391results about "Chemical analysis using catalysis" patented technology

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 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 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 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 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 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 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 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 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 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.

The invention relates to the technical field of electroanalytical chemistry testing, in particular to a photo-assisted flexible electrode, a preparation method and application, the photo-assisted flexible electrode comprises a flexible electrode body and a photocatalyst loaded on the flexible electrode body, and the regeneration rate of the photo-assisted flexible electrode is 77-100%. Compared with the prior art, the flexible electrode is coated with the semiconductor with photoresponse, light energy is introduced into the sensor according to the photocatalytic characteristic of the semiconductor, electrode surface regeneration is achieved through illumination, and electrode pollution is avoided; the light-assisted flexible electrode is connected with the work station, so that the outdoor water matrix pollutant can be rapidly detected, the environment is protected, the cost is low, the reliability is high, secondary pollution is avoided, continuous operation is realized in the water quality monitoring period, the reliability of the electrode is improved, the service life of the electrode is prolonged, and a feasible solution is provided for rapid and accurate water detection in various environments.

The invention relates to the technical field of analytical chemistry and food pharmacy detection, in particular to a rutin antioxidant activity colorimetric determination method based on a composite nano enzyme, which comprises the following steps: mixing a to-be-detected sample solution with an ABTS free radical cation working solution to carry out first reaction, so that an antioxidant substance in a sample and ABTS free radical cations are subjected to scavenging reaction; adding the composite nano enzyme, a 3, 3 ', 5, 5'-tetramethyl benzidine solution and a hydrogen peroxide solution into a system after the first reaction is completed, and initiating a second reaction; and measuring the absorbance value of the system after the second reaction under a specific wavelength, comparing the absorbance value with the standard curve obtained through the treatment in the same step, and calculating the antioxidant activity expressed by the equivalent concentration of rutin in the sample to be detected. By optimizing reaction conditions, the method provided by the invention simplifies operation steps and can provide accurate measurement results in a wider concentration range.

This invention discloses an in-situ infrared characterization cell device based on electromagnetic induction technology and its application in the structural characterization of catalytic materials. The device includes a reaction tube, an electromagnetic heating system, and an infrared spectrometer. The electromagnetic heating system includes an electromagnetic induction coil, which surrounds the outside of the reaction tube. The infrared sample to be tested is placed in the reaction tube. The device adopts a transmission-type optical path mode, where infrared light emitted by the infrared spectrometer passes through the reaction tube and is collected by an infrared detector on the other side. The electromagnetic induction in-situ infrared reaction cell of this invention can explore the structure and reaction mechanism of materials in an electromagnetic induction environment, filling a technological gap in the field of electromagnetic induction in-situ infrared characterization and possessing strong practicality and promotional value.

The invention comprises a catalyst device (1) for hydrogen isotope exchange analysis, wherein the catalyst device (1) consists of a catalyst carrier (10) and a catalyst material (20) applied to a surface (12) of the carrier (10), wherein at least the carrier surface (12) consists of an inorganic material and the catalyst material is sputtered or electrodeposited on at least a part of the surface (12) of the carrier (10). The invention further pertains to a sample vessel (100) for hydrogen isotope exchange analysis, wherein the sample vessel (100) contains one or more catalyst devices (1) according to the invention, wherein a maximum outer diameter (D) of the catalyst device (1) is smaller than a minimum inner diameter (101) of an opening of the sample vessel (100) or of the sample vessel (100) itself. The invention also foresees a method of hydrogen isotope analysis employing the sample vessel (100) and the use of the catalyst device (1) in a method of hydrogen isotope analysis.

The application relates to the technical field of catalytic experiments, and particularly discloses a pre-sulfurization catalyst reaction system and a use method, which comprises a gas supply assembly, a liquid supply assembly, a preheating assembly and a catalysis assembly, the gas supply assembly is connected with a gas channel in parallel, the preheating assembly internally comprises a front-stage spiral pipe and a rear-stage spiral pipe, the width and the length of a static liquid vaporization bin are both greater than the diameter of the front-stage spiral pipe, the bottom surface of the static liquid vaporization bin is a right angle, and a dispersion guide inclined plate is arranged in the static liquid vaporization bin; the process of optimizing the heating conversion of the gas-liquid two-phase into the gas single-phase is achieved, the influence of the unvaporized liquid drops on the catalyst is avoided or reduced, and the optimized structure satisfies the backflush function. The mode satisfies the backflush application, and the discharge channel can also recycle the liquid under the condition that the liquid injection amount is too large, various factors in the whole experimental process are considered, the selection range of the experimental parameters is expanded, and the mode has high applicability to the multi-parameter comparison experiment.

A method of simultaneously testing catalytic activity and / or selectivity of a plurality of catalyst includes coating a substrate having the plurality of catalyst with a polymer thin film having one or more reactive probes, subjecting the coated substrate to catalysis conditions corresponding to the target catalytic activity and / or selectivity, and imaging the coated substrate for the optical signal. Each reactive probe has a signaling component that generates an optical signal upon reaction of the probes with a product of the target catalytic activity and / or selectivity, thereby allowing sensing and signaling of the product of the target catalytic activity and / or selectivity. The presence of an optical signal in one or more regions of the coated substrate is indicative of catalysts of the plurality of catalyst in the one or more regions being active for the target catalytic activity and / or selectivity.

The utility model provides a catalyst effect detection device for hydrogen production from methanol reforming. The catalyst effect detection device for hydrogen production from methanol reforming includes a reactor, the interior of the reactor is fixedly connected to a fixed pipe, one end of the fixed pipe is threadedly connected to a screw plug; the connecting pipe connected to the insulation pipe is inserted into the interior of the mounting pipe through a through hole; the interior of the mounting pipe engages with a catalyst carrier, the interior of the fixed pipe is installed with an internal funnel-shaped first rubber pad, a fixing ring and a rubber ring are installed on the side wall of the mounting pipe, and the rubber ring with a triangular cross-section engages with the interior of the first rubber pad; a second rubber pad is installed on the side wall of the connecting pipe connected to the insulation pipe, and the second rubber pad contacts the inner side wall of the fixed pipe. The catalyst effect detection device for hydrogen production from methanol reforming provided by the utility model has the advantages of simple and convenient detection process, easy operation, and accelerated detection effect.

The present invention discloses an in-situ test device and a test method for catalyst reactions, which can be used for in-situ synchrotron radiation testing during the process of heterogeneous catalyst reactions and obtain high-quality X-ray absorption and X-ray diffraction spectra during the catalytic reaction process, providing basic data for further developing efficient heterogeneous catalysts. The structure of the present invention is simple, and the flow state of the reaction gas can be controlled by controlling the size of the catalyst powder sample particles, the inner diameter of the sample tube, and the flow rate of the high-pressure gas. It can be used to monitor the in-situ catalyst structure evolution law during the fixed-bed catalytic reaction process, solving the problems that the previous equipment could not reflect the true in-situ spectroscopic information of heterogeneous catalytic reactions, had poor signals, and could not simultaneously achieve multiple spectroscopic monitoring, and has important value and significance for promoting the development of heterogeneous catalysts.

The utility model discloses a humidifier and a desulfurization efficiency detection system for a dry desulfurization catalyst. The technical problems that in the prior art, the humidifying efficiency is low, and the humidifying effect is difficult to meet the requirement for extremely high humidity or low humidity are solved. The humidifier is used for humidifying gas to be desulfurized and comprises a tank body filled with water and a first heating mechanism for heating the tank body, a gas inlet and a gas outlet are formed in the tank body, the humidifier further comprises a porous filler layer, the porous filler layer is arranged below the liquid level, and the periphery of the porous filler layer is connected with the inner wall of the tank body; the atomizing mechanism is arranged above the liquid level, and the atomizing mechanism is used for atomizing water; the air inlet pipeline is connected with the air inlet and extends to the lower part of the porous filler layer, and the lower end of the air inlet pipeline is provided with air outlet holes which are arranged at intervals from top to bottom.

The utility model relates to a cracking furnace quick-plug assembly for a solid total organic carbon analyzer, which comprises an adapter and a quick-release connector, the adapter comprises a connecting pipe part and a locking part, the connecting pipe part is fixedly connected with the locking part at 90 degrees, an internal thread is arranged in the locking part and is connected with an external thread of the quick-release connector, and the quick-release connector is fixedly connected with the adapter. A pipe connecting hole used for being connected with a combustion pipe is formed in the pipe connecting part. The replacement efficiency of the combustion tube is effectively improved, and the maintenance cost is greatly saved.

The invention discloses a biogas carbon sequestration hydrogen production simulation device based on biochar catalytic action and a test method. The biogas carbon sequestration hydrogen production simulation device comprises a gas preparation and conveying system, a reaction and temperature control system and a product treatment and analysis system which are connected in sequence, the gas preparation and conveying system comprises a CH4 gas cylinder, a first flow regulator and a mixed gas tank which are sequentially connected through a guide pipe, and a CO2 gas cylinder and a second flow regulator which are sequentially connected through a guide pipe and are connected with the mixed gas tank. According to the biogas carbon sequestration hydrogen production simulation device based on the biochar catalytic action and the test method, the biogas is converted into H2 and the carbon nanomaterial by utilizing a biogas chemical vapor deposition process, the H2 can be stored as clean energy, and the carbon nanomaterial is widely applied in multiple fields due to unique physical, chemical and mechanical energy, so that the biochar catalytic action-based biogas carbon sequestration hydrogen production simulation device can be widely applied to various fields. The problem of high emission of CO2 in the traditional anaerobic digestion and biogas treatment process is solved, meanwhile, carbon recycling is achieved, and high economic value is shown.

The invention provides a 24-hour urine total nitrogen automatic measuring device, which comprises an automatic urine collection module, which is used for continuously introducing urine of a patient into a disposable collection bag in a closed-loop path and homogenizing and weighing the urine in the bag; the automatic sampling module is communicated with a liquid path of the automatic urine collecting module and is used for extracting the homogenized urine in a creeping manner and injecting a sample with a fixed volume into the reaction cabin; the nitrogenous organic matter conversion and ammonia gas measurement module is hermetically connected to the downstream of the automatic sampling module and is used for completely converting a nitrogen source in the sample into ammonia gas and detecting the mass concentration of the ammonia gas in real time; the interaction and total nitrogen calculation module is in signal connection with the three modules and is used for receiving the ammonia gas mass concentration data and automatically calculating and outputting a total nitrogen result of urine by combining the ammonia gas mass concentration data with the 24-hour urine volume; the collection module, the sampling module and the conversion and measurement module are sequentially connected according to the flow direction of urine, and the interaction and total nitrogen calculation module performs cross-module control and synchronizes data to form a closed-loop full-automatic detection path.

The present invention discloses a multifunctional coal gas fine desulfurization catalyst / adsorbent performance evaluation device and method, belonging to the technical field of coal gas fine desulfurization. The device of the present invention includes a coal gas purification system, a regeneration and analysis gas system, a purge and release system, a reaction parameter monitoring system and an automatic control system. The system flow path is reorganized by controlling the valve switch through the automatic control system, and the design of the hydrolysis and adsorption integrated tower is used to realize the switching of two mainstream coal gas fine desulfurization processes. It has the function of evaluating the effects of various types of fine desulfurization catalysts and adsorbents under the conditions of two fine desulfurization processes, and the function of evaluating the effect of coal gas organic sulfur hydrolysis catalyst and the desulfurization efficiency of the whole process of fine desulfurization process. It also has the function of analyzing and exploring the optimal process range of fine desulfurization catalysts and adsorbents under different fine desulfurization processes and different coal gas conditions.

The utility model discloses a small-scale test device for evaluating a fixed bed catalyst, which comprises a gas feeding unit, a catalytic reaction unit, a synthetic reaction unit, a product collecting unit and a product online analysis unit, materials in the gas feeding unit are synthesized through the catalytic reaction unit or the synthesis reaction unit, then effectively separated through the product collection unit and finally detected through the product online analysis unit, and the catalytic reaction unit or the synthesis reaction unit adopts a double-channel double-temperature-control mode. And transverse contrast test is realized through different reaction temperature control modes, so that a catalytic reaction and a synthetic reaction of reactants at proper temperature and pressure are ensured, and the reaction efficiency and the product quality are improved.