• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Segment length as an operating parameter of micro multiphase flow

Research Project

Project/Area Number 21H01706
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 27020:Chemical reaction and process system engineering-related
Research InstitutionKyoto University

Principal Investigator

Sotowa Ken-Ichiro  京都大学, 工学研究科, 教授 (00336009)

Co-Investigator(Kenkyū-buntansha) 永木 愛一郎  北海道大学, 理学研究院, 教授 (80452275)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2023: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2022: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2021: ¥10,660,000 (Direct Cost: ¥8,200,000、Indirect Cost: ¥2,460,000)
Keywordsマイクロリアクタ / セグメント流 / 物質移動 / マグネタイト / ナノ粒子 / マイクロ流路 / 共沈法 / 空気酸化 / 物質移動速度 / 物質移動係数 / ガス吸収
Outline of Research at the Start

マイクロ流路の内部では、互いに交じり合わない流体はそれぞれが短いセグメントとなって流れる。このセグメントの長さは相間物質移動に大きな影響を及ぼすが、流体物性や流速のみに依存して定まってしまい、意図的に制御することは通常はできない。本研究では高速に作動するバルブを利用してマイクロ流路におけるセグメント長さを自在に制御できる手法を開発する。さらにこれまで制御できなかったセグメント長さが物質移動速度や反応速度に対して及ぼす影響を定量的に明らかにする。

Outline of Final Research Achievements

Segmented flow plays a crucial role in microreactor applications. The rate of interphase mass transfer in segmented flow is influenced by the length of the segments. In this study, we developed a technology that directly controls segment length using a high-speed, continuously operable valve. This technology allows for the adjustment of segment length without altering the flow rate, enabling us to experimentally elucidate the variations in mass transfer rate attributable to segment length. Additionally, we applied segmented flow to the synthesis of magnetite nanoparticles. Compared with the traditional synthesis methods, this technique yielded nanoparticles with smaller sizes.

Academic Significance and Societal Importance of the Research Achievements

マイクロ流路におけるセグメント流において、セグメント長さの制御が重要であることが認識されていた。しかし流量以外にはセグメント長さを制御する操作パラメータが無かった。このためセグメント長さを変化させるためには流量も変化せざるを得ず、セグメント長さそのものがマイクロリアクタの性能に及ぼす影響を調査することは困難であった。本研究の成果により、流量を変化させることなくセグメント長さを制御することが可能となった。この成果は、マイクロリアクタの特性解析の進展や、長時間の安定運転技術の発展に大きく寄与できる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (8 results)

All 2023 2022

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (4 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] High throughput continuous synthesis of size-controlled nanoFe3O4 in segmented flow2023

    • Author(s)
      Jiang Xiaoyang、Li Sihui、Sotowa Ken-Ichiro、Tonomura Osamu、Hoon Oh Tae
    • Journal Title

      Chemical Engineering Journal

      Volume: 471 Pages: 144546-144546

    • DOI

      10.1016/j.cej.2023.144546

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Continuous Preparation of Fe3O4 Nanoparticles with Narrow Size Distribution by Partial Oxidation Coprecipitation of Fe2+ Ions in Microchannels2023

    • Author(s)
      Jiang Xiaoyang、Sotowa Ken-Ichiro、Li Sihui、Oh Tae Hoon、Tonomura Osamu
    • Journal Title

      Industrial & Engineering Chemistry Research

      Volume: 62 Issue: 49 Pages: 21182-21190

    • DOI

      10.1021/acs.iecr.3c01536

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Investigation of mass transfer in valve-controlled gas-liquid segmented flow2023

    • Author(s)
      Jiang Xiaoyang、Sotowa Ken-Ichiro、Tonomura Osamu、Oh Tae Hoon
    • Journal Title

      Chemical Engineering and Processing - Process Intensification

      Volume: 194 Pages: 109578-109578

    • DOI

      10.1016/j.cep.2023.109578

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Controlling gas-liquid segment length in microchannels using a high-speed valve2022

    • Author(s)
      Jiang Xiaoyang、Sotowa Ken-Ichiro、Tonomura Osamu
    • Journal Title

      Chemical Engineering Research and Design

      Volume: 188 Pages: 868-876

    • DOI

      10.1016/j.cherd.2022.10.038

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Continuous preparation of Fe3O4 nanoparticle from Fe2+ ions by partial oxidation coprecipitation in microreactor2023

    • Author(s)
      Xiaoyang Jiang, Ken-Ichiro Sotowa, Sihui Li, Tae Hoon Oh, Osamu Tonomura
    • Organizer
      The 34th International Symposium on Chemical Engineering (ISChE2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Flow synthesis of size-controlled Fe3O4 nanoparticle in multiphase microreactor2023

    • Author(s)
      Xiaoyang Jiang, Shihui Li, Ken-Ichiro Sotowa, Osamu Tonomura, Tae Hoon Oh
    • Organizer
      20th APCChE Congress
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation of mass transfer in valve-controlled multiphase segmented flow2023

    • Author(s)
      Jiang Xiaoyang, Sotowa Ken-Ichiro, Tonomura Osamu
    • Organizer
      International Chemical Engineering Symposia 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Mass Transfer in Valve-Controlled Gas-Liquid Segmented Flow in Microchannel2022

    • Author(s)
      Xiaoyang Jiang, Ken-Ichiro Sotowa, Osamu Tonomura
    • Organizer
      16th International Microreaction Technology Conference
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi