Packing material random

There are two basic types of packing materials random and structured packings. Random packings are commonly formed from different shapes such as rings, shown in Figure 9.19, or saddles, shown in Figure 9.20. They are constructed out of ceramic, metal, plastics, or coke with the most popular metal application being... 

Packing material Random, ceramic Raschig ring, 2 in. 

Fig. 2. Packing materials for packed columns, (a)—(f) Typical packing elements generally used for random packing (g) example of stmctured packing.

Introduction Packed columns for gas-liquid contacting are used extensively for absorption, stripping, and distillation operations. Usually the columns are filled with a randomly oriented packing material, but for an increasing number of applications the packing is very care-... 

The term porosity refers to the fraction of the medium that contains the voids. When a fluid is passed over the medium, the fraction of the medium (i.e., the pores) that contributes to the flow is referred to as the effective porosity of the media. In a general sense, porous media are classified as either unconsolidated and consolidated and/or as ordered and random. Examples of unconsolidated media are sand, glass beads, catalyst pellets, column packing materials, soil, gravel and packing such as charcoal. 

Wetting For operation at low liquid loads, the onset of minimum wetting can adversely affect scale-up, particularly with random packings and aqueous systems. Scale-up reliability at low liquid loads can be improved by pilot-testing at the composition range expected in the prototype, and by using identical packing materials and surface treatment in the pilot tests and in the prototype. 

For a preliminary reference and guide to the broad comparison of packings versus various distillation tray types Table 9-21 is helpful. Although the table includes the listing for more prominent manufacturers of trays and packing materials, it is not all inclusive as far as reliable manufacturers of either trays or packing. Table 9-22 [123] compares trays, random and structured packing, and HETP, where... 

The chemical composition of recycled polymer waste material (in Germany mainly from packing materials) can be described only for random samples, as the portions of different polymers, additives, and contaminations may differ considerably, depending on... 

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