Gaseous ozone decomposition using a nonthermal plasma reactor with adsorbent and dielectric pellets

Abstract

For the treatment of gaseous ozone emission, this study investigated the adsorption and enrichment of ozone and the destruction of the adsorbed ozone by nonthermal plasma. A nonthermal plasma reactor with adsorbent pellets in it was operated in two sequential modes, adsorption and decomposition of ozone. First, the ozone-containing gas was flowed through the reactor for a given period, in which the ozone was adsorbed and concentrated. In the next step, the gas was switched to argon or nitrogen, bypassing the ozone-containing gas, and AC high voltage was applied to the reactor to produce nonthermal plasma for the decomposition of the adsorbed ozone. By this method, the gaseous ozone was effectively treated with reasonable electrical energy consumption. The adsorbed ozone was converted into molecular oxygen when argon was used as the ozone decomposition gas, whereas a small amount of nitrogen oxides was formed with nitrogen. The energy consumed to decompose the adsorbed ozone was found to be 540 and 795 kJ/ g-O 3 decomposed with argon and nitrogen, respectively.

Extending Catalyst Life in Glycerol-to-Acrolein Conversion Using Non-thermal Plasma

“…Since non-thermal plasma is an electron-driven process (Fridman, 2008), atomic oxygen is most likely to be firstly generated via dissociation in the Schumann-Runge band (Equation 3) and in the Herzberg band (Equation 4; Falkenstein, 1999). Herzberg-band dissociation has a higher efficiency than Schumann-Runge-band dissociation (Falkenstein, 1999), because the ground-state oxygen atom O( 3 P) is relatively more stable than the excited-state oxygen atom O( 1 D), and also because O( 1 D) could be easily quenched into O( 3 P) (Equation 5); O( 3 P) was possibly the most predominant atomic oxidant (Bogaerts, 2009; Mok et al, 2009).…”

“…Ozone is another effective strong oxidant that has been previously reported as being reactive with carbonaceous species (Pieck et al, 1994; Smith and Chughtai, 1995; Mawhinney and Yates, 2001; Subrahmanyam et al, 2005). Ozone is generated via three-body collisions (Equation 9), involving the molecular oxygen, the ground-state atomic oxygen, and another gas molecule M; ozone is decomposed via Equation (10) (Mok et al, 2009). Both processes consume some atomic oxygen.…”

Efficient Decomposition of Ozone at Room Temperature by Cobalt-Organic ZIF-67 Nanostructure and Its Derivatives

“…The existing approaches to remove O 3 from ambient air are typically based on physisorption/chemisorption and catalytic posttreatment. − Among them, catalytic direct decomposition of O 3 to O 2 at room temperature is promising due to its ease of operation, high efficiency, and environmentally friendly. Over the last few decades, significant advances have been made in the catalytic degradation of O 3 mostly using transition metal (Mn, Fe, Co, Ni, Cu, etc.)…”