2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 201524aB-1
September 24th (Thu.), <10:00-12:00>
Room 2

Study on the discharge electrode of an electrostatic
precipitator〇Yoshiyuki KISANUKI*, Yuji MAKISHIMA*, Shinjirou KATSUSHIMA*,Kazunori
TAKASHIMA** and Akira MIZUNO**AMANO Co., Ltd*, Toyohashi University of Technology**

Abstract:
By adopting ISO14000 series etc., improvement of the working
environment in the factory has become an important issue. The authors haveverified the effectiveness of the discharge electrode against sedimentation of theoil mist at its tip. The electrodes used in the experiment are; A) needle?plate, B)
needle-circular hole, C) protruding needle-circular hole.
In order to confirm the influence of the sediment attached on the needle
tip, we performed simplified measurement of ionic wind, verification of thecharging efficiency and the field experiment. From the results of ionic windmeasurement and the field experiment, it was found to be effective to direct theneedle tips in the same direction as the main gas flow. From the verification ofthe charging efficiency and the field experiment, the shape C) , newly invented
by us, of the protruding needle-circular hole was the most effective as adischarge electrode for an electrostatic precipitator to collect fine suspended
particles.

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

24aB-2September 24th (Thu.), <10:00-12:00>
Room 2

Electrostatic Precipitator using the weak Corona Discharge
generated by Carbon Fiber Flocking Electrodes
Atsushi KATATANI*, 〇Hiroshi HOSONO**, Hikaru
MURATA**, Hiroshi YAHATA** and Akira MIZUNO***
Panasonic Environmental Systems & Engineering Co., Ltd*，〇PanasonicEcology Systems Co., Ltd**，Toyohashi University of Technology***

Abstract:
The authors have been studying the electrostatic precipitator (ESP)
which can charge particles without using corona discharge to collect particles
with Coulomb’s force in strong electric field. In this method, we have tried to use“induction charging”. DC high-voltage lower than corona-start-voltage is applied
to electrostatic-flocked electrodes with carbon fibers. Particles are attracted tothe fibers due to gradient force. Then, particles are induction-charged just as
particles that have attached to the fibers are re-entrained. Because of thestrengthened electric field by converged electric-force-lines, the particles should
acquire larger induction charge compared to the case of plate electrodes without
flocked fibers. After these particles detach from the fibers, they are collected by
the following parallel plate electrode assembly. Even without corona discharge,
the experimental results in the last study showed that a certain value of particle
collection efficiency was observed. The observed collection efficiency was stablefor smaller particles (from 0.3 to 1.0 μm), however, was unstable for larger
particles (from 1.0 to 5.0 μm). In this study, when a weak corona discharge wasgenerated in the flocked electrodes with carbon fibers, the collection efficiency of
80% or higher, equivalent to conventional ESPs, was obtained in all the diameter
range using only 10% of the electric power consumption compared withconventional ESPs.

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

24aB-3September 24th (Thu.), <10:00-12:00>
Room 2

Basic Characteristics of Ionic Wind Devices Prepared by a
3D Printer○Wataru IMAGAWA*, Masataka KAI*, Shouhei MATSUNARI*, Shuichi
AKAMINE*,Ryuta ICHIKI*, Seiji KANAZAWA*, Koji KANAZAWA*** Department of Electrical and Electronic Engineering, Oita University** Department of Aerospace Systems Engineering, Sojo University

Abstract:
The corona discharges are widely used in many industrial applications
such as gas cleaning, particle precipitation, and gas flow control. Essentially, thecorona discharge apparatus consists of the metallic electrodes and those
supporting insulators. The insulating parts are usually made of plastic, ceramics
or glass. Therefore there is a limit for the design and fabrication of the apparatus.
We have introduced 3D printing technology into the development of non-thermal
plasma reactors. In this study, ionic wind devices based on the dc corona
discharge is studied. Except for the electrodes, the ionic wind devices wereprepared by using a 3D printer. The electrode of corona discharge is aneedle-to-mesh configuration. The performance of the ionic wind devices wasevaluated with respect to the gas flow velocity and its spatial distribution.
Moreover, we examined the effect of the array by the multi-devices. As theadvantage of the array, it is possible to increase the ionic win!
d velocity and to control the air flow distribution widely.

2015 Annual Meeting of The Institute of Electrostatics JapanTokyo Metropolitan University
September 24-25, 201524aB-4September 24th (Thu.), <10:00-12:00>
Room 2Development of an ion wind use humidification system○Takahiro SAKAI*,Yasutaka INANAGA*,Akira MORIKAWA*,Keita
SAKAI*,Tasuku IZUTANI**Mitsubishi Electric Co. Advanced Technology R&D Center

Abstract:
We examined vaporization-type humidification performance control
characteristics, and we paid our attention about the humidification method thatused an ion style together with a filter. As a result, the wind velocity to water
absorptive porous metal increased by injection electric discharge electricity andunderstood that the humidification performance improved. In this way
understood that control of the quantity of humidification was possible.

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

24aB-5September 24th (Thu.), <10:00-12:00>
Room 2

Decomposition of the Water Insoluble Odor Using Corona
Discharge〇Chisaki MATSUMOTO，Nozomi HARASAWA，Josuke HONMA，Sayaka
MITSUI, Azuchi HARANO
Graduate School of Science and Technology, Gunma UniversityAbstract:
This presentation describes the bench scale experiments ofdecomposition of the water insoluble odor (the flow rate of odor gas about 1m3/min) using corona discharge. The odor concentration was adjusted by thebubbling of ethyl mercaptan solution diluted the excess ethanol into coolingcontainer. The concentration of ethyl mercaptan was successfully controlled bythe flow rate of bubbling gas (N2) and it enabled a stable experiment for a long
period of time. The decomposition of ethyl mercaptan was accomplished by thecorona discharge reactor consisted of four stainless wires and achieved the 50%
conversion at an initial concentration of 79ppb and electric power of 15W.
Furthermore, the experimental results suggested that the most of ethyl
mercaptan directly was due to decomposition into corona plasma not oxidationof the ozone produced by corona discharge.

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

24aB-6
September 24th (Thu.), <10:00-12:00>
Room 2

Removal of High Concentration N2O Anesthetic Gas Using
Nonthermal Plasma and Adsorbent〇Tomoyuki KUROKI*, Toshiaki YAMAMOTO*, Shunsuke NISHII*, Masayuki
AKITA**, and Masaaki OKUBO** Department of Mechanical Engineering, Osaka Prefecture University, **Enomoto BeA Co., Ltd.

Abstract:
The high concentration of N2O removal system was investigated using
nonthermal plasma combined with adsorbent. N2O gas that simulates the waste
gas from anesthetic equipment used for operation rooms was decomposedusing the surface discharge plasma reactor. When N2O was decomposed, NOx
was generated. The generated NOx was adsorbed by NOx adsorbent. As aresult, 66% of N2O decomposition efficiency was achieved with 12.8% of N2O,
the flow rate of 1.1 L/min, and the input power to the plasma reactor of 375 W.
Furthermore, 0.4% of NO and 1.0% of NO2 were generated upon N2O
decomposition; both of them were removed using adsorbent. The adsorbed NOx
was able to be decomposed with nitrogen plasma. It was demonstrated that highconcentration of N2O removal system can be accomplished using nonthermal
plasma combined with adsorbent process.

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

24aB-7
September 24th (Thu.), <10:00-12:00>
Room 2

Study of hexadecane removal using atmosphericmicroplasma electrodekazuo Shimizu
Organization for innovation and Social Collaboration, Shizuoka University

Abstract:
In recent years, the deterioration of IAQ (Indoor Air Quality) became abig concern. Because indoors is the place where we spend most of our life, IAQis an important factor to be considered for a comfortable and healthy living. In
this study, we evaluated by-product and deodorization process of hexadecane insmall and large capacity box by using microplasma electrode. Both small andlarge capacity deodorization process could reduce hexadecane each of 90 %and 70 %, while CO and N2O were generated as byproduct.