氏   名
ムアファク アフマド ヤニ
Muaffaq Achmad Jani
本籍(国籍)
インドネシア
学位の種類
博士(工学)
学位記番号
甲 第34号
学位授与年月日
平成12年3月23日
学位授与の要件
学位規則第4条第1項該当
専  攻
電子情報工学専攻
学位論文題目
A plasma reactor for exhaust gas treatment using dielectric barrier discharge with a multipoint-to-plane geometry

論文の内容の要旨

  Recently the removal of nitroqen oxides(NOX)has become an lmportant problem. A method of exhaust gas treatment based on non-thermal plasma have been proposed. The treatment by non-thermal plasma has several advantages, for example simultaneous removal of NOX and S02 from exhaust qas at high efflciency. For comercial usage , it is important to lower the operatlng voltage and make the plasma reactor compact.
Therefore, a uniform plasma must be produced stably at atmospheric pressure wlth low applied voltage. In this work, low-voltage operatlon of a plasma reactor for exhaust gas treatment has been performed by using a multipoint-to-plane geometry device at high frequencies.The plasma was produced in a narrow gap by a dielectric barrier discharge of 2〜3 KV (effective value)at several ten kilohertz.

  A monochromator was used to analyze the light emitted from the discharge region.By tbe optical spectrum measurement, it was clarified that electrons with high energy, more than lO eV, are produced in the discharge region at atmospheric pressure.

  A simulated flue gas and an actual exhaust gas from a diesel engine generator wer used in the experiment to investigate the performance of the reactor with the rating of 20 KVA.

  The experimental results showed that NOX could be removed by almost lOO% below 200 ppm of the initial concentration of NOX in the gas. The present type of plasma reactor ls effective for the reduction of NOX to low concentrations in an environment where the circulatlon of air is poor such as in a tunnel. The NOX removal is larger by the multipoint-to-plane electrodes than by parallel plane electrodes at lower energy density.

  The results of this study will much contribute to the future work for a solution of the envlronmental problems.