Classification of the main types of absorbers
Absorption with chemical reaction

Figure 1 shows the different types of gas-liquid absorbers used in industry. Their main characteristics, i.e. dispersed phase fractions, interfacial areas, gas-side and liquid-side material transfer coefficients, fields of use and application examples are listed for information in Table 1 according to [1][2]. These different absorbers are classed, in the conventional way, according to liquid retentionε_L (volume of liquid per unit volume of reactor):

• high retention: bubble column, stirred tank, submerged jet ;

• medium retention: tray and packed columns ;

• low retention: film and spray columns, venturi, ejector.

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