Neutron radiography and numerical simulation of mixing behavior in a reactor for supercritical hydrothermal synthesis

Ken ichi Sugioka, Kyohei Ozawa, Takao Tsukada, Seiichi Takami, Tadafumi Adschiri, Katsumi Sugimoto, Nobuyuki Takenaka, Yasushi Saito

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

We have visualized the distributions of temperature and water density in a tubular flow reactor for supercritical hydrothermal synthesis of nanoparticles by neutron radiography, and investigated the effect of reactor configuration on the mixing behavior in the reactor. Here, three types of reactors were used, and the mixing behaviors of supercritical water and room-temperature water at a T-junction in the reactors were observed. As a result, it was revealed that the distributions of temperature and water density in the tubular flow reactors strongly depend on their configurations by neutron radiography. In addition, numerical simulations have been carried out to investigate the flow patterns and temperature distributions in the reactor in detail using the commercial software FLUENT, and it was demonstrated that the numerical results can explain the experimental results obtained by neutron radiography well.

Original languageEnglish
Pages (from-to)1168-1175
Number of pages8
JournalAIChE Journal
Volume60
Issue number3
DOIs
Publication statusPublished - 2014 Mar

Keywords

  • Neutron radiography
  • Numerical simulation
  • Supercritical hydrothermal synthesis
  • Temperature distributions
  • Tubular flow reactor

ASJC Scopus subject areas

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)

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