In-situ Neutron Tomography on Mixing Behavior of Supercritical Water and Room Temperature Water in a Tubular Flow Reactor

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

doi:10.1016/j.phpro.2015.07.080

In-situ Neutron Tomography on Mixing Behavior of Supercritical Water and Room Temperature Water in a Tubular Flow Reactor

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

Research output: Contribution to journal › Conference article › peer-review

9 Citations (Scopus)

Abstract

We have synthesized metal oxide nanoparticles through hydrothermal reaction at around 400 °C and 25 MPa by mixing the stream of metal ion solution at room temperature with another stream of supercritical water in a continuous flow-type reactor. In order to visualize the mixing behavior of the two streams, we performed neutron tomography measurements. By performing tomography measurements while rotating the mixing piece with supplying supercritical water and room temperature water, we succeeded in obtaining the three dimensional distribution of neutron attenuation. The results clearly showed how the two streams mix, which serves as a reference for numerical simulation.

Original language	English
Pages (from-to)	564-569
Number of pages	6
Journal	Physics Procedia
Volume	69
DOIs	https://doi.org/10.1016/j.phpro.2015.07.080
Publication status	Published - 2015
Event	Proceedings of the 10th World Conference on Neutron Radiography, WCNR-10 2014 - Grindelwald, Switzerland Duration: 2014 Oct 5 → 2014 Oct 10

Keywords

flow-type reactor
hydrothermal reaction
mixing
supercritical water
tomography

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10.1016/j.phpro.2015.07.080

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@article{d4743307a54a4f2d8cf5c23beb442149,

title = "In-situ Neutron Tomography on Mixing Behavior of Supercritical Water and Room Temperature Water in a Tubular Flow Reactor",

abstract = "We have synthesized metal oxide nanoparticles through hydrothermal reaction at around 400 °C and 25 MPa by mixing the stream of metal ion solution at room temperature with another stream of supercritical water in a continuous flow-type reactor. In order to visualize the mixing behavior of the two streams, we performed neutron tomography measurements. By performing tomography measurements while rotating the mixing piece with supplying supercritical water and room temperature water, we succeeded in obtaining the three dimensional distribution of neutron attenuation. The results clearly showed how the two streams mix, which serves as a reference for numerical simulation.",

keywords = "flow-type reactor, hydrothermal reaction, mixing, supercritical water, tomography",

author = "Seiichi Takami and Sugioka, {Ken Ichi} and Kyohei Ozawa and Takao Tsukada and Tadafumi Adschiri and Katsumi Sugimoto and Nobuyuki Takenaka and Yasushi Saito",

note = "Funding Information: This work has been performed in part under the Visiting Researchers Program of Kyoto University Research Reactor Institute. This work was supported by JSPS KAKENHI Grant Number 24656461 and Nippon Sheet Glass Foundation for Materials Science and Engineering. Publisher Copyright: {\textcopyright} 2015 The Authors.; Proceedings of the 10th World Conference on Neutron Radiography, WCNR-10 2014 ; Conference date: 05-10-2014 Through 10-10-2014",

year = "2015",

doi = "10.1016/j.phpro.2015.07.080",

language = "English",

volume = "69",

pages = "564--569",

journal = "Physics Procedia",

issn = "1875-3884",

publisher = "Elsevier BV",

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TY - JOUR

T1 - In-situ Neutron Tomography on Mixing Behavior of Supercritical Water and Room Temperature Water in a Tubular Flow Reactor

AU - Takami, Seiichi

AU - Sugioka, Ken Ichi

AU - Ozawa, Kyohei

AU - Tsukada, Takao

AU - Adschiri, Tadafumi

AU - Sugimoto, Katsumi

AU - Takenaka, Nobuyuki

AU - Saito, Yasushi

N1 - Funding Information: This work has been performed in part under the Visiting Researchers Program of Kyoto University Research Reactor Institute. This work was supported by JSPS KAKENHI Grant Number 24656461 and Nippon Sheet Glass Foundation for Materials Science and Engineering. Publisher Copyright: © 2015 The Authors.

PY - 2015

Y1 - 2015

N2 - We have synthesized metal oxide nanoparticles through hydrothermal reaction at around 400 °C and 25 MPa by mixing the stream of metal ion solution at room temperature with another stream of supercritical water in a continuous flow-type reactor. In order to visualize the mixing behavior of the two streams, we performed neutron tomography measurements. By performing tomography measurements while rotating the mixing piece with supplying supercritical water and room temperature water, we succeeded in obtaining the three dimensional distribution of neutron attenuation. The results clearly showed how the two streams mix, which serves as a reference for numerical simulation.

AB - We have synthesized metal oxide nanoparticles through hydrothermal reaction at around 400 °C and 25 MPa by mixing the stream of metal ion solution at room temperature with another stream of supercritical water in a continuous flow-type reactor. In order to visualize the mixing behavior of the two streams, we performed neutron tomography measurements. By performing tomography measurements while rotating the mixing piece with supplying supercritical water and room temperature water, we succeeded in obtaining the three dimensional distribution of neutron attenuation. The results clearly showed how the two streams mix, which serves as a reference for numerical simulation.

KW - flow-type reactor

KW - hydrothermal reaction

KW - mixing

KW - supercritical water

KW - tomography

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U2 - 10.1016/j.phpro.2015.07.080

DO - 10.1016/j.phpro.2015.07.080

M3 - Conference article

AN - SCOPUS:84974573908

SN - 1875-3884

VL - 69

SP - 564

EP - 569

JO - Physics Procedia

JF - Physics Procedia

T2 - Proceedings of the 10th World Conference on Neutron Radiography, WCNR-10 2014

Y2 - 5 October 2014 through 10 October 2014

ER -

In-situ Neutron Tomography on Mixing Behavior of Supercritical Water and Room Temperature Water in a Tubular Flow Reactor

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Keywords

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