533 results about "Carbon monoxide" patented technology

The invention discloses a denitration system inlet nitric oxide disturbance and super-emission control method and system, and the method comprises the steps: adjusting the operation oxygen amount and the over fire air ratio in real time based on the measured values of the carbon monoxide concentration and the nitric oxide concentration of the denitration system inlet; based on denitration system operation data, combining actual sampling delay time to carry out sample data alignment and construct a training sample set; constructing a prediction model based on the training sample set, obtaining a nitrogen oxide concentration prediction value of the inlet of the denitration system through the prediction model, and updating the prediction model in real time; based on the difference between the average value of the outlet nitrogen oxide concentration of each partition and a set value and the difference between the concentration value of the nitrogen oxide at the outlet of the denitration system and the set value, and by combining the predicted value of the nitrogen oxide concentration at the inlet of the denitration system, treatment measures after the nitrogen oxide concentration super-emission are set in a segmented mode. The control performance of the denitration system can be improved, the ammonia spraying amount is reduced, the ammonia escape concentration is reduced, and the system automation input rate is increased.

The invention discloses an intelligent building fire monitoring method, and relates to the field of building fire monitoring, and the method comprises the steps: collecting three types of fire characterization parameters: temperature, smoke concentration and carbon monoxide concentration; the method comprises the following steps: acquiring fire characterization parameters of each node at an initial frequency, comparing the fire characterization parameters to trigger primary warning, then increasing the acquisition frequency for a primary warning node and adjacent nodes, and continuously acquiring multiple groups of data; fire source initial coordinates are determined through positioning anchor points and parameter gradient differences, the coordinate range is continuously corrected, and specific fire source position coordinates are provided; and dynamically generating a fire diffusion path according to the smoke diffusion path of the monitoring node in the fire source coordinate range, tracking the fire diffusion path and providing diffusion direction prediction. The accuracy and timeliness of intelligent building fire monitoring are improved, the quick response to fire dangerous cases is facilitated, and the safety of buildings and personnel is guaranteed.

The invention relates to the technical field of carbon monoxide concentration detection, in particular to an industrial flue gas carbon monoxide concentration detection device which comprises an industrial flue gas detection mobile device, and a carbon monoxide concentration infrared detection device and a data analysis processing device are arranged above the industrial flue gas detection mobile device. The device has the beneficial effects that the comprehensive sealing plate is arranged in the flue gas suction probe, the particulate matter treatment frames are matched to guide gas by utilizing a streamline fin-shaped structure, and based on the inertia principle, large particulate matters deviate from a main stream and are pushed and dispersed to particulate matter diversion grooves on the two sides of an airflow particle separation guide sheet; small particulate matters are filtered by the filter disc, and then the gas is guided and dispersed in the heat dissipation and cooling process through the particulate matter treatment frame and is in contact with the water absorption silica gel pad, so that most of moisture can be absorbed, and the aim of pretreating the industrial flue gas in the flue gas suction probe sampling process is fulfilled.

The invention belongs to the technical field of antibiosis and wound healing promotion, and relates to double-response (near-infrared light and hydrogen peroxide double-response photo-thermal / carbon monoxide therapy) antibacterial hydrogel as well as preparation and application thereof. The invention relates to a double-response antibacterial hydrogel. The antibacterial hydrogel is prepared from the following components: drug-loaded nano particles and a hydrogel matrix. The drug-loaded nano particles are prepared by loading dimanganese decacarbonyl (MnCO) into cavities of hollow mesoporous copper sulphide nano particles (HMCuS NPs) and coating the surfaces of the particles with a polydopamine layer (PDA). According to the invention, CO / PTT synergistic treatment of bacterial infected wounds is realized, and the antibacterial effect is significantly improved. An in-vitro antibacterial experiment result shows that the antibacterial hydrogel shows extremely strong inhibition capability on escherichia coli and staphylococcus aureus, and the problem of drug resistance caused by a bacterial biofilm is effectively solved.

The invention discloses clostridium and application thereof in fermentation production of alcohol, and belongs to the technical field of industrial microorganisms. The clostridium is a carbon monoxide eating clostridium strain GG6, and is preserved in the China General Microbiological Culture Collection Center (CGMCC), the preservation number is CGMCC No.34975, and the preservation time is June 23, 2025. The clostridium is a carbon monoxide eating clostridium strain GG6 which is preserved in the China General Microbiological Culture Collection Center (CGMCC), the preservation number is CGMCC No.34975, and the preservation number is CGMCC No.34975. The carbon monoxide eating clostridium GG6 is obtained by enriching tail gas flue sediments of a coal chemical plant through an abundant culture medium, evolving a screening culture medium and sorting single bacteria, the bacterial strain is fermented by taking synthesis gas (CO / H2 / CO2) as raw material gas to generate acetic acid, ethanol, butyric acid and butanol, the thallus biomass OD600 is more than or equal to 6, the concentration of produced ethanol is more than or equal to 10g / L, the concentration of produced butanol is more than or equal to 2.5 g / L, and the concentration of produced butanol is more than or equal to 2.5 g / L; and commercialized implementation of butanol production through gas fermentation is facilitated.

The invention discloses a method for preparing a carbon monoxide oxidation catalyst by using titanium gypsum and a waste hydrogenation catalyst, which comprises the following steps: crushing and pickling the waste hydrogenation catalyst, washing with clear water until the waste hydrogenation catalyst is neutral, and drying to obtain pretreated waste catalytic powder; uniformly mixing and stirring titanium gypsum and the pretreated waste catalytic powder to obtain gypsum doped pretreated waste catalytic powder; mixing a plant extract, crop powder and gypsum, doping the pretreated waste catalytic powder, uniformly stirring, feeding into mixed bacteria consisting of bacillus and aspergillus, and fermenting under a stirring condition to obtain a biological activated mixture; adding water into the biological activation mixture for hydrothermal reaction, filtering, separating and washing the material after the hydrothermal reaction is finished, roasting the washed filter cake, naturally cooling the roasted material, and crushing to obtain the carbon monoxide oxidation catalyst. According to the invention, the titanium gypsum and the waste hydrogenation catalyst are combined, and the biomass material is used for activating treatment, so that the use of chemical precursors is reduced, and the oxidation catalyst with excellent catalytic performance is obtained.

The invention discloses a method for preparing a carbon monoxide normal-temperature oxidation catalyst by using electrolytic manganese residues and oil sludge, which comprises the following steps: uniformly mixing the oil sludge and the electrolytic manganese residues to obtain manganese oil sludge, uniformly stirring the manganese oil sludge and mixed halophilic desulfurizing bacteria, fermenting, and drying to constant weight to obtain fermented manganese oil sludge, the method comprises the following steps: carbonizing dry fermented manganese oil sludge to obtain a manganese carbide oil material, uniformly mixing the manganese carbide oil material with a blueberry extract to obtain a manganese carbide oil extract mixture, uniformly mixing and stirring the obtained manganese carbide oil extract mixture with a chloroplatinic acid solution, standing, filtering, washing, and drying to obtain the mixed halophilic desulfurizing bacteria. Drying to constant weight to obtain a platinum-doped carbonization extraction precursor, and finally roasting the platinum-doped carbonization extraction precursor to obtain the carbon monoxide oxidation catalyst. The composite catalyst with high specific surface area and multiple active sites is formed, and resource utilization of waste is achieved.

The invention provides a tunnel flue gas parameter prediction method based on a physical information neural network, and the method comprises the following steps: constructing a physical information neural network model, and embedding physical constraints including a mass conservation equation, an energy conservation equation and a component conservation equation into a loss function of the physical information neural network model; training the model; obtaining input data related to a tunnel fire; inputting into the trained model to obtain a normalized flue gas concentration predicted value, a normalized carbon monoxide concentration predicted value and a normalized temperature predicted value; and carrying out reverse normalization processing, and outputting a flue gas concentration prediction value, a carbon monoxide concentration prediction value and a temperature prediction value which are expressed in actual physical quantity units. According to the invention, key flue gas parameters such as flue gas concentration, carbon monoxide concentration, temperature and the like in the tunnel can be quickly and accurately calculated and output through the physical information neural network model according to input information such as fire source information, tunnel parameters, material characteristics, natural wind and fan operation states.

The invention discloses a preparation process of a high-strength anti-crack and anti-seepage vertical shaft lining concrete material, which comprises the following steps: (1) uniformly mixing aggregate with a solution containing copper ions, drying to remove moisture, dropwise adding saturated lime water containing alkaline substances into the mixture, and drying to remove moisture to obtain pretreated aggregate; and (2) the pretreated aggregate is placed in a carbon monoxide atmosphere for reduction treatment, the reduction temperature is higher than the melting point of copper, and the surface modified aggregate is obtained after reduction treatment is completed. The surface modified coarse aggregate and the surface modified fine aggregate are respectively prepared according to the method. And (3) uniformly mixing the cement binding material, the surface modified coarse aggregate, the surface modified fine aggregate, the modified fiber, the solid waste-based powder filler, emulsified asphalt and a water reducing agent, adding mixing water, and uniformly mixing to obtain the concrete material. The concrete material disclosed by the invention has good mechanical strength and crack resistance and also has good water seepage resistance, and the service life of the pumped storage power station vertical shaft is effectively prolonged.

The invention discloses a multi-device state sensing driven intelligent storage abnormity early warning method, and relates to the field of storage cargo management, and the method comprises the steps: 1, collecting multi-source data through a multi-source sensor node, including odor intensity, volatile organic compound concentration, carbon dioxide or carbon monoxide content, and environment temperature and humidity, meanwhile, physical coordinates of the multi-source sensor nodes are obtained; 2, acquiring historical multi-source data in advance, constructing a dynamic threshold model based on the historical multi-source data, calculating odor fluctuation, a gas combination abnormal index and a temperature and humidity coupling risk value according to the multi-source data, and introducing time evolution trend analysis to obtain a gas combination abnormal index and a temperature and humidity coupling risk value; and a dynamic threshold model is combined to identify risk signals in the odor fluctuation degree, the gas combination anomaly index and the temperature and humidity coupling risk value, a space attenuation model is adopted to generate a three-dimensional anomaly thermodynamic diagram based on the physical coordinates of the multi-source sensor node and the risk signals, and a high-risk area is positioned.

The application discloses an energy-saving, efficient and adjustable alcohol pre-gas ammonia production process method, and particularly comprises the following steps: S1, a raw material gas is separated from a pressurized coal gasification methanol device as alcohol pre-gas and is sent to a shift device of synthetic ammonia through a sealed pipeline; S2, when entering the shift device, the alcohol pre-gas is mixed with a crude synthetic gas to form a mixed gas, then high-pressure steam is introduced to adjust the water-gas and increase the mixed temperature, carbon monoxide is reacted with water vapor in the shift device, and hydrogen gas is prepared as a shift gas; S3, the shift gas is subjected to low-temperature methanol washing and liquid nitrogen washing, then nitrogen gas produced by air separation is added, a synthetic gas is prepared, and the synthetic gas is sent to an ammonia synthesis device. The energy-saving, efficient and adjustable alcohol pre-gas ammonia production process method is adopted, raw material gas is comprehensively utilized in an energy-saving mode, the methanol and synthetic ammonia production yield is flexibly adjusted, and enterprise benefits are improved.

The invention discloses a preparation method of a ferrocerium / molecular sieve catalyst and an application of the ferrocerium / molecular sieve catalyst in preparation of acetic acid by mild oxidation of methane, and the specific preparation method comprises the following steps: taking metal cerium, ferric salt and a microporous molecular sieve as raw materials, dipping, drying and calcining to prepare the ferrocerium / molecular sieve catalyst. The preparation method is simple in process, easy to implement, simple, convenient and safe to operate, process parameters are easy to control, and active metal cerium and iron in the obtained cerium-iron / molecular sieve catalyst are anchored in micropore channels of a molecular sieve in a monodisperse cation state, so that the cerium-iron / molecular sieve catalyst can selectively oxidize small molecules such as methane and carbon monoxide under mild conditions; and the preparation of high-yield acetic acid chemicals is realized, few byproducts are produced, and large-scale production can be realized.

The invention discloses a toxic gas detector, and relates to the technical field of toxic gas detection. The negative-pressure fan blades and the auxiliary paddles are arranged in the detection cylinder to form a negative-pressure flow field, and the bottom of the cylinder body realizes self-adaptive speed increase through the gear ring-planet regulation and control mechanism; the separation dust collection box adopts tangential multi-channel air intake and is provided with an inverted-cone-shaped sliding funnel, and particles are separated in a centrifugal mode; purified gas is sent to an electrochemical sensor group through a coaxial central gas inlet pipe, so that high-sensitivity monitoring on hydrogen sulfide, carbon monoxide, oxygen and ammonia gas is realized; the problems that an existing detector is prone to being blocked by dust, insufficient in flow and tedious in maintenance are solved, the detection speed, accuracy and reliability are improved, and the device is suitable for continuous safety monitoring of various high-risk environments such as mines, chemical engineering and municipal pipe networks.

The embodiment of the invention discloses a forest fire real-time monitoring system based on multiple sensors of an unmanned aerial vehicle. The forest fire real-time monitoring system is characterized by comprising a four-rotor unmanned aerial vehicle, edge computing equipment, a carbon monoxide sensor and an infrared visible light double-camera, the quad-rotor unmanned aerial vehicle reciprocates and patrols the area for a long distance by relying on a flight task pre-input by edge computing equipment in a specified working range, and a charging hangar is configured at a take-off point of the quad-rotor unmanned aerial vehicle; the edge computing device is installed on the quad-rotor unmanned aerial vehicle, obtains video streams of visible light images and infrared images shot by the infrared and visible light double-camera in real time in the process of flying along a path, carries out real-time smoke alarm in combination with an electric signal input by the carbon monoxide sensor, and carries out multi-mode real-time monitoring by utilizing multiple sensors; when the edge computing device recognizes the forest fire, the forest fire is fed back to the quad-rotor unmanned aerial vehicle, then the quad-rotor unmanned aerial vehicle enters a return flight mode, and forest fire positioning is recorded in the device and fed back to the data center.

The invention discloses a method for analyzing nitrogen isotope in lunar soil, and relates to the technical field of lunar soil analys.The method comprises the steps that an analysis system composed of a heating cavity and a quadrupole mass spectrometer is prepared, and a connecting pipe is provided with a control valve; preparing a plurality of mixed gases of carbon monoxide and nitrogen in different proportions, measuring and recording the gas pressure linear change slope through an analysis system, and establishing a database; lunar soil is put into a heating cavity to be heated, precipitated gas is measured, the slope is recorded, the mixing proportion is determined according to the measured slope and a database, and the nitrogen isotope ratio is obtained by deducting the amount of carbon monoxide. The method effectively avoids carbon monoxide interference, improves measurement accuracy, is simple and convenient to operate, reduces in-orbit measurement load weight, and provides a reliable analysis means for scientific research of the moon and the planet.

The invention provides a carbon monoxide plume identification and quantification method based on a domestic hyperspectral satellite, and the method comprises the steps: carrying out the radiometric calibration and atmospheric correction of the data of a visible short-wave infrared hyperspectral camera AHS I carried by the domestic hyperspectral observation satellite (GF-5B, Gaofen-5 B satellite); generating a carbon monoxide unit absorption spectrum by using a medium-resolution atmospheric transmission model MODTRAN; inverting a carbon monoxide enhancement value by adopting a matched filtering method; generating a binary plume mask through threshold segmentation; and constructing a deep learning model based on a residual neural network ResNet network, and realizing plume pixel-level identification and carbon monoxide column concentration enhancement value prediction. The method can identify the carbon monoxide plume with high precision and high efficiency, and is suitable for atmospheric pollution monitoring and pollution source quantification.

Compositions and methods for a hybrid biological and chemical process that captures and converts carbon dioxide and / or other forms of inorganic carbon and / or CI carbon sources including but not limited to carbon monoxide, methane, methanol, formate, or formic acid, and / or mixtures containing CI chemicals including but not limited to various syngas compositions, into organic chemicals including biofuels or other valuable biomass, chemical, industrial, or pharmaceutical products are provided. The present invention, in certain embodiments, fixes inorganic carbon or CI carbon sources into longer carbon chain organic chemicals by utilizing microorganisms capable of performing the oxyhydrogen reaction and the autotrophic fixation of CO2 in one or more steps of the process.

Disclosed are a CO2 gas-soluble silicon nanofluid and a preparation method therefor. The method includes: taking nano-silica and grafting a silane coupling agent to obtain modified nano-silica; taking methylsiloxane, fluorosilicone, aminosiloxane and an end-capping agent, and performing polymerization under the action of a catalyst to obtain a functionalized network siloxane; and taking the modified nano-silica and the functionalized network siloxane, uniformly mixing, then heating for a Michael addition reaction, and obtaining the gas-soluble silicon nanofluid after the reaction is completed. The gas-soluble silicon nanofluid microscopically forms a network structure with modified nano-silica as a cross-linking point and polysiloxane as a chain; macroscopically, the effect of viscosity increase of the supercritical carbon dioxide is significant, and the dissolving pressure is low. The interfacial tension and the miscibility pressure between the crude oil and CO2 are significantly reduced.

A process for the synthesis of methanol (MeOH) comprising the following steps: (a) passing a water-containing stream (3) through an electrolysis unit (4) to produce a cathode-side stream (5) comprising hydrogen (H2) and an anode-side stream (6) comprising oxygen (O2); (b) heat-exchanging said cathode-side stream (5) and optionally said anode-side stream (6) in one or more indirect heat exchanger(s) (7, 8, 32, 33) to obtain a cathode-side heat-exchanged stream (9) and optionally an anode-side heat-exchanged stream (10); (c) condensing said cathode-side heat-exchanged stream (9) to separate a liquid condensate product (11) and a syngas (12); said cathode-side stream (5) and / or said syngas (12) comprise carbon dioxide and optional carbon monoxide added through a separate stream (2); (d) compressing said syngas (12) in a compressor (27, 28) and then feeding compressed syngas (13) to a MeOH synthesis loop (14) wherein catalytic conversion of said compressed syngas (13) into MeOH is carried out under methanol synthesis conditions, thus obtaining a crude methanol stream (15); (e) distilling said crude methanol stream (15) in one or more distillation column(s) (16, 17) to give a refined MeOH product (19, 22); (i) recycling as feed to the electrolysis unit (4) at least a portion of at least one of: (A) a portion (31) of said compressed syngas (13); and / or (B) a bottom water stream (20) of a distillation column (16, 17).

The present invention relates to a catalyst system for carbon dioxide conversion using reverse water gas shift reaction and, more specifically, to a catalyst system for carbon dioxide conversion, capable of converting carbon dioxide into carbon monoxide through a reverse water gas shift reaction and converting carbon monoxide and carbon dioxide into a hydrocarbon compound through a hydrogenation reaction.

The invention discloses a method for preparing ketone compounds through catalytic hydrogenation of cellulose based on a crude hydrogen atmosphere. The method comprises the following steps: by taking cellulose as a raw material, water as a solvent and active carbon supported Pd as a catalyst, reacting for 1-6 hours under the conditions that the total pressure of hydrogen source gas containing carbon monoxide and carbon dioxide is 0.5-4.0 MPa and the temperature is 230-260 DEG C to obtain a product mainly containing ketone compounds; the volume percent contents of the carbon monoxide and the carbon dioxide in the hydrogen source gas containing the carbon monoxide and the carbon dioxide are both 20%-67%. The reaction provided by the invention has the characteristics of renewable resources of raw materials, low cost in the reaction process, environment friendliness, mild reaction conditions, high product selectivity, high added value and economic value of the product and the like.

A process for the recycling of plastic waste containing at least one of polyethylene or polypropylene comprising the steps a) thermal pyrolysis in an inert atmosphere of the plastic waste to obtain a pyrolysis oil, b) optionally purifying the pyrolysis oil obtained in step a), c) fractionating the pyrolysis oil to obtain at least one fraction of lower boiling hydrocarbons that can be further processed in a cracker, in particular a steam cracker, to give hydrocarbons of lower molecular weight, and at least one fraction of high-boiling residues, d) incinerating high-boiling residues obtained in step c) with an oxygen containing gas, wherein a carbon dioxide containing flue gas stream is obtained, e) purifying the carbon dioxide containing flue gas stream obtained in step d), wherein a purified carbon dioxide containing gas stream is obtained, f) reduction of the carbon dioxide contained in the gas stream obtained in step e) to obtain a gas stream containing carbon monoxide, optionally carbon dioxide and optionally hydrogen, g) optionally admixing hydrogen, preferably produced by water electrolysis, to the gas stream obtained in step f), h) reacting a gas mixture containing carbon monoxide, hydrogen and optionally carbon dioxide obtained in step f) or g) to give methanol, i) manufacturing C2-C4-olefins by a methanol to olefin-process from methanol obtained in step h), j) polymerizing ethylene and / or propylene manufactured in step i) to give polyethylene and / or polypropylene, respectively.

The utility model relates to the technical field of microbial fermentation, in particular to a compound microbial agent liquid fermentation device, which comprises a fermentation box and an exhaust treatment mechanism, the exhaust treatment mechanism comprises an exhaust hood, the exhaust hood is fixed on one side of the fermentation box, and a fan is fixed inside the exhaust hood. A treatment barrel for performing biological desulfurization and denitrification on gas is arranged on one side of the exhaust hood, and a first exhaust pipe is fixed between one side of the exhaust hood and the bottom of the treatment barrel. Gas generated by microbial fermentation in the fermentation box is sucked into an exhaust hood through a fan in the exhaust treatment mechanism, and harmful gas sulfur dioxide and nitric oxide are converted into sulfur and nitrogen through desulfurization and denitrification microorganisms in a treatment barrel; hydrogen and carbon monoxide in harmless gas in the treatment box are subjected to combustion reaction through the flame projector to be converted into water, and finally safe gas is discharged from the exhaust port, so that the safety of an external fermentation environment is improved, resource recycling is realized, and greenhouse gas emission is reduced.

The invention relates to a photoactivated carbonyl manganese (I) complex and a preparation method and application thereof in antibiosis. The manganese (I) complex has a good photoactivation antibacterial effect. Specifically, the manganese carbonyl (I) complex can be photoactivated to release carbon monoxide and ligands under the irradiation of white light. By detecting MIC90 of the photoactivated carbonyl manganese (I) complex to different bacteria, the result shows that the photoactivated carbonyl manganese (I) complex has a better antibacterial effect on mycobacterium smegmatis.

The invention relates to a method for preparing aldehyde through butene hydroformylation, which comprises the following steps: dissolving a rhodium catalyst, a phosphite ester ligand and a butene raw material in an amide solvent to obtain a premixed solution, and keeping the premixed solution at 0 DEG C or below; adding the premixed liquid into a mixed atmosphere of hydrogen and carbon monoxide; heating the premixed solution to a preset temperature, and reacting for a preset time to obtain a mixed solution; after the mixed liquid is layered, upper liquid is obtained through liquid separation, an aldehyde product is obtained, and the butene raw material comprises at least one of 1-butene and 2-butene. In the reaction process, a ligand does not need to be supplemented, and the problem of more impurities caused by hydrolysis does not exist.

The present invention makes it possible to provide: an intermetallic compound that has exceptional long-time durability while exhibiting excellent catalytic activity at low temperature and exceptional methanol synthesis selectivity in methanol synthesis from CO2 or CO, or an intermetallic-compound-containing substance containing said intermetallic compound; a catalyst in which the same is used; a method for producing methanol; and a method for producing an intermetallic compound or an intermetallic-compound-containing substance containing said intermetallic compound. An intermetallic compound according to an embodiment includes a crystal lattice in which a first metal atom and a second metal atom are present at adjacent positions, and includes the first metal atom and the second metal atom. The first metal atom is Pd; the second metal atom is one or more selected from the group consisting of Zn, In, and Ga; in the X-ray diffraction spectrum before temperature rise desorption measurement, the position of the peak of the intermetallic compound is different from the position of the peak of the first metal atom and from the position of the peak of the second metal atom; and the BET specific surface area is 1 m2 / g or greater.

The present invention discloses a preparation method based on an integrated cuprous oxide photocathode. The method includes the preparation of a protein template, the step of preparing a hole transport layer on a conductive substrate, the formation of an inverse protein cuprous oxide photonic crystal structure, and the preparation of a protective layer. Its feature lies in that the step of preparing the photocathode based on the multiple modification of cuprous oxide photonic crystals includes: self-assembling a nanoscale protein template on the substrate with a hole transport layer, then electroplating cuprous oxide and a protective layer by an electrochemical method, and finally forming a multifunctional photocathode with an inverse protein photonic crystal structure through a high-temperature pyrolysis method or a solvent adsorption and desorption method. The multi-layer modified inverse protein Cu2O photocathode obtained by the present invention presents an ordered porous structure and exhibits the characteristics of a photonic crystal. By controlling the size of the protein template, the internal morphology of the inverse protein photonic crystal is regulated, and with the assistance of superimposing multi-layer functional thin films, three goals are achieved: a, improving the light capture ability of the material; b, increasing the photogenerated charge separation efficiency and accelerating the transfer of photogenerated electrons-holes from the bulk to prevent their self-oxidation; c, and avoiding the self-reduction of cuprous oxide through the presence of the protective layer. In the photo-electrochemical catalytic carbon dioxide reaction, the integrated Cu2O photocathode efficiently converts carbon dioxide into carbon monoxide (Φ STC = 1.6%, Yeild CO = 46.7 mmol / h).

The invention discloses a detection method for electronic grade octafluorocyclopentene. The pre-cutting (removal) column is about 1m long and is a Hastelloy C-grade column with an inner diameter of about 2mm. Silica Gel with a particle size of 0.18mm-0.25mm is filled therein, or other equivalent chromatographic columns are used. The pre-cutting (removal) sampling method specified in GB / T 28726 is used to determine the contents of hydrogen, oxygen+argon, nitrogen, carbon monoxide, methane and other fluorocarbon compounds in the octafluorocyclopentene. The provisions of GB / T 5832.2 are used to determine the water content in the octafluorocyclopentene. An inductively coupled plasma mass spectrometry method is used to determine the contents of metal elements such as sodium, zinc, chromium, copper, nickel and iron in the octafluorocyclopentene. Finally, the purity of the octafluorocyclopentene is accurately determined by a difference subtraction method.

The utility model discloses a vortex type mixed gas stove, and relates to the technical field of gas stoves. The stove head comprises a stove head body, air inlets are formed in the side face of the stove head body in an axial symmetry mode, the side face of one air inlet is connected with a stove head main mixing cabin in a penetrating mode, the side face of the other air inlet is connected with a stove head auxiliary mixing cabin in a penetrating mode, the top face of the stove head body is fixedly connected with a circular plate, and the side face of the circular plate is fixedly connected with an annular plate. A through hole is formed in the side face of the circular plate, and an adjusting structure is connected into the through hole in a sleeved mode. According to the utility model, the cooking range is arranged, the fuel gas channel arranged in the cooking range is arranged in a spiral shape, and the diameter of the fuel gas channel is larger, so that gas entering the cooking range through the furnace end main mixing cabin and the furnace end auxiliary mixing cabin forms vortex type airflow through the fuel gas channel, the fuel gas and the air are fully mixed, and the combustion efficiency is improved; the concentration of carbon monoxide is reduced.

The present invention belongs to the technical field of photocatalytic CO₂ reduction, and specifically relates to a dual-MOFs-derived zinc oxide / bismuth oxybromide composite photocatalyst, its preparation method and application. In the present invention, ZIF-8 and Bi-MOF are first prepared by a solvothermal method. After halogenating Bi-MOF with ammonium bromide, ZIF-8 is in-situ grown, and a composite photocatalyst with a dual-MOFs structure composed of zinc oxide particles with a dodecahedral structure derived from ZIF-8 and bismuth oxybromide derived from Bi-MOF is prepared by a one-step calcination method. Under room temperature, xenon lamp illumination, and without a sacrificial agent, this catalyst can effectively catalyze the reduction of carbon dioxide into carbon monoxide and methane, and has good photocatalytic CO₂ reduction performance, stability and repeatability. This preparation method has low cost, high reproducibility, and mild and controllable preparation conditions, and has broad application prospects in the field of photocatalytic CO₂ reduction.