Gas-Phase Pollutant Decomposition with Non-Thermal Plasmas: Simple Removal Equations and Figures-of Merit

Local PDF: ADA371119.pdf

AD Number: ADA371119
Subject Categories: PHYSICAL CHEMISTRY PLASMA PHYSICS AND MAGNETOHYDRODYNAMICS
Corporate Author: LOS ALAMOS NATIONAL LAB NM
Title: Gas-Phase Pollutant Decomposition with Non-Thermal Plasmas: Simple Removal Equations and Figures-of Merit
Descriptive Note: Conference proceedings
Personal Authors: Rosocha, Louis A.
Report Date: 1999
Pages: 24 PAGES
Contract Number: W-7405-ENG-36
Monitor Acronym: XD
Monitor Series: SERDP
Supplementary Note: Viewgraphs only. Presentation Vugraphs for 5th International Conference on Advanced Oxidation Technologies for Water and Air Remediation (AOTS-5), Albuquerque, NM (May 23-28, 1999).
Descriptors: *PLASMAS(PHYSICS), *VAPOR PHASES, *GASES, *POLLUTANTS, *DECOMPOSITION, IONS, LOW TEMPERATURE, REMOVAL, REACTIVITIES, ELECTRON BEAMS, ELECTRON ENERGY, ELECTRIC DISCHARGES, FREE RADICALS, HEAT, ENERGETIC PROPERTIES, FIGURE OF MERIT, OXIDATION REDUCTION REACTIONS.
Identifiers: VIEWGRAPHS ONLY, SERDP(STRATEGIC ENVIRONMENTAL RESEARCH AND DEVELOPMENT PROGRAM), *NONTHERMAL PLASMAS, REMOVAL EQUATIONS, PLASMA ELECTRONS, COLD PLASMAS
Abstract: Non-thermal plasmas (NTPs) are a type of advanced oxidation and reduction technology for treating gas-phase chemical pollutants. Such plasmas are good sources of highly reactive oxidative and reductive species (free radicals and others), e.g., O(P3), OH, N, H, NH, CH, O3, O2 (delta-1), and plasma electrons. Because radical-attack reaction rate constants are very large for many chemical species, entrained pollutants are readily decomposed by NTPs. Via these reactive species, one can direct electrical energy into favorable gas chemistry through energetic electrons, rather than using the energy to heat the gas. NTPs are commonly created by an electrical discharge in a gas or the injection of an energetic electron beam into a gas. Both methods create secondary plasma electrons, with a distribution of electron energies defined by an average electron energy (or electron temperature). In NTPs, the electrons are highly energetic (hot) and the ions and background gas species are at near- ambient temperature (cold). For this reason, these plasmas are sometimes called cold plasmas.
Limitation Code: APPROVED FOR PUBLIC RELEASE
Source Code: 211350
Citation Creation Date: 15 DEC 1999