Development of permeable porous-carbon-electrodes and analysis of electrochemical reaction in microchannel

2022 Fiscal Year Final Research Report

• Project/Area Number: 19H02506
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 27020:Chemical reaction and process system engineering-related
• Research Institution: Kyoto University
• Principal Investigator: Nakagawa Hiroyuki 京都大学, 工学研究科, 准教授 (40263115)
• Co-Investigator(Kenkyū-buntansha): 牧 泰輔 京都大学, 工学研究科, 准教授 (10293987) ; 向井 紳 北海道大学, 工学研究院, 教授 (70243045)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: Electrochemical reactor / Fenton reaction / Permeable electrode

Outline of Final Research Achievements

Carbon electrode including microchannel was prepared utilizing fiber-templating method. Shrinkage of electrode during carbonization could be suppressed by mixing adding carbon to sol of raw material. Size of microchannel of carbon electrode is distributed from 0.03 - 0.05 mm, and pressure drop of water flow coincides with theoretical value, indicating that microchannel passes through the electrode. Electrochemical reduction of Fe3+ was performed using the novel flow-type electrochemical reactor, and it was suggested that diffusion of ions from outside of the electrode is rate-determining step whereas diffusion resistance to the reaction surface of the electrode. Model calculation in the microchannel support this hypothesis.

Free Research Field

反応工学

Academic Significance and Societal Importance of the Research Achievements

効率的な電気化学反応器の開発としてマイクロ流路を有する透水型の炭素電極を作製し、液を流通させながらモデル反応で電気化学還元を進行させることに成功した。この形式の反応器はこれまでにない新しいものである。マイクロ流路内の反応について、種々の検討から物質移動を考慮した反応モデルを構築し、実験結果を表せることを示した。マイクロ流路内の電気化学反応というこれまでにない反応場のモデル化に成功しており、効率的な反応器開発に貢献できるものである。