Inner-pipe structure to improve column heterogeneity and peak shape
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Updated: Apr 26, 2026

Curtain Flow Column: Optimization of Efficiency and Sensitivity
Published on: June 12, 2016
Di Hu1, Xiang Mei1, Pengchao Shi1
1College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029 China.
Abstract:
Column heterogeneity plays an important role in peak tailing and asymmetric profiles. We have designed a novel column structure (concentric column structure) that has a concentric inner-pipe nested in a column. This structure was studied by a number calculation method and wider diameter column experiments. The results showed that column heterogeneity and column efficiency were improved by inner-pipe structure. Moreover, the results showed that high-efficiency columns were stronger influenced by inner-pipe structure than low-efficiency columns. The influence of an inner-pipe was related to its size. The optimal inner-pipe diameter was nearly 0.625 times of column diameter. By using inner-pipe structure in this way, it was possible to decrease column heterogeneity and increase column efficiency of a wide-diameter column.
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