日本金属学会誌

J. Japan Inst. Met. Mater, Vol. 79, No. 1 (2015),
pp. 16-22

Investigation of Particle Segregation in a Metal Hydride Packed Bed by Extracting Particle Size Distribution from a Three-Dimensional Image

Masahiko Okumura1, Yasuhiro Saito1, Yohsuke Matsushita1, Hideyuki Aoki1, Yoshiaki Kawakami2 and Katsuhiko Taki3

1Department of Chemical Engineering, Graduate School of Engineering, Tohoku University, Sendai 980-8579
2Research & Development Center, Takasago Thermal Engineering Co., Ltd., Atsugi 243-0213
3Nihon Visual Science, Inc., Tokyo 160-0022

Abstract:

Particle size distribution in a metal hydride packed bed was acquired from three-dimensional X-ray computed tomographic images, using an image recognition method to quantitatively evaluate particle size segregation in the bed. The image recognition method was constructed by combining the original seed-generating method with other methods (e.g., the watershed method). The image recognition method was first applied to glass bead packed beds. The results indicated that the method adequately estimated the particle size distribution of the packed bed from three-dimensional images. After this validation, the method was applied to metal hydride packed beds. The results corresponded with observation results obtained by previous study. These results confirm that the image acquisition method could be used to quantify particle size segregation. [doi:10.2320/jinstmet.J2014037]


(Received 2014/9/8)

Keywords:

packed bed, metal hydride, computed tomography, pulverization, segregation


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