A nitric oxide generator generates nitric oxide from a mixture of nitrogen and oxygen such as air treated by a pulsating electrical discharge. The desired concentration of nitric oxide is obtained by controlling at least one of a frequency of the pulsating electrical discharge and duration of each electrical discharge pulse.

The corona-effect reactor includes: a reaction chamber including an air supply port, an exhaust port, an electrode port, and a reaction cavity, the supply port, the exhaust port, and the electrode port each emerging into the reaction cavity; an air supply device configured to be fluidly connected to the air supply port by means of a guide duct and to supply air to the reactor; a high voltage electrode configured to be at least partly inside and to cooperate with the electrode port; a power supply configured to supply power to the high voltage electrode as well as the air supply device. A ratio between a cross section of the guide duct and a cross section of the reaction cavity being between and 3/10, and for example .

A nitric oxide generator generates nitric oxide from a mixture of nitrogen and oxygen such as air treated by a pulsating electrical discharge. The desired concentration of nitric oxide is obtained by controlling at least one of a frequency of the pulsating electrical discharge and duration of each electrical discharge pulse.

Systems and methods for generating nitric oxide are disclosed. A nitric oxide (NO) generation system includes at least one pair of electrodes configured to generate a product gas containing NO from a flow of a reactant gas; and a controller configured to regulate the amount of nitric oxide in the product gas produced by the at least one pair of electrodes by utilizing duty cycle values of plasma pulses selected from a plurality of discrete duty cycles to produce a target rate of NO production based on an average of discrete production rates associated with each of the plurality of discrete duty cycles.

A plasma process for synthesis of nitrates and nitrites is described. The proposed process utilizes an electrical discharge in a two-phase gas-liquid mixture of oxygen, nitrogen and water droplets, the average droplet size being less than 200 micrometers. The presence of microdroplets changes the electrical discharge, particularly by creating local regions of enhanced electric field near the droplet surface where the plasma-induced chemical reactions are intensified. Further, the microdroplets suppress the reverse chemical reaction and enhance the direct reaction of nitrate/nitrite formation, thus increasing the amount of product for the same input energy and decreasing the energy cost per unit product. The proposed process thus enables plasma production of nitrate fertilizer with reduced energy costs.

The present disclosure describes systems and methods for controlling the electrical generation of nitric oxide. In some aspects, a system for generating nitric oxide comprises a plasma chamber housing two or more electrodes in communication with a resonant high voltage circuit configured to send a signal to the plasma chamber for generating nitric oxide in a product gas from a flow of a reactant gas, and a controller configured to generate a pulse width modulation signal having multiple harmonic frequencies to excite the resonant high voltage circuit. The controller is configured to adjust the duty cycle of the pulse width modulation signal, the controller selecting the duty cycle based on a target voltage before plasma formation and a target current after plasma formation in the plasma chamber.

Architectures for production of nitric oxide (NO) include systems and methods for generating NO having one or more plasma chambers configured to ionize a reactant gas to generate a plasma for producing a product gas containing NO using a flow of the reactant gas through one or more plasma chambers; a controller configured to regulate the amount of nitric oxide in the product gas using one or more parameters as an input to the controller, one or more parameters including information from a plurality of sensors configured to collect information relating to at least one of the reactant gas, the product gas, and a medical gas into which product gas flows; and a flow divider configured to divide a product gas flow from the plasma chamber into a first product gas flow to provide a variable flow to a patient inspiratory flow and a second product gas flow.

According to a first aspect of the present invention, there is provided an apparatus for forming NOx from nitrogen and oxygen, the apparatus comprising: a gliding arc discharge, GAD, device arranged to generate a plasma; a passageway including an inlet for a feed gas comprising nitrogen and oxygen and an outlet for the NO.sub.x, wherein the passageway extends, at least in part, through the GAD device wherein, in use, the nitrogen and oxygen are reacted in the generated plasma, thereby forming the NO.sub.x from at least some of the nitrogen and oxygen; and a post-discharge container for adjusting the NO.sub.2/NO ratio in the formed NO.sub.x to from 1:2 to 2:1.

Described herein is a one-pot method for selective N.sub.2O and NO synthesis. A catalytic metal surface facilitates the oxidation of plasma-activated nitrogen species to produce nitrogen oxides (NO and N.sub.2O). The metal surface oxygen adsorption strength is critical in directing product selectivity to different nitrogen oxide (N.sub.xO.sub.y) products. Temperature regimes are important in directing product selectivity using Pt catalyst.