In-situ visualization of heavy oil behavior in supercritical water using neutron radiography

被引:9
|
作者
Shoji, Eita [1 ]
Kikuchi, Takahiro [1 ]
Yamagiwa, Koshiro [1 ]
Kubo, Masaki [1 ]
Tsukada, Takao [1 ]
Takami, Seiichi [2 ]
Sugimoto, Katsumi [3 ]
Ito, Daisuke [4 ]
Saito, Yasushi [4 ]
机构
[1] Tohoku Univ, Dept Chem Engn, Aoba Ku, 6-6-07 Aramaki Aza Aoba, Sendai, Miyagi 9808579, Japan
[2] Nagoya Univ, Dept Mat Proc Engn, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648603, Japan
[3] Kobe Univ, Dept Mech Engn, Nada Ku, 1-1 Rokkodai, Kobe, Hyogo 6578501, Japan
[4] Kyoto Univ, Inst Integrated Radiat & Nucl Sci, 2-1010 Asashironishi, Kumatori, Sennan 5900494, Japan
关键词
Neutron radiography; Supercritical water; Heavy oil; Flow visualization; MIXING BEHAVIOR; PACKED-BED; FLOW; PYROLYSIS; REACTOR;
D O I
10.1016/j.ces.2020.115816
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Supercritical water upgrading of heavy oil has attracted considerable attention, as the upgrading process can reduce the sulfur content and decrease the average molecular weight of the oil. Understanding the flow and mixing behavior of heavy oil in supercritical water is important to improve the process efficiency. We performed neutron radiography experiments to directly visualize the behavior of heavy oil in supercritical water. Atmospheric residue was used as a heavy oil sample, and the heavy oil and supercritical water were supplied countercurrently to a 1/2-inch tube reactor packed with Al2O3 particles with a diameter of 3 mm; the pressure and temperature were set to 25 MPa and 400 degrees C. The behavior of the heavy oil in the supercritical water depended on the oil and water flow rates. This study demonstrates that neutron radiography is a feasible visualization technique for the investigation of heavy oil behavior in supercritical water. (c) 2020 Elsevier Ltd. All rights reserved.
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页数:4
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