Packing column design

Robbins [96] suggested random packed column design is similar to others presented in this text, but high-lighted to determine diameter of packed column ... 

Coker, A K., Understand the Basics of Packed-Column Design, Chem. Eng. Prog. Nov. (1991) p. 93. 

The gas liquid contact in a packed bed column is continuous, not stage-wise, as in a plate column. The liquid flows down the column over the packing surface and the gas or vapour, counter-currently, up the column. In some gas-absorption columns co-current flow is used. The performance of a packed column is very dependent on the maintenance of good liquid and gas distribution throughout the packed bed, and this is an important consideration in packed-column design. 

These steps are discussed in the following sections, and a packed-column design illustrated... 

Bolles, W. L. and Fair, J. R. (1982) Chem. Eng., NY 89 (July 12) 109. Improved mass transfer model enhances packed-column design. 

As in the chapter on packed column design, the characteristics of many of the equations discussed in this chapter will be examined employing realistic chromatographic conditions and the typical conditions chosen for an open tubular column are given in table 1. 

FIG. 14-73 Liquid holdup, air-water data by Billet ( Packed Column Design and Analysis, Ruhr University, Bochum, Germany), preloading regime. (From Kister H. Z., Distillation Design, copyright by McGraw-Hill reprinted with permission.)... 

Region A-B (Fig. 8.16a) has turbulent liquid film, good wetting of the packing, good mass transfer, and essentially constant efficiency. This region is ideal for packed column design and operation. 

Bolles, W. L., and Fair,J. R., Improved Mass-Transfer Model Enhances Packed-Column Design, Chem. Eng. V. 89, No. 14 (1982) p. 109. 

The total weight of the plate column is usually less than for the packed column designed for the same capacity. 

Packed columns have been used in chemical industry for more than a century. The packing in a packed column provides a large surface area over which the gas contacts the liquid and the gas-to-liquid (and vice versa) mass transfer occurs (Fig. 3). As a result, the gas-liquid mass transfer process in a packed column is very efficient. Research and development on packed column has received much attention. One of the earlier and original literatures reported by Leva covers the principles of gas-liquid mass transfer in a packed bed, as well as packed column design and column internals. Recent reported literatures on gas absorption in a packed column from Fair et al., Strigle, and Billet are excellent references on transport phenomena in a packed column and packed column design. 

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