219 results about "Gaseous pollutants" patented technology

The invention provides a gaseous pollutant Fourier transform infrared spectroscopic analysis method based on deep learning. The gaseous pollutant Fourier transform infrared spectroscopic analysis method comprises the following steps: acquiring infrared absorbance spectrums of different gases to be detected by utilizing a Fourier transform infrared gas analyzer; the method comprises the following steps of: preprocessing the collected spectral data, namely carrying out segmented denoising on the original spectral data by adopting a self-adaptive Savitzky-Golay filter, and carrying out normalization processing to balance a data range; carrying out feature extraction on the preprocessed spectral data by utilizing a one-dimensional convolution deep learning model so as to adapt to one-dimensional FTIR spectral features and realize feature extraction of multiple components of gas; mapping the extracted features to a prediction result of the to-be-detected component by applying a full connection layer of the model; and training and optimizing the model by adopting an MSE regression loss function. According to the invention, the processing capability of the gaseous pollutant spectral signal can be effectively improved, and high-precision multi-component quantitative analysis is realized.

The invention relates to the technical field of monitoring and detection, and discloses an intelligent early warning method and system for gaseous pollutants in the semiconductor industry, and the method comprises the steps: analyzing the molecular weight of the gaseous pollutants according to the mass-to-charge ratio in an original mass spectrum signal, and analyzing the pollutant type and concentration space-time distribution matrix of the gaseous pollutants according to the molecular weight; carrying out pollution source analysis on the gaseous pollutants according to the pollutant types and the concentration space-time distribution matrix; analyzing the concentration contribution rate of the target pollution source by using the pollutant component characteristics, and analyzing the multi-stage dynamic early warning condition of the gaseous pollutants according to the concentration contribution rate and the concentration spatial-temporal distribution matrix; when the pollutant concentration data in the concentration space-time distribution matrix exceeds a multi-stage dynamic early warning condition, triggering a graded early warning signal of gaseous pollutants in the semiconductor industrial environment; and adaptively executing a control strategy corresponding to the gaseous pollutants in the semiconductor industrial environment based on the graded early warning signal. According to the invention, the accuracy of intelligent early warning of gaseous pollutants in the semiconductor industry can be improved.

The invention relates to the technical field of atmospheric pollution prevention and control, in particular to a waste gas treatment system for urban ecological environment, which comprises a pressure difference sensing module, a settlement triggering module, a frequency spectrum analysis module and an interface execution module. According to the method, the airflow velocity difference and the vertical pressure gradient are monitored in real time, the deflection angle of the wind field guide plate is dynamically adjusted by adopting a multi-source data calibration mechanism, and liquid film disturbance is triggered in combination with particle concentration distribution data, so that the particle sedimentation efficiency is effectively improved; resonator amplitude parameters are accurately controlled based on gas-liquid interface vibration spectrum feature extraction and shear force data fusion analysis, liquid film dynamic stability optimization is achieved, a micro-vortex enhancement instruction is generated by feeding back liquid film contact time data in real time, a closed-loop regulation and control mechanism is formed, gaseous pollutant absorption efficiency and reaction uniformity are synchronously enhanced, and the stability of the liquid film is improved. The pollutant removal efficiency stability is maintained under complex working conditions, and the system energy consumption and the secondary pollution risk are reduced.

This invention discloses a photoelectrocatalytic degradation device for gaseous pollutants, relating to the field of pollutant treatment technology. It includes a treatment box with four partitions fixedly installed inside. Between each pair of adjacent partitions, a pollutant degradation structure is provided. Each pollutant degradation structure includes four filter cartridges and five linear light sources (secondary). Each of the four filter cartridges contains a linear light source (primary). A U-shaped frame is fixedly installed on the outside of each of the four filter cartridges, and a sponge block is fixedly installed on the outside of the U-shaped frame. Gear transmission components are provided on one side of each of the three pollutant degradation structures. By controlling the drive motor, the three pollutant degradation structures can be cleaned under the transmission of the gear transmission components, reducing impurities adhering to the outside of the four filter cartridges, the four linear light sources (primary), and the five linear light sources (secondary), thus reducing the labor costs required for maintenance of the photoelectrocatalytic degradation device.

The invention provides a source analysis method embedded in atmospheric monitoring equipment. The method comprises the following steps: (1) data acquisition; (2) data preprocessing and feature extraction; (3) constructing a lightweight source component spectrum database; (4) performing online recursion analysis calculation; and (5) non-negative constraint and result output. According to the method, the problem of how to systematically and fundamentally solve multiple bottleneck problems caused by time lag, space limitation, huge equipment, lengthy flow and data distortion under the background that a traditional atmospheric particulate matter and gaseous pollutant source analysis system is bound by an off-line sampling-laboratory analysis mode for a long time is solved.

The invention provides a remote monitoring method and system applied to an air quality intelligent station building, and belongs to the technical field of air quality monitoring. Firstly, a multi-source monitoring element set including operation data of a particulate matter monitor, a gaseous pollutant analyzer and the like of the air quality intelligent station building is obtained; carrying out station building scene linkage processing to generate a station building association relationship; identifying station building abnormal features based on the station building association relationship, and generating a station building abnormal identification result containing abnormal element types and expression forms; performing layered tracing on the station building abnormity identification result, and positioning an abnormity root initial link and a diffusion path; the dynamic regulation and control instruction is generated by combining the root information and is sent to the local control terminal, the feedback result is received, and the monitoring closed-loop record is generated, so that comprehensive, accurate and efficient remote monitoring is realized, and the operation stability and data quality of the station building are improved.

The invention discloses a preparation method and application of doped hierarchical porous manganese dioxide, and belongs to the field of catalyst preparation and air purification. According to the invention, potassium permanganate is used as a manganese source and an oxidizing agent, a modified reducing agent is added, mixing and stirring reaction are carried out at room temperature, and the doped hierarchical porous manganese dioxide catalyst is synthesized after washing, drying and high-temperature treatment. The preparation method is simple in preparation process and high in repeatability; the prepared manganese dioxide realizes doping of potassium ions and formation of oxygen vacancies, and the catalytic activity of the manganese dioxide is improved; the doped manganese dioxide catalyst has a multi-stage structure of micropores, mesopores and macropores, the multi-stage pore structure endows the doped manganese dioxide catalyst with a relatively large specific surface area, the physical adsorption capacity of the doped manganese dioxide catalyst can be improved, and meanwhile, more active sites are exposed, so that the doped manganese dioxide catalyst shows relatively high activity and stability in a reaction for catalytically oxidizing gaseous pollutant formaldehyde at room temperature.

The utility model relates to a sampling gun adapter, and relates to the technical field of sampling guns, the sampling gun adapter comprises a sampling tube, a connecting part and a sampling part are formed on the sampling tube, and a sampling port is formed in one side, close to the sampling part, of the sampling tube; the sealing assembly is mounted on the side, close to the sampling part, of the sampling pipe, and the sealing assembly is used for sealing the sampling opening; the connecting assembly is mounted on the side, close to the connecting part, of the sampling pipe, and the connecting assembly is used for connecting different sampling guns with the sampling pipe. According to the sampling gun, through sealing of the sealing assembly, gaseous pollutants are prevented from being discharged out of the pipeline through the detection opening in the replacement process of the sampling gun, and the influence on the body health of detection personnel is reduced.

A microfluidic preconcentrator is provided, designed to receive a gas sample containing gaseous pollutants such as volatile organic compounds, to concentrate the gaseous pollutants and to transfer them to an analysis device. An assembly comprising an enclosure, a microfluidic preconcentrator, connectors and a means for holding the microfluidic preconcentrator inside the enclosure, a heating device and a cooling device, are provided.

This invention relates to the field of home appliance technology, and discloses a range hood and a method for displaying fume information. The range hood includes: a housing; a plasma discharge module adapted to generate plasma through discharge, so that particulate matter in the fume flowing through the plasma purification zone is charged and collected by the electric field; a back corona catalytic module adapted to generate back corona discharge in the back corona treatment zone, so that gaseous pollutants in the fume repeatedly oscillate in the back corona treatment zone and are adsorbed and / or decomposed; and a pollutant interception component disposed between the back corona treatment zone and the air outlet, and having a plurality of micropores, adapted to intercept small particulate matter in the fume. This invention, through the configured back corona module, can effectively remove gaseous pollutants from the fume, and through the pollutant interception component with micropores, can further intercept residual particulate pollutants, effectively preventing the escape of residual particulate pollutants and further improving the fume purification efficiency.

The invention relates to the technical field of automobile exhaust treatment, in particular to a bifunctional material, a preparation method thereof and an automobile exhaust treatment method. The provided bifunctional material comprises a catalyst and a carbon dioxide adsorbent, the catalyst comprises an active component and a carrier, the active component is distributed on the surface and / or in the carrier; the active component comprises noble metal. The preparation method of the bifunctional material comprises the following steps: loading a solution of a noble metal precursor onto a carrier through an impregnation method to obtain a first intermediate; mixing a carbon dioxide adsorbent precursor with the first intermediate, and performing dispersion treatment to obtain a second intermediate; and calcining the second intermediate to obtain the bifunctional material. The difunctional material provided by the invention is successfully coupled with a catalyst and a carbon dioxide adsorbent, the difunctional material is developed, near-zero emission of gaseous pollutants and carbon dioxide in the running process of an automobile is realized by utilizing the synergistic effect of the catalyst and the carbon dioxide adsorbent, and the difunctional material has excellent regeneration cycle performance.

The invention provides a zero-emission power circulation and fuel gas supply system and method for an LNG power-driven ship. The system comprises an internal combustion engine, a nitrogen membrane separation device, a heat regenerator, a water separator, a liquid CO2 storage tank, a liquid oxygen pump, an LNG pump, an LNG storage tank, a liquid oxygen storage tank, a CO2 condenser, a circulation compressor, a gas buffer tank, a CO2 separator, a first-stage water cooler and a second-stage intermediate heat exchanger. According to the internal combustion engine, LNG serves as fuel, an argon and oxygen mixture serves as a circulating working medium to replace air and natural gas to be combusted and push a piston to move, water vapor and gas CO2 in waste gas generated by the internal combustion engine are condensed and separated after being subjected to stepped cooling, and CO2 is liquefied through a circulating compressor and recycled to a liquid CO2 storage tank. According to the invention, argon is used for replacing air to realize waste heat recovery of the internal combustion engine, so that the energy efficiency of the system is improved, and meanwhile, CO2 capture and zero emission of gaseous pollutants are realized.

The utility model discloses an integral dust removal system for a workshop, which relates to the technical field of dust removal and comprises a dust collection pipeline, a bag-type dust remover, an air compressor, an induced draft fan, a spray tower and an exhaust pipeline, the dust collection pipeline is connected into a plurality of stations, an air inlet of the bag-type dust remover is connected with the dust collection pipeline, and the air compressor is communicated with the bag-type dust remover through a pipeline. An air inlet of the induced draft fan is communicated with an air outlet of the bag-type dust collector through a pipeline, an air inlet of the spray tower is communicated with an outlet of the induced draft fan through a pipeline, and the exhaust pipeline is communicated with an air outlet in the top of the spray tower through a pipeline. According to the utility model, cloth bag dust removal and spray tower dust removal are carried out in sequence, high-efficiency dust removal and deep purification can be realized through graded purification, the ultra-low emission requirement is met, and gaseous pollutants are removed at the same time; the system stability is improved; and dust escape and secondary pollution are prevented. The included angle between the dust collection pipeline and the horizontal plane can prevent smoke dust from accumulating in the pipeline due to horizontal laying of the pipeline.

The invention provides an air purification material and a preparation method thereof, a purification filter element, an air conditioning system and a vehicle, and belongs to the technical field of air purification, and the air purification material comprises a coating layer and a microorganism colonization inner core. The coating layer is loaded with a microcapsule, the microcapsule comprises a wall material and a nutritional core material coated in the wall material, the microorganism colonization inner core is coated in the coating layer, and the microorganism colonization inner core comprises a porous base material and gaseous pollutant degrading bacteria loaded on the porous base material. Wherein the nutrition core material provides nutrition for the gaseous pollutant degrading bacteria. The air purification material provided by the embodiment of the invention can maintain long-term and stable gaseous pollutant degradation performance.

This application relates to the field of big data acquisition technology and provides a carbon-saving deodorization control method and system based on online gas monitoring. The method includes: deploying a corresponding sensor array according to a preset sensor deployment strategy to collect gaseous environmental data, obtaining a multi-dimensional spatiotemporal dataset; extracting features from the multi-dimensional spatiotemporal dataset using a multi-layer convolutional neural network to obtain a diffusion feature set of odor pollutants; constructing an odor pollutant diffusion model based on the diffusion feature set; simulating the probability distribution of the diffusion path of the odor pollutants using a Monte Carlo algorithm based on the odor pollutant diffusion model to generate a diffusion topology; determining the control priority of a preset emission valve based on the diffusion topology; and controlling the opening and closing state of the preset emission valve according to the control priority to ensure that the concentration of the odor pollutants meets a preset concentration condition. This method helps improve the prediction accuracy of the diffusion path of gaseous pollutants.

The utility model discloses a gaseous pollutant monitoring devices of semiconductor clean room gathers sample gas through the gas collection subassembly of setting in semiconductor dustless room, and the anion and cation in sample gas are dissolved as sample solution through the impact bottle, and the standard solution of different concentration gradient is diluted through the standard solution dilution subassembly, and the ion chromatography analyzer is through the responsivity of different concentration gradient standard solution to the anion and cation in sample solution, and establishes standard curve and carries out quantitative analysis, and calculates the concentration of anion and cation, realizes the monitoring to the gaseous pollutant that possibly exists in semiconductor clean room, and the equipment short circuit risk that the sample solution in impact bottle caused is effectively prevented through setting up the anti -suck back subassembly of the application, and the anti -suck back subassembly is directly set up in impact bottle, and compared with setting up anti -suck back bottle alone, saves material piece, and the anti -suck back effect is better, and the equipment is not easily affected by short circuit, prolongs the service life of equipment.

The invention relates to the technical field of waste gas collection and treatment, in particular to a waste gas collection device for digital printing, which comprises a primary separation mechanism, after waste gas generated by digital printing is absorbed by a waste gas collection assembly, the waste gas enters a dust filtering assembly, and dust in the waste gas is filtered; the filtered waste gas continuously rises and enters an activated carbon adsorption mechanism through a switching assembly, gaseous pollutants are absorbed by activated carbon, the activated carbon is stored in an interlayer of a planar spiral plate, gas mixed with the gaseous pollutants moves from the outermost layer of the planar spiral plate to the middle of the planar spiral plate, the path of the gas is spiral, and the gaseous pollutants are adsorbed by the activated carbon. And when activated carbon adsorption is saturated, airflow resistance is increased, so that the air pressure in the switching assembly is increased, at the moment, under the action of the air pressure, the switching assembly works, the waste gas enters the activated carbon adsorption mechanism on the other side of the switching assembly, and the activated carbon adsorbs the waste gas more sufficiently.

The utility model relates to a sampling device capable of synchronously collecting various gaseous pollutants in the atmosphere, which comprises a sucking pump, an air inlet of the sucking pump is connected with a three-way pipe through a pipeline, and one air inlet of the three-way pipe is sequentially connected with a two-way valve, a first flow meter and a first absorption bottle through a pipeline. The other air inlet of the three-way pipe is connected with a three-way valve through a pipeline, one air inlet of the three-way valve is sequentially connected with a second flow meter and a second absorption bottle through pipelines, and the other air inlet of the three-way valve is sequentially connected with a third flow meter and a third absorption bottle through pipelines. Three pipelines are constructed through the common three-way pipe and the three-way valve, the structure is simple, materials are convenient to take, the three pipelines are controlled through the two-way valve and the three-way valve, one to-be-detected gas pollutant can be independently collected, multiple to-be-detected gas pollutants can also be synchronously collected, operation is easy, and the collection efficiency is high.

The invention discloses a device and a method for detecting gaseous pollutants volatilized by a tire, and solves the problems that in the prior art, the detection of the gaseous pollutants does not aim at a single object of the tire, and the simulation of a real tire use environment cannot be realized. The tire volatile gaseous pollutant detection device has the beneficial effect that quantitative measurement of the tire volatile gaseous pollutant can be singly realized, and the specific scheme is as follows: the tire volatile gaseous pollutant detection device comprises a workbench, a supporting frame detachably supports a tire, a sealing cover covers the tire and is in sealing connection with the workbench, and a main control unit is arranged at the position of the workbench; the background environment simulation unit is connected with the main control unit, is supported by the sealing cover or the workbench, can continuously introduce simulation gas into the sealing cover, can simulate sunlight, can heat and refrigerate, and can release moisture; and a background gas component change curve and a temperature change curve are stored in the main control unit to control the action of the background environment simulation unit.

The invention provides a method and a device for purifying tail gas of a mining diesel vehicle. A method for purifying tail gas of a mining diesel vehicle comprises the steps of high-gravity field purification and non-thermal plasma purification, the high-gravity field purification process comprises the steps that a thiol surfactant is added into an aqueous solution, liquid is sprayed to the outer edge of a rotor from an outer water spraying pipe through a centrifugal pump, and the tail gas makes countercurrent contact with the liquid in an outer cavity; particulate matters, sulfides and soluble pollutants in the tail gas are captured by the liquid, and the tail gas which is not captured and absorbed is dried and then is subjected to non-thermal plasma purification. According to the purification method, particulate matter is removed through high gravity field pretreatment, the burden of a follow-up non-thermal plasma technology catalytic system is reduced, and the gaseous pollutant treatment efficiency of the purification method is improved. Sulfides are effectively removed through high gravity field pretreatment, the sulfur resistance of the catalyst is improved, and the service life of the catalyst is prolonged.

The utility model belongs to the technical field of environmental protection equipment, and relates to an asphalt fume waste gas treatment system. The treatment system comprises a circulating dust removal reaction device for filtering asphalt smoke and particulate pollutants and a heat storage combustion device for combusting gaseous pollutants, the circulating dust removal reaction device comprises a venturi reactor, the output end of the venturi reactor is connected to the input end of an ascending pipeline reactor, the output end of the ascending pipeline reactor is connected to the input end of a filter, and the output end of the filter is connected to a heat storage combustion device; the heat storage combustion device comprises a combustion chamber and a plurality of heat storage chambers, and gaseous pollutants enter the combustion chamber to be combusted after being preheated through the heat storage chambers. According to the system, a dry-process circulating dust removal and heat storage combustion process is adopted, so that the problem of sewage generated by conventional wet-process asphalt fume treatment is effectively solved, and the asphalt fume can be effectively removed.

The utility model discloses smelting tail gas treatment equipment, and relates to the technical field of tail gas treatment, the smelting tail gas treatment equipment comprises a tail gas treatment tower, the top of the inner wall of the tail gas treatment tower is rotatably connected with a rotary spraying head, the bottom surface of the rotary spraying head is fixedly connected with a linkage rod, and the outer wall, close to the bottom end, of the linkage rod is fixedly connected with a rotary dust catching net; an adaptive groove is formed in the end, away from the linkage rod, of the rotary dust catching net, and a spring telescopic rod is movably and fixedly connected to the inner wall of the adaptive groove. According to the utility model, the rotary spraying head is matched with the cooling liquid, so that the temperature of tail gas can be reduced, part of water-soluble pollutants can be dissolved, and gaseous pollutants can be condensed. The rotary dust catching net can catch large particles in the rotating process, stir airflow to raise small particles and then intercept the small particles again, the dust catching area can be adjusted through centrifugal force, meanwhile, the vibration filter net further conducts blocking and filtering, the tail gas purification efficiency is greatly improved through cooperation of multiple links, and the content of pollutants in tail gas is effectively reduced.

The invention provides a catalytic converter diagnosis method and device and an engine control module. The method comprises the following steps: acquiring a plurality of diagnosis parameters in the current driving cycle; judging whether each diagnosis parameter meets a corresponding diagnosis activation condition or not; if it is judged that each diagnosis parameter meets the corresponding diagnosis activation condition, the catalytic converter is controlled to be heated to the target temperature within the set time period; and the catalytic converter is diagnosed. According to the catalytic converter temperature control method and device, the catalytic converter is controlled to be heated to the target temperature within the set time period before the catalytic converter is diagnosed, so that the temperature of the catalytic converter meets the diagnosis requirement, the efficiency of the catalytic converter is improved, and gaseous pollutants generated in the diagnosis process are reduced.

Catalyst (2) (OfenKAT) for reducing dust and gaseous pollutant emissions in exhaust gas systems of combustion plants, in particular fireplaces, tiled stoves and workshop stoves, characterized in that the catalyst comprises an open-pore, ceramic element which is arranged in a module frame within a module housing, wherein the ceramic element preferably consists of silicon carbide (SiC), aluminum oxide (Al2O3) or a combination of these materials and / or is coated with at least one catalytically active noble metal from the group platinum (Pt), palladium (Pd), rhodium (Rh) or mixtures thereof.

The invention discloses a hazardous waste waste gas treatment spray tower, belongs to the technical field of spray towers, and aims to solve the problems that a large amount of waste gas is not in full contact with spray liquid in the rising process and the waste gas is wasted because the waste gas rises in an irregular diffusion manner, the spray range of a fixed spray assembly is limited and the spray liquid only can cover a local area in the tower. The spraying tower comprises a spraying tower body, a gas inlet piece is arranged on one side of the spraying tower body, a liquid storage piece is installed in the spraying tower body, the gas inlet piece communicates with the liquid storage piece, a first driving piece is installed in the liquid storage piece, and a plurality of swing pieces are further installed in the liquid storage piece; the three-stage treatment mode of pre-washing of the liquid storage part, cyclone separation of the spiral Venturi tube and precise coupling of rotary spraying is adopted, full-coverage removal of large-particle-size particles, fine particles, viscous glue mist and water-soluble gaseous pollutants is achieved, and compared with a traditional fixed spraying technology, the removal rate of the fine particles and the gaseous pollutants is increased.

The invention belongs to the technical field of microorganism immobilization, and particularly relates to a preparation method of hydrogel microspheres loaded with microorganisms to realize gas-liquid interface exposure. The hydrogel microsphere is of a core-shell structure and comprises core hydrogel containing nutrient substances, a polyelectrolyte layer located on a core-shell interface and an outer hydrogel shell used for immobilizing microorganisms. Stable construction and consistency control of the microsphere structure are realized in the core-shell assembly process; under the action of gaseous pollutant exposure and osmotic pressure, the outer-layer hydrogel shrinks and forms a film structure, so that microorganisms are stably distributed and are continuously in a gas-liquid interface exposure state; the core hydrogel continuously releases water and nutrient substances to the shell layer, the growth and biological functions of immobilized microorganisms under the semi-exposure condition are maintained, the polyelectrolyte layer limits the microorganisms from migrating to the core, and the stability of the exposed state of the microorganisms is guaranteed. The hydrogel microspheres have good optical transparency and microorganism loading consistency, and are suitable for in-situ detection of the toxic effect of gaseous pollutants.

A head assembly is configured to be mounted in a combustion reactor for treating gaseous contaminants, the head assembly including an upper cover assembly, one or more pilot conduits, a pilot flame spout, and one or more fuel spouts. The upper cover assembly is arranged on a thermal reaction area and comprises a top plate, a middle plate and a bottom plate. The guide pipeline is configured to guide an effluent from a semiconductor process, and the guide pipeline passes through the top plate, the middle plate and the bottom plate to guide the effluent to the thermal reaction area. The guiding flame nozzle penetrates through the top plate, the heat insulation object and the middle plate and is communicated with the thermal reaction area through the first opening. The fuel nozzle penetrates through the top plate, the heat insulation object and the middle plate and is communicated with the thermal reaction area through the second opening.

The utility model provides a kind of multifunctional bionic ecological living space device, belong to indoor environment regulation technical field, disclose a kind of multifunctional bionic ecological living space device, to solve the problems such as the insufficient treatment of gaseous pollutants, easy secondary pollution, poor temperature and humidity adjustment of existing air purifier / fresh air machine.The device includes fresh air system (including fresh air motor, fresh air inlet, fresh air outlet), exhaust system (including exhaust fan, exhaust inlet), heat recovery system (heat exchange core), filtration group system (high efficiency filtration, exhaust primary efficiency filtration), negative oxygen ion assembly (negative ion generator module), sensing component (sensor module), sterilization system (ultraviolet lamp) and auxiliary heating device (PTC heater).Through multi-system cooperation, air purification, temperature and humidity regulation, sterilization, heat recovery and bionic environment creation are realized, and indoor living comfort and health are improved.

In certain exemplary embodiments, an air purifier comprises a housing defining an enclosure and having an air entrance and an air exit; a particulate filter; a NCCO filter material configured to adsorb and decompose at least one gaseous pollutant; an AOG configured to generate at least one oxidant; an oxidant remover configured to remove at least one oxidant; a fan unit configured to generate airflow from the air entrance to the air exit; wherein the particulate filter, the NCCO filter material, the AOG, the oxidant remover and the fan unit are positioned within the enclosure such that during operation, a flow of air passes from the air entrance to the air exit through the particulate filter and the NCCO filter material along a direction of the flow of air. In certain embodiments, the air purifier may ensure safety to users while efficiency in removing contaminants can be greatly improved.

A filter unit for removing gaseous compounds (NOx, SOx, VOC, CO etc.) as well as bacteria and viruses from air, an arrangement for reducing the pollutant content of the air in an interior, in particular a motor vehicle interior, and a method for removing gaseous pollutants as well as bacteria and viruses from the air fed into an interior, in particular a vehicle interior.