26 results about "Nonthermal plasma" patented technology

A method and system for carrying out non-thermal plasma direct reduction of ore ultrafines into resource material are described. In particular, the present invention is directed to a method for direct reduction of ultrafines using an integrated system including an ultrafines source and a non-thermal plasma source. The method includes delivering ultrafines to a reduction reaction zone; and applying, within the reduction reaction zone, a non-thermal plasma to the ultrafines.

An air treatment device for removing unwanted substances from air, the air treatment device comprising : a non-thermal plasma reactor stage housing comprising an air inlet for receiving the air to be treated, a plurality of non-thermal plasma reactor units for treating the air and an air outlet for exhausting the treated air from the non-thermal plasma reactor stage housing; wherein each of the plurality of non-thermal plasma reactor units comprises a dielectric substrate having a first surface and a second surface, a first electrode disposed on the first surface of the dielectric substrate and a second electrode disposed on the second surface of the dielectric substrate, wherein the first electrode comprises at least one window exposing the dielectric substrate to the air to be treated in the non-thermal plasma reactor stage housing.

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.

A method for synthesis of methanol from a gas that contains carbon dioxide comprises generating nonthermal plasma in a chamber; inducing dissociation of CO2 from the gas to CO and O by introducing the gas into the chamber while sustaining the nonthermal plasma in the chamber; and introducing water into the chamber, thereby inducing hydrogenation of CO to methanol.

A system configured to provide a non-thermal plasma from a variety of feed gases is described. The system includes a plasma applicator; a feed gas source providing a gas flow to the plasma applicator; a power supply configured to deliver electrical power via a transmission line to an electrode of the plasma applicator; a signal generator configured to provide a drive signal to the power supply; and a controller. The controller is configured to receive at least one input status parameter associated with a quality of plasma delivered by the plasma applicator; and provide at least one parameter value for at least one parameter defining an output signal waveform of the power supply. The at least one parameter value is taken from the group consisting of: duty factor, pulse rate, pulse width, pulse delay, pulse modulation and pulse shape.

A method for synthesis of methanol from a gas that contains carbon dioxide comprises generating nonthermal plasma in a chamber; inducing dissociation of CO2 from the gas to CO and O by introducing the gas into the chamber while sustaining the nonthermal plasma in the chamber; and introducing water into the chamber, thereby inducing hydrogenation of CO to methanol.

A system and method is disclosed for decomposing feedstock material in a non-thermal plasma process, the system comprising a reaction chamber for receiving the feedstock material and an inductor locat

A system and a method are described for directly reducing non-ultrafine ore using a non-thermal plasma by a system for directly reducing non-ultrafine ore using a non-thermal plasma. The system includes: a non-ultrafine ore source; a power source driving a microwave antenna providing a high intensity electrical field for generating a non-thermal plasma; a gas source configured to supply hydrogen; and a cold plasma jet providing non-thermal hydrogen plasma. The method includes: providing, via the cold plasma jet, a non-thermal plasma to a reaction chamber; providing, via a feed, non-ultrafine ore to the reaction chamber; and obtaining a reduced ore from the reaction chamber. The reduced ore is obtained by application of the non-thermal hydrogen plasma to the non-ultrafine ore for at least multiple seconds to allow for generation of fractures in particles of the non-ultrafine ore.

The application belongs to the technical field of electro-catalytic material and functional film preparation, and particularly relates to a method for in-situ construction of Ni-LDH film electrode by oxygen non-thermal plasma induction and application of the method in alkaline oxygen evolution reaction. The method comprises the following steps: adding ethanolamine into propionic acid, adding a nickel source, and preparing a nickel-containing precursor solution under the condition of heating and stirring; aging and centrifuging the precursor solution, and taking supernatant as a film-forming sol; spin-coating the film-forming sol on a substrate surface and drying to obtain a precursor film; and placing the precursor film in a microwave non-thermal plasma under an oxygen atmosphere, and in-situ converting the precursor film into a Ni-LDH film electrode containing interlayer anions. The method does not need high-temperature annealing and subsequent hydrothermal activation, and can directly obtain a Ni-LDH film with characteristics of layered double hydroxide. The obtained film shows good oxygen evolution catalytic activity and stability in an alkaline electrolyte, and has an overpotential less than 350 mV and a Tafel slope less than 80 mV / dec under a current density of 10 mA / cm2.

The invention discloses a regeneration method of an inactivated oxygen-deficient photocatalyst, and relates to the technical field of catalyst regeneration, the inactivated oxygen-deficient photocatalyst is treated by adopting a non-thermal plasma discharge mode, the non-thermal plasma has a large number of high-energy electrons, free radicals, ions and active molecules, and the oxygen-deficient photocatalyst can be regenerated. The catalyst can react with pollutant molecules adsorbed on the surface of a deactivated catalyst, and impurities and pollutants occupying oxygen vacancies on the surface of the catalyst can be efficiently removed at normal temperature or near normal temperature, so that activity regeneration is realized; in addition, active oxygen occupying oxygen vacancies in the oxidation reaction can be removed, and then regeneration of the oxygen-deficient photocatalyst which is inactivated due to the fact that the active oxygen occupies the oxygen vacancies is achieved.

An apparatus comprises a chamber, an emitter configured to emit electromagnetic radiation into the chamber, and an igniter configured to provide energy at an ignition point within the chamber to initiate a gas discharge. The emitter and the igniter are operable in conjunction to generate nonthermal plasma within the chamber at atmospheric pressure.

A method for cleaning an enclosed space, the method comprising providing a reservoir of cleaning liquid; generating a very dry mist comprising the cleaning liquid, the mist containing aerosol droplets, where the mist passes through a non-thermal plasma actuator to form plasma active ion particles carried by the aerosol droplets of the mist, where the plasma active ion particles are hydroxyl ions; wherein the flow meter monitors mist flow of mist entering the closed space through the self-cleaning nozzle, and the flow speed of the mist passing through the self-cleaning nozzle is not larger than 2 ml / min; wherein the air pressure in the closed space is kept neutral; wherein there is no cavity within the self-cleaning nozzle, except for the cavity through which the very dry mist flows, and wherein the generated very dry mist is used to clean the enclosed space.

A method and system for carrying out non-thermal plasma direct reduction of ore ultrafines into resource material are described. In particular, the present invention is directed to a method for direct reduction of ultrafines using an integrated system including an ultrafines source and a non-thermal plasma source. The method includes delivering ultrafines to a reduction reaction zone; and applying, within the reduction reaction zone, a non-thermal plasma to the ultrafines.

The invention discloses a method and a system for producing hydrogen by cracking methane through synergy of non-thermal plasma and a catalyst, and the method comprises the following steps: placing a nickel-based catalyst in a dielectric barrier discharge reactor, and introducing a mixed gas of methane and a carrier gas into the dielectric barrier discharge reactor; the plasma generator is started, non-thermal plasma is generated by ionization in the dielectric barrier discharge reactor, and methane is subjected to cracking reaction under the synergistic effect of the non-thermal plasma and the catalyst to obtain carbon and H2. The nickel-based catalyst with a specific structure is introduced into the DBD plasma, so that efficient methane conversion and high-selectivity hydrogen generation at low temperature and low energy consumption are realized, and the problems of high energy consumption and high carbon emission of a traditional thermal catalysis method and low conversion rate and selectivity of a pure plasma method are solved.

An air treatment device for removing unwanted substances from air, the air treatment device comprising: a non-thermal plasma reactor stage housing comprising an air inlet for receiving the air to be treated, a plurality of non-thermal plasma reactor units for treating the air and an air outlet for exhausting the treated air from the non-thermal plasma reactor stage housing; wherein each of the plurality of non-thermal plasma reactor units comprises a dielectric substrate having a first surface and a second surface, a first electrode disposed on the first surface of the dielectric substrate and a second electrode disposed on the second surface of the dielectric substrate, wherein the first electrode comprises at least one window exposing the dielectric substrate to the air to be treated in the non-thermal plasma reactor stage housing.

A system for decomposing feedstock material in a non-thermal plasma process, the system comprising a reaction chamber for receiving the feedstock material and an inductor located in the reaction chamber for creating excited species so as to energize and sustain reactions in a non-thermal plasma to decompose the feedstock material inside the reaction chamber.

Reactor and process for catalytic methanation induced by nanosecond plasma coupled with a radiofrequency plasma.The invention relates to a reactor (1) for non-thermal plasma catalytic methanation, comprising: - an enclosure (2) including a reaction chamber (3), supplied upstream with carbon dioxide and dihydrogen, - a catalytic structure (6) housed in the reaction chamber and comprising at least one catalyst (7) promoting the methanation reaction, - an RF generator (12) electrically connected to at least one RF electrode (13) arranged around the reaction chamber, the RF generator being configured to apply a voltage oscillating in the radio frequencies to the RF electrode, to generate radio frequency discharges in the reaction chamber, - an NS generator (15) electrically connected to an NS electrode (16) arranged around the reaction chamber, the NS generator being configured to transmit electrical pulses to the NS electrode, to generate nanosecond discharges in the reaction chamber. Figure for the abstract: Fig. 1.

A system configured to provide a non-thermal plasma from a variety of feed gases is described. The system includes a plasma applicator; a feed gas source providing a gas flow to the plasma applicator; a power supply configured to deliver electrical power via a transmission line to an electrode of the plasma applicator; a signal generator configured to provide a drive signal to the power supply; and a controller. The controller is configured to receive at least one input status parameter associated with a quality of plasma delivered by the plasma applicator; and provide at least one parameter value for at least one parameter defining an output signal waveform of the power supply. The at least one parameter value is taken from the group consisting of: duty factor, pulse rate, pulse width, pulse delay, pulse modulation and pulse shape.

An apparatus comprises a chamber, an emitter configured to emit electromagnetic radiation into the chamber, and an igniter configured to provide energy at an ignition point within the chamber to initiate a gas discharge. The emitter and the igniter are operable in conjunction to generate nonthermal plasma within the chamber at atmospheric pressure.

The invention relates to a method (1000) for generating a nuclease-free surface, wherein the method comprises: generating (1100) a first non-thermal plasma (10) at atmospheric pressure, wherein the first non-thermal plasma (10) is generated at a first power on a discharge surface; generating (1200) a second non-thermal plasma (20) at atmospheric pressure, wherein the second non-thermal plasma (20) is generated at a second power on the discharge surface, wherein the second power is higher than the first power; generating (1300) a plasma stream (26) from the first non-thermal plasma and the second non-thermal plasma; conducting (1400) the plasma stream (26) to a surface (102, 104) to be cleaned; and inactivating (1500) nucleases on the surface (102, 104, 106) to be cleaned.

The present disclosure relates to apparatus, systems, and methods for producing non-thermal plasmas (NTPs) at greater than atmospheric pressure. In some embodiments, an apparatus comprises a first chamber that defines a variable, an actuator, and a plasma generator. The actuator is configured to transiently vary a pressure within the variable volume of the first chamber. The plasma generator is configured to produce plasma within at least one of the variable volume of the first chamber or a volume of a second chamber. The plasma generator is in selective fluid communication with the variable volume of the first chamber.

Systems and methods for converting methane and hydrogen sulfide to hydrogen and poly carbon subsulfide. An exemplary system includes a non-thermal plasma reactor, a first feed stream including methane, a second feed stream including hydrogen sulfide, a catalyst support material selected from boron nitride, carbon black, graphene, aluminum oxide (Al2O3) or titanium dioxide TiO2, and a catalyst selected from Ru, Rh, Ir, Pd, Pt, Re, Mo, Ni, Co, W and combinations thereof. An exemplary method includes providing a first feed stream including methane to a reactor, providing a second feed stream including hydrogen sulfide to the reactor, and reacting the first feed stream and the second feed stream in a non-thermal plasma in the presence of a catalyst to produce a product stream including hydrogen and poly carbon subsulfide.

The invention discloses a catalyst for nitrogen fixation in a non-thermal plasma environment, a catalytic material, a catalytic system and a low-temperature nitrogen fixation method, and the catalyst can promote nitrogen and oxygen to be activated and converted into nitrogen oxides through redox cycles and defect sites on the surface of the catalyst. The non-thermal plasma can directly realize nitrogen fixation from air at a temperature close to the ambient temperature. The dielectric barrier discharge reactor is coupled with manganese doped TiO2 (Mn-TiO2) to guide the NOx pathway to generate nitrate. The comprehensive characterization associates performance with lattice distortion, rich oxygen vacancies, and Mn < 2 + > / Mn < 3 + > / Mn < 4 + > redox cycles. Compared with pure plasma and pure TiO2, the Mn-TiO2 has the advantages that higher NO2 <-> / NO3 <-> formation rate (37.77 / 151.20 mol / h), higher yield (0.02% / 0.09%) and higher energy efficiency (50.40 mmol / kWh) are realized at the temperature of 56.9 DEG C.

Systems and methods for converting methane and hydrogen sulfide to hydrogen and poly carbon subsulfide. An exemplary system includes a non-thermal plasma reactor, a first feed stream including methane, a second feed stream including hydrogen sulfide, a catalyst support material selected from boron nitride, carbon black, graphene, aluminum oxide (AI2O3) or titanium dioxide TiC2, and a catalyst selected from Ru, Rh, Ir, Pd, Pt, Re, Mo, Ni, Co, W and combinations thereof. An exemplary method includes providing a first feed stream including methane to a reactor, providing a second feed stream including hydrogen sulfide to the reactor, and reacting the first feed stream and the second feed stream in a non- thermal plasma in the presence of a catalyst to produce a product stream including hydrogen and poly carbon subsulfide.

A non-thermal plasma reactor system having an outer member; a non-thermal plasma inner member sleeve disposed within the outer member, the non-thermal plasma inner member sleeve having an central core volume, the non-thermal plasma inner member sleeve being smaller than the outer member to define an annular volume there between, the non-thermal plasma inner member sleeve having an inner surface boundary and an outer surface boundary to define a sleeve volume there between, the inner surface boundary and the outer surface boundary being permeable and configured to permit airflow between the annular volume and the central core volume; dielectric material being disposed within the sleeve volume; and at least one electrode extending within the sleeve volume and another electrode coupled to the inner sleeve member generating the non-thermal plasma contacting the airflow as it flows between the annular volume and the central core volume.