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- Title
Determination of volumetric mass transfer coefficients of structured packings at two different column diameters.
- Authors
Schlager, Marcus; Haushofer, Georg; Triebl, Andrea; Wolf-Zöllner, Verena; Lehner, Markus
- Abstract
Considerable work has been done on method standardization for experimental characterization of column packings used in absorption processes. A detailed framework for determination of packing hydraulics as well as gas- and liquid-side volumetric mass transfer coefficients (k G a and k L a) has been established. Packing characterization experiments in large diameter columns result in high equipment and operating costs. Accurate extrapolation of packing properties from experiments in smaller diameter columns would therefore be highly desirable. However, diameter influence is currently not completely understood, making further work necessary. In this work, experiments for the determination of k G a and k L a values were carried out and evaluated independently in two plants (inner diameters 422 and 150 mm). Results from measurements conducted with three metal packings RSP 250Y, RMP N 250X and RMP N 250Y are in good agreement with existing literature data. k G a was found to be dependent on column diameter with larger diameters leading to increased k G a values. The overall effect (approx. 15 %) is consistent with previous works, suggesting the possibility of deriving appropriate scaling factors once the findings are validated by a larger sample size. No clear dependence of k L a values on diameter was found with deviations significantly smaller than for k G a measurements. [Display omitted] • Three column packings are surveyed using standardized methodology. • Results from two different column diameters (150 and 422 mm) are compared. • k G a values are found 15 % lower at the smaller column diameter. • No influence of column diameter on k L a values is observed.
- Subjects
MASS transfer coefficients; COLUMNS; DIAMETER; PACKED towers (Chemical engineering); OPERATING costs
- Publication
Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A, 2022, Vol 186, p462
- ISSN
0263-8762
- Publication type
Article
- DOI
10.1016/j.cherd.2022.08.002