Plate distillation absorption

For gas absorption, the equipment possibilities are generally packed columns plate distillation towers, possibly with mechanical agitation on every plate deep-bed contactors (bubble columns or sparged lagoons) and mechanically agitated vessels or lagoons. Packed towers and plate distillation columns are discussed elsewhere. Generally these... 

The transfer of mass from one phase to another is involved in the operations of distillation, absorption, extraction, humidification, adsorption, drying, and crystallization. The principal function of the equipment used for these operations is to permit efficient contact between the phases. Many special types of equipment have been developed that are particularly applicable for use with a given operation, but finite-stage contactors and continuous contactors are the types most commonly encountered. A major part of this chapter, therefore, is devoted to the design aspects and costs of stagewise plate contactors and continuous packed contactors. 

The efficiency of a stage or plate in a distillation, absorption, or extraction operation is a function of the mass-transfer rates and transfer coefficients. When material is removed from a permeable solid, as in leaching or drying operations, the transfer rates and sometimes the stage efficiencies can be estimated from diffusion theory. 

Before presenting cost data for plates and packings in distillation, absorption, and stripping towers, the following example is presented to estimate the purchase cost of an adiabatic, homogeneous, gas-phase reactor. 

The variety of equipment used for extraction is much greater than for distillation, absorption, and stripping. Efficient contacting and separating of two liquid phases is considerably more difficult than contacting and separating a vapor and a liquid. In addition to plate and packed (random, structured and membrane) columns, many specialized pieces of equipment have been developed. Some of these are... 

An absorber column is a device used to remove selected components from a gas stream by contacting the stream with a gas or liquid. A typical gas absorber is a plate distillation column or packed distillation column that ensures intimate contact between raw natural gas and an absorption medium. Absorption can roughly be compared to fractionation, although absorption columns work differently than typical fractionators because during the process the vapor and liquid do not vaporize to any degree. 

Theoretical Plates in Distillation, Absorption and Stripping -Choice of Type of Column... 

Since the transfer of material between phases takes place on the plates, the degree of gas absorption, or of separation in the case of a distillation column, depends directly on their number. 

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