Fabrication of Catalyst Nanoparticles by an Innovative Multiphase AC Arc

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K18265
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Reaction engineering/Process system
• Research Institution: Kyushu University
• Principal Investigator: Tanaka Manabu 九州大学, 工学研究院, 助教 (10707152)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 熱プラズマ / 交流アーク / 交流放電 / 多相交流 / ナノ粒子 / 高速度カメラ / ダイオード整流 / 電極消耗

Outline of Final Research Achievements

Fundamental phenomena in a multiphase AC arc as an attractive thermal plasma source has been successfully understood on the basis of a high-speed visualization technique. Optical band-pass filter and the high-speed camera was combined to visualize nanoparticle precursor in thermal plasmas. In the present work, metal oxide nanoparticles such as aluminum oxide and titanium oxide and metal nitride nanoparticles were successfully synthesized. Moreover, their oxide molecular which are precursor of the nanoparticles and temperature field of the multiphase AC arc were visualized. In addition, an innovative generating system of AC arc system has been developed to improve electrode erosion characteristics in the multiphase AC arc on the basis of the understanding of the electrode erosion mechanism in the thermal plasma. Electrode erosion was drastically reduced by new generating system due to the diode-rectification.

Free Research Field

プラズマ化学