524results about "Chemical analysis using catalysis" patented technology

The invention relates to a durability test method and device, electronic equipment and a readable storage medium, the durability test method is used for testing the durability of an electrolytic catalyst, and the test method comprises the following steps: obtaining first test data of a to-be-tested electrolytic cell; a catalyst is arranged in the to-be-detected electrolytic cell; performing target working condition testing on the to-be-tested electrolytic cell according to the operation data of the power supply; acquiring second test data after the to-be-tested electrolytic cell is subjected to the target working condition test; and obtaining the durability of the catalyst according to the first test data and the second test data. The specific power supply parameters in the target working condition test are determined based on the operation data of the power supply, and the condition of the to-be-tested electrolytic cell in the real working condition can be simulated, so that the durability test result is closer to the real use scene, and the durability test reliability is greatly improved.

The invention discloses a catalyst determination method and device and a machine readable storage medium, and relates to the technical field of weather modification. The method comprises the steps that index values of test indexes of a plurality of different types of catalyst samples are obtained respectively, and the index values are the index values of the catalyst samples tested in a preset strong freezing rain simulation environment; the freezing rain key condition is reproduced through the simulation platform, and the deviation between a traditional laboratory and a real scene is overcome. Determining the weight of each test index based on all index values and a weight distribution algorithm; aiming at each type of catalyst samples, based on a multi-criterion decision algorithm and the index value and the weight of each test index, determining an evaluation score of the catalyst samples; and determining the catalyst sample with the highest evaluation score as a target catalyst. By scientifically and comprehensively evaluating the performance of different types of catalysts, a scientific basis is provided for selection and application of the catalysts, and the freezing rain disaster prevention and control cost is reduced.

The present invention relates to a contact combustion gas sensor provided with a coil-exposed detection element for detecting flammable gas leakage, and a method for manufacturing the same, the contact combustion gas sensor being provided with a detection element (210) that reacts with contact gas and a compensation element (260) that does not react with contact gas, the detection element (210) comprising a coil wire (222) and a thermal block (240), the coil wire (222) has a coil shape, an exposed portion of the coil wire (222) that is in direct contact with the outside air performs a direct catalyst combustion reaction with gas in contact with the outside air, and the thermal block (240) is disposed inside the coil wire (222), and a portion of the thermal block (240) is coupled to the coil wire (222) to support the coil wire (222).

The invention provides a multi-temperature-zone variable-working-condition ortho-parahydrogen continuous catalytic conversion characteristic test system and method, and relates to the technical field of ultralow temperature. The system comprises a test device used for cooling raw material hydrogen to a first temperature zone, then cooling the raw material hydrogen to a second temperature zone through an ortho-parahydrogen conversion heat exchanger and converting ortho-hydrogen in the raw material hydrogen into parahydrogen; the control analysis device is used for providing raw material hydrogen, providing a cold source and detecting and analyzing the parahydrogen content in the gas before and after conversion of the ortho-parahydrogen conversion heat exchanger; the auxiliary device is used for providing a high-vacuum environment required by low temperature for the test; the ortho-parahydrogen conversion heat exchanger can take away conversion heat generated in the conversion process while promoting conversion from ortho-hydrogen to parahydrogen; the control analysis device can adjust the proportion of ortho-hydrogen and parahydrogen in the raw material hydrogen. The method applies the system. The continuous catalytic conversion performance and heat exchange performance of the ortho-parahydrogen conversion heat exchanger under different working conditions are explored by adjusting the ortho-parahydrogen content in the raw material hydrogen.

The invention relates to a microfluidic reactor for electrocatalytic determination of chemical oxygen demand, and belongs to the field of environmental monitoring. In the reactor, to-be-detected samples are injected from a sample inlet positioned at the front end of a liquid inlet and flow into the reactor formed by stacking three layers of components from the liquid inlet below along with electrolyte, and the to-be-detected samples positioned at different horizontal heights turn along with liquid flow and finally reach the surface of a planar anode at the bottom under the action of a pinch plate distributed with a micro cone group; and the water flows upwards through a hole in one end of the top side of the buckle plate, passes through the auxiliary electrode with the hole and finally flows out of the electrolytic tank through a water outlet in the top. Organic matters in the to-be-detected sample are subjected to electrochemical oxidation reaction under the action of the catalyst on the surface of the planar anode at the bottom of the reactor, and a generated electric signal is used for quantitatively determining the chemical oxygen demand of the to-be-detected water sample. In the invention, the pinch plate distributed with the micro cone group can strengthen organic matters to break through stable horizontal laminar mass transfer, so that the organic matters in the sample to be detected fully reach the surface of the plane anode to generate electrochemical oxidation reaction, thereby improving electric signals and lower limit of detection. According to the characteristics, a more stable and accurate electric signal can be obtained when the reactor is used for measuring the chemical oxygen demand, and the linear range of the measurement is widened, so that the efficient and accurate measurement of the chemical oxygen demand in a sample to be measured is realized.

The invention discloses a quantitative evaluation method for an electrically enhanced catalytic action in electrothermal catalysis. According to the method, the catalytic activity of the structured catalyst in a'resistance internal heating 'reaction mode is considered to be composed of two parts, namely thermal contribution and electric strengthening contribution, and the weight of the thermal contribution can be quantitatively measured and calculated according to the temperature distribution of the structured catalyst under electric heating and the catalytic activity-temperature incidence relation under conventional external heating. And the electric strengthening contribution is indirectly obtained. The method provided by the invention provides a new quantitative index for analyzing the electro-thermal catalytic reaction process, is not limited by catalyst types and reaction types, can be used for comparative research of a cross-catalytic material system and a cross-reaction system, and has important guiding significance for rational design of an efficient electro-thermal catalyst.

The invention belongs to the technical field of dry pulverized coal gasifiers, and discloses an experimental method for CaO to catalyze high-temperature coke high-pressure gasification reaction under different atmospheres, which comprises the following specific steps: step 1, preparing experimental raw materials and pretreating to select representative coal types; the diffusion environment of the industrial gasifier is simulated by establishing a cooperative regulation and control mechanism of pressure, gas velocity and pore structure, the thickness of a boundary layer is calculated according to the Fick diffusion law, a diffusion resistance quantitative relational expression is constructed for dynamic correction, and a variable diffusion strength experimental group is designed to quantify diffusion contribution. The diffusion and reaction rate ratio is quantitatively evaluated through a Weber number model, a catalysis and blank control synchronous experiment is carried out at the same time, a catalysis efficiency factor is calculated, a catalysis-diffusion synergistic phase diagram is drawn, and a reaction control region, a diffusion control region and a transition region are definitely defined; and the risk that the reaction stagnation caused by the fact that the high-pressure diffusion retardation effect is misjudged as catalytic activity attenuation or pore collapse is mistakenly attributed to catalyst deactivation is eliminated.

The invention relates to the field of emergency rescue investigation, and discloses a gas concentration and two-dimensional map correlation detection system and method, and the system comprises a map mapping unmanned aerial vehicle, an environment detection unmanned vehicle, a cloud platform, and platform software. And the platform software is used for reading the two-dimensional live-action map from the cloud platform and transmitting the read two-dimensional live-action map to a remote ground command center for display. The system can solve the problem that in outdoor typical post-disaster scenes, such as flammable and explosive, toxic, oxygen-deficient, dense-smoke and high-temperature scenes, the system can be used for carrying out real-time monitoring on the scene; the system can replace emergency rescue workers to enter a dangerous chemical gas site to carry out correlation detection on the gas concentration and a two-dimensional map, so that the efficiency can be improved for formulating an emergency rescue strategy path on site to evaluate post-disaster toxic and harmful gas monitoring, and the casualty risk of the emergency rescue workers is greatly reduced.

The invention belongs to the technical field of diesel engine emission reduction, and particularly relates to a diesel engine nitrogen oxide reducing agent PN emission characteristic test system and test method. The diesel engine nitrogen oxide reducing agent PN emission characteristic test system comprises a combustor, a filter, a mixing pipe, an SCR catalyst and an ASC catalyst which are communicated in sequence. The combustor is used for introducing fuel and carrying out combustion reaction; the filter is used for filtering upstream particulate matters generated by combustion reaction; the mixing pipe is used for introducing a nitrogen oxide reducing agent and a simulation gas component, and is used for mixing the filtered combustion product, the nitrogen oxide reducing agent and the simulation gas component to form a mixed gas; the SCR catalyst is used for promoting a catalytic reduction reaction of the mixed gas; the ASC catalyst is used for carrying out ammoxidation reaction; and a downstream particle counter is arranged at an outlet of the ASC catalytic converter. By using the PN emission characteristic test system for the nitrogen oxide reducing agent of the diesel engine in the technical scheme, the particulate matter emission level of the nitrogen oxide reducing agent of the diesel engine can be tested.

The invention discloses a method for detecting glucose on the basis of cascade catalysis of cerium dioxide / gold nano cluster-Prussian blue nano enzyme (AuNCs-CeO-HMPB). The material is prepared by compounding cerium dioxide (CeO) with similar glucose oxidase activity and hollow Prussian blue nanoparticles (AuNCs-HMPB) modified by gold nanoclusters with similar peroxidase activity through a hydrothermal assembly method. In the presence of glucose, CeO catalyzes oxidation of glucose to generate gluconic acid and H2O2, then AuNCs-HMPB synergistically catalyzes decomposition of newly generated H2O2 to generate high active oxygen species, further a colorless 3, 3 ', 5, 5'-tetramethyl benzidine (TMB) color developing agent is oxidized to generate obvious color change, and based on the cascade catalytic reaction, the enzyme-free glucose colorimetric sensor is successfully constructed. The sensor shows excellent detection performance on glucose under optimized conditions (pH = 4.0, 50 DEG C), the linear detection range is 10.00-90.00 [mu] mol / L, and the detection limit is 2.1 [mu] mol / L (S / N = 3).

The invention belongs to the technical field of nano material application and chemical detection, and particularly discloses a method and a kit for detecting the content of D-amino acid based on a Pt / Ti3C2Tx nano material and application of the method and the kit. The method comprises the following steps: incubating a sample to be detected and D-amino acid oxidase together; after the incubation is completed, adding a Pt / Ti < 3 > C < 2 > T < x > nano material and a chromogenic substrate TMB (Tetramethylbenzidine), and reacting under laser irradiation; and after the reaction is finished, determining the content of D-amino acid by a colorimetric detection method. The kit comprises D-amino acid oxidase, a Pt / Ti < 3 > C < 2 > T < x > nanometer material and TMB (Tetramethylbenzidine). The Pt / Ti < 3 > C < 2 > T < x > nanometer material has local surface plasma resonance effect and peroxidase-like catalytic activity, a colorimetric detection platform constructed based on the Pt / Ti < 3 > C < 2 > T < x > nanometer material is applied to clinical saliva sample detection, has the characteristics of high sensitivity, high selectivity and the like, and can provide a rapid, simple and painless new path for early screening of gastric cancer.

The invention provides a catalytic combustion testing device and a catalytic combustion testing method for an SOFC (Solid Oxide Fuel Cell), and belongs to the field of solid oxide fuel cells. Comprising a fan, a heat exchanger, a mixing pipeline, a combustor, a heating device and an observation device. Wherein the outlet end of the fan is connected with a cold stream inlet of the heat exchanger, a cold stream outlet of the heat exchanger is connected with one end of the combustor through the mixing pipeline, the mixing pipeline is provided with a gas connecting pipe, a catalyst carrier is arranged in the combustor, and the other end of the combustor is connected with a hot stream inlet of the heat exchanger. A carrier temperature sensor connected with the catalyst carrier is arranged on the combustor, the heating device is connected with the combustor, pressure sensors and temperature sensors are arranged at the two ends of the combustor, and the observation device is connected with an inner cavity of the combustor. The actual working conditions of combustors in SOFC systems of different specifications can be simply and quickly simulated, and the performance verification test of the catalyst is realized.

The invention belongs to the field of environmental protection, analysis and detection, and relates to a composite catalyst for a total organic carbon tester, and a preparation method, a use method and application thereof. The composite catalyst comprises a carrier-loaded core-shell type catalyst, wherein the core-shell type catalyst comprises a high-entropy oxide shell and a platinum nano core wrapped by the high-entropy oxide shell; the core-shell type catalyst is uniformly distributed on the carrier; the metal elements in the high-entropy oxide shell comprise four elements of Mn, Cr, Ce and Fe, and any one or more of three elements of Co, Ni and Ru. The core-shell structure protects the platinum noble metal in the inner core and enhances the stability and the core durability of the platinum noble metal, the high-entropy oxide shell effectively inhibits diffusion and phase change of crystals, enhances the thermal stability and the sintering resistance of the catalyst and improves the poisoning resistance and the corrosion resistance, and due to the synergistic effect of multiple elements, the performance is far better than that of linear superposition of a single component.

The invention provides an adsorption reaction dynamic performance testing and evaluating device and a testing method.The testing and evaluating device comprises a gas supply module, a temperature control module and an adsorber module which are sequentially connected through a pipeline in the gas trend, and the inlet end and the outlet end of the adsorber module are connected with the same detection and analysis module; the outlet end of the detection analysis module is connected with an artificial intelligence control module. Through combined arrangement of all the modules, the adsorption performance of the adsorbent under a dynamic adsorption test can be tested and evaluated, a more accurate experimental basis is provided for design and development of actual industrial adsorbents and other porous media, and the test and evaluation device can also be expanded to research of a catalytic reaction process in a fixed bed reactor and has a wide application prospect. And testing and evaluation of the reaction kinetic model are realized.

The invention relates to a diatomic catalyst for detecting carbosulfan pesticide residue and a preparation method, and belongs to the technical field of food safety detection. According to the invention, a reducing sulfide generated by breaking a nitrogen-sulfur (N-S) bond of carbosulfan under an acidic condition is used as a specific substance. The reductive sulfide not only can prevent bimetal active sites in the diatomic catalyst, but also consumes hydroxyl radicals generated by catalyzing hydrogen peroxide (H2O2), and the sensing switch enzyme formed by a dual enzyme inhibition mechanism causes the enzyme substrate 3, 4-dihydroxyl-3, 4-dione to be converted into the diatomic catalyst, so that the catalytic activity of the diatomic catalyst is improved. The blue color of the 3, 3 ', 5, 5'-tetramethyl benzidine (TMB) gradually becomes light along with the increase of the concentration of carbosulfan, sensitive visual detection is implemented, and after a blue product is read by using an ultraviolet spectrophotometer, the absorbance value generated by an ultraviolet absorption spectrum at 654 nm is linearly dependent on carbosulfan. The prepared diatomic catalyst effectively improves the detection sensitivity of the carbosulfan pesticide residue, and has good popularization and application prospects.

The invention relates to the technical field of detection, in particular to a sensing element and a preparation method thereof, a gas sensing device and an isobutanol detection method. The sensing element comprises a base body and a coating arranged on the surface of the base body, and the coating comprises MgO and SiO2 (silicon dioxide). The gas sensing device of the present invention comprises: a reaction chamber; a heating base and the sensing element are arranged in the reaction chamber; and the sensing element is flatly placed on the heating base. The isobutanol detection method comprises the step of detecting the gas to be detected by adopting the gas sensing device. According to the sensing element provided by the invention, isobutanol can be rapidly detected with high sensitivity and high selectivity based on the MgO-SiO2 coating, the anti-interference capability is strong, and the precision is high; the gas sensing device adopting the sensing element can accurately monitor isobutanol on line for a long time.

The present invention relates to a total nitrogen concentration measurement method for water quality. The method comprises: (1) adding a water sample, a K2S2O8 solution and a NaOH solution into a digestion tank, and carrying out digestion and oxidation in the digestion tank; (2) adding a H4N2H2SO4 solution and a catalyst into a digestion solution for reduction reaction; (3) adding a mixed reduction solution into a color development reagent, generating a red dye, and obtaining a color development solution; and (4) taking the color development solution, using a light source having a wavelength of 540 nm to carry out ADC signal measurement, recording an ADCx signal value, and calculating the total nitrogen concentration of the water sample to be measured. According to the total nitrogen concentration measurement method for water quality provided by the present invention, measurement conditions are easily realized for an online monitoring instrument; special anti-interference treatment is carried out on an actual water sample, thereby ensuring the accuracy of measured data; and the light source is used for calibration and compensation, thereby improving the accuracy, and further optimizing the online instrument monitoring process for water quality.

The utility model relates to a gaseous pollutant adsorption and desorption and catalysis evaluation system for a solid adsorbent / catalyst. The gaseous pollutant adsorption and desorption and catalysis evaluation system comprises a pollutant gasification unit, a fixed bed adsorption and desorption / catalysis unit and a tail gas detection unit, a first heat preservation box is arranged between the pollutant gasification unit and the fixed bed adsorption and desorption / catalysis unit. The device disclosed by the utility model has the beneficial effects that the gasification of liquid and solid pollutants at normal temperature is realized through the pollutant gasification unit, so that the adsorption and desorption / catalytic performance test of the gasified pollutants by an adsorbent / catalyst can be carried out; three gas paths are arranged in front of a pollutant gasification unit, so that various gaseous pollutants are uniformly mixed, the gas concentration is adjusted, and the high-temperature working condition in the actual application process is simulated; the high-temperature three-way valve controls airflow to flow into the fixed bed adsorption and desorption / catalysis unit or the tail gas absorption device, initial concentration of pollutants can be read and calibrated conveniently, the inner wall of the pipeline is filled with an adsorbent or a catalyst after adsorption saturation, and test errors are effectively reduced.

The present invention relates to the field of photocatalyst detection technology, and specifically to a photocatalyst degradation performance detection system and method, the system comprising a detection unit, the detection unit being provided with an inlet and an outlet, the outlet and the inlet of the detection unit being provided with a pollutant concentration detection module, the pollutant concentration detection module being used to detect the concentration of pollutants passing through; and also comprising a processing module, the processing module being used to obtain and record pollutant concentration data detected by the pollutant concentration detection module, control the operation of an ultraviolet light source component, a driving component and a temperature control component, and calculate the pollutant degradation performance of the photocatalyst under multiple groups of different lighting conditions and different detection environment temperature conditions. The present invention can synchronously obtain the pollutant degradation performance results of multiple groups of photocatalysts under different lighting conditions and different detection environment temperature conditions. The convenience of photocatalyst degradation performance detection and the efficiency of photocatalyst degradation performance detection are improved.

The invention discloses a multi-channel ortho-parahydrogen conversion catalyst evaluation device. The device comprises a hydrogen generation and purification system, a nitrogen purging system and a pipeline vacuum system which are connected in parallel, the three are sequentially connected with a catalytic conversion system and a parahydrogen detection system after being connected in parallel; the catalytic conversion system is also connected with the tail gas treatment system; the ortho-parahydrogen catalytic conversion device with a multi-path simultaneous activation function is built for the first time, activation treatment of four catalysts can be achieved at the same time, then ortho-parahydrogen catalytic conversion performance evaluation is conducted in batches, and the efficiency of catalytic performance testing is greatly improved; by measuring the peak height of the parahydrogen spectrum in the gas chromatograph, the concentration of the parahydrogen can be accurately calculated.

The utility model relates to a device for measuring a reforming catalyst for partial oxidation of ammonia gas. The device comprises a porous main body with a catalyst, a sealing cover, a tail gas outlet, a gas cavity, an ammonia gas and air mixed gas inlet and a heating device, the porous main body is mounted in the reaction cavity; the tail gas outlet is detachably mounted at the lower part of the reaction cavity and is communicated with the reaction cavity; the sealing cover detachably covers the upper part of the reaction cavity; the ammonia and air mixed gas inlet is communicated with the gas cavity, the reaction cavity is mounted in the gas cavity, and the gas inlet hole group is communicated with the gas cavity; a heating device is located in the porous body. The device has the advantages of being simple in structure and easy to disassemble and clean; the device can be repeatedly used, and different catalysts can be conveniently tested.

The invention discloses an NMR (nuclear magnetic resonance) method for characterizing solid catalyst acid pair evolution and application, which comprises the following steps: selecting double-ended 1, 2-bis (dimethyl phosphine) ethane (DMPE) as a probe molecule, taking a solid catalyst molecular sieve as an example, and carrying out a series of advanced one-dimensional and two-dimensional homonuclear / heteronuclear related NMR detection; through systematic analysis of experimental results, spatial interaction information among different acid centers is obtained, direct evidence of acid pair evolution is obtained, the problem that the evolution of acid pairs in the solid catalyst is difficult to accurately characterize by the conventional experimental means is mainly solved, and understanding and understanding of a concerted catalytic reaction mechanism of the acid pairs in the solid catalyst can be deepened. The method is easy to operate, accurate in result and suitable for identifying acid pairs in various solid catalysts such as molecular sieves, oxides and heteropoly acid.

The present invention relates to a method for characterizing oxygen species adsorbed by an ethylene epoxidation catalyst, and to the technical field of catalyst characterization and detection. The method for characterizing oxygen species adsorbed by an ethylene epoxidation catalyst comprises the following steps: pretreating the ethylene epoxidation catalyst with a mixed gas of ethylene / oxygen / helium; adsorbing oxygen on the pretreated ethylene epoxidation catalyst with oxygen, etc. The present invention effectively removes incompletely decomposed Ag precursors by adopting an in-situ reaction induction method in the pretreatment stage of the catalyst. Subsequently, an oxygen adsorption experiment is performed on the Ag catalyst pretreated in situ, and oxygen and other gas phase products generated by programmed temperature desorption are detected by mass spectrometry to detect the composition and characteristics of the ethylene epoxidation catalyst, thereby reducing the interference of Ag precursor salts without increasing the reaction temperature, thereby accurately judging the oxygen active species on the surface of the Ag catalyst.

The present invention belongs to the technical field of pharmacological and toxicological analysis of small molecule compounds, and specifically discloses a method for single-molecule manipulation detection of in vitro drug metabolizing enzyme-catalyzed DNA adduct formation, comprising the steps of: a) fixing a double-stranded DNA molecule between a fixed surface and a movable surface; b) mechanical stretching to measure the length of the double-stranded DNA molecule; c) applying a reaction solution containing a small molecule compound and a drug metabolizing enzyme component, and reacting; d) washing away the small molecule compound and the drug metabolizing enzyme component; e) mechanical stretching to detect the change in the length of the double-stranded DNA, thereby judging whether the small molecule compound forms an embedded adduct with DNA based on the change in length, or judging the amount and / or reaction kinetics of the embedded adduct formed by the small molecule compound and DNA. The present invention uses a single-molecule mechanical manipulation method to detect the amount and reaction kinetics of the embedded adduct formed by the drug metabolizing enzyme-catalyzed small molecule compound and DNA.

The invention discloses an on-site catalyst evaluation system and method based on surface detection, and belongs to the technical field of flue gas treatment. According to the technical scheme, the field catalyst evaluation system based on surface detection comprises a gas inlet atmosphere modulation module, a reactor module, a gas detection module and a tail gas treatment module which are connected in sequence; the gas inlet atmosphere modulation module comprises a gas inlet flue, a gas inlet stop valve, a gas inlet adjusting valve, a flue gas mixer, a modulation gas pipeline, a modulation gas stop valve and a modulation gas mass flow meter; the high-density sensor array and the optical imaging unit are combined with a spatial interpolation algorithm to generate an efficiency distribution heat map, real-time monitoring of surface activity distribution of the catalyst is achieved, through parallel testing of multiple reactor components and machine learning life prediction, the evaluation precision and research and development efficiency of the catalyst are remarkably improved, and the research and development cost is lowered. The method has the advantages that the catalyst surface efficiency heterogeneity is captured in real time, multi-channel accelerated testing is supported, and the service life is accurately predicted.

The invention discloses a method for rapidly determining the optimal DSC sample amount to predict the thermal safety parameter of an autocatalytic substance. The method comprises the following steps: firstly, setting more than three groups of sample masses, carrying out a thermal decomposition test on the samples under a dynamic condition by using DSC to obtain initial decomposition temperatures T0, specific heat release amounts Q and peak temperatures Tp of the samples under different sample amounts, and analyzing the correlation between T0, Tp and Q and the sample amounts according to the change ranges and change trends of three thermodynamic parameters, if the thermodynamic parameters do not change obviously, selecting the maximum sample mass as a relatively conservative thermal safety parameter for predicting the optimal sample mass, and if the thermodynamic parameters change obviously, further comparing delta Y / delta X by taking the sample mass as an X variable and the thermodynamic parameters as a Y variable, and screening out the optimal sample mass in combination with different classification conditions. The method has the advantages of simple test conditions and short time consumption, can be widely applied to various autocatalytic substances, and can obtain more conservative and accurate evaluation results.

The invention provides an on-line catalysis evaluation device and method for a small reactor for producing hydrogen through catalytic cracking of methane. The on-line catalysis evaluation device comprises a feeding unit, a reaction unit, a condensation drying unit and a metering analysis unit which are connected in sequence, the reaction unit comprises a small reactor, the condensation drying unit comprises a condenser and a dryer which are communicated with each other, and the metering analysis unit comprises a wet flow meter; an inlet of the small reactor is connected with an outlet of the feeding unit, an outlet of the small reactor is connected with an inlet of the condenser, an outlet of the condenser is connected with an inlet of the dryer, and an outlet of the dryer is connected with an inlet of the wet flow meter; wherein the small reactor comprises a tubular reactor and an electric heating furnace arranged on the periphery of the tubular reactor, a gas distributor is arranged at the inlet end of the tubular reactor, and according to the on-line catalysis evaluation device and method for the small reactor for hydrogen production through methane catalytic cracking, the catalysis evaluation of the methane catalytic cracking reaction is accurate, rapid and efficient.

The invention provides a method for judging the inactivation temperature and the inactivation characteristic of a hydroformylation catalyst. The method comprises the following steps: S1, preparing a hydroformylation reaction solution; s2, measuring the reaction liquid, filling the reaction liquid into an adiabatic test instrument to simulate a hydroformylation reaction, and when the temperature is increased to T0, stopping heating and carrying out an adiabatic reaction; recording the temperature change, and obtaining the highest temperature Tm; s3, cooling the test ball, taking out half of a reaction material, adding a hydroformylation reaction raw material, heating to simulate a hydroformylation reaction, stopping heating when the temperature is increased to T1, carrying out an adiabatic reaction, and recording the highest temperature Tmf; s4, comparing T1, Tm and Tmf; if Tmf is equal to T1, the inactivation temperature of the catalyst is Tm, and irreversible inactivation is carried out; if Tmf is equal to Tm, the inactivation temperature of the catalyst is Tm, and reversible inactivation is carried out; if Tmfgt; and Tm, taking out the material in the test ball, and repeating the steps S2-S4. The judgment method disclosed by the invention is short in test period and high in safety, does not need separation and component analysis on a test sample, and has guiding significance on catalyst operation upper limit and homogeneous catalyst recovery temperature selection research.

The invention discloses an application of a sensing array based on an MOF-818 nano enzyme in polyphenol substance detection, and the sensing array based on the MOF-818 nano enzyme is composed of an MOF-818-1 nano enzyme prepared by a one-step solvothermal method and an MOF-818-2 nano enzyme prepared by a two-step solvothermal method, the polyphenol substance is a single polyphenol or a mixture of more than two polyphenols. The method has the advantages of high distinguishing capability, high information dimension, high detection efficiency, low detection cost, good polyphenol detection sensitivity, wide linear range (10-800 [mu] M) and reliable detection result, can be applied to analysis of actual samples such as chrysanthemum extract and the like, and has wide application prospect, and the identification capability of polyphenol with similar structures is improved. The method has the advantages of high distinguishing capability, high information dimension, high detection efficiency, low detection cost, high polyphenol detection sensitivity, wide linear range (10-800 [mu] M) and reliable detection result. And good practicability is proved.

The invention relates to the technical field of three-way catalysis testing, and discloses a three-way catalysis high-low temperature anti-aging testing machine and a testing method thereof, and the three-way catalysis high-low temperature anti-aging testing machine comprises a testing machine body, a monitoring pipe, a channel group, a driving assembly, a sealing assembly, a transposition monitoring assembly and a stirring assembly. By arranging the normally open channel and the three surrounding channels with different functions, multi-dimensional gas detection is achieved, and data of gas catalyzed by the three-way catalyst under different working conditions can be comprehensively obtained. The channel I is used for detecting static gas and analyzing a stable working condition catalytic effect; a unique transposition monitoring assembly of the second channel enables a detection probe to stir gas in a multi-angle mode through spiral sliding rods with different rotating directions, and multi-element catalytic performance data are obtained; the third channel simulates a complex airflow environment to detect non-static stirring gas. By means of the design, the automation degree of the testing process is high, all the assemblies cooperate to achieve rapid detection state switching, and the accuracy of evaluating the high-low-temperature anti-aging performance of the three-way catalyst is remarkably improved through comprehensive data collection.