Preliminary experimental study for cryogenic distillation column with small inner diameter. (II)

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概要

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• Characteristics of a cryogenic distillation column having a small inner diameter (2 cm) were studied by separating N<SUB>2</SUB> and Ar for Dixon Ring, Coil Pack, Helix and Heli-Pak. The size of the packings was 1/6 of the inner diameter of the column. The overall HETP value represented no dependence on the vapor flow rate regardless of the packing species used. A tendency common in the four packing species was that the discrepancy between the calculated and experimentally observed Ar concentrations at the middle of the column was enhanced by the decrease in the vapor velocity. This result is ascribed to the pheno-menon that the effective vapor/liquid interface area of a portion near the large condenser differs from that near the wire holding the packings. Packings having small void fractions and densely-coiled structure like Coil Pack made this problem more serious. Dixon Ring has an exceptionally large void fraction, nevertheless it presents an adequately large vapor/liquid interface area. In fact, it presented the best set of results of the lower pressure drop, smaller HETP and more readiness in predicting column behavior by the stage model.

• 一般社団法人 日本原子力学会の論文

著者

• Kinoshita Masahiro

  Department Of Cell Biology Medical Research Institute Tokyo Medical And Dental University

• YAMANISHI Toshihiko

  Department of Thermonuclear Fusion Research, Japan Atomic Energy Research Institute

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• Preliminary experimental study for cryogenic distillation column with small inner diameter. (II)
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