13 results about "Nitrogen molecule" patented technology

The integrated adsorption tower of the oxygenerator comprises an adsorption tower main body, a gas inlet integrated cover part and a gas outlet integrated cover part which are arranged at two ends of the adsorption tower main body, and a reversing valve arranged on the gas inlet integrated cover part, two molecular sieve cylinders and two air storage tanks are arranged in the adsorption tower main body, the nitrogen removal and noise reduction cylinder is positioned in the middles of the two molecular sieve cylinders and the two air storage tanks, the molecular sieve cylinders are communicated with the air storage tanks, the molecular sieve cylinders can be communicated with the nitrogen removal and noise reduction cylinder under the control of a reversing valve, the reversing valve controls air to alternately enter and remove nitrogen, the molecular sieve cylinders are filled with adsorbents, and the adsorbents are communicated with the nitrogen removal and noise reduction cylinder. The two molecular sieve barrels are integrated on one adsorption tower, so that the assembly difficulty is reduced, the production efficiency is improved, the space utilization rate is improved, and the nitrogen discharge noise is reduced by arranging the silencing barrel.

An air cleaning system (1) has a linear electrode (20) that generates electromagnetic resonance, an electric field probe (40) that measures the intensity of an electric field, and a control unit (70) that controls the power supplied to the linear electrode (20). The control unit (70) operates the frequency of the power supplied to the linear electrode (20) and the position at which the power is supplied to the linear electrode (20) to control the output value of a signal representing the intensity of the electric field to be maximum. The amount of generated ozone is monitored, and the control unit (70) operates in a manner to modulate the amplitude of the supplied power to perform feedback control so that the amount of ozone is always fixed, so that ozone that gives energy above the dissociation energy of oxygen molecules and below the dissociation energy of nitrogen molecules to gas molecules contained in the gas flowing in to decompose viruses is generated but harmful nitrogen oxides are not generated.

The application provides a preparation method and application of high-nucleus cobalt cluster-based MOFs and derivatives thereof, including Co 16 -MOF-BDC-X, Co 16 -MOF-BPDC, crystallized in a tetragonal system, and a space group is P42 / nmc, wherein Co 16 The cell parameter of the MOF-BDC-X is: alpha=beta=gamma=90°, Co 16 The cell parameter of the MOF-BPDC is: alpha=beta=gamma=90°, the application adopts a strategy of assisted synthesis of double small molecules (azide molecules and formic acid molecules), and successfully constructs a series of novel high-nucleus cobalt cluster-based MOFs, including Co 16 -MOF-BDC, Co 16 -MOF-BDC-X (X=NH2, NO2, OH, Br) and Co 16 -MOF-BPDC, the application realizes a great improvement of solar energy conversion efficiency by regulating functional groups on the MOF ligand and modifying strong absorption photosensitive centers on the MOF metal node, and exhibits application in the field of photocatalysis.

This invention relates to the field of automatic control for ozone generation, specifically disclosing an optimized ozone generation control method and system based on improved fuzzy control. The method includes: acquiring the optical emission spectrum of the discharge chamber, extracting the rotational spectrum of nitrogen molecules, decoupling and calculating the instantaneous temperature of the micro-discharge channel, and outputting a thermodynamic mismatch coefficient through a first fuzzy inference; introducing the coefficient into the pulse power supply and the gas flow field loop respectively, and collaboratively adjusting the rise time, pulse width, repetition frequency, and turbulent airflow velocity of the nanosecond pulse; inputting the coefficient and oxygen atom spectral lines into a second fuzzy inference, adjusting the domain and threshold of the main fuzzy controller, and the main controller forming a three-dimensional input vector to output the pulse amplitude adjustment; inputting historical control data into a third fuzzy mining time-series correlation mode to generate a rule confidence correction factor to feed back and optimize the fuzzy rule base. This invention achieves micro-discharge channel thermal state sensing, multi-timescale collaborative control, and strategy self-evolution, significantly improving ozone generation efficiency and electrode lifetime.

The invention discloses a method for synthesizing ammonia, which is characterized in that nitrogen and hydrogen are used as reaction gases, and ammonia is synthesized under the normal pressure or low pressure condition under the action of a gaseous molecular accelerator and a catalyst, wherein the gaseous molecule accelerant is nitrogen oxide. Nitrogen oxide can react with hydrogen to generate ammonia, and active oxygen atoms generated by the reaction can activate nitrogen molecules, so that the ammonia synthesis reaction of nitrogen and hydrogen is greatly promoted, and efficient ammonia synthesis of nitrogen and hydrogen under normal pressure is realized. The synthesis ammonia reaction under the molecular accelerator can also be carried out at low pressure, and the synthesis ammonia rate and conversion rate can be improved by properly increasing the reaction pressure. Besides, a reaction system is optimized, such as reaction process parameters of a catalyst, air speed, composition, pressure, temperature and the like, so that the rate and the conversion rate of ammonia synthesis are also favorably improved, and the rate and the conversion rate of ammonia synthesis close to or exceeding those of traditional industrial Have-Bosch high-temperature and high-pressure ammonia synthesis are realized.

This makes it possible to predict the behavior of oxygen molecules within the pores of a carbon support. [Solution] The analysis method comprises a modeling step, a setting step, a simulation step, and a calculation step. In the modeling step, the carbon support of the hydrogen fuel cell is modeled as a cylindrical carbon nanotube model. In the setting step, the number of water molecule models, oxygen molecule models, and nitrogen molecule models to be placed within the carbon nanotube model is set. In the simulation step, a simulation is performed on the diffusion of water molecule models, oxygen molecule models, and nitrogen molecule models within the carbon nanotube model. In the calculation step, the diffusion coefficient of the oxygen molecule model is calculated based on the simulation results.

The invention discloses an oxygen enrichment membrane assembly and an oxygen enrichment machine, the oxygen enrichment membrane assembly comprises a shell and a membrane layer, the membrane layer is an oxygen enrichment membrane, a mounting cavity is formed in the shell, the membrane layer is arranged in the mounting cavity of the shell, and the membrane layer is connected with the shell and divides the mounting cavity into a membrane inner cavity and a membrane outer cavity; a first vent hole and a second vent hole which are communicated with the membrane outer cavity are formed in the shell, and an airflow channel flowing through the outer surface of the membrane layer is formed between the first vent hole and the second vent hole, so that nitrogen molecules attached to the outer surface of the membrane layer are discharged out of the membrane outer cavity along the airflow channel; the membrane inner cavity is communicated with a negative pressure device in a sealed mode, and the negative pressure device is used for driving air to enter the membrane inner cavity from the membrane outer cavity through the membrane layer. The airflow channel flowing through the outer surface of the membrane layer is formed between the first vent hole and the second vent hole which are communicated with the outside of the membrane, nitrogen molecules attached to the outer surface of the membrane layer are discharged through airflow of the airflow channel, and the situation that the oxygen separation efficiency is reduced due to the fact that the nitrogen molecules block the membrane layer is avoided.

The invention relates to the technical field of molecular sieve adsorption materials, in particular to a Li-SAPO-RHO molecular sieve as well as a preparation method and application thereof. The crystal framework of the molecular sieve is silicoaluminophosphate with an RHO topological structure; in the composition of the molecular sieve framework, the molar ratio of SiO2 to Al2O3 is 0.02 to 0.5; the Li-SAPO-RHO molecular sieve has the advantages that the Li content of the Li-SAPO-RHO molecular sieve is as low as 0.2-2.0%, and the relatively low Li is located at a framework orifice of the molecular sieve to form an alkali metal cation hinge gate effect, so that the adsorption effect on nitrogen molecules is increased. The molar ratio of SiO2 / Al2O3 in a molecular sieve framework is as low as 0.02-0.5, the lower molar ratio of silicon to aluminum is beneficial for the molecular sieve to still keep higher crystallinity after high-temperature roasting, the crystallinity is up to 99% or above, the specific surface area is up to 800 m < 2 > / g, and the molecular sieve can be used as an adsorbent for preparing high-purity nitrogen through pressure swing adsorption.

The application provides an electrode structure for in-situ nitrogen separation, a fuel cell and a preparation method, and belongs to the technical field of fuel cells. The electrode structure comprises an anode gas diffusion layer and an anode catalytic layer, and a nitrogen selective separation adsorption layer is arranged between the anode gas diffusion layer and the anode catalytic layer. The separation adsorption layer is a porous film layer with a pore size between the kinetic diameter of a hydrogen molecule and the kinetic diameter of a nitrogen molecule, and is deposited on the side surface of the anode gas diffusion layer facing the anode catalytic layer in an in-situ growth manner. By adopting the technical scheme provided in the embodiment of the application, the problems in the prior art that the system volume increases sharply, the in-situ nitrogen separation cannot be realized at the electrode level, the nitrogen occupies the active sites of the catalytic layer, hinders the diffusion of hydrogen and accelerates the performance decay of the electrode can be solved.

The invention belongs to the technical field of photocatalytic materials, and particularly relates to a near-infrared light response Bi2S3 / CN photo-thermal catalytic nitrogen fixation catalyst as well as a preparation method and application thereof. In order to provide a photo-thermal catalytic nitrogen fixation catalyst, the invention provides a novel nitrogen reduction system based on a photo-thermal synergistic strategy, a Bi2S3 / S-g-C3N4 heterojunction photo-thermal catalyst (Bi2S3 / CN) is constructed through a solvothermal method, and a nitrogen reduction reaction under efficient driving of solar energy is realized. Wherein Bi2S3 is used as an excellent photo-thermal material and can capture wide-spectrum solar energy and generate high-energy hot carriers, so that nitrogen molecules are effectively activated and the reaction rate is increased; meanwhile, the electronic structure of g-C3N4 is remarkably optimized through S-doped modification, and the visible light absorption and interface charge transfer capacity is enhanced.

The invention discloses a photocatalytic nitrogen fixation fertilization device, and relates to the technical field of agricultural fertilization equipment.The photocatalytic nitrogen fixation fertilization device is characterized in that a first reaction cavity is arranged, the top wall of the first reaction cavity is transparent, so that light is emitted into the first reaction cavity, and a breathable film parallel to the top wall is arranged in the reaction cavity; enabling the first photocatalyst on the gas-permeable membrane to catalyze oxygen molecules and nitrogen molecules to be activated and converted into nitrogen oxides; a second reaction cavity is arranged, the top wall of the second reaction cavity is transparent, light rays are emitted into the second reaction cavity, nitric oxide is introduced into the second reaction cavity to react with water or an aqueous solution containing a second photocatalyst, nitrate nitrogen fertilizer, ammoniacal nitrogen fertilizer or ammonium nitrate fertilizer is generated, light energy is used as driving force in the process, and the light rays are emitted into the second reaction cavity. The method realizes green conversion of nitrogen, oxygen and water, does not need to depend on high-temperature and high-pressure conditions of a traditional ammonia synthesis process or a nitrate synthesis process, and does not discharge a large amount of carbon dioxide in the preparation process, so that the carbon emission is reduced.

The application belongs to the technical field of nanometer material preparation, and specifically discloses a method for laser-assisted mass preparation of boron nitride nanotubes, which comprises the following steps: (1) placing a boron source into a container and erecting a metal net above the container; (2) irradiating the container with a laser under a nitrogen-containing atmosphere; and (3) after the irradiation is completed, cooling the container and collecting the product. By using the erected metal net as an activator for the reaction of the boron source with nitrogen, the reactivity of nitrogen molecules is improved, and the introduction of metal impurities in the reaction of the boron source is avoided. The process of the application is suitable for various types of boron sources and metal nets, is simple, has high yield, and can realize high-quality and macro-quantity production of boron nitride nanotubes with complete shape, high crystallinity and good mechanical properties.