Efficient Catalytic Plasma Activation of CO₂, NO, and H₂O

Abstract

The activation of small molecules, such as CO 2 , NO, and H 2 O, has been achieved at atmospheric pressure via ac glow discharge methods in the presence of metal catalysts coated onto the electrode surfaces. A fan-type reactor having one rotating and one static electrode has been designed to diminish mass transfer effects. Time lapse photography of the emitting plasma intermediate species and optical emission studies have been used to monitor reaction pathways. Gas chromatography, mass spectrometry, and combined GC-MS methods have been used to monitor product distributions, selectivities, and activities. The effects of flow rate, input voltage, diluent gases, and metal coating have been systematically studied. Additionally, the mechanisms of CO 2 decomposition and the role of the metal catalyst in that decomposition have been studied by optical emission spectroscopy.

CO2dissociation using the Versatile atmospheric dielectric barrier discharge experiment (VADER)

“…Many groups have done tests using various structures, foams, etc. for incorporating different catalysts into their experiments [66,[68][69][70][71]. Similar experiments using TiO 2 should also be attempted.…”

Carbon Dioxide Reforming of Methane Using a Dielectric Barrier Discharge Reactor: Effect of Helium Dilution and Kinetic Model

“…Indeed, it has been shown in the literature that helium species such as He ? can be formed and thus considered as energy transfer in reactions [10].…”

Synergistic effect of silent discharge plasma and catalysts on benzene decomposition

“…Nonthermal plasma has attracted much attention as an energy-saving method for VOCs control for this decade [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] due to its unique properties such as quick response at ambient temperature, achievement of high electron energies within short residence times, system compactness, and easy operations. This technique is especially effective in removing olefinic VOCs such as trichloroethylene, tetrachloroethylene, and ethylene at smaller energy consumptions [6].…”