Ozone production by pulsed power in dry air

Abstract

Experimental investigations of high voltage short pulsed streamer discharges in dry air-fed ozonizer under various operating conditions are reported. Ozone concentration, energy input and ozone production yield were measured at various voltages (14 to 37 kv), pulse repetition rates (25 to 400 pulses per second, pps), fixed flow rates (1.5 to 3.0 vmin) and different gap spacings (10 to 20 mm) at a pressure of 1.01 x 10' Pa in dry air. A spiral wire made to a cylindrical configuration in concentric coaxial electrodes of varying dimensions was employed. A magnetic pulse compressor provided the voltage and current pulses. Higher voltage and higher repetition rates yielded higher concentrations of ozone at a fixed flow rate. Additionally the present investigations were extended to assess the performance of pulsed ozone generators using dry air under industrial conditions, where both the concentration of ozone (in parts per million, ppm) and its yield (in g/kWh) were maintained at high levels.

Inhaled nitric oxide

“…Several approaches have been used to produce NO for biomedical purposes, including chemical methods and various electrical systems (Namihira et al ., 2000, 2002; Stoffels et al ., 2006; Kuhn et al ., 2010). However, these reactions produce large amounts of toxic byproducts, such as nitrogen dioxide (NO 2 ) and ozone, and therefore require complex purification systems (Samaranayake et al ., 1999; Hu et al ., 2007). Lovich and colleagues proposed that NO might be produced by catalytic conversion of liquid NO 2 /N 2 O 4 .…”

Pulmonary Delivery of Therapeutic and Diagnostic Gases

“…(36)(37)(38)(39)(40) However, these methods produce large amounts of nitrogen dioxide (NO 2 ) and ozone (O 3 ) as toxic byproducts, requiring complex purification systems. (41,42) We have designed, developed, and tested a simple, portable, and economic NO generation device, producing NO by pulsed electrical discharge in air for inhalation therapy (Fig. 1).…”

Development of a portable mini-generator to safely produce nitric oxide for the treatment of infants with pulmonary hypertension

“…Several methods have been used to produce NO for biomedical purposes [20; 21; 22; 23; 24]. However, these methods produce large amounts of nitrogen dioxide (NO 2 ) and ozone (O 3 ) as toxic byproducts, requiring complex purification systems [25; 26]. In a previous study, we designed, developed, and tested a simple and economic NO generation device, which uses a pulsed electrical discharge between iridium electrodes to produce NO from air [27].…”