Back to
ICESP VI CONFERENCE PAPER ABSTRACTS PLASMA CATALYSIS SERIES

Held in Budapest, Hungary
June 18-21, 1996

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 Plasma Catalysis Series papers from the VI ICESP Conference.  

472 - Application of Non-Thermal Discharge Plasma for Flue Gas Cleaning
Akira Mizuno, Kazuo Shimizu, Katushiro Kinoshita, Kenya Yanagihara,
Kazuhiko Tsunoda, H. H.Kim, and Shinji Katsura
Department ofEcological Engineering, Toyohashi University of Technology
Tempaku-cho, Toyohashi, Aichi, 441, Japan


Abstract
The paper reports the results of the experimental study on polluted gas treatment using the non-thermal plasma technique.  Studies were conducted using the dry-type plasma reactor and the wet-type plasma reactor to evaluate DeNOx efficiency.  The reactor geometry was coaxial with an inner discharge electrode and an outer ground electrode wrapped around an insulating glass tube.  In the wet-type reactors, water was used as absorbents.  The results indicate that the wet-type reactor performed better than the dry-type reactor in the removal of NOx.  Energy efficiency of the wet type reactor was around 50 J/g, and was feasible to be used for flue gas cleaning of small or medium size diesel power generation system.  In addition, the effect of catalysts installed in the non-thermal plasma was investigated.  It was found that N2O could be removed effectively when Ca(OH)2 was used in the pulsed discharge.

To View Paper in PDF Format Click Here   
To go Back to ICESP Paper Page Click Here

479 - Non-Thermal Plasma Processing for Air Cleaning
Tetsuji ODA, Ryuichi YAMASHITA, Tomohide KATO and Tadashu TAKAHASID
Dept. of Electr.Eng., the University of Tokyo
7-3-1 Hongo, Bunyo-ku, Tokyo 113 JAPAN

Abstract
No Abstract Available

To View Paper in PDF Format Click Here   
To go Back to ICESP Paper Page Click Here

485 - Decomposition of Methylmercaptan by Non Thermal Plasma
Kiss, E., Nifuku, Mt
 , Brendel, M., Horvath, M., Haj6s, G.
Dunaujvaros Polytechnic of Miskolc University,
Dunaujvaros, Hungary
'National Institute for Resources and Environment,
Tsukuba,Japan

Abstract
It is well known that the non-thermal plasma technologies are having a considerable potential in decomposing air pollutants, such as NOx, SOx, ozone layer depleting gases, VOC-s and other.

It is also well known that in certain paper pulp making technologies, especially in processes based on straw, a rather high concentration of Methylmercaptan is generated, which is a hazardous pollutant for human health.  It can be especially dangerous for children even at low or trace concentration if it inhaled regularly.

To investigate the effect of non-thermal plasma on the Methylmercaptan electrostatic precipitator having a fast rising pulse energization has been used.  A pulse with variable rise and width were used.  The rise was varied between 20 and 500 nsec, the width was between 70 and 1500 nsec.  The pulse peak voltage was changeable up to -40kV.  The repetition frequency was between 10Hz and 1 kHz.

The initial concentration of the Methylmercaptan was around 1%V.  The carrier gases were nitrogen, helium and argon.  In some experiments oxygen was also added to the mixture up to 22% on volume base.  The flow rate was varied from 1 1/min to 10 1/min.

The concentration of the Methylmercaptan was measured by using gaschromatography.  The result of the investigation was that about 90% removal could be achieved.  The change in the rise time did not effect the removal efficiency, but the length of the pulse was an important factor in that.  The shorter pulse resulted higher efficiency.

To View Paper in PDF Format Click Here   
To go Back to ICESP Paper Page Click Here

490 - Removal of the Ozone Layer Depleting Gases Using Non-Thermal Plasma Technology
Kiss, E., Nagy M., Hajos G., Brendel M.
Dunaujvaros Polytechnic of Miskolc University,
Dunaujvaros, H2401 Hungary

bstract
It is well known that the ozone layer is seriously attracted by certain gases emitted by both the nature, and with increasing importance, by the human activity.  It is also known that the non-thermal plasma technology is a powerful tool to abate hazardous pollutants in flue and exhaust gases.  It has been proved in the literature by Masuda, Oda and others that with surface discharge type ozonizers the ozone layer depleting gases can be eliminated or abated.  In this investigation the freons and carbon tetrachloride were treated with surface and volume discharge.

For the surface discharge type reactor a cylindrical type ozoniser was used with internal diameter of 10, 20 and 30mm and with active electrode length of 0.6, 1 and 5m.  The applied voltage was varied between 5 and 12 kV peak-to-peak sinusoidal.  The frequency was changed in the interval of 0.05-10kHz.

Pulse energized cylindrical electrostatic precipitator was used as a volume discharge type reactor.  The diameter of the discharge electrode wire was 0.2 mm, the internal diameter of the round electrode cylinder was 45 mm.  The applied voltage was between 5 kV and 40 kV peak.  The repetition frequency was varied in the 10-500 Hz interval.

The width of the pulse could be changed from 50 nsec to 1500 nsec.  The rise was variable in the 20-500 nsec intervals.  The input gases were Freon 12 and 22 in pure or mixed with dry and moist air.  The concentration was varied between 1000 ppm and 100%.  The chemical analyses were made by gas-chromatography.

The results show that the abatement and decomposition of freons can be achieved.  At lower concentrations the decomposition is more difficult.


To View Paper in PDF Format Click Here   
To go Back to ICESP Paper Page Click Here

495 - Optimizing Pulse Corona Characteristics for Removal of SO2 by Pulse Corona from Simulated Flue Gas
Zhu Ylmln Wang Rongyi Wang Nlnghul Zhang Vanbln Wu Yan
Institute of Electrostatics & Specific Power
Dallan Unlventty of Technology ,Dallan,11602J,P.R.Cblna

Abstract
This paper researched the optimization of pulse corona characteristics for removal of SO2 by pulse corona from simulated flue gas of 4-16Nm3/h.  The discharge circuit of generator was investigated.  Moreover, some compositions of gas being processed were regulated.  By measuring pulse waveforms and analyzing chemical compositions of byproducts, energy yield and removal efficiency were discussed in detail.  The optimization in this system has been realized successfully.  At the same time, a succinct criterion about whether the energy yields is high or low has been provided.  Finally, the energy yield is raised effectively.  With an initial concentration of 1500-2000 ppm of SO2 between 0.8 – 1, the results show that up to 65%-85% of SO2 is removed at a power consumption rate of 4Wh/Nm3.


To View Paper in PDF Format Click Here   
To go Back to ICESP Paper Page Click Here

500 - VOC Removal by Plasma Cathalysis
M. Real ~ A. Dono>, V. Gabelica'

Abstract
Pulse corona plasma-induced processing was applied to decompose volatile organic compounds (VOCs) at low concentrations in atmospheric pressure gas mixture.  Halogenated molecules such as dichloromethane and trichloroethylene were treated and the dependence of their rate of decomposition on their initial concentration, on the relative oxygen content of the gas and on the humidity was studied.  FT-IR, GC-MS and MS analysis allowed us to identify some of the products of the corona discharge were identified.


To View Paper in PDF Format Click Here   
To go Back to ICESP Paper Page Click Here

505 - Decomposition of Hydrocarbons by Back Corona Discharges
A. Jaworek, A. Krupa, T. Czech
Institute ofFluid Flow Machinery, Polish Academy ofSciences 80-952 Gdansk. P.O.Box 621, POLAND

Abstract
Back-corona discharge has been successfully applied for decomposition of hydrocarbons.  Back-corona discharge is generated in a needle-to-plate reactor, with a corona-counter electrode covered with a perforated mica plate.  The results of laboratory experiments show that the back-corona discharge can be more efficient in decomposition of hydrocarbons than positive dc streamer corona discharges.


To View Paper in PDF Format Click Here   
To go Back to ICESP Paper Page Click Here

511 – Back-Corona Generated Plasma for Decomposition of NO2 in Oxygen-Free N2:NO2 Gas Mixture
A.Krupa, A. Jaworek, T. Czech
Institute ofFluid Flow Machinery, Polish Academy ofSciences 80-952 Gdansk, P.0. Box 621, POLAND


Abstract
Back-corona discharge has been tested as a plasma source for conversion of NO2 in the oxygen-free gas mixture of N2:NO2.  The results of laboratory experiments on the conversion of NO2 show that the back-corona discharge can be efficiently used in De-NOx processes, similarly to a dc or pulsed streamer corona discharge.  However, the back-corona discharge produces less NO, and is, especially the positive one, more efficient energetically in the decomposition of NOx.

To View Paper in PDF Format Click Here   
To go Back to ICESP Paper Page Click Here

517 – No removal by Pulsed Corona Discharge in ESP with Irrigated Plate
M. Rea, T. Czech*, M. Dors*, J. Mizeraczyk* and A. Cortiana
Universita' degli Studi di Padova, Dipartimento di Ingegneria Elettrica, Padova, via Gradenigo 6A, Italy
*Institute of Fluid Flow Machinery, Polish Academy of Sciences, 80-952 Gdansk, ul. Fiszera 14, P.O.Box 621, Poland

Abstract
No Abstract Available


To View Paper in PDF Format Click Here   
To go Back to ICESP Paper Page Click Here

523 – Removal of Toulene from Air Stream by a Pulse Corona Plasma Reactor
A. Chakrabarti, T.A. Myint and J.S. Chang 
Department of Engineering Physics
McMaster University
Hamilton, Ontario, Canada L8S 4MI
A. Miziolek
U.S. Army Research Laboratory
AMSRL-WT-PC
Aberdeen Proving Ground, MD, USA

Abstract
Non-thermal plasma technologies offer an innovative approach to the problem of decomposing various volatile organic compounds (VOCs).  We focused on pulse corona discharge plasma reactors to study the decomposition/destruction efficiency for toluene at 80 to 2200 ppm level in dry air.  The effects of gas flow rate, concentration and reactor operating conditions on the decomposition and analysis of reactant conversion for toluene were investigated.  The experimental results show that destruction efficiencies of toluene nonmonotonically depend on applied dc charging voltage, and decrease with increasing gas flow rate, no significant O3, Nox, N2O and CO are observed from air as discharge by-products, and CO2 and H2O are observed to be the final products of toluene destructions.

To View Paper in PDF Format Click Here   
To go Back to ICESP Paper Page Click Here

529 – Reduction of NOx from Natural Gas Combustion Flue Gases by Corona Discharge Radical Injection Techniques and Electrostatic Precipitators|

Abstract
An experimental investigation has been conducted to reduce NOx from natural gas combustion flue gases by means of corona discharge activated ammonia radical injection methods.  The multi-hole type corona radical injectors are used in the present investigation.  Experiments are conducted for the simulated natural gas combustion flue gas (N2:O2: COs :NO = 83.996:8:8:0.004) flow rate from 1 to 200 L/min., the activation voltage (dc or pulse) from 0 to 40 kV and the or Nitrogen-Ammonia mixture gases (95:5) flow rate from 0 to 200 mL/min.  The results show that the NOx reduction increases with increasing activation voltage and ammonia stoichiometry.  Trace amounts of NOs and aerosol particles are observed as a by-product.  Ultra-fine aerosol particles collected by an electrostatic precipitator will be discussed in detail.

 
To go Back to ICESP Paper Page Click Here

535 – The Reduction of NOx and SOx from Flue Gas Using Sub microsecond Pulsed Energization
C A J Paulson , J J Lowke and R Morrow
•CSIRO .Division of Coal and Energy Technology
#CSIRO, Division of Applied Physics
Sydney, Australia

Abstract
Experimental and theoretical studies have been carried out by CSIRO on the effects of sub-microsecond positive voltage pulses on the reduction of sulphur and nitrogen oxides in the flue gas from two different Australian coals.  The experiments showed that, at suitable residence times, the pulsed system removed about 40% of the sulphur oxides (SOx) but more than 90% of the nitrogen oxides (NOx).  It was also shown that water vapor was essential for the removal of SOx was mainly due to OH radicals from water vapor producing H2SO4, whilst NOx was reduced by N atoms.


To View Paper in PDF Format Click Here   
To go Back to ICESP Paper Page Click Here

544 – Reduction of Chemical Pollutants in the Exhaust as of the Municipal Waste Incinerator by PPCP (Pulse Corona Induced Plasma Chemical Process)
Akira Tamaki 1
) and Shunsuke Hosokawa2)
1) Research Center, Takuma Co., LTD.
Hyogo, JAPAN
2) Masuda Research Inc.
Tokyo, JAPAN

Abstract
No Abstract Available


To View Paper in PDF Format Click Here   
To go Back to ICESP Paper Page Click Here

550 – Removal of NOx in a DC Corona Discharge Used in Wet Precipitators
M. Dors, 1. Mizeraczyk,1. Konieczka, T. Czech and M Rea*
Institute of Fluid Flow Machinery, Polish Academy of Sciences,
80-952 Gdansk, ul. Fiszera 14, P.O.Box 621, Poland
"Universita' degli Studi di Padova, Dipartimento di Ingegneria Elettrica
Padova, via Gradenigo 6A, Italy

Abstract
The object of this investigation was the influence of H2O on NO2 decomposition and production of NO and N2O in a mixture of N2:O2:CO2:NO2 subjected to a direct current (dc) corona discharge.  The dc corona discharge was generated in a needle-to-plate reactor.  35 positively polarized needles were used as one electrode.  The other was a stainless steel plate covered with water film, similarly as the collecting electrode in wet precipitators.  The time-averaged discharge current was varied from 0 to 7 mA.  It was found that the presence of H2O increases the decomposition of NO2 and decreases the production of NO.  As a result the concentration of NOx decreases.  The highest NO2 and NOx reduction was observed for discharge current of 4 mA.


To View Paper in PDF Format Click Here   
To go Back to ICESP Paper Page Click Here

555 – Pulse Corona Discharge Investigations and Concept of Combined Effluents Cleaning from Dust and Oxides
Perevodchikov V.I., Ulyanov K.N., Matveev N.V.,
Prozorov E.F., Fedorov V.V., Shapenko V.N.
All-Russian Electrotechnical Institute (VEl)

Abstract
No Abstract Available


To View Paper in PDF Format Click Here   
To go Back to ICESP Paper Page Click Here

562 – NOx Removal Characteristics of Corona Radical Shower System
Toshikazu Ohkubo", Seiji Kanazawa", Yukiharu Nomoto',
Jen-Shih Chang2 and Takayoshi Adachi1
1. Department of Electrical and Electronic Engineering, Faculty of Engineering, Oita University, 700, Dannoharu, Oita, 870-11 Japan
2. Department of Engineering Physics, McMaster University,

Abstract
The effects of flue gas flow rate and seed gas on the corona discharge current-voltage characteristics and NOx removal characteristics are experimentally investigated for a Corona Radical Shower System.  The corona discharge current-voltage characteristics have two operating modes which have a significant influence on NOx removal characteristics, where the threshold gas residence time of the treatment gas in active corona discharge region is about 8.  Maximum NOx reduction rate observed under the non-monotonic corona discharge current-voltage characteristics is higher than that for the monotonic corona discharge current-voltage characteristics.  The leak ammonia in exhaust gas can be significantly lowered by optimizing the ammonia concentration in additional gas.  Maximum NOx removal rate reaches 100% for UNH3/UNO is greater than 1.5.


To View Paper in PDF Format Click Here   
To go Back to ICESP Paper Page Click Here

568 – Effect of Non-Thermal Plasma on Carbon Dioxide
Effect of Non-Thermal Plasma on Carbon-Dioxide
Kiss E., Haj6s G., Horvath M., Nifuku M.', Sa to M.'
Dunaujvaros Polytechnic of Miskolc University, Dunaujvaros,
Hungary
'National Institute for Resources and Environment, Tsukuba, Japan

Abstract
It is well known that the increasing concentration of carbon dioxide can result a serious disturbance in the heat balance of Earth.  It is also know that this gas can be decomposed by electric discharge, however it does not seem energetically feasible.  The high possibility of corona discharges along the high voltage transmission lines can decompose this gas and in the presence of nitrogen and oxygen other chemicals can be produced.

To investigate the decomposition of carbon dioxide by non-thermal plasma surface discharge, volume discharge was used.

As surface discharge type reactor, a cylindrical type ozonizer was used with internal diameter of 10, 20 and 30 mm and with active electrode length of 0,6 1 and 5m.  the applied voltage was varied between 5 and 13 kV peak-to-peak sinusoidal.  The frequency was changed in the interval of 0,5-12 kHz.

As volume discharge reactor, a pulse energized cylindrical electrostatic precipitator was used.  The diameter of the wire was 0,2 mm, the diameter of the cylinder was varied between 5 and 15 cm.  The applied voltage was between -5 kV and -60 kV peak.  The repetition frequency was varied in the 10-500 Hz interval.

The width of the pulse could be changed from 50 nsed to 1500 nsed.  The rise was variable in the 20-500 nsec intervals.

The input gas was pure carbon dioxide mixed with nitrogen or with air.  The concentration was varied between 100% and 1000 ppm.  The chemical analysis was made by carbondioxide analyzer, infrared spectroscopy and gaschromatography.

The results show that the carbon dioxide can be decomposed in the reactors. In pulse plasma in the presence of nitrogen and no oxygen, dinitrogen oxide can be generated which is also a greenhouse gas.

The processes which take place in the presence of high voltage if carbon dioxide and nitrogen oxides are non-stochiometric and resulting different byproducts.


To View Paper in PDF Format Click Here   
To go Back to ICESP Paper Page Click Here

574 – Removal of NO from Flue and Exhaust Gases Using Non-Thermal Plasma Technology
Kiss E., Nifuku M.', Sato M.', Horvath M.,
Haj6s G., Jenei I., Brendel M.
Dunaujvaros Polytechnic of Miskolc University, Dunaujvaros, Hungary
'National Institute for Resources and Environment, Tsukuba, Japan

Abstract
It is well known that non-thermal plasma technology is a powerful tool to abate hazardous pollutants in flue and exhaust gases.  The most common representation for that technology is an electrostatic precipitator energized by fast rising pulse.  The length of the pulse is usually shorter than 1000 nsec, and the rise if faster than a few hundred nsec.

In order to investigate the effect of the pulse energization on the removal characteristics and efficiency cylindrical and rectangular precipitators were made with central wires.  The diameter of the wire was 0.2 mm, the diameter of the cylinder was varied between 5 and 15 cm.  The distance of the sides of the rectangular was 10 cm.  The applied voltage was between -5 kV and -80kV peak.  The repetition frequency was varied in the 10-1500Hz interval.

The width of the pulse could be changed from 50 nsec to 1500 nsec.  The rise was variable in the 20-500 nsec intervals.  The input gas was pure NO mixed with nitrogen or argon or helium.  The concentration was varied between 100% and 1%.  The chemical analysis was made by FTIR, conventional IR analyzer equipment.

The result shows that the abatement of NO, even at 100% concentration can be achieved, and that various kinds of nitrogen oxides can be produced even at pure NO.  the removal efficiency was independent on the rise time in the 70-500 nsec interval, but increased by decreasing rise time below.


To View Paper in PDF Format Click Here   
To go Back to ICESP Paper Page Click Here

580 – The use of Pulsed Corona Technology to Destroy VOCs, Dioxins and Furans at a Municipal Solid Waste Incinerator
J S Carlow, R F King and R McAdams
AEA Technology pIc
Environmental Systems and Services Department
Culham, Abingdon, Oxon. OX14 3DB UK

Abstract
No Abstract Available


To View Paper in PDF Format Click Here   
To go Back to ICESP Paper Page Click Here



][

Last updated: March 27, 2010.
Copyright © 1999 TRK Engineering Services, Inc. All rights reserved.
For more information contact: TRK Engineering Services - 95 Clarks Farm Road - Carlisle, MA 01741 - Telephone: 978-287-0550 - Fax: 978-287-0569 - email: trkeng@apcnetwork.com