Microwave plasma burner and temperature measurements in its flames

Abstract

An apparatus for generating flames and more particularly the microwave plasma burner for generating high-temperature large-volume plasma flame was presented. The plasma burner is operated by injecting liquid hydrocarbon fuels into a microwave plasma torch in air discharge and by mixing the resultant gaseous hydrogen and carbon compounds with air or oxygen gas. The microwave plasma torch can instantaneously vaporize and decompose the hydrogen and carbon containing fuels. It was observed that the flame volume of the burner was more than 50 times that of the torch plasma. While the temperature of the torch plasma flame was only 550 K at a measurement point, that of the plasma-burner flame with the addition of 0.025 lpm ͑liters per minute͒ kerosene and 20 lpm oxygen drastically increased to about 1850 K. A preliminary experiment was carried out, measuring the temperature profiles of flames along the radial and axial directions.

Numerical Simulation of Thermal Flow Characteristics in Plasma Reactor for Rotten Citrus Fruits Drying

“…The plasma torch was used by calculating the profiles of the temperature and velocity values when the LPG supplied at 2.2 kg/h and the air flow rate was 500 L/min, respectively. The temperature profile was calculated using the results obtained in previous studies [11,12]. After determining the temperature at the center of the torch using reported data, the temperature profiles of the plasma and LPG flame were calculated by the interpolation method.…”

Elimination of dimethyl methylphosphonate by plasma flame made of microwave plasma and burning hydrocarbon fuel

“…13,14,[17][18][19] The main parts of an experimental configuration for destruction of DMMP, as shown schematically in Fig. 13,14,[17][18][19] The main parts of an experimental configuration for destruction of DMMP, as shown schematically in Fig.…”

“…This produced a plasma torch with high-temperature ͑6500Ϯ 350 K͒ and high plasma density ͑ϳ10 13 / cm 3 ͒. 19 This enters the compact reaction chamber where the contaminated air passes then eliminates the toxic agents in the passing air. The plasma generated inside the quartz tube was stabilized by a swirl gas, which was introduced into the microwave plasma torch via four small holes in tangential direction of inner surface of the quartz tube-creating a vortex flow in the discharge tube, stabilizing the torch flame in the center of the tube, and keeping the torch flame off the discharge tube walls.…”

Abatement of fluorinated compounds using a 2.45GHz microwave plasma torch with a reverse vortex plasma reactor

“…The direct current (DC) arc torch is operated by the DC electric field between the two electrodes, which must be replaced often due to their limited lifetime. The inductive coupled plasma (ICP) torch is inefficient devices with typical thermal efficiency in the range of 40-50% and difficult to ignite a discharge [10]. A Microwave plasma torch has several advantages of electrodeless discharge, thermal and large volume plasma.…”