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Separation Process Engineering: Includes Mass Transfer Analysis, Third Edition by Phillip C. Wankat

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10.11 Economic Trade-Offs for Packed Columns

In the design of a packed column the designer has many trade-offs that are ultimately reflected in the operating and capital costs. After deciding that a packed column will be used instead of a staged column, the designer must choose the packing type. There is no single packing that is most economical for all separations. For most distillation systems the more efficient packings (low HETP and low F) are most expensive per volume but may be cheaper overall. The designer must then pick the material of construction. Since random commercial packings of the same size will all have an HETP in the range of 1 to 2 feet, the major difference between them is the packing factor, F. Perusal of Table 10-3 shows ...

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