2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pB-1
September 24th (Thu.), <15:45-17:45>
Room 2

Importance of Liquid Flow Induced by Plasma on WaterTreatment○Nozomi TAKEUCHITokyo Institute of Technology

Abstract:
The effect of liquid flow on water treatment using a plasma generated
over a solution was investigated using a two-dimensional numerical simulation ofpulsed argon plasma that was generated between a needle electrode and asolution surface. The behavior of the reactive species generated by the plasma
was calculated by considering electron-impact reactions, gas- and liquid-phasereactions, liquid flow, and mass transfer, assuming a gas–liquid equilibrium on
the interface and flux continuity through the interface. The numerical results
indicated that even a weak liquid flow could drastically change the liquid-phasechemistry.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pB-2September 24th (Thu.), <15:45-17:45>
Room 2

Pilot-scale Experiment of Semi-dry type Exhaust Gas
Treatment for Glass Manufacturing System Using a
Plasma-chemical Hybrid Process○Hashira YAMAMOTO*,**，Tomoyuki KUROKI*，Hidekatsu FUJISHIMA* andMasaaki OKUBO**Department of Mechanical Engineering, Osaka Prefecture University, **Nihon
Yamamura Glass Co., Ltd.

Abstract:
A pilot-scale experiment of semi-dry type simultaneous removal of NOxand SOx using a plasma-chemical hybrid process (PCHP) is carried out on an
exhaust gas in a glass manufacturing system. The exhaust gas is produced by
the combustion of fuel for raw glass materials and contains both NOx and SOx.
NO is oxidized to water-soluble NO2 with the plasma induced ozone gas.
Na2SO3 is produced as a by-product of the de-SOx process using NaOH
solution at gas cooling area of 150°C or less. NO2 is reduced to N2 using
Na2SO3. After the semi-dry state, the Na2SO3 is dried by the heat of exhaustgas, and produces Na2SO4. NO oxidation efficiency of more than 75% isachieved. NO and SOx removal efficiencies are 28% and 63%, respectively.
Furthermore, de-NOx in bag filter is discussed for the injection of NaHCO3. Dueto the synergistic effect of ozone and NaHCO3, and NOx removal efficiency of45% is obtained. Through this experiment, it is confirmed that this simultaneousde-NOx and de-SOx technology using semi-dry type PCHP is highly effectiveand promising for exhaust gas treatment in glass manufacturing system.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pB-3September 24th (Thu.), <15:45-17:45>
Room 2

Basic Treatment Property of Persistent Organic Pollutants in
Wastewater Splay by Nanoseconds Pulsed Discharge in Air〇Shintaro KODAMA*, Satoru MATSUMOTO*, Douyan WANG**, Takao
NAMIHIRA** and Hidenori AKIYAMA*** Graduate School of Science and Technology, Kumamoto university, **Instituteof Pulsed Power Science

Abstract:
Persistent organic pollutants (POPs) are bioaccumulative andenvironmentally persistent substances. POPs cannot be decomposed byconventional water treatments. For this reason, a new treatment method isrequired. Nano-seconds (ns) pulsed discharges enable higher energy
efficiencies of plasma processing. Its advantages have been already performed
at gas phase treatment such as NOx treatment and ozone generation. On theother hand, there are few reports on the water treatment using ns discharge
plasmas. In this study, we tried to decompose the organic pollutants using nsdischarge method by spraying wastewater into gas phase plasma region. Thedischarge reactor was coaxial cylindrical geometry, and the treated wastewater
was circulated and continuously treated in the reactor. The time course of pH
and concentration of Non-Purgeable Organic Carbon (NPOC) in the wastewater
were evaluated at several treatments.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pB-4September 24th (Thu.), <15:45-17:45>
Room 2

Plasma assisted catalytic oxidation of low concentration
carbon monoxide in air・○Toyohashi University of Technology
Dept. of Environmental and Life Sciences, Toyohashi University of Technology

Abstract:
Oxidation of low concentration carbon monoxide (CO) using aplasma-catalyst hybrid reactor at low temperature was carried out. A packed bed
discharge reactor was constructed with three types of dielectric pellets, γ-Al2O3 ,Ru-Al2O3 and Ag-ZSM5. As a result, the reactor with γ-Al2O3 could not remove
CO with or without using the discharge plasma. On the other hand, the reactor
with Ru-Al2O3 showed 75% of CO removal at room temperature. In addition,
90% of CO was removed under the condition of 60ºC and 0% relative humidity
with both of Ru-Al2O3 and Ag-ZSM5. Furthermore, in the case of Ag-ZSM5,
NO2 production was smaller.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pB-5September 24th (Thu.), <15:45-17:45>
Room 2Development of Ultra High Density Ozone GenerationTechnology○Yoko MATSUURA, Yusuke NAKAGAWA, Noboru WADA and YasutakaINANAGAMitsubishi Electric Corporation, Advanced Technology R&D Center

Abstract:
The maximum ozone density of existing ozone generator is about 400
g/Nm3, while further improvement in the ozone generation density can develop
various applications in the fields of semiconductor manufacturing and water
treatment. Mitsubishi Electric has developed the highly-efficient ozone generator
by producing precise narrow discharge gap. Applying the highly-efficient ozone
generator to the pressure-swing ozone concentration system enables the large
supply rate of the ultrahigh density concentrated ozone at low running cost.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pB-6
September 24th (Thu.), <15:45-17:45>
Room 2Ammonia generation using discharge plasma and catalyst
from diesel exhaust gas○Ryo YOSHIDA, Hirofumi KURITA, Kazunori TAKASHIMA, and Akira MIZUNO
Department of Environmental and Life Sciences, Toyohashi University ofTechnology, Japan

Abstract:
Ammonia (NH3) generation from N2,H2O,CO,NO2 was experimentallystudied using a simple plasma-catalyst hybrid reactor. This is intended to be analternative to urea hydrolysis used in urea-SCR deNOx system for dieselengines. A packed bed type plasma reactor was used to generate intensedischarge plasma on the catalyst pellet. Pellets of Pt, Rh, Pt-Rh, and Pd
supported by Al2O3 were examined as catalyst for NH3 generation.
Effect of carbon monoxide (CO) addition was examined to improveenergy efficiency. Ammonia was generated from NO2 and H2O byplasma-catalytic reaction with CO and NO2 addition. Pt-Rh resulted in very highNH3 generation compared with other catalysts. Maximum energy efficiency forNH3 generation in this method was 4.0 g/kWh.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 2015

24pB-7
September 24th (Thu.), <15:45-17:45>
Room 2

Pulsed Dry Methane Reforming in DBD-Catalyst Hybrid
reaction and Reaction Mechanisms
Keishiro TAMURA, Seigo KAMESHIMA, Yutaro ISHIBASHI, Ryo MIZUKAMI,
Tomohiro NOZAKI
Department of Mechanical Sciences and Engineering, Tokyo Institute ofTechnology

Abstract:
Dry methane reforming in dielectric barrier discharge and catalyst hybrid
reactor was investigated. Optical emission spectroscopy was employed forbetter understanding of reaction mechanism for enhanced CH4 and CO2
conversion as well as carbon removal reaction. Strong emission from C2molecules, which is known as C2 high pressure Swan system, was observed
when CO2 + “C(ad) or NiC” = CO + CO becomes dominant reaction. Excited C2
molecules were produced selectively via vibrationally excited CO. Because CO
is produced from adsorbed carbon or nickel carbide, emission from C2 highpressure Swan system becomes a good indication of surface reaction
enhancement by DBD. Time dependent change of gas composition andemission profiles of CO and C2 were correlated and detailed reaction pathways
is discussed.