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ICESP X CONFERENCE PAPER ABSTRACTS 5C SERIES

Held in Cairns, Australia
June 25 - 29, 2006

The International Conference on Electrostatic Precipitation (ICESP) is the official conference of the International Society for Electrostatic Precipitation (ISESP).  

The following is a list of the Abstracts for the 5C Series papers from the X ICESP Conference.  

5C1
SHORT GAP NON-THERMAL PLASMA PERFORMANCE TO
DECOMPOSE DILUTE TRICHLOROETHYLENE
TETSUJI ODA, KOICHI ONO AND R.ONO

Abstract

In order to improve the energy efficiency in decomposing dilute trichloroethylene (TCE) by the nonthermal plasma, a new plasma reactor is examined with different discharge gaps (0.4 mm, 2.4 mm, 3.4 mm, and 5.4 mm) and a short gap plasma reactor is the best among them. New manganese oxide-supported alumina spheres are used as the ozone decomposer to enhance the TCE decomposition efficiency by the products (maybe oxygen radicals) of the ozone decomposition. Those new MnO2-supported alumina works very well to decompose TCE. 99.5 % of 250 ppm TCE in the air is decomposed when the specific discharge energy density (SED) is only 15 J/L by the Direct Method with MnO2. That SED value is very compatible to other commercialized catalyst. Close to 100 % carbon mass balance is also realized at SED of 90 J/L where that SED value for a similar level carbon mass balance was more than 400 J/L in the former data.

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5C2 
APPLICATION OF NON-THERMAL PLASMAS TO GAS CLEANING
AND ENHANCING COMBUSTION FOR POLLUTION REDUCTION
L.A. ROSOCHA & Y. KIM

Abstract

For more than two decades, interest in gas-phase pollution control has greatly increased, arising from more attention to the health and economic effects of pollution, a greater respect for the environment, and a larger body of laws and regulations. Non-thermal plasma (NTP) technology shows promise for removing pollutants from gas streams and cleaning contaminated surfaces, using plasma-generated reactive species (e.g., free radicals). Such plasmas, where electrons are energetic (~ few eV) and the gas temperature is near ambient (~ 300 K), can generate both oxidative and reductive radicals - showing promise for treating a variety of pollutants, sometimes simultaneously decomposing multiple species. NTPs can also be used to ‘activate or ‘crack’ hydrocarbon fuels, which promotes the combustion of the fuels (reducing unburned hydrocarbons and allowing fuel burning in regimes where the emissions of CO and NOx are expected to be reduced; e.g., ultra-lean-burn conditions). In this paper, we will review selected experiments and field tests related to the cleaning of VOCs (volatile organic compounds) and NOx from gas streams, using NTPs and discuss a particular NTP source for surface decontamination (radionuclides and chemical/biological warfare agents). The remainder of the paper will focus on experiments devoted to non-thermal plasma-assisted combustion, using model gaseous fuels (like methane, propane, and butane) and alluding to the possibility of applying the process to liquid fuels (like iso-octane, a gasoline surrogate). We will present experimental results demonstrating that NTPs can affect flame stability and, in this way potentially reduce the emission of pollutants.

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