysis. It provides guidance for research on catalyst operating limits and the selection of homogeneous catalyst recovery temperatures.

This invention primarily relates to the field of ammonia cracking reaction technology. It discloses an ammonia cracking reaction testing system, comprising a temperature control module, an ammonia supply module, an ammonia cracking reaction module, and an analysis module. The temperature control module controls the target temperature for the ammonia cracking reaction. The ammonia cracking reaction module is used to crack the ammonia gas supplied by the ammonia supply module at the target temperature to obtain a mixed gas. The analysis module is used to analyze the composition of the mixed gas and obtain ammonia cracking reaction test data. This application enables detailed testing and analysis of the performance and stability of ammonia cracking reaction devices and catalysts, thereby generating a large amount of low-cost ammonia cracking experimental data.

The application discloses an electrocatalyst high-throughput screening platform for an electrocatalytic reaction system and a method thereof. The platform takes a flow electrolytic cell and a high-throughput pipetting workstation as cores, and integrates gas chromatography (GC) and nuclear magnetic resonance (NMR) rapid product analysis. The platform adopts an aluminum alloy gantry four-axis (XYZ1Z2) moving mechanism to realize spatial positioning of clamping and pipetting. The high-throughput pipetting workstation provides a gun head storage module, a reagent bottle storage module, a rotating bottle cap module and an electrocatalyst preparation module to realize accurate liquid proportioning and electrocatalyst preparation. The electrochemical test workstation is internally provided with a flow electrolytic cell and the like to realize continuous flow electrolysis, automatic sampling and electrolyte circulation. The GC / NMR module realizes online rapid detection of products. The platform realizes unattended, repeatable catalyst preparation and high-throughput screening of the whole process through unified control of a circuit and an upper computer. The electrocatalytic reaction system is a carbon dioxide reduction reaction system.

This invention relates to the field of catalytic oxidation performance testing technology, and discloses a VOCs catalytic oxidation performance testing device including a gas preparation system, a fixed-bed reactor, a heating system, and a gas chromatograph. The fixed-bed reactor includes at least three sets of reaction tubes, and the heating system is a furnace, with all three sets of reaction tubes located inside the furnace. Each reaction tube includes an outer pipe, an inner pipe, and two connecting flanges. An annular channel is formed between the outer and inner pipes, and the annular channel is connected to the gas preparation system via the connecting flanges. The three independent reaction tubes of this invention support simultaneous or stepwise testing, and a single experiment can complete the comparative analysis of three catalysts, ensuring the consistency of experimental conditions. Furthermore, the leak-proof components (copper outer and inner barriers) combined with the side-pull plate lifting structure innovate the catalyst recovery method from the traditional inverted method to a lifting method, effectively improving the recovery efficiency.

The application provides a fixed bed low-temperature chemical adsorption instrument, and relates to the fields of multiphase catalysis and surface interface chemistry. The fixed bed low-temperature chemical adsorption instrument comprises a gas mixing and purification system, a reactor, a high-temperature pretreatment pool, a low-temperature desorption pool and a mass spectrum detection system; the reactor is used for loading a sample; the reactor is detachably connected with the high-temperature pretreatment pool and the low-temperature desorption pool respectively; the mass spectrum detection system is connected with the high-temperature pretreatment pool and the low-temperature desorption pool respectively; and the gas mixing and purification system is detachably connected with the reactor. The application can realize in-situ pretreatment of a solid sample at a high temperature within 800 DEG C, low-temperature constant-temperature adsorption at about -180 DEG C, linear programmed temperature desorption from -180 DEG C to 300 DEG C, and integration of a high-precision gas mixing control system, thereby providing a standardized tool for "near-zero disturbance" accurate characterization of the acid-base properties of an oxide surface.

The application discloses an integrated pilot detection SCR catalyst regeneration online quality system, which comprises a regeneration device, an integrated pilot detection device and a control device. The regeneration device is provided with dust removal, water washing, pickling and drying components. The water washing and pickling components are provided with online detection and automatic control components. The integrated pilot detection device is provided with a detection platform and a micro-SCR reactor at the end of a regeneration platform process. The online automatic sampling detection of the regenerated catalyst is realized through a quick clamping interface. The system is electrically linked with the three components, replaces the traditional offline sampling inspection and solves the detection lag problem. The real-time data replace the experience adjustment parameters, break the single parameter regulation mode, realize the reverse regulation of the production parameters based on the product performance data, guarantee the stable and consistent regeneration quality, reduce the rework cost, and improve the process refinement and self-adaptive optimization level.

The present application relates to the technical field of Congo red derivative photocatalytic probe application, and particularly relates to a Congo red derivative photocatalytic probe, a preparation method and a use method thereof, comprising a compound I, the compound I is selected from at least one of the Congo red derivative photocatalytic probes, and the Congo red derivative photocatalytic probe comprises two arene, the arene represents an aromatic heterocycle, and the aromatic heterocycle is selected from one of a benzene ring, furan, thiophene and a naphthalene ring. The Congo red derivative photocatalytic probe provided by the present application can specifically label amyloid plaques in AD brain tissue slices, the binding affinity is significantly improved (Kd of Aβ 1‑40 The Congo red derivative photocatalytic probe can reveal the molecular heterogeneity of amyloid deposition and the key regulatory role of the mitochondrial autophagy-lysosome axis, provide a new tool for AD pathological mechanism research, support proteomic analysis and pathological mechanism analysis across brain regions (hippocampus / cortex), and protect the molecular structure and application in the research of neurodegenerative diseases.

In order to enable a vaporizing member and a catalyst to be disposed close to one another in a configuration in which a sample vaporized by the vaporizing member is caused to pass through the catalyst, a total organic carbon meter 100 for measuring the total organic carbon contained in a liquid sample includes a combustion reaction portion 32 for burning the total organic carbon contained in the liquid sample to generate carbon dioxide, and a carbon dioxide detecting portion X for detecting the carbon dioxide generated by the combustion reaction portion 32, wherein the combustion reaction portion 32 includes a combustion furnace main body 33, a vaporizing member 34 accommodated inside the combustion furnace main body 33, a heating mechanism for heating the vaporizing member 34, and the catalyst, disposed below the vaporizing member.

The application discloses a test method for analyzing electrocatalytic process on a nanosecond time scale. The method comprises the following steps: firstly, a pulse voltage with a frequency of 1 kHz is applied between a working electrode and a counter electrode in an electrolytic cell, a synchronous signal of the pulse voltage is input into a time sequence card to convert the signal into a 2 kHz synchronous signal, and a pulse super-continuous white light source is triggered. The pulse white light generated by the light source is focused on a sample to be measured in the electrolytic cell, and the white light passing through the sample is collected by a high-speed spectrometer. The high-speed spectrometer is synchronous with the trigger signal of the super-continuous white light source, and a pulse white light spectrum is recorded every 450 us. The white light spectrum before and after the pulse voltage is applied is recorded by the high-speed spectrometer respectively, and the influence of the pulse voltage on the sample absorption spectrum is calculated. The time delay between the pulse voltage and the pulse white light is changed by the time sequence card, and the spectrum change at different moments is recorded.

The application discloses a high-throughput aging device for rare earth catalytic materials, and relates to the field of catalyst aging experiment design.The device comprises a flow guide shell, the two ends of the flow guide shell are a small-diameter end and a large-diameter end, the small-diameter end of the flow guide shell is communicated with an external gas source through a gas inlet pipe, the large-diameter end of the flow guide shell is connected with a plurality of connecting pipes and is communicated with the inside of the connecting pipes, each connecting pipe is provided with a sample placement position, and a turbulent flow generator is arranged at the small-diameter end of the flow guide shell and is used for making the passing gas turbulent flow.

The present application relates to the technical field of detection, and especially to a method for detecting hydrogen sulfide based on nano yttrium oxide-indium oxide composite material catalytic luminescence, which provides a method for detecting hydrogen sulfide based on nano Y2O3-In2O3 composite material catalytic luminescence, and adopts nano Y2O3-In2O3 composite material to detect hydrogen sulfide; in the nano Y2O3-In2O3 composite material, the molar ratio of Y and In is 0.8-1.2:1.The present application uses nano Y2O3-In2O3 composite material as sensitive material for detecting hydrogen sulfide by catalytic luminescence, and the surface of the nano Y2O3-In2O3 composite material has a large number of active oxygen, which promotes the reaction of hydrogen sulfide, and can realize rapid and accurate detection of hydrogen sulfide.The method has the advantages of high sensitivity, good specificity, good reproducibility and stability, fast response speed, high precision and the like.

The present application relates to the technical field of gas-solid phase catalytic reaction experiment, and particularly relates to a gas-solid phase catalytic reaction experiment method and experiment equipment. A rack bottom mounting plate is used for placing reagent bottles, and the reagent bottles mainly contain reagents used in experiments. A feeding pump is assembled in the rack, and the feeding pump is connected with the reagent bottles and a preheater through pipelines, so that the reagents in the reagent bottles can be powerfully delivered to the preheater to complete preheating treatment. The reagents after preheating are introduced into a main reactor through the pipelines, and gas-solid phase catalytic reaction is carried out in the main reactor. The reagents after reaction are delivered to a condenser to be cooled, and the cooled materials are then sent into a separation part to realize gas-liquid separation. Valves are arranged at the bottom of the separation part, so that the separated liquid can be controllably discharged, and the separated gas is delivered to a gas flow meter through pipelines, and the gas flow meter completes flow detection and measurement.

The present disclosure relates to a method of quantification of methane enhancements. The method includes deploying an anemometer of a measurement system to measure wind variables at a point source emitter. A trace gas analyzer of the measurement system is deployed to measure a trace gas concentration at the point source emitter. The trace gas concentration is quantified using a peak covariance equation, wherein the peak covariance equation comprises: Fx = β0 + ∑iβixi + ∑j≠kβjxjxk wherein Fx is an emission rate, βs are regression coefficients, and x is the measured wind speed and trace gas concentrations.

The utility model provides a pyrolysis - grading catalytic experimental device belongs to heavy carbon resource thermochemical processing technical field. In the utility model, the pyrolysis zone and catalytic zone of independent temperature control are arranged along heat conduction pipe of tubular furnace, and the sample feeding assembly with double gas transmission path is inserted, the assembly includes the sample feeding inner lining pipe with material fixed recess and sealed adapter component, realizes the shunt of inner tube carrier gas and annular gap carrier gas, ensures inert atmosphere and prevents reflux. The transmission section between tubular furnace outlet and condensing device is provided with heat tracing temperature control device, prevents product condensation stagnation. Two -stage condensing device cooperates gradient cooling (ice water bath and salt ice bath), and the product grading condensation collection is optimized. The utility model solves the problem of difficult partition temperature control, poor airtightness, transmission condensation and product loss, can simulate fast heating accurately, is applicable to the pyrolysis, grading catalysis and coupling conversion experiment of heavy carbon resources such as coal, biomass, plastic, has the advantages of convenient operation, high product collection efficiency.

The application discloses a kind of gas alarm detection systems based on power bus, it is related to gas detection technical field, including first cable, second cable, controller, detector and full-bridge rectifier module;The bus output end of controller is connected with the one end of first cable and the one end of second cable respectively;The other end of first cable and the other end of second cable are commonly connected with the bus interface of detector electrically;First cable and second cable form two-wire power bus;Full-bridge rectifier module is arranged at the interface of detector and controller, so that the bus interface is non-polar.The application is from gas concentration threshold to the response delay of valve action ≤80ms, the communication error rate is less than 10-9 in 30dB strong interference environment, bus supports ≥5A peak current output, can drive high-power catalytic sensor array, detector hot plug replacement operation time is reduced;Maintenance personnel do not need special tool or circuit knowledge, the risk of misoperation is reduced.

The application relates to a device for detecting the activity of a catalyst in a light hydrocarbon catalytic cracking reaction, which comprises a precise feeding module, a multi-section temperature control reaction module and a recovery analysis module. The multi-section temperature control reaction module comprises a preheating pipe section and a reactor. One end of a feeding pipe is connected with raw materials, and the other end of the feeding pipe is connected with the inlet of the reactor through the preheating pipe section. The preheating pipe section heats the raw materials and then sends the raw materials to the reactor. The reactor comprises a reaction pipe and a loading frame. The loading frame is arranged in the reaction pipe and is provided with a plurality of densely arranged loading holes. The loading holes are suitable for loading the catalyst to be tested. The recovery analysis module comprises a three-stage condensation system and a chromatographic analyzer. The three-stage condensation system performs multi-stage condensation on the products and separates cracking gas. The chromatographic analyzer analyzes the components of the cracking gas. The application can well simulate the reaction environment with high catalyst density in the light hydrocarbon catalytic cracking reaction and accurately evaluate the activity of the catalyst in the light hydrocarbon catalytic cracking reaction.

This utility model relates to a light source replacement device in an experimental apparatus for illumination and carbon dioxide and catalyst combination. It includes: an inner support (9) of the experimental apparatus, a light source module (1), and an experimental glass test tube (10). The inner support (9) of the experimental apparatus has a two-layer structure. The experimental glass test tube (10) is inserted through the distribution holes of the upper and lower discs. The experimental glass test tube (10) is positioned and fixed at the same horizontal position. The bottom disc is designed with mounting slots (12) for light source modules of different wavelengths according to the bottom position of the experimental glass test tube (10). The light source modules (1) of different wavelengths are inserted into the mounting slots (12) of different wavelengths, so that the light-emitting end of the LED light source (5) of the light source module (1) of different wavelengths forms an optical coupling connection structure with the bottom light inlet of the experimental glass test tube (10).

The present application relates to the field of environmental catalysis and water treatment engineering, and specifically relates to a method for detecting magnetite nanoscale enzyme activity and a regeneration method thereof. The present application removes the active layer on the surface of the magnetite nanoscale enzyme by physical etching, determines the change in the Fe isotope composition of the sample before and after etching, determines the activity state of the magnetite nanoscale enzyme according to the Fe + is easy to enrich light isotopes, and Fe + is easy to enrich heavy isotopes, analyzes the distribution and migration behavior of the iron species in the inner and outer layers of the magnetite, and determines the migration of Fe + from the inside to the surface, which leads to the continuous regeneration of the active sites, and determines the activity state of the magnetite nanoscale enzyme by using the Fe isotope fractionation results, and establishes a catalyst activity judgment standard by using magnetite nanoscale enzymes in different oxidation states to realize the timely addition of Fe 2+ regenerates the active sites of the catalyst, which not only reflects the activity stability of the nanoscale enzyme in the field of water treatment and environmental remediation, but also avoids the blind addition of Fe 2+ and other pollution such as iron sludge.

The application discloses a kind of multi-channel photo-thermal integrated catalytic reactor and its working method, and the catalytic reactor includes reactor main body, which includes at least four independent reaction cavities, and catalyst support structure is arranged in the reaction cavity;Temperature control system, which includes heating furnace, the number of heating furnace is the same as the number of reaction cavities and both are one-to-one correspondence arrangement;Light excitation system, which includes laser and displacement mechanism, displacement mechanism drives laser to move between each reaction cavity, and the laser emitted by laser can penetrate into the reaction cavity;Gas supply system;Detection system.Through the arrangement of at least four independent reaction cavities, multiple independent catalytic experiments can be carried out, so that the experimental effect of catalytic reaction under different conditions can be more intuitively analyzed.Moreover, the temperature control system and the light excitation system can independently transfer heat and light energy to each reaction cavity, allowing for thermal catalysis, photocatalysis or photo-thermal catalysis experiments to achieve different experimental purposes.